/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 * Copyright (c) 2013 Linaro Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This file contains the utility functions to register the pll clocks.
*/

#include <linux/errno.h>
#include <linux/hrtimer.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/clkdev.h>
#include "clk.h"
#include "clk-pll.h"

#define PLL_TIMEOUT_MS          10

struct samsung_clk_pll {
        struct clk_hw           hw;
        void __iomem            *lock_reg;
        void __iomem            *con_reg;
        /* PLL enable control bit offset in @con_reg register */
        unsigned short          enable_offs;
        /* PLL lock status bit offset in @con_reg register */
        unsigned short          lock_offs;
        enum samsung_pll_type   type;
        unsigned int            rate_count;
        const struct samsung_pll_rate_table *rate_table;
};

#define to_clk_pll(_hw) container_of(_hw, struct samsung_clk_pll, hw)

static const struct samsung_pll_rate_table *samsung_get_pll_settings(
                                struct samsung_clk_pll *pll, unsigned long rate)
{
        const struct samsung_pll_rate_table  *rate_table = pll->rate_table;
        int i;

        for (i = 0; i < pll->rate_count; i++) {
                if (rate == rate_table[i].rate)
                        return &rate_table[i];
        }

        return NULL;
}

static long samsung_pll_round_rate(struct clk_hw *hw,
                        unsigned long drate, unsigned long *prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate_table = pll->rate_table;
        int i;

        /* Assumming rate_table is in descending order */
        for (i = 0; i < pll->rate_count; i++) {
                if (drate >= rate_table[i].rate)
                        return rate_table[i].rate;
        }

        /* return minimum supported value */
        return rate_table[i - 1].rate;
}

static int samsung_pll3xxx_enable(struct clk_hw *hw)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 tmp;

        tmp = readl_relaxed(pll->con_reg);
        tmp |= BIT(pll->enable_offs);
        writel_relaxed(tmp, pll->con_reg);

        /* wait lock time */
        do {
                cpu_relax();
                tmp = readl_relaxed(pll->con_reg);
        } while (!(tmp & BIT(pll->lock_offs)));

        return 0;
}

static void samsung_pll3xxx_disable(struct clk_hw *hw)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 tmp;

        tmp = readl_relaxed(pll->con_reg);
        tmp &= ~BIT(pll->enable_offs);
        writel_relaxed(tmp, pll->con_reg);
}

/*
 * PLL2126 Clock Type
 */

#define PLL2126_MDIV_MASK       (0xff)
#define PLL2126_PDIV_MASK       (0x3f)
#define PLL2126_SDIV_MASK       (0x3)
#define PLL2126_MDIV_SHIFT      (16)
#define PLL2126_PDIV_SHIFT      (8)
#define PLL2126_SDIV_SHIFT      (0)

static unsigned long samsung_pll2126_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 pll_con, mdiv, pdiv, sdiv;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLL2126_MDIV_SHIFT) & PLL2126_MDIV_MASK;
        pdiv = (pll_con >> PLL2126_PDIV_SHIFT) & PLL2126_PDIV_MASK;
        sdiv = (pll_con >> PLL2126_SDIV_SHIFT) & PLL2126_SDIV_MASK;

        fvco *= (mdiv + 8);
        do_div(fvco, (pdiv + 2) << sdiv);

        return (unsigned long)fvco;
}

static const struct clk_ops samsung_pll2126_clk_ops = {
        .recalc_rate = samsung_pll2126_recalc_rate,
};

/*
 * PLL3000 Clock Type
 */

#define PLL3000_MDIV_MASK       (0xff)
#define PLL3000_PDIV_MASK       (0x3)
#define PLL3000_SDIV_MASK       (0x3)
#define PLL3000_MDIV_SHIFT      (16)
#define PLL3000_PDIV_SHIFT      (8)
#define PLL3000_SDIV_SHIFT      (0)

static unsigned long samsung_pll3000_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 pll_con, mdiv, pdiv, sdiv;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLL3000_MDIV_SHIFT) & PLL3000_MDIV_MASK;
        pdiv = (pll_con >> PLL3000_PDIV_SHIFT) & PLL3000_PDIV_MASK;
        sdiv = (pll_con >> PLL3000_SDIV_SHIFT) & PLL3000_SDIV_MASK;

        fvco *= (2 * (mdiv + 8));
        do_div(fvco, pdiv << sdiv);

        return (unsigned long)fvco;
}

static const struct clk_ops samsung_pll3000_clk_ops = {
        .recalc_rate = samsung_pll3000_recalc_rate,
};

