// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/soc/tegra/pmc.c
 *
 * Copyright (c) 2010 Google, Inc
 * Copyright (c) 2018-2020, NVIDIA CORPORATION. All rights reserved.
 *
 * Author:
 *      Colin Cross <ccross@google.com>
 */

#define pr_fmt(fmt) "tegra-pmc: " fmt

#include <linux/arm-smccc.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/clk-conf.h>
#include <linux/clk/tegra.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/irqdomain.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/of_clk.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/spinlock.h>

#include <soc/tegra/common.h>
#include <soc/tegra/fuse.h>
#include <soc/tegra/pmc.h>

#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h>
#include <dt-bindings/gpio/tegra186-gpio.h>
#include <dt-bindings/gpio/tegra194-gpio.h>
#include <dt-bindings/soc/tegra-pmc.h>

#define PMC_CNTRL                       0x0
#define  PMC_CNTRL_INTR_POLARITY        BIT(17) /* inverts INTR polarity */
#define  PMC_CNTRL_CPU_PWRREQ_OE        BIT(16) /* CPU pwr req enable */
#define  PMC_CNTRL_CPU_PWRREQ_POLARITY  BIT(15) /* CPU pwr req polarity */
#define  PMC_CNTRL_SIDE_EFFECT_LP0      BIT(14) /* LP0 when CPU pwr gated */
#define  PMC_CNTRL_SYSCLK_OE            BIT(11) /* system clock enable */
#define  PMC_CNTRL_SYSCLK_POLARITY      BIT(10) /* sys clk polarity */
#define  PMC_CNTRL_PWRREQ_POLARITY      BIT(8)
#define  PMC_CNTRL_BLINK_EN             7
#define  PMC_CNTRL_MAIN_RST             BIT(4)

#define PMC_WAKE_MASK                   0x0c
#define PMC_WAKE_LEVEL                  0x10
#define PMC_WAKE_STATUS                 0x14
#define PMC_SW_WAKE_STATUS              0x18
#define PMC_DPD_PADS_ORIDE              0x1c
#define  PMC_DPD_PADS_ORIDE_BLINK       20

#define DPD_SAMPLE                      0x020
#define  DPD_SAMPLE_ENABLE              BIT(0)
#define  DPD_SAMPLE_DISABLE             (0 << 0)

#define PWRGATE_TOGGLE                  0x30
#define  PWRGATE_TOGGLE_START           BIT(8)

#define REMOVE_CLAMPING                 0x34

#define PWRGATE_STATUS                  0x38

#define PMC_BLINK_TIMER                 0x40
#define PMC_IMPL_E_33V_PWR              0x40

#define PMC_PWR_DET                     0x48

#define PMC_SCRATCH0_MODE_RECOVERY      BIT(31)
#define PMC_SCRATCH0_MODE_BOOTLOADER    BIT(30)
#define PMC_SCRATCH0_MODE_RCM           BIT(1)
#define PMC_SCRATCH0_MODE_MASK          (PMC_SCRATCH0_MODE_RECOVERY | \
                                         PMC_SCRATCH0_MODE_BOOTLOADER | \
                                         PMC_SCRATCH0_MODE_RCM)

#define PMC_CPUPWRGOOD_TIMER            0xc8
#define PMC_CPUPWROFF_TIMER             0xcc
#define PMC_COREPWRGOOD_TIMER           0x3c
#define PMC_COREPWROFF_TIMER            0xe0

#define PMC_PWR_DET_VALUE               0xe4

#define PMC_USB_DEBOUNCE_DEL            0xec
#define PMC_USB_AO                      0xf0

#define PMC_SCRATCH41                   0x140

#define PMC_WAKE2_MASK                  0x160
#define PMC_WAKE2_LEVEL                 0x164
#define PMC_WAKE2_STATUS                0x168
#define PMC_SW_WAKE2_STATUS             0x16c

#define PMC_CLK_OUT_CNTRL               0x1a8
#define  PMC_CLK_OUT_MUX_MASK           GENMASK(1, 0)
#define PMC_SENSOR_CTRL                 0x1b0
#define  PMC_SENSOR_CTRL_SCRATCH_WRITE  BIT(2)
#define  PMC_SENSOR_CTRL_ENABLE_RST     BIT(1)

#define  PMC_RST_STATUS_POR             0
#define  PMC_RST_STATUS_WATCHDOG        1
#define  PMC_RST_STATUS_SENSOR          2
#define  PMC_RST_STATUS_SW_MAIN         3
#define  PMC_RST_STATUS_LP0             4
#define  PMC_RST_STATUS_AOTAG           5

#define IO_DPD_REQ                      0x1b8
#define  IO_DPD_REQ_CODE_IDLE           (0U << 30)
#define  IO_DPD_REQ_CODE_OFF            (1U << 30)
#define  IO_DPD_REQ_CODE_ON             (2U << 30)
#define  IO_DPD_REQ_CODE_MASK           (3U << 30)

#define IO_DPD_STATUS                   0x1bc
#define IO_DPD2_REQ                     0x1c0
#define IO_DPD2_STATUS                  0x1c4
#define SEL_DPD_TIM                     0x1c8

#define PMC_UTMIP_UHSIC_TRIGGERS        0x1ec
#define PMC_UTMIP_UHSIC_SAVED_STATE     0x1f0

#define PMC_UTMIP_TERM_PAD_CFG          0x1f8
#define PMC_UTMIP_UHSIC_SLEEP_CFG       0x1fc
#define PMC_UTMIP_UHSIC_FAKE            0x218

#define PMC_SCRATCH54                   0x258
#define  PMC_SCRATCH54_DATA_SHIFT       8
#define  PMC_SCRATCH54_ADDR_SHIFT       0

#define PMC_SCRATCH55                   0x25c
#define  PMC_SCRATCH55_RESET_TEGRA      BIT(31)
#define  PMC_SCRATCH55_CNTRL_ID_SHIFT   27
#define  PMC_SCRATCH55_PINMUX_SHIFT     24
#define  PMC_SCRATCH55_16BITOP          BIT(15)
#define  PMC_SCRATCH55_CHECKSUM_SHIFT   16
#define  PMC_SCRATCH55_I2CSLV1_SHIFT    0

#define  PMC_UTMIP_UHSIC_LINE_WAKEUP    0x26c

#define PMC_UTMIP_BIAS_MASTER_CNTRL     0x270
#define PMC_UTMIP_MASTER_CONFIG         0x274
#define PMC_UTMIP_UHSIC2_TRIGGERS       0x27c
#define PMC_UTMIP_MASTER2_CONFIG        0x29c

#define GPU_RG_CNTRL                    0x2d4

#define PMC_UTMIP_PAD_CFG0              0x4c0
#define PMC_UTMIP_UHSIC_SLEEP_CFG1      0x4d0
#define PMC_UTMIP_SLEEPWALK_P3          0x4e0
/* Tegra186 and later */
#define WAKE_AOWAKE_CNTRL(x) (0x000 + ((x) << 2))
#define WAKE_AOWAKE_CNTRL_LEVEL (1 << 3)
#define WAKE_AOWAKE_MASK_W(x) (0x180 + ((x) << 2))
#define WAKE_AOWAKE_MASK_R(x) (0x300 + ((x) << 2))
#define WAKE_AOWAKE_STATUS_W(x) (0x30c + ((x) << 2))
#define WAKE_AOWAKE_STATUS_R(x) (0x48c + ((x) << 2))
#define WAKE_AOWAKE_TIER0_ROUTING(x) (0x4b4 + ((x) << 2))
#define WAKE_AOWAKE_TIER1_ROUTING(x) (0x4c0 + ((x) << 2))
#define WAKE_AOWAKE_TIER2_ROUTING(x) (0x4cc + ((x) << 2))

#define WAKE_AOWAKE_CTRL 0x4f4
#define  WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0)

/* for secure PMC */
#define TEGRA_SMC_PMC           0xc2fffe00
#define  TEGRA_SMC_PMC_READ     0xaa
#define  TEGRA_SMC_PMC_WRITE    0xbb

struct pmc_clk {
        struct clk_hw   hw;
        unsigned long   offs;
        u32             mux_shift;
        u32             force_en_shift;
};

#define to_pmc_clk(_hw) container_of(_hw, struct pmc_clk, hw)

struct pmc_clk_gate {
        struct clk_hw   hw;
        unsigned long   offs;
        u32             shift;
};

#define to_pmc_clk_gate(_hw) container_of(_hw, struct pmc_clk_gate, hw)

struct pmc_clk_init_data {
        char *name;
        const char *const *parents;
        int num_parents;
        int clk_id;
        u8 mux_shift;
        u8 force_en_shift;
};

static const char * const clk_out1_parents[] = { "osc", "osc_div2",
        "osc_div4", "extern1",
};

static const char * const clk_out2_parents[] = { "osc", "osc_div2",
        "osc_div4", "extern2",
};

static const char * const clk_out3_parents[] = { "osc", "osc_div2",
        "osc_div4", "extern3",
};

static const struct pmc_clk_init_data tegra_pmc_clks_data[] = {
        {
                .name = "pmc_clk_out_1",
                .parents = clk_out1_parents,
                .num_parents = ARRAY_SIZE(clk_out1_parents),
                .clk_id = TEGRA_PMC_CLK_OUT_1,
                .mux_shift = 6,
                .force_en_shift = 2,
        },
        {
                .name = "pmc_clk_out_2",
                .parents = clk_out2_parents,
                .num_parents = ARRAY_SIZE(clk_out2_parents),
                .clk_id = TEGRA_PMC_CLK_OUT_2,
                .mux_shift = 14,
                .force_en_shift = 10,
        },
        {
                .name = "pmc_clk_out_3",
                .parents = clk_out3_parents,
                .num_parents = ARRAY_SIZE(clk_out3_parents),
                .clk_id = TEGRA_PMC_CLK_OUT_3,
                .mux_shift = 22,
                .force_en_shift = 18,
        },
};

struct tegra_powergate {
        struct generic_pm_domain genpd;
        struct tegra_pmc *pmc;
        unsigned int id;
        struct clk **clks;
        unsigned int num_clks;
        unsigned long *clk_rates;
        struct reset_control *reset;
};

struct tegra_io_pad_soc {
        enum tegra_io_pad id;
        unsigned int dpd;
        unsigned int voltage;
        const char *name;
};

struct tegra_pmc_regs {
        unsigned int scratch0;
        unsigned int dpd_req;
        unsigned int dpd_status;
        unsigned int dpd2_req;
        unsigned int dpd2_status;
        unsigned int rst_status;
        unsigned int rst_source_shift;
        unsigned int rst_source_mask;
        unsigned int rst_level_shift;
        unsigned int rst_level_mask;
};

struct tegra_wake_event {
        const char *name;
        unsigned int id;
        unsigned int irq;
        struct {
                unsigned int instance;
                unsigned int pin;
        } gpio;
};

#define TEGRA_WAKE_IRQ(_name, _id, _irq)                \
        {                                               \
                .name = _name,                          \
                .id = _id,                              \
                .irq = _irq,                            \
                .gpio = {                               \
                        .instance = UINT_MAX,           \
                        .pin = UINT_MAX,                \
                },                                      \
        }

#define TEGRA_WAKE_GPIO(_name, _id, _instance, _pin)    \
        {                                               \
                .name = _name,                          \
                .id = _id,                              \
                .irq = 0,                               \
                .gpio = {                               \
                        .instance = _instance,          \
                        .pin = _pin,                    \
                },                                      \
        }

struct tegra_pmc_soc {
        unsigned int num_powergates;
        const char *const *powergates;
        unsigned int num_cpu_powergates;
        const u8 *cpu_powergates;

        bool has_tsense_reset;
        bool has_gpu_clamps;
        bool needs_mbist_war;
        bool has_impl_33v_pwr;
        bool maybe_tz_only;

        const struct tegra_io_pad_soc *io_pads;
        unsigned int num_io_pads;

        const struct pinctrl_pin_desc *pin_descs;
        unsigned int num_pin_descs;

        const struct tegra_pmc_regs *regs;
        void (*init)(struct tegra_pmc *pmc);
        void (*setup_irq_polarity)(struct tegra_pmc *pmc,
                                   struct device_node *np,
                                   bool invert);
        int (*irq_set_wake)(struct irq_data *data, unsigned int on);
        int (*irq_set_type)(struct irq_data *data, unsigned int type);
        int (*powergate_set)(struct tegra_pmc *pmc, unsigned int id,
                             bool new_state);

        const char * const *reset_sources;
        unsigned int num_reset_sources;
        const char * const *reset_levels;
        unsigned int num_reset_levels;

        /*
         * These describe events that can wake the system from sleep (i.e.
         * LP0 or SC7). Wakeup from other sleep states (such as LP1 or LP2)
         * are dealt with in the LIC.
         */
        const struct tegra_wake_event *wake_events;
        unsigned int num_wake_events;

        const struct pmc_clk_init_data *pmc_clks_data;
        unsigned int num_pmc_clks;
        bool has_blink_output;
        bool has_usb_sleepwalk;
        bool supports_core_domain;
};

/**
 * struct tegra_pmc - NVIDIA Tegra PMC
 * @dev: pointer to PMC device structure
 * @base: pointer to I/O remapped register region
 * @wake: pointer to I/O remapped region for WAKE registers
 * @aotag: pointer to I/O remapped region for AOTAG registers
 * @scratch: pointer to I/O remapped region for scratch registers
 * @clk: pointer to pclk clock
 * @soc: pointer to SoC data structure
 * @tz_only: flag specifying if the PMC can only be accessed via TrustZone
 * @debugfs: pointer to debugfs entry
 * @rate: currently configured rate of pclk
 * @suspend_mode: lowest suspend mode available
 * @cpu_good_time: CPU power good time (in microseconds)
 * @cpu_off_time: CPU power off time (in microsecends)
 * @core_osc_time: core power good OSC time (in microseconds)
 * @core_pmu_time: core power good PMU time (in microseconds)
 * @core_off_time: core power off time (in microseconds)
 * @corereq_high: core power request is active-high
 * @sysclkreq_high: system clock request is active-high
 * @combined_req: combined power request for CPU & core
 * @cpu_pwr_good_en: CPU power good signal is enabled
 * @lp0_vec_phys: physical base address of the LP0 warm boot code
 * @lp0_vec_size: size of the LP0 warm boot code
 * @powergates_available: Bitmap of available power gates
 * @powergates_lock: mutex for power gate register access
 * @pctl_dev: pin controller exposed by the PMC
 * @domain: IRQ domain provided by the PMC
 * @irq: chip implementation for the IRQ domain
 * @clk_nb: pclk clock changes handler
 */
struct tegra_pmc {
        struct device *dev;
        void __iomem *base;
        void __iomem *wake;
        void __iomem *aotag;
        void __iomem *scratch;
        struct clk *clk;
        struct dentry *debugfs;

        const struct tegra_pmc_soc *soc;
        bool tz_only;

        unsigned long rate;

        enum tegra_suspend_mode suspend_mode;
        u32 cpu_good_time;
        u32 cpu_off_time;
        u32 core_osc_time;
        u32 core_pmu_time;
        u32 core_off_time;
        bool corereq_high;
        bool sysclkreq_high;
        bool combined_req;
        bool cpu_pwr_good_en;
        u32 lp0_vec_phys;
        u32 lp0_vec_size;
        DECLARE_BITMAP(powergates_available, TEGRA_POWERGATE_MAX);

        struct mutex powergates_lock;

        struct pinctrl_dev *pctl_dev;

        struct irq_domain *domain;
        struct irq_chip irq;

        struct notifier_block clk_nb;

        bool core_domain_state_synced;
        bool core_domain_registered;
};

static struct tegra_pmc *pmc = &(struct tegra_pmc) {
        .base = NULL,
        .suspend_mode = TEGRA_SUSPEND_NOT_READY,
};

static inline struct tegra_powergate *
to_powergate(struct generic_pm_domain *domain)
{
        return container_of(domain, struct tegra_powergate, genpd);
}

static u32 tegra_pmc_readl(struct tegra_pmc *pmc, unsigned long offset)
{
        struct arm_smccc_res res;

        if (pmc->tz_only) {
                arm_smccc_smc(TEGRA_SMC_PMC, TEGRA_SMC_PMC_READ, offset, 0, 0,
                              0, 0, 0, &res);
                if (res.a0) {
                        if (pmc->dev)
                                dev_warn(pmc->dev, "%s(): SMC failed: %lu\n",
                                         __func__, res.a0);
                        else
                                pr_warn("%s(): SMC failed: %lu\n", __func__,
                                        res.a0);
                }

                return res.a1;
        }

        return readl(pmc->base + offset);
}

static void tegra_pmc_writel(struct tegra_pmc *pmc, u32 value,
                             unsigned long offset)
{
        struct arm_smccc_res res;

        if (pmc->tz_only) {
                arm_smccc_smc(TEGRA_SMC_PMC, TEGRA_SMC_PMC_WRITE, offset,
                              value, 0, 0, 0, 0, &res);
                if (res.a0) {
                        if (pmc->dev)
                                dev_warn(pmc->dev, "%s(): SMC failed: %lu\n",
                                         __func__, res.a0);
                        else
                                pr_warn("%s(): SMC failed: %lu\n", __func__,
                                        res.a0);
                }
        } else {
                writel(value, pmc->base + offset);
        }
}

static u32 tegra_pmc_scratch_readl(struct tegra_pmc *pmc, unsigned long offset)
{
        if (pmc->tz_only)
                return tegra_pmc_readl(pmc, offset);

        return readl(pmc->scratch + offset);
}

static void tegra_pmc_scratch_writel(struct tegra_pmc *pmc, u32 value,
                                     unsigned long offset)
{
        if (pmc->tz_only)
                tegra_pmc_writel(pmc, value, offset);
        else
                writel(value, pmc->scratch + offset);
}

