LXR linux/drivers/acpi/pmic/intel_pmic

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * XPower AXP288 PMIC operation region driver
   4 *
   5 * Copyright (C) 2014 Intel Corporation. All rights reserved.
   6 */
   7
   8#include <linux/acpi.h>
   9#include <linux/init.h>
  10#include <linux/mfd/axp20x.h>
  11#include <linux/regmap.h>
  12#include <linux/platform_device.h>
  13#include <asm/iosf_mbi.h>
  14#include "intel_pmic.h"
  15
  16#define XPOWER_GPADC_LOW        0x5b
  17#define XPOWER_GPI1_CTRL        0x92
  18
  19#define GPI1_LDO_MASK           GENMASK(2, 0)
  20#define GPI1_LDO_ON             (3 << 0)
  21#define GPI1_LDO_OFF            (4 << 0)
  22
  23#define AXP288_ADC_TS_CURRENT_ON_OFF_MASK               GENMASK(1, 0)
  24#define AXP288_ADC_TS_CURRENT_OFF                       (0 << 0)
  25#define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING          (1 << 0)
  26#define AXP288_ADC_TS_CURRENT_ON_ONDEMAND               (2 << 0)
  27#define AXP288_ADC_TS_CURRENT_ON                        (3 << 0)
  28
  29static struct pmic_table power_table[] = {
  30        {
  31                .address = 0x00,
  32                .reg = 0x13,
  33                .bit = 0x05,
  34        }, /* ALD1 */
  35        {
  36                .address = 0x04,
  37                .reg = 0x13,
  38                .bit = 0x06,
  39        }, /* ALD2 */
  40        {
  41                .address = 0x08,
  42                .reg = 0x13,
  43                .bit = 0x07,
  44        }, /* ALD3 */
  45        {
  46                .address = 0x0c,
  47                .reg = 0x12,
  48                .bit = 0x03,
  49        }, /* DLD1 */
  50        {
  51                .address = 0x10,
  52                .reg = 0x12,
  53                .bit = 0x04,
  54        }, /* DLD2 */
  55        {
  56                .address = 0x14,
  57                .reg = 0x12,
  58                .bit = 0x05,
  59        }, /* DLD3 */
  60        {
  61                .address = 0x18,
  62                .reg = 0x12,
  63                .bit = 0x06,
  64        }, /* DLD4 */
  65        {
  66                .address = 0x1c,
  67                .reg = 0x12,
  68                .bit = 0x00,
  69        }, /* ELD1 */
  70        {
  71                .address = 0x20,
  72                .reg = 0x12,
  73                .bit = 0x01,
  74        }, /* ELD2 */
  75        {
  76                .address = 0x24,
  77                .reg = 0x12,
  78                .bit = 0x02,
  79        }, /* ELD3 */
  80        {
  81                .address = 0x28,
  82                .reg = 0x13,
  83                .bit = 0x02,
  84        }, /* FLD1 */
  85        {
  86                .address = 0x2c,
  87                .reg = 0x13,
  88                .bit = 0x03,
  89        }, /* FLD2 */
  90        {
  91                .address = 0x30,
  92                .reg = 0x13,
  93                .bit = 0x04,
  94        }, /* FLD3 */
  95        {
  96                .address = 0x34,
  97                .reg = 0x10,
  98                .bit = 0x03,
  99        }, /* BUC1 */
 100        {
 101                .address = 0x38,
 102                .reg = 0x10,
 103                .bit = 0x06,
 104        }, /* BUC2 */
 105        {
 106                .address = 0x3c,
 107                .reg = 0x10,
 108                .bit = 0x05,
 109        }, /* BUC3 */
 110        {
 111                .address = 0x40,
 112                .reg = 0x10,
 113                .bit = 0x04,
 114        }, /* BUC4 */
 115        {
 116                .address = 0x44,
 117                .reg = 0x10,
 118                .bit = 0x01,
 119        }, /* BUC5 */
 120        {
 121                .address = 0x48,
 122                .reg = 0x10,
 123                .bit = 0x00
 124        }, /* BUC6 */
 125        {
 126                .address = 0x4c,
 127                .reg = 0x92,
 128        }, /* GPI1 */
 129};
 130
 131/* TMP0 - TMP5 are the same, all from GPADC */
 132static struct pmic_table thermal_table[] = {
 133        {
 134                .address = 0x00,
 135                .reg = XPOWER_GPADC_LOW
 136        },
 137        {
 138                .address = 0x0c,
 139                .reg = XPOWER_GPADC_LOW
 140        },
 141        {
 142                .address = 0x18,
 143                .reg = XPOWER_GPADC_LOW
 144        },
 145        {
 146                .address = 0x24,
 147                .reg = XPOWER_GPADC_LOW
 148        },
 149        {
 150                .address = 0x30,
 151                .reg = XPOWER_GPADC_LOW
 152        },
 153        {
 154                .address = 0x3c,
 155                .reg = XPOWER_GPADC_LOW
 156        },
 157};
 158
 159static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
 160                                       int bit, u64 *value)
 161{
 162        int data;
 163
 164        if (regmap_read(regmap, reg, &data))
 165                return -EIO;
 166
 167        /* GPIO1 LDO regulator needs special handling */
 168        if (reg == XPOWER_GPI1_CTRL)
 169                *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON);
 170        else
 171                *value = (data & BIT(bit)) ? 1 : 0;
 172
 173        return 0;
 174}
 175
 176static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg,
 177                                          int bit, bool on)
 178{
 179        int data, ret;
 180
 181        ret = iosf_mbi_block_punit_i2c_access();
 182        if (ret)
 183                return ret;
 184
 185        /* GPIO1 LDO regulator needs special handling */
 186        if (reg == XPOWER_GPI1_CTRL) {
 187                ret = regmap_update_bits(regmap, reg, GPI1_LDO_MASK,
 188                                         on ? GPI1_LDO_ON : GPI1_LDO_OFF);
 189                goto out;
 190        }
 191
 192        if (regmap_read(regmap, reg, &data)) {
 193                ret = -EIO;
 194                goto out;
 195        }
 196
 197        if (on)
 198                data |= BIT(bit);
 199        else
 200                data &= ~BIT(bit);
 201
 202        if (regmap_write(regmap, reg, data))
 203                ret = -EIO;
 204out:
 205        iosf_mbi_unblock_punit_i2c_access();
 206
 207        return ret;
 208}
 209
 210/**
 211 * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
 212 *
 213 * @regmap: regmap of the PMIC device
 214 * @reg: register to get the reading
 215 *
 216 * Return a positive value on success, errno on failure.