/*
 * PLL35xx Clock Type
 */
/* Maximum lock time can be 270 * PDIV cycles */
#define PLL35XX_LOCK_FACTOR     (270)

#define PLL35XX_MDIV_MASK       (0x3FF)
#define PLL35XX_PDIV_MASK       (0x3F)
#define PLL35XX_SDIV_MASK       (0x7)
#define PLL35XX_MDIV_SHIFT      (16)
#define PLL35XX_PDIV_SHIFT      (8)
#define PLL35XX_SDIV_SHIFT      (0)
#define PLL35XX_LOCK_STAT_SHIFT (29)
#define PLL35XX_ENABLE_SHIFT    (31)

static unsigned long samsung_pll35xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
        pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
        sdiv = (pll_con >> PLL35XX_SDIV_SHIFT) & PLL35XX_SDIV_MASK;

        fvco *= mdiv;
        do_div(fvco, (pdiv << sdiv));

        return (unsigned long)fvco;
}

static inline bool samsung_pll35xx_mp_change(
                const struct samsung_pll_rate_table *rate, u32 pll_con)
{
        u32 old_mdiv, old_pdiv;

        old_mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
        old_pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;

        return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv);
}

static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 tmp;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        tmp = readl_relaxed(pll->con_reg);

        if (!(samsung_pll35xx_mp_change(rate, tmp))) {
                /* If only s change, change just s value only*/
                tmp &= ~(PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT);
                tmp |= rate->sdiv << PLL35XX_SDIV_SHIFT;
                writel_relaxed(tmp, pll->con_reg);

                return 0;
        }

        /* Set PLL lock time. */
        writel_relaxed(rate->pdiv * PLL35XX_LOCK_FACTOR,
                        pll->lock_reg);

        /* Change PLL PMS values */
        tmp &= ~((PLL35XX_MDIV_MASK << PLL35XX_MDIV_SHIFT) |
                        (PLL35XX_PDIV_MASK << PLL35XX_PDIV_SHIFT) |
                        (PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT));
        tmp |= (rate->mdiv << PLL35XX_MDIV_SHIFT) |
                        (rate->pdiv << PLL35XX_PDIV_SHIFT) |
                        (rate->sdiv << PLL35XX_SDIV_SHIFT);
        writel_relaxed(tmp, pll->con_reg);

        /* Wait until the PLL is locked if it is enabled. */
        if (tmp & BIT(pll->enable_offs)) {
                do {
                        cpu_relax();
                        tmp = readl_relaxed(pll->con_reg);
                } while (!(tmp & BIT(pll->lock_offs)));
        }
        return 0;
}

static const struct clk_ops samsung_pll35xx_clk_ops = {
        .recalc_rate = samsung_pll35xx_recalc_rate,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_pll35xx_set_rate,
        .enable = samsung_pll3xxx_enable,
        .disable = samsung_pll3xxx_disable,
};

static const struct clk_ops samsung_pll35xx_clk_min_ops = {
        .recalc_rate = samsung_pll35xx_recalc_rate,
};

/*
 * PLL36xx Clock Type
 */
/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL36XX_LOCK_FACTOR    (3000)

#define PLL36XX_KDIV_MASK       (0xFFFF)
#define PLL36XX_MDIV_MASK       (0x1FF)
#define PLL36XX_PDIV_MASK       (0x3F)
#define PLL36XX_SDIV_MASK       (0x7)
#define PLL36XX_MDIV_SHIFT      (16)
#define PLL36XX_PDIV_SHIFT      (8)
#define PLL36XX_SDIV_SHIFT      (0)
#define PLL36XX_KDIV_SHIFT      (0)
#define PLL36XX_LOCK_STAT_SHIFT (29)
#define PLL36XX_ENABLE_SHIFT    (31)

static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
        s16 kdiv;
        u64 fvco = parent_rate;