/*
 * TODO Figure out a way to call this with the struct tegra_pmc * passed in.
 * This currently doesn't work because readx_poll_timeout() can only operate
 * on functions that take a single argument.
 */
static inline bool tegra_powergate_state(int id)
{
        if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
                return (tegra_pmc_readl(pmc, GPU_RG_CNTRL) & 0x1) == 0;
        else
                return (tegra_pmc_readl(pmc, PWRGATE_STATUS) & BIT(id)) != 0;
}

static inline bool tegra_powergate_is_valid(struct tegra_pmc *pmc, int id)
{
        return (pmc->soc && pmc->soc->powergates[id]);
}

static inline bool tegra_powergate_is_available(struct tegra_pmc *pmc, int id)
{
        return test_bit(id, pmc->powergates_available);
}

static int tegra_powergate_lookup(struct tegra_pmc *pmc, const char *name)
{
        unsigned int i;

        if (!pmc || !pmc->soc || !name)
                return -EINVAL;

        for (i = 0; i < pmc->soc->num_powergates; i++) {
                if (!tegra_powergate_is_valid(pmc, i))
                        continue;

                if (!strcmp(name, pmc->soc->powergates[i]))
                        return i;
        }

        return -ENODEV;
}

static int tegra20_powergate_set(struct tegra_pmc *pmc, unsigned int id,
                                 bool new_state)
{
        unsigned int retries = 100;
        bool status;
        int ret;

        /*
         * As per TRM documentation, the toggle command will be dropped by PMC
         * if there is contention with a HW-initiated toggling (i.e. CPU core
         * power-gated), the command should be retried in that case.
         */
        do {
                tegra_pmc_writel(pmc, PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);

                /* wait for PMC to execute the command */
                ret = readx_poll_timeout(tegra_powergate_state, id, status,
                                         status == new_state, 1, 10);
        } while (ret == -ETIMEDOUT && retries--);

        return ret;
}

static inline bool tegra_powergate_toggle_ready(struct tegra_pmc *pmc)
{
        return !(tegra_pmc_readl(pmc, PWRGATE_TOGGLE) & PWRGATE_TOGGLE_START);
}

static int tegra114_powergate_set(struct tegra_pmc *pmc, unsigned int id,
                                  bool new_state)
{
        bool status;
        int err;

        /* wait while PMC power gating is contended */
        err = readx_poll_timeout(tegra_powergate_toggle_ready, pmc, status,
                                 status == true, 1, 100);
        if (err)
                return err;

        tegra_pmc_writel(pmc, PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);

        /* wait for PMC to accept the command */
        err = readx_poll_timeout(tegra_powergate_toggle_ready, pmc, status,
                                 status == true, 1, 100);
        if (err)
                return err;

        /* wait for PMC to execute the command */
        err = readx_poll_timeout(tegra_powergate_state, id, status,
                                 status == new_state, 10, 100000);
        if (err)
                return err;

        return 0;
}

/**
 * tegra_powergate_set() - set the state of a partition
 * @pmc: power management controller
 * @id: partition ID
 * @new_state: new state of the partition
 */
static int tegra_powergate_set(struct tegra_pmc *pmc, unsigned int id,
                               bool new_state)
{
        int err;

        if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
                return -EINVAL;

        mutex_lock(&pmc->powergates_lock);

        if (tegra_powergate_state(id) == new_state) {
                mutex_unlock(&pmc->powergates_lock);
                return 0;
        }

        err = pmc->soc->powergate_set(pmc, id, new_state);

        mutex_unlock(&pmc->powergates_lock);

        return err;
}

static int __tegra_powergate_remove_clamping(struct tegra_pmc *pmc,
                                             unsigned int id)
{
        u32 mask;

        mutex_lock(&pmc->powergates_lock);

        /*
         * On Tegra124 and later, the clamps for the GPU are controlled by a
         * separate register (with different semantics).
         */
        if (id == TEGRA_POWERGATE_3D) {
                if (pmc->soc->has_gpu_clamps) {
                        tegra_pmc_writel(pmc, 0, GPU_RG_CNTRL);
                        goto out;
                }
        }

        /*
         * Tegra 2 has a bug where PCIE and VDE clamping masks are
         * swapped relatively to the partition ids
         */
        if (id == TEGRA_POWERGATE_VDEC)
                mask = (1 << TEGRA_POWERGATE_PCIE);
        else if (id == TEGRA_POWERGATE_PCIE)
                mask = (1 << TEGRA_POWERGATE_VDEC);
        else
                mask = (1 << id);

        tegra_pmc_writel(pmc, mask, REMOVE_CLAMPING);

out:
        mutex_unlock(&pmc->powergates_lock);

        return 0;
}

static int tegra_powergate_prepare_clocks(struct tegra_powergate *pg)
{
        unsigned long safe_rate = 100 * 1000 * 1000;
        unsigned int i;
        int err;

        for (i = 0; i < pg->num_clks; i++) {
                pg->clk_rates[i] = clk_get_rate(pg->clks[i]);

                if (!pg->clk_rates[i]) {
                        err = -EINVAL;
                        goto out;
                }

                if (pg->clk_rates[i] <= safe_rate)
                        continue;

                /*
                 * We don't know whether voltage state is okay for the
                 * current clock rate, hence it's better to temporally
                 * switch clock to a safe rate which is suitable for
                 * all voltages, before enabling the clock.
                 */
                err = clk_set_rate(pg->clks[i], safe_rate);
                if (err)
                        goto out;
        }

        return 0;

out:
        while (i--)
                clk_set_rate(pg->clks[i], pg->clk_rates[i]);

        return err;
}

static int tegra_powergate_unprepare_clocks(struct tegra_powergate *pg)
{
        unsigned int i;
        int err;

        for (i = 0; i < pg->num_clks; i++) {
                err = clk_set_rate(pg->clks[i], pg->clk_rates[i]);
                if (err)
                        return err;
        }

        return 0;
}

static void tegra_powergate_disable_clocks(struct tegra_powergate *pg)
{
        unsigned int i;

        for (i = 0; i < pg->num_clks; i++)
                clk_disable_unprepare(pg->clks[i]);
}

static int tegra_powergate_enable_clocks(struct tegra_powergate *pg)
{
        unsigned int i;
        int err;

        for (i = 0; i < pg->num_clks; i++) {
                err = clk_prepare_enable(pg->clks[i]);
                if (err)
                        goto out;
        }

        return 0;

out:
        while (i--)
                clk_disable_unprepare(pg->clks[i]);

        return err;
}

static int tegra_powergate_power_up(struct tegra_powergate *pg,
                                    bool disable_clocks)
{
        int err;

        err = reset_control_assert(pg->reset);
        if (err)
                return err;

        usleep_range(10, 20);

        err = tegra_powergate_set(pg->pmc, pg->id, true);
        if (err < 0)
                return err;

        usleep_range(10, 20);

        err = tegra_powergate_prepare_clocks(pg);
        if (err)
                goto powergate_off;

        err = tegra_powergate_enable_clocks(pg);
        if (err)
                goto unprepare_clks;

        usleep_range(10, 20);

        err = __tegra_powergate_remove_clamping(pg->pmc, pg->id);
        if (err)
                goto disable_clks;

        usleep_range(10, 20);

        err = reset_control_deassert(pg->reset);
        if (err)
                goto disable_clks;

        usleep_range(10, 20);

        if (pg->pmc->soc->needs_mbist_war)
                err = tegra210_clk_handle_mbist_war(pg->id);
        if (err)
                goto disable_clks;

        if (disable_clocks)
                tegra_powergate_disable_clocks(pg);

        err = tegra_powergate_unprepare_clocks(pg);
        if (err)
                return err;

        return 0;

disable_clks:
        tegra_powergate_disable_clocks(pg);
        usleep_range(10, 20);

unprepare_clks:
        tegra_powergate_unprepare_clocks(pg);

powergate_off:
        tegra_powergate_set(pg->pmc, pg->id, false);

        return err;
}

static int tegra_powergate_power_down(struct tegra_powergate *pg)
{
        int err;

        err = tegra_powergate_prepare_clocks(pg);
        if (err)
                return err;

        err = tegra_powergate_enable_clocks(pg);
        if (err)
                goto unprepare_clks;

        usleep_range(10, 20);

        err = reset_control_assert(pg->reset);
        if (err)
                goto disable_clks;

        usleep_range(10, 20);

        tegra_powergate_disable_clocks(pg);

        usleep_range(10, 20);

        err = tegra_powergate_set(pg->pmc, pg->id, false);
        if (err)
                goto assert_resets;

        err = tegra_powergate_unprepare_clocks(pg);
        if (err)
                return err;

        return 0;

assert_resets:
        tegra_powergate_enable_clocks(pg);
        usleep_range(10, 20);
        reset_control_deassert(pg->reset);
        usleep_range(10, 20);

disable_clks:
        tegra_powergate_disable_clocks(pg);

unprepare_clks:
        tegra_powergate_unprepare_clocks(pg);

        return err;
}

static int tegra_genpd_power_on(struct generic_pm_domain *domain)
{
        struct tegra_powergate *pg = to_powergate(domain);
        struct device *dev = pg->pmc->dev;
        int err;

        err = tegra_powergate_power_up(pg, true);
        if (err) {
                dev_err(dev, "failed to turn on PM domain %s: %d\n",
                        pg->genpd.name, err);
                goto out;
        }

        reset_control_release(pg->reset);

out:
        return err;
}

static int tegra_genpd_power_off(struct generic_pm_domain *domain)
{
        struct tegra_powergate *pg = to_powergate(domain);
        struct device *dev = pg->pmc->dev;
        int err;

        err = reset_control_acquire(pg->reset);
        if (err < 0) {
                dev_err(dev, "failed to acquire resets for PM domain %s: %d\n",
                        pg->genpd.name, err);
                return err;
        }

        err = tegra_powergate_power_down(pg);
        if (err) {
                dev_err(dev, "failed to turn off PM domain %s: %d\n",
                        pg->genpd.name, err);
                reset_control_release(pg->reset);
        }

        return err;
}

/**
 * tegra_powergate_power_on() - power on partition
 * @id: partition ID
 */
int tegra_powergate_power_on(unsigned int id)
{
        if (!tegra_powergate_is_available(pmc, id))
                return -EINVAL;

        return tegra_powergate_set(pmc, id, true);
}
EXPORT_SYMBOL(tegra_powergate_power_on);

/**
 * tegra_powergate_power_off() - power off partition
 * @id: partition ID
 */
int tegra_powergate_power_off(unsigned int id)
{
        if (!tegra_powergate_is_available(pmc, id))
                return -EINVAL;

        return tegra_powergate_set(pmc, id, false);
}
EXPORT_SYMBOL(tegra_powergate_power_off);

/**
 * tegra_powergate_is_powered() - check if partition is powered
 * @pmc: power management controller
 * @id: partition ID
 */
static int tegra_powergate_is_powered(struct tegra_pmc *pmc, unsigned int id)
{
        if (!tegra_powergate_is_valid(pmc, id))
                return -EINVAL;

        return tegra_powergate_state(id);
}

/**
 * tegra_powergate_remove_clamping() - remove power clamps for partition
 * @id: partition ID
 */
int tegra_powergate_remove_clamping(unsigned int id)
{
        if (!tegra_powergate_is_available(pmc, id))
                return -EINVAL;

        return __tegra_powergate_remove_clamping(pmc, id);
}
EXPORT_SYMBOL(tegra_powergate_remove_clamping);

/**
 * tegra_powergate_sequence_power_up() - power up partition
 * @id: partition ID
 * @clk: clock for partition
 * @rst: reset for partition
 *
 * Must be called with clk disabled, and returns with clk enabled.
 */
int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
                                      struct reset_control *rst)
{
        struct tegra_powergate *pg;
        int err;

        if (!tegra_powergate_is_available(pmc, id))
                return -EINVAL;

        pg = kzalloc(sizeof(*pg), GFP_KERNEL);
        if (!pg)
                return -ENOMEM;

        pg->clk_rates = kzalloc(sizeof(*pg->clk_rates), GFP_KERNEL);
        if (!pg->clk_rates) {
                kfree(pg->clks);
                return -ENOMEM;
        }

        pg->id = id;
        pg->clks = &clk;
        pg->num_clks = 1;
        pg->reset = rst;
        pg->pmc = pmc;

        err = tegra_powergate_power_up(pg, false);
        if (err)
                dev_err(pmc->dev, "failed to turn on partition %d: %d\n", id,
                        err);

        kfree(pg->clk_rates);
        kfree(pg);

        return err;
}
EXPORT_SYMBOL(tegra_powergate_sequence_power_up);

/**
 * tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
 * @pmc: power management controller
 * @cpuid: CPU partition ID
 *
 * Returns the partition ID corresponding to the CPU partition ID or a
 * negative error code on failure.
 */
static int tegra_get_cpu_powergate_id(struct tegra_pmc *pmc,
                                      unsigned int cpuid)
{
        if (pmc->soc && cpuid < pmc->soc->num_cpu_powergates)
                return pmc->soc->cpu_powergates[cpuid];

        return -EINVAL;
}

/**
 * tegra_pmc_cpu_is_powered() - check if CPU partition is powered
 * @cpuid: CPU partition ID
 */
bool tegra_pmc_cpu_is_powered(unsigned int cpuid)
{
        int id;

        id = tegra_get_cpu_powergate_id(pmc, cpuid);
        if (id < 0)
                return false;

        return tegra_powergate_is_powered(pmc, id);
}

/**
 * tegra_pmc_cpu_power_on() - power on CPU partition
 * @cpuid: CPU partition ID
 */
int tegra_pmc_cpu_power_on(unsigned int cpuid)
{
        int id;

        id = tegra_get_cpu_powergate_id(pmc, cpuid);
        if (id < 0)
                return id;

        return tegra_powergate_set(pmc, id, true);
}

/**
 * tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
 * @cpuid: CPU partition ID
 */
int tegra_pmc_cpu_remove_clamping(unsigned int cpuid)
{
        int id;

        id = tegra_get_cpu_powergate_id(pmc, cpuid);
        if (id < 0)
                return id;

        return tegra_powergate_remove_clamping(id);
}

static void tegra_pmc_program_reboot_reason(const char *cmd)
{
        u32 value;

        value = tegra_pmc_scratch_readl(pmc, pmc->soc->regs->scratch0);
        value &= ~PMC_SCRATCH0_MODE_MASK;

        if (cmd) {
                if (strcmp(cmd, "recovery") == 0)
                        value |= PMC_SCRATCH0_MODE_RECOVERY;

                if (strcmp(cmd, "bootloader") == 0)
                        value |= PMC_SCRATCH0_MODE_BOOTLOADER;

                if (strcmp(cmd, "forced-recovery") == 0)
                        value |= PMC_SCRATCH0_MODE_RCM;
        }

        tegra_pmc_scratch_writel(pmc, value, pmc->soc->regs->scratch0);
}

static int tegra_pmc_reboot_notify(struct notifier_block *this,
                                   unsigned long action, void *data)
{
        if (action == SYS_RESTART)
                tegra_pmc_program_reboot_reason(data);

        return NOTIFY_DONE;
}

static struct notifier_block tegra_pmc_reboot_notifier = {
        .notifier_call = tegra_pmc_reboot_notify,
};

static int tegra_pmc_restart_notify(struct notifier_block *this,
                                    unsigned long action, void *data)
{
        u32 value;