 217 */
 218static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
 219{
 220        int ret, adc_ts_pin_ctrl;
 221        u8 buf[2];
 222
 223        /*
 224         * The current-source used for the battery temp-sensor (TS) is shared
 225         * with the GPADC. For proper fuel-gauge and charger operation the TS
 226         * current-source needs to be permanently on. But to read the GPADC we
 227         * need to temporary switch the TS current-source to ondemand, so that
 228         * the GPADC can use it, otherwise we will always read an all 0 value.
 229         *
 230         * Note that the switching from on to on-ondemand is not necessary
 231         * when the TS current-source is off (this happens on devices which
 232         * do not use the TS-pin).
 233         */
 234        ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl);
 235        if (ret)
 236                return ret;
 237
 238        if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
 239                /*
 240                 * AXP288_ADC_TS_PIN_CTRL reads are cached by the regmap, so
 241                 * this does to a single I2C-transfer, and thus there is no
 242                 * need to explicitly call iosf_mbi_block_punit_i2c_access().
 243                 */
 244                ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
 245                                         AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
 246                                         AXP288_ADC_TS_CURRENT_ON_ONDEMAND);
 247                if (ret)
 248                        return ret;
 249
 250                /* Wait a bit after switching the current-source */
 251                usleep_range(6000, 10000);
 252        }
 253
 254        ret = iosf_mbi_block_punit_i2c_access();
 255        if (ret)
 256                return ret;
 257
 258        ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2);
 259        if (ret == 0)
 260                ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f);
 261
 262        if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) {
 263                regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL,
 264                                   AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
 265                                   AXP288_ADC_TS_CURRENT_ON);
 266        }
 267
 268        iosf_mbi_unblock_punit_i2c_access();
 269
 270        return ret;
 271}
 272
 273static int intel_xpower_exec_mipi_pmic_seq_element(struct regmap *regmap,
 274                                                   u16 i2c_address, u32 reg_address,
 275                                                   u32 value, u32 mask)
 276{
 277        int ret;
 278
 279        if (i2c_address != 0x34) {
 280                pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
 281                       __func__, i2c_address, reg_address, value, mask);
 282                return -ENXIO;
 283        }
 284
 285        ret = iosf_mbi_block_punit_i2c_access();
 286        if (ret)
 287                return ret;
 288
 289        ret = regmap_update_bits(regmap, reg_address, mask, value);
 290
 291        iosf_mbi_unblock_punit_i2c_access();
 292
 293        return ret;
 294}
 295
 296static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
 297        .get_power = intel_xpower_pmic_get_power,
 298        .update_power = intel_xpower_pmic_update_power,
 299        .get_raw_temp = intel_xpower_pmic_get_raw_temp,
 300        .exec_mipi_pmic_seq_element = intel_xpower_exec_mipi_pmic_seq_element,
 301        .power_table = power_table,
 302        .power_table_count = ARRAY_SIZE(power_table),
 303        .thermal_table = thermal_table,
 304        .thermal_table_count = ARRAY_SIZE(thermal_table),
 305        .pmic_i2c_address = 0x34,
 306};
 307
 308static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
 309                acpi_physical_address address, u32 bit_width, u64 *value,
 310                void *handler_context, void *region_context)
 311{
 312        return AE_OK;
 313}
 314
 315static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
 316{
 317        struct device *parent = pdev->dev.parent;
 318        struct axp20x_dev *axp20x = dev_get_drvdata(parent);
 319        acpi_status status;
 320        int result;
 321
 322        status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
 323                        ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
 324                        NULL, NULL);
 325        if (ACPI_FAILURE(status))
 326                return -ENODEV;
 327
 328        result = intel_pmic_install_opregion_handler(&pdev->dev,
 329                                        ACPI_HANDLE(parent), axp20x->regmap,
 330                                        &intel_xpower_pmic_opregion_data);
 331        if (result)
 332                acpi_remove_address_space_handler(ACPI_HANDLE(parent),
 333                                                  ACPI_ADR_SPACE_GPIO,
 334                                                  intel_xpower_pmic_gpio_handler);
 335
 336        return result;
 337}
 338
 339static struct platform_driver intel_xpower_pmic_opregion_driver = {
 340        .probe = intel_xpower_pmic_opregion_probe,
 341        .driver = {
 342                .name = "axp288_pmic_acpi",
 343        },
 344};
 345builtin_platform_driver(intel_xpower_pmic_opregion_driver);
 346