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con1 = readl_relaxed(pll->con_reg + 4);
        mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
        pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
        sdiv = (pll_con0 >> PLL36XX_SDIV_SHIFT) & PLL36XX_SDIV_MASK;
        kdiv = (s16)(pll_con1 & PLL36XX_KDIV_MASK);

        fvco *= (mdiv << 16) + kdiv;
        do_div(fvco, (pdiv << sdiv));
        fvco >>= 16;

        return (unsigned long)fvco;
}

static inline bool samsung_pll36xx_mpk_change(
        const struct samsung_pll_rate_table *rate, u32 pll_con0, u32 pll_con1)
{
        u32 old_mdiv, old_pdiv, old_kdiv;

        old_mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
        old_pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
        old_kdiv = (pll_con1 >> PLL36XX_KDIV_SHIFT) & PLL36XX_KDIV_MASK;

        return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
                rate->kdiv != old_kdiv);
}

static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 tmp, pll_con0, pll_con1;
        const struct samsung_pll_rate_table *rate;

        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con1 = readl_relaxed(pll->con_reg + 4);

        if (!(samsung_pll36xx_mpk_change(rate, pll_con0, pll_con1))) {
                /* If only s change, change just s value only*/
                pll_con0 &= ~(PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT);
                pll_con0 |= (rate->sdiv << PLL36XX_SDIV_SHIFT);
                writel_relaxed(pll_con0, pll->con_reg);

                return 0;
        }

        /* Set PLL lock time. */
        writel_relaxed(rate->pdiv * PLL36XX_LOCK_FACTOR, pll->lock_reg);

         /* Change PLL PMS values */
        pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) |
                        (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) |
                        (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT));
        pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) |
                        (rate->pdiv << PLL36XX_PDIV_SHIFT) |
                        (rate->sdiv << PLL36XX_SDIV_SHIFT);
        writel_relaxed(pll_con0, pll->con_reg);

        pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT);
        pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT;
        writel_relaxed(pll_con1, pll->con_reg + 4);

        /* wait_lock_time */
        if (pll_con0 & BIT(pll->enable_offs)) {
                do {
                        cpu_relax();
                        tmp = readl_relaxed(pll->con_reg);
                } while (!(tmp & BIT(pll->lock_offs)));
        }

        return 0;
}

static const struct clk_ops samsung_pll36xx_clk_ops = {
        .recalc_rate = samsung_pll36xx_recalc_rate,
        .set_rate = samsung_pll36xx_set_rate,
        .round_rate = samsung_pll_round_rate,
        .enable = samsung_pll3xxx_enable,
        .disable = samsung_pll3xxx_disable,
};

static const struct clk_ops samsung_pll36xx_clk_min_ops = {
        .recalc_rate = samsung_pll36xx_recalc_rate,
};

/*
 * PLL45xx Clock Type
 */
#define PLL4502_LOCK_FACTOR     400
#define PLL4508_LOCK_FACTOR     240

#define PLL45XX_MDIV_MASK       (0x3FF)
#define PLL45XX_PDIV_MASK       (0x3F)
#define PLL45XX_SDIV_MASK       (0x7)
#define PLL45XX_AFC_MASK        (0x1F)
#define PLL45XX_MDIV_SHIFT      (16)
#define PLL45XX_PDIV_SHIFT      (8)
#define PLL45XX_SDIV_SHIFT      (0)
#define PLL45XX_AFC_SHIFT       (0)

#define PLL45XX_ENABLE          BIT(31)
#define PLL45XX_LOCKED          BIT(29)

static unsigned long samsung_pll45xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
        pdiv = (pll_con >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
        sdiv = (pll_con >> PLL45XX_SDIV_SHIFT) & PLL45XX_SDIV_MASK;

        if (pll->type == pll_4508)
                sdiv = sdiv - 1;

        fvco *= mdiv;
        do_div(fvco, (pdiv << sdiv));

        return (unsigned long)fvco;
}

static bool samsung_pll45xx_mp_change(u32 pll_con0, u32 pll_con1,
                                const struct samsung_pll_rate_table *rate)
{
        u32 old_mdiv, old_pdiv, old_afc;

        old_mdiv = (pll_con0 >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
        old_pdiv = (pll_con0 >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
        old_afc = (pll_con1 >> PLL45XX_AFC_SHIFT) & PLL45XX_AFC_MASK;

        return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
                || old_afc != rate->afc);
}