        /* reset everything but PMC_SCRATCH0 and PMC_RST_STATUS */
        value = tegra_pmc_readl(pmc, PMC_CNTRL);
        value |= PMC_CNTRL_MAIN_RST;
        tegra_pmc_writel(pmc, value, PMC_CNTRL);

        return NOTIFY_DONE;
}

static struct notifier_block tegra_pmc_restart_handler = {
        .notifier_call = tegra_pmc_restart_notify,
        .priority = 128,
};

static int powergate_show(struct seq_file *s, void *data)
{
        unsigned int i;
        int status;

        seq_printf(s, " powergate powered\n");
        seq_printf(s, "------------------\n");

        for (i = 0; i < pmc->soc->num_powergates; i++) {
                status = tegra_powergate_is_powered(pmc, i);
                if (status < 0)
                        continue;

                seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
                           status ? "yes" : "no");
        }

        return 0;
}

DEFINE_SHOW_ATTRIBUTE(powergate);

static int tegra_powergate_debugfs_init(void)
{
        pmc->debugfs = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
                                           &powergate_fops);
        if (!pmc->debugfs)
                return -ENOMEM;

        return 0;
}

static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
                                       struct device_node *np)
{
        struct clk *clk;
        unsigned int i, count;
        int err;

        count = of_clk_get_parent_count(np);
        if (count == 0)
                return -ENODEV;

        pg->clks = kcalloc(count, sizeof(clk), GFP_KERNEL);
        if (!pg->clks)
                return -ENOMEM;

        pg->clk_rates = kcalloc(count, sizeof(*pg->clk_rates), GFP_KERNEL);
        if (!pg->clk_rates) {
                kfree(pg->clks);
                return -ENOMEM;
        }

        for (i = 0; i < count; i++) {
                pg->clks[i] = of_clk_get(np, i);
                if (IS_ERR(pg->clks[i])) {
                        err = PTR_ERR(pg->clks[i]);
                        goto err;
                }
        }

        pg->num_clks = count;

        return 0;

err:
        while (i--)
                clk_put(pg->clks[i]);

        kfree(pg->clk_rates);
        kfree(pg->clks);

        return err;
}

static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
                                         struct device_node *np, bool off)
{
        struct device *dev = pg->pmc->dev;
        int err;

        pg->reset = of_reset_control_array_get_exclusive_released(np);
        if (IS_ERR(pg->reset)) {
                err = PTR_ERR(pg->reset);
                dev_err(dev, "failed to get device resets: %d\n", err);
                return err;
        }

        err = reset_control_acquire(pg->reset);
        if (err < 0) {
                pr_err("failed to acquire resets: %d\n", err);
                goto out;
        }

        if (off) {
                err = reset_control_assert(pg->reset);
        } else {
                err = reset_control_deassert(pg->reset);
                if (err < 0)
                        goto out;

                reset_control_release(pg->reset);
        }

out:
        if (err) {
                reset_control_release(pg->reset);
                reset_control_put(pg->reset);
        }

        return err;
}

static int tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
{
        struct device *dev = pmc->dev;
        struct tegra_powergate *pg;
        int id, err = 0;
        bool off;

        pg = kzalloc(sizeof(*pg), GFP_KERNEL);
        if (!pg)
                return -ENOMEM;

        id = tegra_powergate_lookup(pmc, np->name);
        if (id < 0) {
                dev_err(dev, "powergate lookup failed for %pOFn: %d\n", np, id);
                err = -ENODEV;
                goto free_mem;
        }

        /*
         * Clear the bit for this powergate so it cannot be managed
         * directly via the legacy APIs for controlling powergates.
         */
        clear_bit(id, pmc->powergates_available);

        pg->id = id;
        pg->genpd.name = np->name;
        pg->genpd.power_off = tegra_genpd_power_off;
        pg->genpd.power_on = tegra_genpd_power_on;
        pg->pmc = pmc;

        off = !tegra_powergate_is_powered(pmc, pg->id);

        err = tegra_powergate_of_get_clks(pg, np);
        if (err < 0) {
                dev_err(dev, "failed to get clocks for %pOFn: %d\n", np, err);
                goto set_available;
        }

        err = tegra_powergate_of_get_resets(pg, np, off);
        if (err < 0) {
                dev_err(dev, "failed to get resets for %pOFn: %d\n", np, err);
                goto remove_clks;
        }

        if (!IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS)) {
                if (off)
                        WARN_ON(tegra_powergate_power_up(pg, true));

                goto remove_resets;
        }

        err = pm_genpd_init(&pg->genpd, NULL, off);
        if (err < 0) {
                dev_err(dev, "failed to initialise PM domain %pOFn: %d\n", np,
                       err);
                goto remove_resets;
        }

        err = of_genpd_add_provider_simple(np, &pg->genpd);
        if (err < 0) {
                dev_err(dev, "failed to add PM domain provider for %pOFn: %d\n",
                        np, err);
                goto remove_genpd;
        }

        dev_dbg(dev, "added PM domain %s\n", pg->genpd.name);

        return 0;

remove_genpd:
        pm_genpd_remove(&pg->genpd);

remove_resets:
        reset_control_put(pg->reset);

remove_clks:
        while (pg->num_clks--)
                clk_put(pg->clks[pg->num_clks]);

        kfree(pg->clks);

set_available:
        set_bit(id, pmc->powergates_available);

free_mem:
        kfree(pg);

        return err;
}

bool tegra_pmc_core_domain_state_synced(void)
{
        return pmc->core_domain_state_synced;
}

static int
tegra_pmc_core_pd_set_performance_state(struct generic_pm_domain *genpd,
                                        unsigned int level)
{
        struct dev_pm_opp *opp;
        int err;

        opp = dev_pm_opp_find_level_ceil(&genpd->dev, &level);
        if (IS_ERR(opp)) {
                dev_err(&genpd->dev, "failed to find OPP for level %u: %pe\n",
                        level, opp);
                return PTR_ERR(opp);
        }

        mutex_lock(&pmc->powergates_lock);
        err = dev_pm_opp_set_opp(pmc->dev, opp);
        mutex_unlock(&pmc->powergates_lock);

        dev_pm_opp_put(opp);

        if (err) {
                dev_err(&genpd->dev, "failed to set voltage to %duV: %d\n",
                        level, err);
                return err;
        }

        return 0;
}

static unsigned int
tegra_pmc_core_pd_opp_to_performance_state(struct generic_pm_domain *genpd,
                                           struct dev_pm_opp *opp)
{
        return dev_pm_opp_get_level(opp);
}

static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
{
        struct generic_pm_domain *genpd;
        const char *rname = "core";
        int err;

        genpd = devm_kzalloc(pmc->dev, sizeof(*genpd), GFP_KERNEL);
        if (!genpd)
                return -ENOMEM;

        genpd->name = "core";
        genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
        genpd->opp_to_performance_state = tegra_pmc_core_pd_opp_to_performance_state;

        err = devm_pm_opp_set_regulators(pmc->dev, &rname, 1);
        if (err)
                return dev_err_probe(pmc->dev, err,
                                     "failed to set core OPP regulator\n");

        err = pm_genpd_init(genpd, NULL, false);
        if (err) {
                dev_err(pmc->dev, "failed to init core genpd: %d\n", err);
                return err;
        }

        err = of_genpd_add_provider_simple(np, genpd);
        if (err) {
                dev_err(pmc->dev, "failed to add core genpd: %d\n", err);
                goto remove_genpd;
        }

        pmc->core_domain_registered = true;

        return 0;

remove_genpd:
        pm_genpd_remove(genpd);

        return err;
}

static int tegra_powergate_init(struct tegra_pmc *pmc,
                                struct device_node *parent)
{
        struct of_phandle_args child_args, parent_args;
        struct device_node *np, *child;
        int err = 0;

        /*
         * Core power domain is the parent of powergate domains, hence it
         * should be registered first.
         */
        np = of_get_child_by_name(parent, "core-domain");
        if (np) {
                err = tegra_pmc_core_pd_add(pmc, np);
                of_node_put(np);
                if (err)
                        return err;
        }

        np = of_get_child_by_name(parent, "powergates");
        if (!np)
                return 0;

        for_each_child_of_node(np, child) {
                err = tegra_powergate_add(pmc, child);
                if (err < 0) {
                        of_node_put(child);
                        break;
                }

                if (of_parse_phandle_with_args(child, "power-domains",
                                               "#power-domain-cells",
                                               0, &parent_args))
                        continue;

                child_args.np = child;
                child_args.args_count = 0;

                err = of_genpd_add_subdomain(&parent_args, &child_args);
                of_node_put(parent_args.np);
                if (err) {
                        of_node_put(child);
                        break;
                }
        }

        of_node_put(np);

        return err;
}

static void tegra_powergate_remove(struct generic_pm_domain *genpd)
{
        struct tegra_powergate *pg = to_powergate(genpd);

        reset_control_put(pg->reset);

        while (pg->num_clks--)
                clk_put(pg->clks[pg->num_clks]);

        kfree(pg->clks);

        set_bit(pg->id, pmc->powergates_available);

        kfree(pg);
}

static void tegra_powergate_remove_all(struct device_node *parent)
{
        struct generic_pm_domain *genpd;
        struct device_node *np, *child;

        np = of_get_child_by_name(parent, "powergates");
        if (!np)
                return;

        for_each_child_of_node(np, child) {
                of_genpd_del_provider(child);

                genpd = of_genpd_remove_last(child);
                if (IS_ERR(genpd))
                        continue;

                tegra_powergate_remove(genpd);
        }

        of_node_put(np);

        np = of_get_child_by_name(parent, "core-domain");
        if (np) {
                of_genpd_del_provider(np);
                of_genpd_remove_last(np);
        }
}

static const struct tegra_io_pad_soc *
tegra_io_pad_find(struct tegra_pmc *pmc, enum tegra_io_pad id)
{
        unsigned int i;

        for (i = 0; i < pmc->soc->num_io_pads; i++)
                if (pmc->soc->io_pads[i].id == id)
                        return &pmc->soc->io_pads[i];

        return NULL;
}

static int tegra_io_pad_get_dpd_register_bit(struct tegra_pmc *pmc,
                                             enum tegra_io_pad id,
                                             unsigned long *request,
                                             unsigned long *status,
                                             u32 *mask)
{
        const struct tegra_io_pad_soc *pad;

        pad = tegra_io_pad_find(pmc, id);
        if (!pad) {
                dev_err(pmc->dev, "invalid I/O pad ID %u\n", id);
                return -ENOENT;
        }

        if (pad->dpd == UINT_MAX)
                return -ENOTSUPP;

        *mask = BIT(pad->dpd % 32);

        if (pad->dpd < 32) {
                *status = pmc->soc->regs->dpd_status;
                *request = pmc->soc->regs->dpd_req;
        } else {
                *status = pmc->soc->regs->dpd2_status;
                *request = pmc->soc->regs->dpd2_req;
        }

        return 0;
}

static int tegra_io_pad_prepare(struct tegra_pmc *pmc, enum tegra_io_pad id,
                                unsigned long *request, unsigned long *status,
                                u32 *mask)
{
        unsigned long rate, value;
        int err;

        err = tegra_io_pad_get_dpd_register_bit(pmc, id, request, status, mask);
        if (err)
                return err;

        if (pmc->clk) {
                rate = pmc->rate;
                if (!rate) {
                        dev_err(pmc->dev, "failed to get clock rate\n");
                        return -ENODEV;
                }

                tegra_pmc_writel(pmc, DPD_SAMPLE_ENABLE, DPD_SAMPLE);

                /* must be at least 200 ns, in APB (PCLK) clock cycles */
                value = DIV_ROUND_UP(1000000000, rate);
                value = DIV_ROUND_UP(200, value);
                tegra_pmc_writel(pmc, value, SEL_DPD_TIM);
        }

        return 0;
}

static int tegra_io_pad_poll(struct tegra_pmc *pmc, unsigned long offset,
                             u32 mask, u32 val, unsigned long timeout)
{
        u32 value;

        timeout = jiffies + msecs_to_jiffies(timeout);

        while (time_after(timeout, jiffies)) {
                value = tegra_pmc_readl(pmc, offset);
                if ((value & mask) == val)
                        return 0;

                usleep_range(250, 1000);
        }

        return -ETIMEDOUT;
}

static void tegra_io_pad_unprepare(struct tegra_pmc *pmc)
{
        if (pmc->clk)
                tegra_pmc_writel(pmc, DPD_SAMPLE_DISABLE, DPD_SAMPLE);
}

/**
 * tegra_io_pad_power_enable() - enable power to I/O pad
 * @id: Tegra I/O pad ID for which to enable power
 *
 * Returns: 0 on success or a negative error code on failure.
 */
int tegra_io_pad_power_enable(enum tegra_io_pad id)
{
        unsigned long request, status;
        u32 mask;
        int err;

        mutex_lock(&pmc->powergates_lock);

        err = tegra_io_pad_prepare(pmc, id, &request, &status, &mask);
        if (err < 0) {
                dev_err(pmc->dev, "failed to prepare I/O pad: %d\n", err);
                goto unlock;
        }

        tegra_pmc_writel(pmc, IO_DPD_REQ_CODE_OFF | mask, request);

        err = tegra_io_pad_poll(pmc, status, mask, 0, 250);
        if (err < 0) {
                dev_err(pmc->dev, "failed to enable I/O pad: %d\n", err);
                goto unlock;
        }

        tegra_io_pad_unprepare(pmc);

unlock:
        mutex_unlock(&pmc->powergates_lock);
        return err;
}
EXPORT_SYMBOL(tegra_io_pad_power_enable);

/**
 * tegra_io_pad_power_disable() - disable power to I/O pad
 * @id: Tegra I/O pad ID for which to disable power
 *
 * Returns: 0 on success or a negative error code on failure.
 */
int tegra_io_pad_power_disable(enum tegra_io_pad id)
{
        unsigned long request, status;
        u32 mask;
        int err;

        mutex_lock(&pmc->powergates_lock);

        err = tegra_io_pad_prepare(pmc, id, &request, &status, &mask);
        if (err < 0) {
                dev_err(pmc->dev, "failed to prepare I/O pad: %d\n", err);
                goto unlock;
        }

        tegra_pmc_writel(pmc, IO_DPD_REQ_CODE_ON | mask, request);

        err = tegra_io_pad_poll(pmc, status, mask, mask, 250);
        if (err < 0) {
                dev_err(pmc->dev, "failed to disable I/O pad: %d\n", err);
                goto unlock;
        }

        tegra_io_pad_unprepare(pmc);

unlock:
        mutex_unlock(&pmc->powergates_lock);
        return err;
}
EXPORT_SYMBOL(tegra_io_pad_power_disable);

static int tegra_io_pad_is_powered(struct tegra_pmc *pmc, enum tegra_io_pad id)
{
        unsigned long request, status;
        u32 mask, value;
        int err;

        err = tegra_io_pad_get_dpd_register_bit(pmc, id, &request, &status,
                                                &mask);
        if (err)
                return err;

        value = tegra_pmc_readl(pmc, status);

        return !(value & mask);
}

static int tegra_io_pad_set_voltage(struct tegra_pmc *pmc, enum tegra_io_pad id,
                                    int voltage)
{
        const struct tegra_io_pad_soc *pad;
        u32 value;

        pad = tegra_io_pad_find(pmc, id);
        if (!pad)
                return -ENOENT;

        if (pad->voltage == UINT_MAX)
                return -ENOTSUPP;

        mutex_lock(&pmc->powergates_lock);

        if (pmc->soc->has_impl_33v_pwr) {
                value = tegra_pmc_readl(pmc, PMC_IMPL_E_33V_PWR);

                if (voltage == TEGRA_IO_PAD_VOLTAGE_1V8)
                        value &= ~BIT(pad->voltage);
                else
                        value |= BIT(pad->voltage);

                tegra_pmc_writel(pmc, value, PMC_IMPL_E_33V_PWR);
        } else {
                /* write-enable PMC_PWR_DET_VALUE[pad->voltage] */
                value = tegra_pmc_readl(pmc, PMC_PWR_DET);
                value |= BIT(pad->voltage);
                tegra_pmc_writel(pmc, value, PMC_PWR_DET);

                /* update I/O voltage */
                value = tegra_pmc_readl(pmc, PMC_PWR_DET_VALUE);

                if (voltage == TEGRA_IO_PAD_VOLTAGE_1V8)
                        value &= ~BIT(pad->voltage);
                else
                        value |= BIT(pad->voltage);

                tegra_pmc_writel(pmc, value, PMC_PWR_DET_VALUE);
        }

        mutex_unlock(&pmc->powergates_lock);

        usleep_range(100, 250);

        return 0;
}

static int tegra_io_pad_get_voltage(struct tegra_pmc *pmc, enum tegra_io_pad id)
{
        const struct tegra_io_pad_soc *pad;
        u32 value;

        pad = tegra_io_pad_find(pmc, id);
        if (!pad)
                return -ENOENT;

        if (pad->voltage == UINT_MAX)
                return -ENOTSUPP;

        if (pmc->soc->has_impl_33v_pwr)
                value = tegra_pmc_readl(pmc, PMC_IMPL_E_33V_PWR);
        else
                value = tegra_pmc_readl(pmc, PMC_PWR_DET_VALUE);

        if ((value & BIT(pad->voltage)) == 0)
                return TEGRA_IO_PAD_VOLTAGE_1V8;

        return TEGRA_IO_PAD_VOLTAGE_3V3;
}

/**
 * tegra_io_rail_power_on() - enable power to I/O rail
 * @id: Tegra I/O pad ID for which to enable power
 *
 * See also: tegra_io_pad_power_enable()
 */
int tegra_io_rail_power_on(unsigned int id)
{
        return tegra_io_pad_power_enable(id);
}
EXPORT_SYMBOL(tegra_io_rail_power_on);

/**
 * tegra_io_rail_power_off() - disable power to I/O rail
 * @id: Tegra I/O pad ID for which to disable power
 *
 * See also: tegra_io_pad_power_disable()
 */
int tegra_io_rail_power_off(unsigned int id)
{
        return tegra_io_pad_power_disable(id);
}
EXPORT_SYMBOL(tegra_io_rail_power_off);

#ifdef CONFIG_PM_SLEEP
enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
{
        return pmc->suspend_mode;
}

void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
{
        if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
                return;

        pmc->suspend_mode = mode;
}

void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
{
        unsigned long long rate = 0;
        u64 ticks;
        u32 value;

        switch (mode) {
        case TEGRA_SUSPEND_LP1:
                rate = 32768;
                break;

        case TEGRA_SUSPEND_LP2:
                rate = pmc->rate;
                break;

        default:
                break;
        }

        if (WARN_ON_ONCE(rate == 0))
                rate = 100000000;

        ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
        do_div(ticks, USEC_PER_SEC);
        tegra_pmc_writel(pmc, ticks, PMC_CPUPWRGOOD_TIMER);

        ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
        do_div(ticks, USEC_PER_SEC);
        tegra_pmc_writel(pmc, ticks, PMC_CPUPWROFF_TIMER);

        value = tegra_pmc_readl(pmc, PMC_CNTRL);
        value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
        value |= PMC_CNTRL_CPU_PWRREQ_OE;
        tegra_pmc_writel(pmc, value, PMC_CNTRL);
}
#endif

static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
{
        u32 value, values[2];

        if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
                pmc->suspend_mode = TEGRA_SUSPEND_NONE;
        } else {
                switch (value) {
                case 0:
                        pmc->suspend_mode = TEGRA_SUSPEND_LP0;
                        break;

                case 1:
                        pmc->suspend_mode = TEGRA_SUSPEND_LP1;
                        break;

                case 2:
                        pmc->suspend_mode = TEGRA_SUSPEND_LP2;
                        break;

                default:
                        pmc->suspend_mode = TEGRA_SUSPEND_NONE;
                        break;
                }
        }

        pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);

        if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
                pmc->suspend_mode = TEGRA_SUSPEND_NONE;

        pmc->cpu_good_time = value;

        if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
                pmc->suspend_mode = TEGRA_SUSPEND_NONE;

        pmc->cpu_off_time = value;

        if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
                                       values, ARRAY_SIZE(values)))
                pmc->suspend_mode = TEGRA_SUSPEND_NONE;

        pmc->core_osc_time = values[0];
        pmc->core_pmu_time = values[1];

        if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
                pmc->suspend_mode = TEGRA_SUSPEND_NONE;

        pmc->core_off_time = value;

        pmc->corereq_high = of_property_read_bool(np,
                                "nvidia,core-power-req-active-high");

        pmc->sysclkreq_high = of_property_read_bool(np,
                                "nvidia,sys-clock-req-active-high");

        pmc->combined_req = of_property_read_bool(np,
                                "nvidia,combined-power-req");

        pmc->cpu_pwr_good_en = of_property_read_bool(np,
                                "nvidia,cpu-pwr-good-en");

        if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
                                       ARRAY_SIZE(values)))
                if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
                        pmc->suspend_mode = TEGRA_SUSPEND_LP1;

        pmc->lp0_vec_phys = values[0];
        pmc->lp0_vec_size = values[1];

        return 0;
}

static void tegra_pmc_init(struct tegra_pmc *pmc)
{
        if (pmc->soc->init)
                pmc->soc->init(pmc);
}

static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
{
        static const char disabled[] = "emergency thermal reset disabled";
        u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;
        struct device *dev = pmc->dev;
        struct device_node *np;
        u32 value, checksum;

        if (!pmc->soc->has_tsense_reset)
                return;

        np = of_get_child_by_name(pmc->dev->of_node, "i2c-thermtrip");
        if (!np) {
                dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled);
                return;
        }

        if (of_property_read_u32(np, "nvidia,i2c-controller-id", &ctrl_id)) {
                dev_err(dev, "I2C controller ID missing, %s.\n", disabled);
                goto out;
        }

        if (of_property_read_u32(np, "nvidia,bus-addr", &pmu_addr)) {
                dev_err(dev, "nvidia,bus-addr missing, %s.\n", disabled);
                goto out;
        }

        if (of_property_read_u32(np, "nvidia,reg-addr", &reg_addr)) {
                dev_err(dev, "nvidia,reg-addr missing, %s.\n", disabled);
                goto out;
        }

        if (of_property_read_u32(np, "nvidia,reg-data", &reg_data)) {
                dev_err(dev, "nvidia,reg-data missing, %s.\n", disabled);
                goto out;
        }

        if (of_property_read_u32(np, "nvidia,pinmux-id", &pinmux))
                pinmux = 0;

        value = tegra_pmc_readl(pmc, PMC_SENSOR_CTRL);
        value |= PMC_SENSOR_CTRL_SCRATCH_WRITE;
        tegra_pmc_writel(pmc, value, PMC_SENSOR_CTRL);

        value = (reg_data << PMC_SCRATCH54_DATA_SHIFT) |
                (reg_addr << PMC_SCRATCH54_ADDR_SHIFT);
        tegra_pmc_writel(pmc, value, PMC_SCRATCH54);

        value = PMC_SCRATCH55_RESET_TEGRA;
        value |= ctrl_id << PMC_SCRATCH55_CNTRL_ID_SHIFT;
        value |= pinmux << PMC_SCRATCH55_PINMUX_SHIFT;
        value |= pmu_addr << PMC_SCRATCH55_I2CSLV1_SHIFT;

        /*
         * Calculate checksum of SCRATCH54, SCRATCH55 fields. Bits 23:16 will
         * contain the checksum and are currently zero, so they are not added.
         */
        checksum = reg_addr + reg_data + (value & 0xff) + ((value >> 8) & 0xff)
                + ((value >> 24) & 0xff);
        checksum &= 0xff;
        checksum = 0x100 - checksum;

        value |= checksum << PMC_SCRATCH55_CHECKSUM_SHIFT;

        tegra_pmc_writel(pmc, value, PMC_SCRATCH55);

        value = tegra_pmc_readl(pmc, PMC_SENSOR_CTRL);
        value |= PMC_SENSOR_CTRL_ENABLE_RST;
        tegra_pmc_writel(pmc, value, PMC_SENSOR_CTRL);

        dev_info(pmc->dev, "emergency thermal reset enabled\n");

out:
        of_node_put(np);
}

static int tegra_io_pad_pinctrl_get_groups_count(struct pinctrl_dev *pctl_dev)
{
        struct tegra_pmc *pmc = pinctrl_dev_get_drvdata(pctl_dev);

        return pmc->soc->num_io_pads;
}

static const char *tegra_io_pad_pinctrl_get_group_name(struct pinctrl_dev *pctl,
                                                       unsigned int group)
{
        struct tegra_pmc *pmc = pinctrl_dev_get_drvdata(pctl);

        return pmc->soc->io_pads[group].name;
}

static int tegra_io_pad_pinctrl_get_group_pins(struct pinctrl_dev *pctl_dev,
                                               unsigned int group,
                                               const unsigned int **pins,

                                               unsigned int *num_pins)
{
        struct tegra_pmc *pmc = pinctrl_dev_get_drvdata(pctl_dev);

        *pins = &pmc->soc->io_pads[group].id;
        *num_pins = 1;

        return 0;
}

static const struct pinctrl_ops tegra_io_pad_pinctrl_ops = {
        .get_groups_count = tegra_io_pad_pinctrl_get_groups_count,
        .get_group_name = tegra_io_pad_pinctrl_get_group_name,
        .get_group_pins = tegra_io_pad_pinctrl_get_group_pins,
        .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
        .dt_free_map = pinconf_generic_dt_free_map,
};

static int tegra_io_pad_pinconf_get(struct pinctrl_dev *pctl_dev,
                                    unsigned int pin, unsigned long *config)
{
        enum pin_config_param param = pinconf_to_config_param(*config);
        struct tegra_pmc *pmc = pinctrl_dev_get_drvdata(pctl_dev);
        const struct tegra_io_pad_soc *pad;
        int ret;
        u32 arg;

        pad = tegra_io_pad_find(pmc, pin);
        if (!pad)
                return -EINVAL;

        switch (param) {
        case PIN_CONFIG_POWER_SOURCE:
                ret = tegra_io_pad_get_voltage(pmc, pad->id);
                if (ret < 0)
                        return ret;

                arg = ret;
                break;

        case PIN_CONFIG_MODE_LOW_POWER:
                ret = tegra_io_pad_is_powered(pmc, pad->id);
                if (ret < 0)
                        return ret;

                arg = !ret;
                break;

        default:
                return -EINVAL;
        }

        *config = pinconf_to_config_packed(param, arg);

        return 0;
}

static int tegra_io_pad_pinconf_set(struct pinctrl_dev *pctl_dev,
                                    unsigned int pin, unsigned long *configs,
                                    unsigned int num_configs)
{
        struct tegra_pmc *pmc = pinctrl_dev_get_drvdata(pctl_dev);
        const struct tegra_io_pad_soc *pad;
        enum pin_config_param param;
        unsigned int i;
        int err;
        u32 arg;

        pad = tegra_io_pad_find(pmc, pin);
        if (!pad)
                return -EINVAL;

        for (i = 0; i < num_configs; ++i) {
                param = pinconf_to_config_param(configs[i]);
                arg = pinconf_to_config_argument(configs[i]);

                switch (param) {
                case PIN_CONFIG_MODE_LOW_POWER:
                        if (arg)
                                err = tegra_io_pad_power_disable(pad->id);
                        else
                                err = tegra_io_pad_power_enable(pad->id);
                        if (err)
                                return err;
                        break;
                case PIN_CONFIG_POWER_SOURCE:
                        if (arg != TEGRA_IO_PAD_VOLTAGE_1V8 &&
                            arg != TEGRA_IO_PAD_VOLTAGE_3V3)
                                return -EINVAL;
                        err = tegra_io_pad_set_voltage(pmc, pad->id, arg);
                        if (err)
                                return err;
                        break;
                default:
                        return -EINVAL;
                }
        }

        return 0;
}

static const struct pinconf_ops tegra_io_pad_pinconf_ops = {
        .pin_config_get = tegra_io_pad_pinconf_get,
        .pin_config_set = tegra_io_pad_pinconf_set,
        .is_generic = true,
};

static struct pinctrl_desc tegra_pmc_pctl_desc = {
        .pctlops = &tegra_io_pad_pinctrl_ops,
        .confops = &tegra_io_pad_pinconf_ops,
};

static int tegra_pmc_pinctrl_init(struct tegra_pmc *pmc)
{
        int err;

        if (!pmc->soc->num_pin_descs)
                return 0;

        tegra_pmc_pctl_desc.name = dev_name(pmc->dev);
        tegra_pmc_pctl_desc.pins = pmc->soc->pin_descs;
        tegra_pmc_pctl_desc.npins = pmc->soc->num_pin_descs;

        pmc->pctl_dev = devm_pinctrl_register(pmc->dev, &tegra_pmc_pctl_desc,
                                              pmc);
        if (IS_ERR(pmc->pctl_dev)) {
                err = PTR_ERR(pmc->pctl_dev);
                dev_err(pmc->dev, "failed to register pin controller: %d\n",
                        err);
                return err;
        }

        return 0;
}

static ssize_t reset_reason_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
{
        u32 value;

        value = tegra_pmc_readl(pmc, pmc->soc->regs->rst_status);
        value &= pmc->soc->regs->rst_source_mask;
        value >>= pmc->soc->regs->rst_source_shift;

        if (WARN_ON(value >= pmc->soc->num_reset_sources))
                return sprintf(buf, "%s\n", "UNKNOWN");

        return sprintf(buf, "%s\n", pmc->soc->reset_sources[value]);
}

static DEVICE_ATTR_RO(reset_reason);

static ssize_t reset_level_show(struct device *dev,
                                struct device_attribute *attr, char *buf)
{
        u32 value;

        value = tegra_pmc_readl(pmc, pmc->soc->regs->rst_status);
        value &= pmc->soc->regs->rst_level_mask;
        value >>= pmc->soc->regs->rst_level_shift;

        if (WARN_ON(value >= pmc->soc->num_reset_levels))
                return sprintf(buf, "%s\n", "UNKNOWN");

        return sprintf(buf, "%s\n", pmc->soc->reset_levels[value]);
}

static DEVICE_ATTR_RO(reset_level);

static void tegra_pmc_reset_sysfs_init(struct tegra_pmc *pmc)
{
        struct device *dev = pmc->dev;
        int err = 0;

        if (pmc->soc->reset_sources) {
                err = device_create_file(dev, &dev_attr_reset_reason);
                if (err < 0)
                        dev_warn(dev,
                                 "failed to create attr \"reset_reason\": %d\n",
                                 err);
        }

        if (pmc->soc->reset_levels) {
                err = device_create_file(dev, &dev_attr_reset_level);
                if (err < 0)
                        dev_warn(dev,
                                 "failed to create attr \"reset_level\": %d\n",
                                 err);
        }
}

static int tegra_pmc_irq_translate(struct irq_domain *domain,
                                   struct irq_fwspec *fwspec,
                                   unsigned long *hwirq,
                                   unsigned int *type)
{
        if (WARN_ON(fwspec->param_count < 2))
                return -EINVAL;

        *hwirq = fwspec->param[0];
        *type = fwspec->param[1];

        return 0;
}

static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
                               unsigned int num_irqs, void *data)
{
        struct tegra_pmc *pmc = domain->host_data;
        const struct tegra_pmc_soc *soc = pmc->soc;
        struct irq_fwspec *fwspec = data;
        unsigned int i;
        int err = 0;

        if (WARN_ON(num_irqs > 1))
                return -EINVAL;

        for (i = 0; i < soc->num_wake_events; i++) {
                const struct tegra_wake_event *event = &soc->wake_events[i];

                if (fwspec->param_count == 2) {
                        struct irq_fwspec spec;

                        if (event->id != fwspec->param[0])
                                continue;

                        err = irq_domain_set_hwirq_and_chip(domain, virq,
                                                            event->id,
                                                            &pmc->irq, pmc);
                        if (err < 0)
                                break;

                        spec.fwnode = &pmc->dev->of_node->fwnode;
                        spec.param_count = 3;
                        spec.param[0] = GIC_SPI;
                        spec.param[1] = event->irq;
                        spec.param[2] = fwspec->param[1];

                        err = irq_domain_alloc_irqs_parent(domain, virq,
                                                           num_irqs, &spec);

                        break;
                }

                if (fwspec->param_count == 3) {
                        if (event->gpio.instance != fwspec->param[0] ||
                            event->gpio.pin != fwspec->param[1])
                                continue;

                        err = irq_domain_set_hwirq_and_chip(domain, virq,
                                                            event->id,
                                                            &pmc->irq, pmc);

                        /* GPIO hierarchies stop at the PMC level */
                        if (!err && domain->parent)
                                err = irq_domain_disconnect_hierarchy(domain->parent,
                                                                      virq);
                        break;
                }
        }

        /* If there is no wake-up event, there is no PMC mapping */
        if (i == soc->num_wake_events)
                err = irq_domain_disconnect_hierarchy(domain, virq);

        return err;
}

static const struct irq_domain_ops tegra_pmc_irq_domain_ops = {
        .translate = tegra_pmc_irq_translate,
        .alloc = tegra_pmc_irq_alloc,
};

static int tegra210_pmc_irq_set_wake(struct irq_data *data, unsigned int on)
{
        struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
        unsigned int offset, bit;
        u32 value;

        offset = data->hwirq / 32;
        bit = data->hwirq % 32;

        /* clear wake status */
        tegra_pmc_writel(pmc, 0, PMC_SW_WAKE_STATUS);
        tegra_pmc_writel(pmc, 0, PMC_SW_WAKE2_STATUS);

        tegra_pmc_writel(pmc, 0, PMC_WAKE_STATUS);
        tegra_pmc_writel(pmc, 0, PMC_WAKE2_STATUS);

        /* enable PMC wake */
        if (data->hwirq >= 32)
                offset = PMC_WAKE2_MASK;
        else
                offset = PMC_WAKE_MASK;

        value = tegra_pmc_readl(pmc, offset);

        if (on)
                value |= BIT(bit);
        else
                value &= ~BIT(bit);

        tegra_pmc_writel(pmc, value, offset);

        return 0;
}

static int tegra210_pmc_irq_set_type(struct irq_data *data, unsigned int type)
{
        struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
        unsigned int offset, bit;
        u32 value;

        offset = data->hwirq / 32;
        bit = data->hwirq % 32;

        if (data->hwirq >= 32)
                offset = PMC_WAKE2_LEVEL;
        else
                offset = PMC_WAKE_LEVEL;

        value = tegra_pmc_readl(pmc, offset);

        switch (type) {
        case IRQ_TYPE_EDGE_RISING:
        case IRQ_TYPE_LEVEL_HIGH:
                value |= BIT(bit);
                break;

        case IRQ_TYPE_EDGE_FALLING:
        case IRQ_TYPE_LEVEL_LOW:
                value &= ~BIT(bit);
                break;

        case IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING:
                value ^= BIT(bit);
                break;

        default:
                return -EINVAL;
        }

        tegra_pmc_writel(pmc, value, offset);

        return 0;
}

static int tegra186_pmc_irq_set_wake(struct irq_data *data, unsigned int on)
{
        struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
        unsigned int offset, bit;
        u32 value;

        offset = data->hwirq / 32;
        bit = data->hwirq % 32;