static int samsung_pll45xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 con0, con1;
        ktime_t start;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        con0 = readl_relaxed(pll->con_reg);
        con1 = readl_relaxed(pll->con_reg + 0x4);

        if (!(samsung_pll45xx_mp_change(con0, con1, rate))) {
                /* If only s change, change just s value only*/
                con0 &= ~(PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT);
                con0 |= rate->sdiv << PLL45XX_SDIV_SHIFT;
                writel_relaxed(con0, pll->con_reg);

                return 0;
        }

        /* Set PLL PMS values. */
        con0 &= ~((PLL45XX_MDIV_MASK << PLL45XX_MDIV_SHIFT) |
                        (PLL45XX_PDIV_MASK << PLL45XX_PDIV_SHIFT) |
                        (PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT));
        con0 |= (rate->mdiv << PLL45XX_MDIV_SHIFT) |
                        (rate->pdiv << PLL45XX_PDIV_SHIFT) |
                        (rate->sdiv << PLL45XX_SDIV_SHIFT);

        /* Set PLL AFC value. */
        con1 = readl_relaxed(pll->con_reg + 0x4);
        con1 &= ~(PLL45XX_AFC_MASK << PLL45XX_AFC_SHIFT);
        con1 |= (rate->afc << PLL45XX_AFC_SHIFT);

        /* Set PLL lock time. */
        switch (pll->type) {
        case pll_4502:
                writel_relaxed(rate->pdiv * PLL4502_LOCK_FACTOR, pll->lock_reg);
                break;
        case pll_4508:
                writel_relaxed(rate->pdiv * PLL4508_LOCK_FACTOR, pll->lock_reg);
                break;
        default:
                break;
        }

        /* Set new configuration. */
        writel_relaxed(con1, pll->con_reg + 0x4);
        writel_relaxed(con0, pll->con_reg);

        /* Wait for locking. */
        start = ktime_get();
        while (!(readl_relaxed(pll->con_reg) & PLL45XX_LOCKED)) {
                ktime_t delta = ktime_sub(ktime_get(), start);

                if (ktime_to_ms(delta) > PLL_TIMEOUT_MS) {
                        pr_err("%s: could not lock PLL %s\n",
                                        __func__, clk_hw_get_name(hw));
                        return -EFAULT;
                }

                cpu_relax();
        }

        return 0;
}

static const struct clk_ops samsung_pll45xx_clk_ops = {
        .recalc_rate = samsung_pll45xx_recalc_rate,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_pll45xx_set_rate,
};

static const struct clk_ops samsung_pll45xx_clk_min_ops = {
        .recalc_rate = samsung_pll45xx_recalc_rate,
};

/*
 * PLL46xx Clock Type
 */
#define PLL46XX_LOCK_FACTOR     3000

#define PLL46XX_VSEL_MASK       (1)
#define PLL46XX_MDIV_MASK       (0x1FF)
#define PLL1460X_MDIV_MASK      (0x3FF)

#define PLL46XX_PDIV_MASK       (0x3F)
#define PLL46XX_SDIV_MASK       (0x7)
#define PLL46XX_VSEL_SHIFT      (27)
#define PLL46XX_MDIV_SHIFT      (16)
#define PLL46XX_PDIV_SHIFT      (8)
#define PLL46XX_SDIV_SHIFT      (0)

#define PLL46XX_KDIV_MASK       (0xFFFF)
#define PLL4650C_KDIV_MASK      (0xFFF)
#define PLL46XX_KDIV_SHIFT      (0)
#define PLL46XX_MFR_MASK        (0x3F)
#define PLL46XX_MRR_MASK        (0x1F)
#define PLL46XX_KDIV_SHIFT      (0)
#define PLL46XX_MFR_SHIFT       (16)
#define PLL46XX_MRR_SHIFT       (24)

#define PLL46XX_ENABLE          BIT(31)
#define PLL46XX_LOCKED          BIT(29)
#define PLL46XX_VSEL            BIT(27)

static unsigned long samsung_pll46xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1, shift;
        u64 fvco = parent_rate;