        /* clear wake status */
        writel(0x1, pmc->wake + WAKE_AOWAKE_STATUS_W(data->hwirq));

        /* route wake to tier 2 */
        value = readl(pmc->wake + WAKE_AOWAKE_TIER2_ROUTING(offset));

        if (!on)
                value &= ~(1 << bit);
        else
                value |= 1 << bit;

        writel(value, pmc->wake + WAKE_AOWAKE_TIER2_ROUTING(offset));

        /* enable wakeup event */
        writel(!!on, pmc->wake + WAKE_AOWAKE_MASK_W(data->hwirq));

        return 0;
}

static int tegra186_pmc_irq_set_type(struct irq_data *data, unsigned int type)
{
        struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
        u32 value;

        value = readl(pmc->wake + WAKE_AOWAKE_CNTRL(data->hwirq));

        switch (type) {
        case IRQ_TYPE_EDGE_RISING:
        case IRQ_TYPE_LEVEL_HIGH:
                value |= WAKE_AOWAKE_CNTRL_LEVEL;
                break;

        case IRQ_TYPE_EDGE_FALLING:
        case IRQ_TYPE_LEVEL_LOW:
                value &= ~WAKE_AOWAKE_CNTRL_LEVEL;
                break;

        case IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING:
                value ^= WAKE_AOWAKE_CNTRL_LEVEL;
                break;

        default:
                return -EINVAL;
        }

        writel(value, pmc->wake + WAKE_AOWAKE_CNTRL(data->hwirq));

        return 0;
}

static void tegra_irq_mask_parent(struct irq_data *data)
{
        if (data->parent_data)
                irq_chip_mask_parent(data);
}

static void tegra_irq_unmask_parent(struct irq_data *data)
{
        if (data->parent_data)
                irq_chip_unmask_parent(data);
}

static void tegra_irq_eoi_parent(struct irq_data *data)
{
        if (data->parent_data)
                irq_chip_eoi_parent(data);
}

static int tegra_irq_set_affinity_parent(struct irq_data *data,
                                         const struct cpumask *dest,
                                         bool force)
{
        if (data->parent_data)
                return irq_chip_set_affinity_parent(data, dest, force);

        return -EINVAL;
}

static int tegra_pmc_irq_init(struct tegra_pmc *pmc)
{
        struct irq_domain *parent = NULL;
        struct device_node *np;

        np = of_irq_find_parent(pmc->dev->of_node);
        if (np) {
                parent = irq_find_host(np);
                of_node_put(np);
        }

        if (!parent)
                return 0;

        pmc->irq.name = dev_name(pmc->dev);
        pmc->irq.irq_mask = tegra_irq_mask_parent;
        pmc->irq.irq_unmask = tegra_irq_unmask_parent;
        pmc->irq.irq_eoi = tegra_irq_eoi_parent;
        pmc->irq.irq_set_affinity = tegra_irq_set_affinity_parent;
        pmc->irq.irq_set_type = pmc->soc->irq_set_type;
        pmc->irq.irq_set_wake = pmc->soc->irq_set_wake;

        pmc->domain = irq_domain_add_hierarchy(parent, 0, 96, pmc->dev->of_node,
                                               &tegra_pmc_irq_domain_ops, pmc);
        if (!pmc->domain) {
                dev_err(pmc->dev, "failed to allocate domain\n");
                return -ENOMEM;
        }

        return 0;
}

static int tegra_pmc_clk_notify_cb(struct notifier_block *nb,
                                   unsigned long action, void *ptr)
{
        struct tegra_pmc *pmc = container_of(nb, struct tegra_pmc, clk_nb);
        struct clk_notifier_data *data = ptr;

        switch (action) {
        case PRE_RATE_CHANGE:
                mutex_lock(&pmc->powergates_lock);
                break;

        case POST_RATE_CHANGE:
                pmc->rate = data->new_rate;
                fallthrough;

        case ABORT_RATE_CHANGE:
                mutex_unlock(&pmc->powergates_lock);
                break;

        default:
                WARN_ON_ONCE(1);
                return notifier_from_errno(-EINVAL);
        }

        return NOTIFY_OK;
}

static void pmc_clk_fence_udelay(u32 offset)
{
        tegra_pmc_readl(pmc, offset);
        /* pmc clk propagation delay 2 us */
        udelay(2);
}

static u8 pmc_clk_mux_get_parent(struct clk_hw *hw)
{
        struct pmc_clk *clk = to_pmc_clk(hw);
        u32 val;

        val = tegra_pmc_readl(pmc, clk->offs) >> clk->mux_shift;
        val &= PMC_CLK_OUT_MUX_MASK;

        return val;
}

static int pmc_clk_mux_set_parent(struct clk_hw *hw, u8 index)
{
        struct pmc_clk *clk = to_pmc_clk(hw);
        u32 val;

        val = tegra_pmc_readl(pmc, clk->offs);
        val &= ~(PMC_CLK_OUT_MUX_MASK << clk->mux_shift);
        val |= index << clk->mux_shift;
        tegra_pmc_writel(pmc, val, clk->offs);
        pmc_clk_fence_udelay(clk->offs);

        return 0;
}

static int pmc_clk_is_enabled(struct clk_hw *hw)
{
        struct pmc_clk *clk = to_pmc_clk(hw);
        u32 val;

        val = tegra_pmc_readl(pmc, clk->offs) & BIT(clk->force_en_shift);

        return val ? 1 : 0;
}

static void pmc_clk_set_state(unsigned long offs, u32 shift, int state)
{
        u32 val;

        val = tegra_pmc_readl(pmc, offs);
        val = state ? (val | BIT(shift)) : (val & ~BIT(shift));
        tegra_pmc_writel(pmc, val, offs);
        pmc_clk_fence_udelay(offs);
}

static int pmc_clk_enable(struct clk_hw *hw)
{
        struct pmc_clk *clk = to_pmc_clk(hw);

        pmc_clk_set_state(clk->offs, clk->force_en_shift, 1);

        return 0;
}

static void pmc_clk_disable(struct clk_hw *hw)
{
        struct pmc_clk *clk = to_pmc_clk(hw);

        pmc_clk_set_state(clk->offs, clk->force_en_shift, 0);
}

static const struct clk_ops pmc_clk_ops = {
        .get_parent = pmc_clk_mux_get_parent,
        .set_parent = pmc_clk_mux_set_parent,
        .determine_rate = __clk_mux_determine_rate,
        .is_enabled = pmc_clk_is_enabled,
        .enable = pmc_clk_enable,
        .disable = pmc_clk_disable,
};

static struct clk *
tegra_pmc_clk_out_register(struct tegra_pmc *pmc,
                           const struct pmc_clk_init_data *data,
                           unsigned long offset)
{
        struct clk_init_data init;
        struct pmc_clk *pmc_clk;

        pmc_clk = devm_kzalloc(pmc->dev, sizeof(*pmc_clk), GFP_KERNEL);
        if (!pmc_clk)
                return ERR_PTR(-ENOMEM);

        init.name = data->name;
        init.ops = &pmc_clk_ops;
        init.parent_names = data->parents;
        init.num_parents = data->num_parents;
        init.flags = CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT |
                     CLK_SET_PARENT_GATE;

        pmc_clk->hw.init = &init;
        pmc_clk->offs = offset;
        pmc_clk->mux_shift = data->mux_shift;
        pmc_clk->force_en_shift = data->force_en_shift;

        return clk_register(NULL, &pmc_clk->hw);
}

static int pmc_clk_gate_is_enabled(struct clk_hw *hw)
{
        struct pmc_clk_gate *gate = to_pmc_clk_gate(hw);

        return tegra_pmc_readl(pmc, gate->offs) & BIT(gate->shift) ? 1 : 0;
}

static int pmc_clk_gate_enable(struct clk_hw *hw)
{
        struct pmc_clk_gate *gate = to_pmc_clk_gate(hw);

        pmc_clk_set_state(gate->offs, gate->shift, 1);

        return 0;
}

static void pmc_clk_gate_disable(struct clk_hw *hw)
{
        struct pmc_clk_gate *gate = to_pmc_clk_gate(hw);

        pmc_clk_set_state(gate->offs, gate->shift, 0);
}

static const struct clk_ops pmc_clk_gate_ops = {
        .is_enabled = pmc_clk_gate_is_enabled,
        .enable = pmc_clk_gate_enable,
        .disable = pmc_clk_gate_disable,
};

static struct clk *
tegra_pmc_clk_gate_register(struct tegra_pmc *pmc, const char *name,
                            const char *parent_name, unsigned long offset,
                            u32 shift)
{
        struct clk_init_data init;
        struct pmc_clk_gate *gate;

        gate = devm_kzalloc(pmc->dev, sizeof(*gate), GFP_KERNEL);
        if (!gate)
                return ERR_PTR(-ENOMEM);

        init.name = name;
        init.ops = &pmc_clk_gate_ops;
        init.parent_names = &parent_name;
        init.num_parents = 1;
        init.flags = 0;

        gate->hw.init = &init;
        gate->offs = offset;
        gate->shift = shift;

        return clk_register(NULL, &gate->hw);
}

static void tegra_pmc_clock_register(struct tegra_pmc *pmc,
                                     struct device_node *np)
{
        struct clk *clk;
        struct clk_onecell_data *clk_data;
        unsigned int num_clks;
        int i, err;

        num_clks = pmc->soc->num_pmc_clks;
        if (pmc->soc->has_blink_output)
                num_clks += 1;

        if (!num_clks)
                return;

        clk_data = devm_kmalloc(pmc->dev, sizeof(*clk_data), GFP_KERNEL);
        if (!clk_data)
                return;

        clk_data->clks = devm_kcalloc(pmc->dev, TEGRA_PMC_CLK_MAX,
                                      sizeof(*clk_data->clks), GFP_KERNEL);
        if (!clk_data->clks)
                return;

        clk_data->clk_num = TEGRA_PMC_CLK_MAX;

        for (i = 0; i < TEGRA_PMC_CLK_MAX; i++)
                clk_data->clks[i] = ERR_PTR(-ENOENT);

        for (i = 0; i < pmc->soc->num_pmc_clks; i++) {
                const struct pmc_clk_init_data *data;

                data = pmc->soc->pmc_clks_data + i;

                clk = tegra_pmc_clk_out_register(pmc, data, PMC_CLK_OUT_CNTRL);
                if (IS_ERR(clk)) {
                        dev_warn(pmc->dev, "unable to register clock %s: %d\n",
                                 data->name, PTR_ERR_OR_ZERO(clk));
                        return;
                }

                err = clk_register_clkdev(clk, data->name, NULL);
                if (err) {
                        dev_warn(pmc->dev,
                                 "unable to register %s clock lookup: %d\n",
                                 data->name, err);
                        return;
                }

                clk_data->clks[data->clk_id] = clk;
        }

        if (pmc->soc->has_blink_output) {
                tegra_pmc_writel(pmc, 0x0, PMC_BLINK_TIMER);
                clk = tegra_pmc_clk_gate_register(pmc,
                                                  "pmc_blink_override",
                                                  "clk_32k",
                                                  PMC_DPD_PADS_ORIDE,
                                                  PMC_DPD_PADS_ORIDE_BLINK);
                if (IS_ERR(clk)) {
                        dev_warn(pmc->dev,
                                 "unable to register pmc_blink_override: %d\n",
                                 PTR_ERR_OR_ZERO(clk));
                        return;
                }

                clk = tegra_pmc_clk_gate_register(pmc, "pmc_blink",
                                                  "pmc_blink_override",
                                                  PMC_CNTRL,
                                                  PMC_CNTRL_BLINK_EN);
                if (IS_ERR(clk)) {
                        dev_warn(pmc->dev,
                                 "unable to register pmc_blink: %d\n",
                                 PTR_ERR_OR_ZERO(clk));
                        return;
                }

                err = clk_register_clkdev(clk, "pmc_blink", NULL);
                if (err) {
                        dev_warn(pmc->dev,
                                 "unable to register pmc_blink lookup: %d\n",
                                 err);
                        return;
                }

                clk_data->clks[TEGRA_PMC_CLK_BLINK] = clk;
        }

        err = of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
        if (err)
                dev_warn(pmc->dev, "failed to add pmc clock provider: %d\n",
                         err);
}

static const struct regmap_range pmc_usb_sleepwalk_ranges[] = {
        regmap_reg_range(PMC_USB_DEBOUNCE_DEL, PMC_USB_AO),
        regmap_reg_range(PMC_UTMIP_UHSIC_TRIGGERS, PMC_UTMIP_UHSIC_SAVED_STATE),
        regmap_reg_range(PMC_UTMIP_TERM_PAD_CFG, PMC_UTMIP_UHSIC_FAKE),
        regmap_reg_range(PMC_UTMIP_UHSIC_LINE_WAKEUP, PMC_UTMIP_UHSIC_LINE_WAKEUP),
        regmap_reg_range(PMC_UTMIP_BIAS_MASTER_CNTRL, PMC_UTMIP_MASTER_CONFIG),
        regmap_reg_range(PMC_UTMIP_UHSIC2_TRIGGERS, PMC_UTMIP_MASTER2_CONFIG),
        regmap_reg_range(PMC_UTMIP_PAD_CFG0, PMC_UTMIP_UHSIC_SLEEP_CFG1),
        regmap_reg_range(PMC_UTMIP_SLEEPWALK_P3, PMC_UTMIP_SLEEPWALK_P3),
};

static const struct regmap_access_table pmc_usb_sleepwalk_table = {
        .yes_ranges = pmc_usb_sleepwalk_ranges,
        .n_yes_ranges = ARRAY_SIZE(pmc_usb_sleepwalk_ranges),
};

static int tegra_pmc_regmap_readl(void *context, unsigned int offset, unsigned int *value)
{
        struct tegra_pmc *pmc = context;

        *value = tegra_pmc_readl(pmc, offset);
        return 0;
}

static int tegra_pmc_regmap_writel(void *context, unsigned int offset, unsigned int value)
{
        struct tegra_pmc *pmc = context;

        tegra_pmc_writel(pmc, value, offset);
        return 0;
}

static const struct regmap_config usb_sleepwalk_regmap_config = {
        .name = "usb_sleepwalk",
        .reg_bits = 32,
        .val_bits = 32,
        .reg_stride = 4,
        .fast_io = true,
        .rd_table = &pmc_usb_sleepwalk_table,
        .wr_table = &pmc_usb_sleepwalk_table,
        .reg_read = tegra_pmc_regmap_readl,
        .reg_write = tegra_pmc_regmap_writel,
};

static int tegra_pmc_regmap_init(struct tegra_pmc *pmc)
{
        struct regmap *regmap;
        int err;

        if (pmc->soc->has_usb_sleepwalk) {
                regmap = devm_regmap_init(pmc->dev, NULL, pmc, &usb_sleepwalk_regmap_config);
                if (IS_ERR(regmap)) {
                        err = PTR_ERR(regmap);
                        dev_err(pmc->dev, "failed to allocate register map (%d)\n", err);
                        return err;
                }
        }

        return 0;
}

static void tegra_pmc_reset_suspend_mode(void *data)
{
        pmc->suspend_mode = TEGRA_SUSPEND_NOT_READY;
}

static int tegra_pmc_probe(struct platform_device *pdev)
{
        void __iomem *base;
        struct resource *res;
        int err;

        /*
         * Early initialisation should have configured an initial
         * register mapping and setup the soc data pointer. If these
         * are not valid then something went badly wrong!
         */
        if (WARN_ON(!pmc->base || !pmc->soc))
                return -ENODEV;

        err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
        if (err < 0)
                return err;

        err = devm_add_action_or_reset(&pdev->dev, tegra_pmc_reset_suspend_mode,
                                       NULL);
        if (err)
                return err;

        /* take over the memory region from the early initialization */
        base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(base))
                return PTR_ERR(base);

        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake");
        if (res) {
                pmc->wake = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(pmc->wake))
                        return PTR_ERR(pmc->wake);
        } else {
                pmc->wake = base;
        }

        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag");
        if (res) {
                pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(pmc->aotag))
                        return PTR_ERR(pmc->aotag);
        } else {
                pmc->aotag = base;
        }

        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch");
        if (res) {
                pmc->scratch = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(pmc->scratch))
                        return PTR_ERR(pmc->scratch);
        } else {
                pmc->scratch = base;
        }

        pmc->clk = devm_clk_get(&pdev->dev, "pclk");
        if (IS_ERR(pmc->clk)) {
                err = PTR_ERR(pmc->clk);

                if (err != -ENOENT) {
                        dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
                        return err;
                }

                pmc->clk = NULL;
        }

        /*
         * PCLK clock rate can't be retrieved using CLK API because it
         * causes lockup if CPU enters LP2 idle state from some other
         * CLK notifier, hence we're caching the rate's value locally.
         */
        if (pmc->clk) {
                pmc->clk_nb.notifier_call = tegra_pmc_clk_notify_cb;
                err = clk_notifier_register(pmc->clk, &pmc->clk_nb);
                if (err) {
                        dev_err(&pdev->dev,
                                "failed to register clk notifier\n");
                        return err;
                }

                pmc->rate = clk_get_rate(pmc->clk);
        }

        pmc->dev = &pdev->dev;

        tegra_pmc_init(pmc);

        tegra_pmc_init_tsense_reset(pmc);

        tegra_pmc_reset_sysfs_init(pmc);

        if (IS_ENABLED(CONFIG_DEBUG_FS)) {
                err = tegra_powergate_debugfs_init();
                if (err < 0)
                        goto cleanup_sysfs;
        }

        err = devm_register_reboot_notifier(&pdev->dev,
                                            &tegra_pmc_reboot_notifier);
        if (err) {
                dev_err(&pdev->dev, "unable to register reboot notifier, %d\n",
                        err);
                goto cleanup_debugfs;
        }

        err = register_restart_handler(&tegra_pmc_restart_handler);
        if (err) {
                dev_err(&pdev->dev, "unable to register restart handler, %d\n",
                        err);
                goto cleanup_debugfs;
        }

        err = tegra_pmc_pinctrl_init(pmc);
        if (err)
                goto cleanup_restart_handler;

        err = tegra_pmc_regmap_init(pmc);
        if (err < 0)
                goto cleanup_restart_handler;

        err = tegra_powergate_init(pmc, pdev->dev.of_node);
        if (err < 0)
                goto cleanup_powergates;

        err = tegra_pmc_irq_init(pmc);
        if (err < 0)
                goto cleanup_powergates;

        mutex_lock(&pmc->powergates_lock);
        iounmap(pmc->base);
        pmc->base = base;
        mutex_unlock(&pmc->powergates_lock);

        tegra_pmc_clock_register(pmc, pdev->dev.of_node);
        platform_set_drvdata(pdev, pmc);
        tegra_pm_init_suspend();

        return 0;

cleanup_powergates:
        tegra_powergate_remove_all(pdev->dev.of_node);
cleanup_restart_handler:
        unregister_restart_handler(&tegra_pmc_restart_handler);
cleanup_debugfs:
        debugfs_remove(pmc->debugfs);
cleanup_sysfs:
        device_remove_file(&pdev->dev, &dev_attr_reset_reason);
        device_remove_file(&pdev->dev, &dev_attr_reset_level);
        clk_notifier_unregister(pmc->clk, &pmc->clk_nb);

        return err;
}

#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
static int tegra_pmc_suspend(struct device *dev)
{
        struct tegra_pmc *pmc = dev_get_drvdata(dev);

        tegra_pmc_writel(pmc, virt_to_phys(tegra_resume), PMC_SCRATCH41);

        return 0;
}

static int tegra_pmc_resume(struct device *dev)
{
        struct tegra_pmc *pmc = dev_get_drvdata(dev);

        tegra_pmc_writel(pmc, 0x0, PMC_SCRATCH41);

        return 0;
}

static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);

#endif

static const char * const tegra20_powergates[] = {
        [TEGRA_POWERGATE_CPU] = "cpu",
        [TEGRA_POWERGATE_3D] = "td",
        [TEGRA_POWERGATE_VENC] = "venc",
        [TEGRA_POWERGATE_VDEC] = "vdec",
        [TEGRA_POWERGATE_PCIE] = "pcie",
        [TEGRA_POWERGATE_L2] = "l2",
        [TEGRA_POWERGATE_MPE] = "mpe",
};

static const struct tegra_pmc_regs tegra20_pmc_regs = {
        .scratch0 = 0x50,

        .dpd_req = 0x1b8,
        .dpd_status = 0x1bc,
        .dpd2_req = 0x1c0,
        .dpd2_status = 0x1c4,
        .rst_status = 0x1b4,
        .rst_source_shift = 0x0,
        .rst_source_mask = 0x7,
        .rst_level_shift = 0x0,
        .rst_level_mask = 0x0,
};

static void tegra20_pmc_init(struct tegra_pmc *pmc)
{
        u32 value, osc, pmu, off;

        /* Always enable CPU power request */
        value = tegra_pmc_readl(pmc, PMC_CNTRL);
        value |= PMC_CNTRL_CPU_PWRREQ_OE;
        tegra_pmc_writel(pmc, value, PMC_CNTRL);

        value = tegra_pmc_readl(pmc, PMC_CNTRL);

        if (pmc->sysclkreq_high)
                value &= ~PMC_CNTRL_SYSCLK_POLARITY;
        else
                value |= PMC_CNTRL_SYSCLK_POLARITY;

        if (pmc->corereq_high)
                value &= ~PMC_CNTRL_PWRREQ_POLARITY;
        else
                value |= PMC_CNTRL_PWRREQ_POLARITY;

        /* configure the output polarity while the request is tristated */
        tegra_pmc_writel(pmc, value, PMC_CNTRL);

        /* now enable the request */
        value = tegra_pmc_readl(pmc, PMC_CNTRL);
        value |= PMC_CNTRL_SYSCLK_OE;
        tegra_pmc_writel(pmc, value, PMC_CNTRL);

        /* program core timings which are applicable only for suspend state */
        if (pmc->suspend_mode != TEGRA_SUSPEND_NONE) {
                osc = DIV_ROUND_UP(pmc->core_osc_time * 8192, 1000000);
                pmu = DIV_ROUND_UP(pmc->core_pmu_time * 32768, 1000000);
                off = DIV_ROUND_UP(pmc->core_off_time * 32768, 1000000);
                tegra_pmc_writel(pmc, ((osc << 8) & 0xff00) | (pmu & 0xff),
                                 PMC_COREPWRGOOD_TIMER);
                tegra_pmc_writel(pmc, off, PMC_COREPWROFF_TIMER);
        }
}

static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
                                           struct device_node *np,
                                           bool invert)
{
        u32 value;

        value = tegra_pmc_readl(pmc, PMC_CNTRL);

        if (invert)
                value |= PMC_CNTRL_INTR_POLARITY;
        else
                value &= ~PMC_CNTRL_INTR_POLARITY;

        tegra_pmc_writel(pmc, value, PMC_CNTRL);
}

static const struct tegra_pmc_soc tegra20_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = ARRAY_SIZE(tegra20_powergates),
        .powergates = tegra20_powergates,
        .num_cpu_powergates = 0,
        .cpu_powergates = NULL,
        .has_tsense_reset = false,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = false,
        .maybe_tz_only = false,
        .num_io_pads = 0,
        .io_pads = NULL,
        .num_pin_descs = 0,
        .pin_descs = NULL,
        .regs = &tegra20_pmc_regs,
        .init = tegra20_pmc_init,
        .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
        .powergate_set = tegra20_powergate_set,
        .reset_sources = NULL,
        .num_reset_sources = 0,
        .reset_levels = NULL,
        .num_reset_levels = 0,
        .pmc_clks_data = NULL,
        .num_pmc_clks = 0,
        .has_blink_output = true,
        .has_usb_sleepwalk = true,
};

static const char * const tegra30_powergates[] = {
        [TEGRA_POWERGATE_CPU] = "cpu0",
        [TEGRA_POWERGATE_3D] = "td",
        [TEGRA_POWERGATE_VENC] = "venc",
        [TEGRA_POWERGATE_VDEC] = "vdec",
        [TEGRA_POWERGATE_PCIE] = "pcie",
        [TEGRA_POWERGATE_L2] = "l2",
        [TEGRA_POWERGATE_MPE] = "mpe",
        [TEGRA_POWERGATE_HEG] = "heg",
        [TEGRA_POWERGATE_SATA] = "sata",
        [TEGRA_POWERGATE_CPU1] = "cpu1",
        [TEGRA_POWERGATE_CPU2] = "cpu2",
        [TEGRA_POWERGATE_CPU3] = "cpu3",
        [TEGRA_POWERGATE_CELP] = "celp",
        [TEGRA_POWERGATE_3D1] = "td2",
};

static const u8 tegra30_cpu_powergates[] = {
        TEGRA_POWERGATE_CPU,
        TEGRA_POWERGATE_CPU1,
        TEGRA_POWERGATE_CPU2,
        TEGRA_POWERGATE_CPU3,
};

static const char * const tegra30_reset_sources[] = {
        "POWER_ON_RESET",
        "WATCHDOG",
        "SENSOR",
        "SW_MAIN",
        "LP0"
};

static const struct tegra_pmc_soc tegra30_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = ARRAY_SIZE(tegra30_powergates),
        .powergates = tegra30_powergates,
        .num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
        .cpu_powergates = tegra30_cpu_powergates,
        .has_tsense_reset = true,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = false,
        .maybe_tz_only = false,
        .num_io_pads = 0,
        .io_pads = NULL,
        .num_pin_descs = 0,
        .pin_descs = NULL,
        .regs = &tegra20_pmc_regs,
        .init = tegra20_pmc_init,
        .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
        .powergate_set = tegra20_powergate_set,
        .reset_sources = tegra30_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources),
        .reset_levels = NULL,
        .num_reset_levels = 0,
        .pmc_clks_data = tegra_pmc_clks_data,
        .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data),
        .has_blink_output = true,
        .has_usb_sleepwalk = true,
};

static const char * const tegra114_powergates[] = {
        [TEGRA_POWERGATE_CPU] = "crail",
        [TEGRA_POWERGATE_3D] = "td",
        [TEGRA_POWERGATE_VENC] = "venc",
        [TEGRA_POWERGATE_VDEC] = "vdec",
        [TEGRA_POWERGATE_MPE] = "mpe",
        [TEGRA_POWERGATE_HEG] = "heg",
        [TEGRA_POWERGATE_CPU1] = "cpu1",
        [TEGRA_POWERGATE_CPU2] = "cpu2",
        [TEGRA_POWERGATE_CPU3] = "cpu3",
        [TEGRA_POWERGATE_CELP] = "celp",
        [TEGRA_POWERGATE_CPU0] = "cpu0",
        [TEGRA_POWERGATE_C0NC] = "c0nc",
        [TEGRA_POWERGATE_C1NC] = "c1nc",
        [TEGRA_POWERGATE_DIS] = "dis",
        [TEGRA_POWERGATE_DISB] = "disb",
        [TEGRA_POWERGATE_XUSBA] = "xusba",
        [TEGRA_POWERGATE_XUSBB] = "xusbb",
        [TEGRA_POWERGATE_XUSBC] = "xusbc",
};

static const u8 tegra114_cpu_powergates[] = {
        TEGRA_POWERGATE_CPU0,
        TEGRA_POWERGATE_CPU1,
        TEGRA_POWERGATE_CPU2,
        TEGRA_POWERGATE_CPU3,
};

static const struct tegra_pmc_soc tegra114_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = ARRAY_SIZE(tegra114_powergates),
        .powergates = tegra114_powergates,
        .num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
        .cpu_powergates = tegra114_cpu_powergates,
        .has_tsense_reset = true,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = false,
        .maybe_tz_only = false,
        .num_io_pads = 0,
        .io_pads = NULL,
        .num_pin_descs = 0,
        .pin_descs = NULL,
        .regs = &tegra20_pmc_regs,
        .init = tegra20_pmc_init,
        .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
        .powergate_set = tegra114_powergate_set,
        .reset_sources = tegra30_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources),
        .reset_levels = NULL,
        .num_reset_levels = 0,
        .pmc_clks_data = tegra_pmc_clks_data,
        .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data),
        .has_blink_output = true,
        .has_usb_sleepwalk = true,
};

static const char * const tegra124_powergates[] = {
        [TEGRA_POWERGATE_CPU] = "crail",
        [TEGRA_POWERGATE_3D] = "3d",
        [TEGRA_POWERGATE_VENC] = "venc",
        [TEGRA_POWERGATE_PCIE] = "pcie",
        [TEGRA_POWERGATE_VDEC] = "vdec",
        [TEGRA_POWERGATE_MPE] = "mpe",
        [TEGRA_POWERGATE_HEG] = "heg",
        [TEGRA_POWERGATE_SATA] = "sata",
        [TEGRA_POWERGATE_CPU1] = "cpu1",
        [TEGRA_POWERGATE_CPU2] = "cpu2",
        [TEGRA_POWERGATE_CPU3] = "cpu3",
        [TEGRA_POWERGATE_CELP] = "celp",
        [TEGRA_POWERGATE_CPU0] = "cpu0",
        [TEGRA_POWERGATE_C0NC] = "c0nc",
        [TEGRA_POWERGATE_C1NC] = "c1nc",
        [TEGRA_POWERGATE_SOR] = "sor",
        [TEGRA_POWERGATE_DIS] = "dis",
        [TEGRA_POWERGATE_DISB] = "disb",
        [TEGRA_POWERGATE_XUSBA] = "xusba",
        [TEGRA_POWERGATE_XUSBB] = "xusbb",
        [TEGRA_POWERGATE_XUSBC] = "xusbc",
        [TEGRA_POWERGATE_VIC] = "vic",
        [TEGRA_POWERGATE_IRAM] = "iram",
};

static const u8 tegra124_cpu_powergates[] = {
        TEGRA_POWERGATE_CPU0,
        TEGRA_POWERGATE_CPU1,
        TEGRA_POWERGATE_CPU2,
        TEGRA_POWERGATE_CPU3,
};

#define TEGRA_IO_PAD(_id, _dpd, _voltage, _name)        \
        ((struct tegra_io_pad_soc) {                    \
                .id     = (_id),                        \
                .dpd    = (_dpd),                       \
                .voltage = (_voltage),                  \
                .name   = (_name),                      \
        })

#define TEGRA_IO_PIN_DESC(_id, _dpd, _voltage, _name)   \
        ((struct pinctrl_pin_desc) {                    \
                .number = (_id),                        \
                .name   = (_name)                       \
        })

#define TEGRA124_IO_PAD_TABLE(_pad)                                   \
        /* .id                          .dpd  .voltage  .name */      \
        _pad(TEGRA_IO_PAD_AUDIO,        17,   UINT_MAX, "audio"),     \
        _pad(TEGRA_IO_PAD_BB,           15,   UINT_MAX, "bb"),        \
        _pad(TEGRA_IO_PAD_CAM,          36,   UINT_MAX, "cam"),       \
        _pad(TEGRA_IO_PAD_COMP,         22,   UINT_MAX, "comp"),      \
        _pad(TEGRA_IO_PAD_CSIA,         0,    UINT_MAX, "csia"),      \
        _pad(TEGRA_IO_PAD_CSIB,         1,    UINT_MAX, "csb"),       \
        _pad(TEGRA_IO_PAD_CSIE,         44,   UINT_MAX, "cse"),       \
        _pad(TEGRA_IO_PAD_DSI,          2,    UINT_MAX, "dsi"),       \
        _pad(TEGRA_IO_PAD_DSIB,         39,   UINT_MAX, "dsib"),      \
        _pad(TEGRA_IO_PAD_DSIC,         40,   UINT_MAX, "dsic"),      \
        _pad(TEGRA_IO_PAD_DSID,         41,   UINT_MAX, "dsid"),      \
        _pad(TEGRA_IO_PAD_HDMI,         28,   UINT_MAX, "hdmi"),      \
        _pad(TEGRA_IO_PAD_HSIC,         19,   UINT_MAX, "hsic"),      \
        _pad(TEGRA_IO_PAD_HV,           38,   UINT_MAX, "hv"),        \
        _pad(TEGRA_IO_PAD_LVDS,         57,   UINT_MAX, "lvds"),      \
        _pad(TEGRA_IO_PAD_MIPI_BIAS,    3,    UINT_MAX, "mipi-bias"), \
        _pad(TEGRA_IO_PAD_NAND,         13,   UINT_MAX, "nand"),      \
        _pad(TEGRA_IO_PAD_PEX_BIAS,     4,    UINT_MAX, "pex-bias"),  \
        _pad(TEGRA_IO_PAD_PEX_CLK1,     5,    UINT_MAX, "pex-clk1"),  \
        _pad(TEGRA_IO_PAD_PEX_CLK2,     6,    UINT_MAX, "pex-clk2"),  \
        _pad(TEGRA_IO_PAD_PEX_CNTRL,    32,   UINT_MAX, "pex-cntrl"), \
        _pad(TEGRA_IO_PAD_SDMMC1,       33,   UINT_MAX, "sdmmc1"),    \
        _pad(TEGRA_IO_PAD_SDMMC3,       34,   UINT_MAX, "sdmmc3"),    \
        _pad(TEGRA_IO_PAD_SDMMC4,       35,   UINT_MAX, "sdmmc4"),    \
        _pad(TEGRA_IO_PAD_SYS_DDC,      58,   UINT_MAX, "sys_ddc"),   \
        _pad(TEGRA_IO_PAD_UART,         14,   UINT_MAX, "uart"),      \
        _pad(TEGRA_IO_PAD_USB0,         9,    UINT_MAX, "usb0"),      \
        _pad(TEGRA_IO_PAD_USB1,         10,   UINT_MAX, "usb1"),      \
        _pad(TEGRA_IO_PAD_USB2,         11,   UINT_MAX, "usb2"),      \
        _pad(TEGRA_IO_PAD_USB_BIAS,     12,   UINT_MAX, "usb_bias")