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con1 = readl_relaxed(pll->con_reg + 4);
        mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & ((pll->type == pll_1460x) ?
                                PLL1460X_MDIV_MASK : PLL46XX_MDIV_MASK);
        pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
        sdiv = (pll_con0 >> PLL46XX_SDIV_SHIFT) & PLL46XX_SDIV_MASK;
        kdiv = pll->type == pll_4650c ? pll_con1 & PLL4650C_KDIV_MASK :
                                        pll_con1 & PLL46XX_KDIV_MASK;

        shift = ((pll->type == pll_4600) || (pll->type == pll_1460x)) ? 16 : 10;

        fvco *= (mdiv << shift) + kdiv;
        do_div(fvco, (pdiv << sdiv));
        fvco >>= shift;

        return (unsigned long)fvco;
}

static bool samsung_pll46xx_mpk_change(u32 pll_con0, u32 pll_con1,
                                const struct samsung_pll_rate_table *rate)
{
        u32 old_mdiv, old_pdiv, old_kdiv;

        old_mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
        old_pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
        old_kdiv = (pll_con1 >> PLL46XX_KDIV_SHIFT) & PLL46XX_KDIV_MASK;

        return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
                || old_kdiv != rate->kdiv);
}

static int samsung_pll46xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 con0, con1, lock;
        ktime_t start;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        con0 = readl_relaxed(pll->con_reg);
        con1 = readl_relaxed(pll->con_reg + 0x4);

        if (!(samsung_pll46xx_mpk_change(con0, con1, rate))) {
                /* If only s change, change just s value only*/
                con0 &= ~(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT);
                con0 |= rate->sdiv << PLL46XX_SDIV_SHIFT;
                writel_relaxed(con0, pll->con_reg);

                return 0;
        }

        /* Set PLL lock time. */
        lock = rate->pdiv * PLL46XX_LOCK_FACTOR;
        if (lock > 0xffff)
                /* Maximum lock time bitfield is 16-bit. */
                lock = 0xffff;

        /* Set PLL PMS and VSEL values. */
        if (pll->type == pll_1460x) {
                con0 &= ~((PLL1460X_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
                        (PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
                        (PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT));
        } else {
                con0 &= ~((PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
                        (PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
                        (PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT) |
                        (PLL46XX_VSEL_MASK << PLL46XX_VSEL_SHIFT));
                con0 |= rate->vsel << PLL46XX_VSEL_SHIFT;
        }

        con0 |= (rate->mdiv << PLL46XX_MDIV_SHIFT) |
                        (rate->pdiv << PLL46XX_PDIV_SHIFT) |
                        (rate->sdiv << PLL46XX_SDIV_SHIFT);

        /* Set PLL K, MFR and MRR values. */
        con1 = readl_relaxed(pll->con_reg + 0x4);
        con1 &= ~((PLL46XX_KDIV_MASK << PLL46XX_KDIV_SHIFT) |
                        (PLL46XX_MFR_MASK << PLL46XX_MFR_SHIFT) |
                        (PLL46XX_MRR_MASK << PLL46XX_MRR_SHIFT));
        con1 |= (rate->kdiv << PLL46XX_KDIV_SHIFT) |
                        (rate->mfr << PLL46XX_MFR_SHIFT) |
                        (rate->mrr << PLL46XX_MRR_SHIFT);

        /* Write configuration to PLL */
        writel_relaxed(lock, pll->lock_reg);
        writel_relaxed(con0, pll->con_reg);
        writel_relaxed(con1, pll->con_reg + 0x4);

        /* Wait for locking. */
        start = ktime_get();
        while (!(readl_relaxed(pll->con_reg) & PLL46XX_LOCKED)) {
                ktime_t delta = ktime_sub(ktime_get(), start);

                if (ktime_to_ms(delta) > PLL_TIMEOUT_MS) {
                        pr_err("%s: could not lock PLL %s\n",
                                        __func__, clk_hw_get_name(hw));
                        return -EFAULT;
                }

                cpu_relax();
        }

        return 0;
}

static const struct clk_ops samsung_pll46xx_clk_ops = {
        .recalc_rate = samsung_pll46xx_recalc_rate,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_pll46xx_set_rate,
};

static const struct clk_ops samsung_pll46xx_clk_min_ops = {
        .recalc_rate = samsung_pll46xx_recalc_rate,
};