static const struct tegra_io_pad_soc tegra124_io_pads[] = {
        TEGRA124_IO_PAD_TABLE(TEGRA_IO_PAD)
};

static const struct pinctrl_pin_desc tegra124_pin_descs[] = {
        TEGRA124_IO_PAD_TABLE(TEGRA_IO_PIN_DESC)
};

static const struct tegra_pmc_soc tegra124_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = ARRAY_SIZE(tegra124_powergates),
        .powergates = tegra124_powergates,
        .num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
        .cpu_powergates = tegra124_cpu_powergates,
        .has_tsense_reset = true,
        .has_gpu_clamps = true,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = false,
        .maybe_tz_only = false,
        .num_io_pads = ARRAY_SIZE(tegra124_io_pads),
        .io_pads = tegra124_io_pads,
        .num_pin_descs = ARRAY_SIZE(tegra124_pin_descs),
        .pin_descs = tegra124_pin_descs,
        .regs = &tegra20_pmc_regs,
        .init = tegra20_pmc_init,
        .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
        .powergate_set = tegra114_powergate_set,
        .reset_sources = tegra30_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources),
        .reset_levels = NULL,
        .num_reset_levels = 0,
        .pmc_clks_data = tegra_pmc_clks_data,
        .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data),
        .has_blink_output = true,
        .has_usb_sleepwalk = true,
};

static const char * const tegra210_powergates[] = {
        [TEGRA_POWERGATE_CPU] = "crail",
        [TEGRA_POWERGATE_3D] = "3d",
        [TEGRA_POWERGATE_VENC] = "venc",
        [TEGRA_POWERGATE_PCIE] = "pcie",
        [TEGRA_POWERGATE_MPE] = "mpe",
        [TEGRA_POWERGATE_SATA] = "sata",
        [TEGRA_POWERGATE_CPU1] = "cpu1",
        [TEGRA_POWERGATE_CPU2] = "cpu2",
        [TEGRA_POWERGATE_CPU3] = "cpu3",
        [TEGRA_POWERGATE_CPU0] = "cpu0",
        [TEGRA_POWERGATE_C0NC] = "c0nc",
        [TEGRA_POWERGATE_SOR] = "sor",
        [TEGRA_POWERGATE_DIS] = "dis",
        [TEGRA_POWERGATE_DISB] = "disb",
        [TEGRA_POWERGATE_XUSBA] = "xusba",
        [TEGRA_POWERGATE_XUSBB] = "xusbb",
        [TEGRA_POWERGATE_XUSBC] = "xusbc",
        [TEGRA_POWERGATE_VIC] = "vic",
        [TEGRA_POWERGATE_IRAM] = "iram",
        [TEGRA_POWERGATE_NVDEC] = "nvdec",
        [TEGRA_POWERGATE_NVJPG] = "nvjpg",
        [TEGRA_POWERGATE_AUD] = "aud",
        [TEGRA_POWERGATE_DFD] = "dfd",
        [TEGRA_POWERGATE_VE2] = "ve2",
};

static const u8 tegra210_cpu_powergates[] = {
        TEGRA_POWERGATE_CPU0,
        TEGRA_POWERGATE_CPU1,
        TEGRA_POWERGATE_CPU2,
        TEGRA_POWERGATE_CPU3,
};

#define TEGRA210_IO_PAD_TABLE(_pad)                                        \
        /*   .id                        .dpd     .voltage  .name */        \
        _pad(TEGRA_IO_PAD_AUDIO,       17,       5,        "audio"),       \
        _pad(TEGRA_IO_PAD_AUDIO_HV,    61,       18,       "audio-hv"),    \
        _pad(TEGRA_IO_PAD_CAM,         36,       10,       "cam"),         \
        _pad(TEGRA_IO_PAD_CSIA,        0,        UINT_MAX, "csia"),        \
        _pad(TEGRA_IO_PAD_CSIB,        1,        UINT_MAX, "csib"),        \
        _pad(TEGRA_IO_PAD_CSIC,        42,       UINT_MAX, "csic"),        \
        _pad(TEGRA_IO_PAD_CSID,        43,       UINT_MAX, "csid"),        \
        _pad(TEGRA_IO_PAD_CSIE,        44,       UINT_MAX, "csie"),        \
        _pad(TEGRA_IO_PAD_CSIF,        45,       UINT_MAX, "csif"),        \
        _pad(TEGRA_IO_PAD_DBG,         25,       19,       "dbg"),         \
        _pad(TEGRA_IO_PAD_DEBUG_NONAO, 26,       UINT_MAX, "debug-nonao"), \
        _pad(TEGRA_IO_PAD_DMIC,        50,       20,       "dmic"),        \
        _pad(TEGRA_IO_PAD_DP,          51,       UINT_MAX, "dp"),          \
        _pad(TEGRA_IO_PAD_DSI,         2,        UINT_MAX, "dsi"),         \
        _pad(TEGRA_IO_PAD_DSIB,        39,       UINT_MAX, "dsib"),        \
        _pad(TEGRA_IO_PAD_DSIC,        40,       UINT_MAX, "dsic"),        \
        _pad(TEGRA_IO_PAD_DSID,        41,       UINT_MAX, "dsid"),        \
        _pad(TEGRA_IO_PAD_EMMC,        35,       UINT_MAX, "emmc"),        \
        _pad(TEGRA_IO_PAD_EMMC2,       37,       UINT_MAX, "emmc2"),       \
        _pad(TEGRA_IO_PAD_GPIO,        27,       21,       "gpio"),        \
        _pad(TEGRA_IO_PAD_HDMI,        28,       UINT_MAX, "hdmi"),        \
        _pad(TEGRA_IO_PAD_HSIC,        19,       UINT_MAX, "hsic"),        \
        _pad(TEGRA_IO_PAD_LVDS,        57,       UINT_MAX, "lvds"),        \
        _pad(TEGRA_IO_PAD_MIPI_BIAS,   3,        UINT_MAX, "mipi-bias"),   \
        _pad(TEGRA_IO_PAD_PEX_BIAS,    4,        UINT_MAX, "pex-bias"),    \
        _pad(TEGRA_IO_PAD_PEX_CLK1,    5,        UINT_MAX, "pex-clk1"),    \
        _pad(TEGRA_IO_PAD_PEX_CLK2,    6,        UINT_MAX, "pex-clk2"),    \
        _pad(TEGRA_IO_PAD_PEX_CNTRL,   UINT_MAX, 11,       "pex-cntrl"),   \
        _pad(TEGRA_IO_PAD_SDMMC1,      33,       12,       "sdmmc1"),      \
        _pad(TEGRA_IO_PAD_SDMMC3,      34,       13,       "sdmmc3"),      \
        _pad(TEGRA_IO_PAD_SPI,         46,       22,       "spi"),         \
        _pad(TEGRA_IO_PAD_SPI_HV,      47,       23,       "spi-hv"),      \
        _pad(TEGRA_IO_PAD_UART,        14,       2,        "uart"),        \
        _pad(TEGRA_IO_PAD_USB0,        9,        UINT_MAX, "usb0"),        \
        _pad(TEGRA_IO_PAD_USB1,        10,       UINT_MAX, "usb1"),        \
        _pad(TEGRA_IO_PAD_USB2,        11,       UINT_MAX, "usb2"),        \
        _pad(TEGRA_IO_PAD_USB3,        18,       UINT_MAX, "usb3"),        \
        _pad(TEGRA_IO_PAD_USB_BIAS,    12,       UINT_MAX, "usb-bias")

static const struct tegra_io_pad_soc tegra210_io_pads[] = {
        TEGRA210_IO_PAD_TABLE(TEGRA_IO_PAD)
};

static const struct pinctrl_pin_desc tegra210_pin_descs[] = {
        TEGRA210_IO_PAD_TABLE(TEGRA_IO_PIN_DESC)
};

static const char * const tegra210_reset_sources[] = {
        "POWER_ON_RESET",
        "WATCHDOG",
        "SENSOR",
        "SW_MAIN",
        "LP0",
        "AOTAG"
};

static const struct tegra_wake_event tegra210_wake_events[] = {
        TEGRA_WAKE_IRQ("rtc", 16, 2),
        TEGRA_WAKE_IRQ("pmu", 51, 86),
};

static const struct tegra_pmc_soc tegra210_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = ARRAY_SIZE(tegra210_powergates),
        .powergates = tegra210_powergates,
        .num_cpu_powergates = ARRAY_SIZE(tegra210_cpu_powergates),
        .cpu_powergates = tegra210_cpu_powergates,
        .has_tsense_reset = true,
        .has_gpu_clamps = true,
        .needs_mbist_war = true,
        .has_impl_33v_pwr = false,
        .maybe_tz_only = true,
        .num_io_pads = ARRAY_SIZE(tegra210_io_pads),
        .io_pads = tegra210_io_pads,
        .num_pin_descs = ARRAY_SIZE(tegra210_pin_descs),
        .pin_descs = tegra210_pin_descs,
        .regs = &tegra20_pmc_regs,
        .init = tegra20_pmc_init,
        .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
        .powergate_set = tegra114_powergate_set,
        .irq_set_wake = tegra210_pmc_irq_set_wake,
        .irq_set_type = tegra210_pmc_irq_set_type,
        .reset_sources = tegra210_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra210_reset_sources),
        .reset_levels = NULL,
        .num_reset_levels = 0,
        .num_wake_events = ARRAY_SIZE(tegra210_wake_events),
        .wake_events = tegra210_wake_events,
        .pmc_clks_data = tegra_pmc_clks_data,
        .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data),
        .has_blink_output = true,
        .has_usb_sleepwalk = true,
};

#define TEGRA186_IO_PAD_TABLE(_pad)                                          \
        /*   .id                        .dpd      .voltage  .name */         \
        _pad(TEGRA_IO_PAD_CSIA,         0,        UINT_MAX, "csia"),         \
        _pad(TEGRA_IO_PAD_CSIB,         1,        UINT_MAX, "csib"),         \
        _pad(TEGRA_IO_PAD_DSI,          2,        UINT_MAX, "dsi"),          \
        _pad(TEGRA_IO_PAD_MIPI_BIAS,    3,        UINT_MAX, "mipi-bias"),    \
        _pad(TEGRA_IO_PAD_PEX_CLK_BIAS, 4,        UINT_MAX, "pex-clk-bias"), \
        _pad(TEGRA_IO_PAD_PEX_CLK3,     5,        UINT_MAX, "pex-clk3"),     \
        _pad(TEGRA_IO_PAD_PEX_CLK2,     6,        UINT_MAX, "pex-clk2"),     \
        _pad(TEGRA_IO_PAD_PEX_CLK1,     7,        UINT_MAX, "pex-clk1"),     \
        _pad(TEGRA_IO_PAD_USB0,         9,        UINT_MAX, "usb0"),         \
        _pad(TEGRA_IO_PAD_USB1,         10,       UINT_MAX, "usb1"),         \
        _pad(TEGRA_IO_PAD_USB2,         11,       UINT_MAX, "usb2"),         \
        _pad(TEGRA_IO_PAD_USB_BIAS,     12,       UINT_MAX, "usb-bias"),     \
        _pad(TEGRA_IO_PAD_UART,         14,       UINT_MAX, "uart"),         \
        _pad(TEGRA_IO_PAD_AUDIO,        17,       UINT_MAX, "audio"),        \
        _pad(TEGRA_IO_PAD_HSIC,         19,       UINT_MAX, "hsic"),         \
        _pad(TEGRA_IO_PAD_DBG,          25,       UINT_MAX, "dbg"),          \
        _pad(TEGRA_IO_PAD_HDMI_DP0,     28,       UINT_MAX, "hdmi-dp0"),     \
        _pad(TEGRA_IO_PAD_HDMI_DP1,     29,       UINT_MAX, "hdmi-dp1"),     \
        _pad(TEGRA_IO_PAD_PEX_CNTRL,    32,       UINT_MAX, "pex-cntrl"),    \
        _pad(TEGRA_IO_PAD_SDMMC2_HV,    34,       5,        "sdmmc2-hv"),    \
        _pad(TEGRA_IO_PAD_SDMMC4,       36,       UINT_MAX, "sdmmc4"),       \
        _pad(TEGRA_IO_PAD_CAM,          38,       UINT_MAX, "cam"),          \
        _pad(TEGRA_IO_PAD_DSIB,         40,       UINT_MAX, "dsib"),         \
        _pad(TEGRA_IO_PAD_DSIC,         41,       UINT_MAX, "dsic"),         \
        _pad(TEGRA_IO_PAD_DSID,         42,       UINT_MAX, "dsid"),         \
        _pad(TEGRA_IO_PAD_CSIC,         43,       UINT_MAX, "csic"),         \
        _pad(TEGRA_IO_PAD_CSID,         44,       UINT_MAX, "csid"),         \
        _pad(TEGRA_IO_PAD_CSIE,         45,       UINT_MAX, "csie"),         \
        _pad(TEGRA_IO_PAD_CSIF,         46,       UINT_MAX, "csif"),         \
        _pad(TEGRA_IO_PAD_SPI,          47,       UINT_MAX, "spi"),          \
        _pad(TEGRA_IO_PAD_UFS,          49,       UINT_MAX, "ufs"),          \
        _pad(TEGRA_IO_PAD_DMIC_HV,      52,       2,        "dmic-hv"),      \
        _pad(TEGRA_IO_PAD_EDP,          53,       UINT_MAX, "edp"),          \
        _pad(TEGRA_IO_PAD_SDMMC1_HV,    55,       4,        "sdmmc1-hv"),    \
        _pad(TEGRA_IO_PAD_SDMMC3_HV,    56,       6,        "sdmmc3-hv"),    \
        _pad(TEGRA_IO_PAD_CONN,         60,       UINT_MAX, "conn"),         \
        _pad(TEGRA_IO_PAD_AUDIO_HV,     61,       1,        "audio-hv"),     \
        _pad(TEGRA_IO_PAD_AO_HV,        UINT_MAX, 0,        "ao-hv")

static const struct tegra_io_pad_soc tegra186_io_pads[] = {
        TEGRA186_IO_PAD_TABLE(TEGRA_IO_PAD)
};

static const struct pinctrl_pin_desc tegra186_pin_descs[] = {
        TEGRA186_IO_PAD_TABLE(TEGRA_IO_PIN_DESC)
};

static const struct tegra_pmc_regs tegra186_pmc_regs = {
        .scratch0 = 0x2000,
        .dpd_req = 0x74,
        .dpd_status = 0x78,
        .dpd2_req = 0x7c,
        .dpd2_status = 0x80,
        .rst_status = 0x70,
        .rst_source_shift = 0x2,
        .rst_source_mask = 0x3c,
        .rst_level_shift = 0x0,
        .rst_level_mask = 0x3,
};

static void tegra186_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
                                            struct device_node *np,
                                            bool invert)
{
        struct resource regs;
        void __iomem *wake;
        u32 value;
        int index;

        index = of_property_match_string(np, "reg-names", "wake");
        if (index < 0) {
                dev_err(pmc->dev, "failed to find PMC wake registers\n");
                return;
        }

        of_address_to_resource(np, index, &regs);

        wake = ioremap(regs.start, resource_size(&regs));
        if (!wake) {
                dev_err(pmc->dev, "failed to map PMC wake registers\n");
                return;
        }

        value = readl(wake + WAKE_AOWAKE_CTRL);

        if (invert)
                value |= WAKE_AOWAKE_CTRL_INTR_POLARITY;
        else
                value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY;

        writel(value, wake + WAKE_AOWAKE_CTRL);

        iounmap(wake);
}

static const char * const tegra186_reset_sources[] = {
        "SYS_RESET",
        "AOWDT",
        "MCCPLEXWDT",
        "BPMPWDT",
        "SCEWDT",
        "SPEWDT",
        "APEWDT",
        "BCCPLEXWDT",
        "SENSOR",
        "AOTAG",
        "VFSENSOR",
        "SWREST",
        "SC7",
        "HSM",
        "CORESIGHT"
};

static const char * const tegra186_reset_levels[] = {
        "L0", "L1", "L2", "WARM"
};

static const struct tegra_wake_event tegra186_wake_events[] = {
        TEGRA_WAKE_IRQ("pmu", 24, 209),
        TEGRA_WAKE_GPIO("power", 29, 1, TEGRA186_AON_GPIO(FF, 0)),
        TEGRA_WAKE_IRQ("rtc", 73, 10),
};

static const struct tegra_pmc_soc tegra186_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = 0,
        .powergates = NULL,
        .num_cpu_powergates = 0,
        .cpu_powergates = NULL,
        .has_tsense_reset = false,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = true,
        .maybe_tz_only = false,
        .num_io_pads = ARRAY_SIZE(tegra186_io_pads),
        .io_pads = tegra186_io_pads,
        .num_pin_descs = ARRAY_SIZE(tegra186_pin_descs),
        .pin_descs = tegra186_pin_descs,
        .regs = &tegra186_pmc_regs,
        .init = NULL,
        .setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
        .irq_set_wake = tegra186_pmc_irq_set_wake,
        .irq_set_type = tegra186_pmc_irq_set_type,
        .reset_sources = tegra186_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra186_reset_sources),
        .reset_levels = tegra186_reset_levels,
        .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels),
        .num_wake_events = ARRAY_SIZE(tegra186_wake_events),
        .wake_events = tegra186_wake_events,
        .pmc_clks_data = NULL,
        .num_pmc_clks = 0,
        .has_blink_output = false,
        .has_usb_sleepwalk = false,
};

#define TEGRA194_IO_PAD_TABLE(_pad)                                              \
        /*   .id                          .dpd      .voltage  .name */           \
        _pad(TEGRA_IO_PAD_CSIA,           0,        UINT_MAX, "csia"),           \
        _pad(TEGRA_IO_PAD_CSIB,           1,        UINT_MAX, "csib"),           \
        _pad(TEGRA_IO_PAD_MIPI_BIAS,      3,        UINT_MAX, "mipi-bias"),      \
        _pad(TEGRA_IO_PAD_PEX_CLK_BIAS,   4,        UINT_MAX, "pex-clk-bias"),   \
        _pad(TEGRA_IO_PAD_PEX_CLK3,       5,        UINT_MAX, "pex-clk3"),       \
        _pad(TEGRA_IO_PAD_PEX_CLK2,       6,        UINT_MAX, "pex-clk2"),       \
        _pad(TEGRA_IO_PAD_PEX_CLK1,       7,        UINT_MAX, "pex-clk1"),       \
        _pad(TEGRA_IO_PAD_EQOS,           8,        UINT_MAX, "eqos"),           \
        _pad(TEGRA_IO_PAD_PEX_CLK_2_BIAS, 9,        UINT_MAX, "pex-clk-2-bias"), \
        _pad(TEGRA_IO_PAD_PEX_CLK_2,      10,       UINT_MAX, "pex-clk-2"),      \
        _pad(TEGRA_IO_PAD_DAP3,           11,       UINT_MAX, "dap3"),           \
        _pad(TEGRA_IO_PAD_DAP5,           12,       UINT_MAX, "dap5"),           \
        _pad(TEGRA_IO_PAD_UART,           14,       UINT_MAX, "uart"),           \
        _pad(TEGRA_IO_PAD_PWR_CTL,        15,       UINT_MAX, "pwr-ctl"),        \
        _pad(TEGRA_IO_PAD_SOC_GPIO53,     16,       UINT_MAX, "soc-gpio53"),     \
        _pad(TEGRA_IO_PAD_AUDIO,          17,       UINT_MAX, "audio"),          \
        _pad(TEGRA_IO_PAD_GP_PWM2,        18,       UINT_MAX, "gp-pwm2"),        \
        _pad(TEGRA_IO_PAD_GP_PWM3,        19,       UINT_MAX, "gp-pwm3"),        \
        _pad(TEGRA_IO_PAD_SOC_GPIO12,     20,       UINT_MAX, "soc-gpio12"),     \
        _pad(TEGRA_IO_PAD_SOC_GPIO13,     21,       UINT_MAX, "soc-gpio13"),     \
        _pad(TEGRA_IO_PAD_SOC_GPIO10,     22,       UINT_MAX, "soc-gpio10"),     \
        _pad(TEGRA_IO_PAD_UART4,          23,       UINT_MAX, "uart4"),          \
        _pad(TEGRA_IO_PAD_UART5,          24,       UINT_MAX, "uart5"),          \
        _pad(TEGRA_IO_PAD_DBG,            25,       UINT_MAX, "dbg"),            \
        _pad(TEGRA_IO_PAD_HDMI_DP3,       26,       UINT_MAX, "hdmi-dp3"),       \
        _pad(TEGRA_IO_PAD_HDMI_DP2,       27,       UINT_MAX, "hdmi-dp2"),       \
        _pad(TEGRA_IO_PAD_HDMI_DP0,       28,       UINT_MAX, "hdmi-dp0"),       \
        _pad(TEGRA_IO_PAD_HDMI_DP1,       29,       UINT_MAX, "hdmi-dp1"),       \
        _pad(TEGRA_IO_PAD_PEX_CNTRL,      32,       UINT_MAX, "pex-cntrl"),      \
        _pad(TEGRA_IO_PAD_PEX_CTL2,       33,       UINT_MAX, "pex-ctl2"),       \
        _pad(TEGRA_IO_PAD_PEX_L0_RST_N,   34,       UINT_MAX, "pex-l0-rst"),     \
        _pad(TEGRA_IO_PAD_PEX_L1_RST_N,   35,       UINT_MAX, "pex-l1-rst"),     \
        _pad(TEGRA_IO_PAD_SDMMC4,         36,       UINT_MAX, "sdmmc4"),         \
        _pad(TEGRA_IO_PAD_PEX_L5_RST_N,   37,       UINT_MAX, "pex-l5-rst"),     \
        _pad(TEGRA_IO_PAD_CAM,            38,       UINT_MAX, "cam"),            \
        _pad(TEGRA_IO_PAD_CSIC,           43,       UINT_MAX, "csic"),           \
        _pad(TEGRA_IO_PAD_CSID,           44,       UINT_MAX, "csid"),           \
        _pad(TEGRA_IO_PAD_CSIE,           45,       UINT_MAX, "csie"),           \
        _pad(TEGRA_IO_PAD_CSIF,           46,       UINT_MAX, "csif"),           \
        _pad(TEGRA_IO_PAD_SPI,            47,       UINT_MAX, "spi"),            \
        _pad(TEGRA_IO_PAD_UFS,            49,       UINT_MAX, "ufs"),            \
        _pad(TEGRA_IO_PAD_CSIG,           50,       UINT_MAX, "csig"),           \
        _pad(TEGRA_IO_PAD_CSIH,           51,       UINT_MAX, "csih"),           \
        _pad(TEGRA_IO_PAD_EDP,            53,       UINT_MAX, "edp"),            \
        _pad(TEGRA_IO_PAD_SDMMC1_HV,      55,       4,        "sdmmc1-hv"),      \
        _pad(TEGRA_IO_PAD_SDMMC3_HV,      56,       6,        "sdmmc3-hv"),      \
        _pad(TEGRA_IO_PAD_CONN,           60,       UINT_MAX, "conn"),           \
        _pad(TEGRA_IO_PAD_AUDIO_HV,       61,       1,        "audio-hv"),       \
        _pad(TEGRA_IO_PAD_AO_HV,          UINT_MAX, 0,        "ao-hv")

static const struct tegra_io_pad_soc tegra194_io_pads[] = {
        TEGRA194_IO_PAD_TABLE(TEGRA_IO_PAD)
};

static const struct pinctrl_pin_desc tegra194_pin_descs[] = {
        TEGRA194_IO_PAD_TABLE(TEGRA_IO_PIN_DESC)
};

static const struct tegra_pmc_regs tegra194_pmc_regs = {
        .scratch0 = 0x2000,
        .dpd_req = 0x74,
        .dpd_status = 0x78,
        .dpd2_req = 0x7c,
        .dpd2_status = 0x80,
        .rst_status = 0x70,
        .rst_source_shift = 0x2,
        .rst_source_mask = 0x7c,
        .rst_level_shift = 0x0,
        .rst_level_mask = 0x3,
};

static const char * const tegra194_reset_sources[] = {
        "SYS_RESET_N",
        "AOWDT",
        "BCCPLEXWDT",
        "BPMPWDT",
        "SCEWDT",
        "SPEWDT",
        "APEWDT",
        "LCCPLEXWDT",
        "SENSOR",
        "AOTAG",
        "VFSENSOR",
        "MAINSWRST",
        "SC7",
        "HSM",
        "CSITE",
        "RCEWDT",
        "PVA0WDT",
        "PVA1WDT",
        "L1A_ASYNC",
        "BPMPBOOT",
        "FUSECRC",
};

static const struct tegra_wake_event tegra194_wake_events[] = {
        TEGRA_WAKE_IRQ("pmu", 24, 209),
        TEGRA_WAKE_GPIO("power", 29, 1, TEGRA194_AON_GPIO(EE, 4)),
        TEGRA_WAKE_IRQ("rtc", 73, 10),
};

static const struct tegra_pmc_soc tegra194_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = 0,
        .powergates = NULL,
        .num_cpu_powergates = 0,
        .cpu_powergates = NULL,
        .has_tsense_reset = false,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = true,
        .maybe_tz_only = false,
        .num_io_pads = ARRAY_SIZE(tegra194_io_pads),
        .io_pads = tegra194_io_pads,
        .num_pin_descs = ARRAY_SIZE(tegra194_pin_descs),
        .pin_descs = tegra194_pin_descs,
        .regs = &tegra194_pmc_regs,
        .init = NULL,
        .setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
        .irq_set_wake = tegra186_pmc_irq_set_wake,
        .irq_set_type = tegra186_pmc_irq_set_type,
        .reset_sources = tegra194_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra194_reset_sources),
        .reset_levels = tegra186_reset_levels,
        .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels),
        .num_wake_events = ARRAY_SIZE(tegra194_wake_events),
        .wake_events = tegra194_wake_events,
        .pmc_clks_data = NULL,
        .num_pmc_clks = 0,
        .has_blink_output = false,
        .has_usb_sleepwalk = false,
};

static const struct tegra_pmc_regs tegra234_pmc_regs = {
        .scratch0 = 0x2000,
        .dpd_req = 0,
        .dpd_status = 0,
        .dpd2_req = 0,
        .dpd2_status = 0,
        .rst_status = 0x70,
        .rst_source_shift = 0x2,
        .rst_source_mask = 0xfc,
        .rst_level_shift = 0x0,
        .rst_level_mask = 0x3,
};

static const char * const tegra234_reset_sources[] = {
        "SYS_RESET_N",
        "AOWDT",
        "BCCPLEXWDT",
        "BPMPWDT",
        "SCEWDT",
        "SPEWDT",
        "APEWDT",
        "LCCPLEXWDT",
        "SENSOR",
        "AOTAG",
        "VFSENSOR",
        "MAINSWRST",
        "SC7",
        "HSM",
        "CSITE",
        "RCEWDT",
        "PVA0WDT",
        "PVA1WDT",
        "L1A_ASYNC",
        "BPMPBOOT",
        "FUSECRC",
};

static const struct tegra_pmc_soc tegra234_pmc_soc = {
        .supports_core_domain = false,
        .num_powergates = 0,
        .powergates = NULL,
        .num_cpu_powergates = 0,
        .cpu_powergates = NULL,
        .has_tsense_reset = false,
        .has_gpu_clamps = false,
        .needs_mbist_war = false,
        .has_impl_33v_pwr = true,
        .maybe_tz_only = false,
        .num_io_pads = 0,
        .io_pads = NULL,
        .num_pin_descs = 0,
        .pin_descs = NULL,
        .regs = &tegra234_pmc_regs,
        .init = NULL,
        .setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
        .irq_set_wake = tegra186_pmc_irq_set_wake,
        .irq_set_type = tegra186_pmc_irq_set_type,
        .reset_sources = tegra234_reset_sources,
        .num_reset_sources = ARRAY_SIZE(tegra234_reset_sources),
        .reset_levels = tegra186_reset_levels,
        .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels),
        .num_wake_events = 0,
        .wake_events = NULL,
        .pmc_clks_data = NULL,
        .num_pmc_clks = 0,
        .has_blink_output = false,
};

static const struct of_device_id tegra_pmc_match[] = {
        { .compatible = "nvidia,tegra234-pmc", .data = &tegra234_pmc_soc },
        { .compatible = "nvidia,tegra194-pmc", .data = &tegra194_pmc_soc },
        { .compatible = "nvidia,tegra186-pmc", .data = &tegra186_pmc_soc },
        { .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
        { .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
        { .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
        { .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
        { .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
        { .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
        { }
};

static void tegra_pmc_sync_state(struct device *dev)
{
        int err;

        /*
         * Newer device-trees have power domains, but we need to prepare all
         * device drivers with runtime PM and OPP support first, otherwise
         * state syncing is unsafe.
         */
        if (!pmc->soc->supports_core_domain)
                return;

        /*
         * Older device-trees don't have core PD, and thus, there are
         * no dependencies that will block the state syncing. We shouldn't
         * mark the domain as synced in this case.
         */
        if (!pmc->core_domain_registered)
                return;

        pmc->core_domain_state_synced = true;

        /* this is a no-op if core regulator isn't used */
        mutex_lock(&pmc->powergates_lock);
        err = dev_pm_opp_sync_regulators(dev);
        mutex_unlock(&pmc->powergates_lock);

        if (err)
                dev_err(dev, "failed to sync regulators: %d\n", err);
}

static struct platform_driver tegra_pmc_driver = {
        .driver = {
                .name = "tegra-pmc",
                .suppress_bind_attrs = true,
                .of_match_table = tegra_pmc_match,
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
                .pm = &tegra_pmc_pm_ops,
#endif
                .sync_state = tegra_pmc_sync_state,
        },
        .probe = tegra_pmc_probe,
};
builtin_platform_driver(tegra_pmc_driver);

static bool __init tegra_pmc_detect_tz_only(struct tegra_pmc *pmc)
{
        u32 value, saved;

        saved = readl(pmc->base + pmc->soc->regs->scratch0);
        value = saved ^ 0xffffffff;

        if (value == 0xffffffff)
                value = 0xdeadbeef;

        /* write pattern and read it back */
        writel(value, pmc->base + pmc->soc->regs->scratch0);
        value = readl(pmc->base + pmc->soc->regs->scratch0);

        /* if we read all-zeroes, access is restricted to TZ only */
        if (value == 0) {
                pr_info("access to PMC is restricted to TZ\n");
                return true;
        }

        /* restore original value */
        writel(saved, pmc->base + pmc->soc->regs->scratch0);

        return false;
}

/*
 * Early initialization to allow access to registers in the very early boot
 * process.
 */
static int __init tegra_pmc_early_init(void)
{
        const struct of_device_id *match;
        struct device_node *np;
        struct resource regs;
        unsigned int i;
        bool invert;

        mutex_init(&pmc->powergates_lock);

        np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
        if (!np) {
                /*
                 * Fall back to legacy initialization for 32-bit ARM only. All
                 * 64-bit ARM device tree files for Tegra are required to have
                 * a PMC node.
                 *
                 * This is for backwards-compatibility with old device trees
                 * that didn't contain a PMC node. Note that in this case the
                 * SoC data can't be matched and therefore powergating is
                 * disabled.
                 */
                if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
                        pr_warn("DT node not found, powergating disabled\n");

                        regs.start = 0x7000e400;
                        regs.end = 0x7000e7ff;
                        regs.flags = IORESOURCE_MEM;

                        pr_warn("Using memory region %pR\n", &regs);
                } else {
                        /*
                         * At this point we're not running on Tegra, so play
                         * nice with multi-platform kernels.
                         */
                        return 0;
                }
        } else {
                /*
                 * Extract information from the device tree if we've found a
                 * matching node.
                 */
                if (of_address_to_resource(np, 0, &regs) < 0) {
                        pr_err("failed to get PMC registers\n");
                        of_node_put(np);
                        return -ENXIO;
                }
        }

        pmc->base = ioremap(regs.start, resource_size(&regs));
        if (!pmc->base) {
                pr_err("failed to map PMC registers\n");
                of_node_put(np);
                return -ENXIO;
        }

        if (np) {
                pmc->soc = match->data;

                if (pmc->soc->maybe_tz_only)
                        pmc->tz_only = tegra_pmc_detect_tz_only(pmc);

                /* Create a bitmap of the available and valid partitions */
                for (i = 0; i < pmc->soc->num_powergates; i++)
                        if (pmc->soc->powergates[i])
                                set_bit(i, pmc->powergates_available);

                /*
                 * Invert the interrupt polarity if a PMC device tree node
                 * exists and contains the nvidia,invert-interrupt property.
                 */
                invert = of_property_read_bool(np, "nvidia,invert-interrupt");

                pmc->soc->setup_irq_polarity(pmc, np, invert);

                of_node_put(np);
        }

        return 0;
}
early_initcall(tegra_pmc_early_init);