/*
 * PLL6552 Clock Type
 */

#define PLL6552_MDIV_MASK       0x3ff
#define PLL6552_PDIV_MASK       0x3f
#define PLL6552_SDIV_MASK       0x7
#define PLL6552_MDIV_SHIFT      16
#define PLL6552_MDIV_SHIFT_2416 14
#define PLL6552_PDIV_SHIFT      8
#define PLL6552_PDIV_SHIFT_2416 5
#define PLL6552_SDIV_SHIFT      0

static unsigned long samsung_pll6552_recalc_rate(struct clk_hw *hw,
                                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        if (pll->type == pll_6552_s3c2416) {
                mdiv = (pll_con >> PLL6552_MDIV_SHIFT_2416) & PLL6552_MDIV_MASK;
                pdiv = (pll_con >> PLL6552_PDIV_SHIFT_2416) & PLL6552_PDIV_MASK;
        } else {
                mdiv = (pll_con >> PLL6552_MDIV_SHIFT) & PLL6552_MDIV_MASK;
                pdiv = (pll_con >> PLL6552_PDIV_SHIFT) & PLL6552_PDIV_MASK;
        }
        sdiv = (pll_con >> PLL6552_SDIV_SHIFT) & PLL6552_SDIV_MASK;

        fvco *= mdiv;
        do_div(fvco, (pdiv << sdiv));

        return (unsigned long)fvco;
}

static const struct clk_ops samsung_pll6552_clk_ops = {
        .recalc_rate = samsung_pll6552_recalc_rate,
};

/*
 * PLL6553 Clock Type
 */

#define PLL6553_MDIV_MASK       0xff
#define PLL6553_PDIV_MASK       0x3f
#define PLL6553_SDIV_MASK       0x7
#define PLL6553_KDIV_MASK       0xffff
#define PLL6553_MDIV_SHIFT      16
#define PLL6553_PDIV_SHIFT      8
#define PLL6553_SDIV_SHIFT      0
#define PLL6553_KDIV_SHIFT      0

static unsigned long samsung_pll6553_recalc_rate(struct clk_hw *hw,
                                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1;
        u64 fvco = parent_rate;

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con1 = readl_relaxed(pll->con_reg + 0x4);
        mdiv = (pll_con0 >> PLL6553_MDIV_SHIFT) & PLL6553_MDIV_MASK;
        pdiv = (pll_con0 >> PLL6553_PDIV_SHIFT) & PLL6553_PDIV_MASK;
        sdiv = (pll_con0 >> PLL6553_SDIV_SHIFT) & PLL6553_SDIV_MASK;
        kdiv = (pll_con1 >> PLL6553_KDIV_SHIFT) & PLL6553_KDIV_MASK;

        fvco *= (mdiv << 16) + kdiv;
        do_div(fvco, (pdiv << sdiv));
        fvco >>= 16;

        return (unsigned long)fvco;
}

static const struct clk_ops samsung_pll6553_clk_ops = {
        .recalc_rate = samsung_pll6553_recalc_rate,
};

/*
 * PLL Clock Type of S3C24XX before S3C2443
 */

#define PLLS3C2410_MDIV_MASK            (0xff)
#define PLLS3C2410_PDIV_MASK            (0x1f)
#define PLLS3C2410_SDIV_MASK            (0x3)
#define PLLS3C2410_MDIV_SHIFT           (12)
#define PLLS3C2410_PDIV_SHIFT           (4)
#define PLLS3C2410_SDIV_SHIFT           (0)

#define PLLS3C2410_ENABLE_REG_OFFSET    0x10

static unsigned long samsung_s3c2410_pll_recalc_rate(struct clk_hw *hw,
                                        unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 pll_con, mdiv, pdiv, sdiv;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLLS3C2410_MDIV_SHIFT) & PLLS3C2410_MDIV_MASK;
        pdiv = (pll_con >> PLLS3C2410_PDIV_SHIFT) & PLLS3C2410_PDIV_MASK;
        sdiv = (pll_con >> PLLS3C2410_SDIV_SHIFT) & PLLS3C2410_SDIV_MASK;

        fvco *= (mdiv + 8);
        do_div(fvco, (pdiv + 2) << sdiv);

        return (unsigned int)fvco;
}

static unsigned long samsung_s3c2440_mpll_recalc_rate(struct clk_hw *hw,
                                        unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 pll_con, mdiv, pdiv, sdiv;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLLS3C2410_MDIV_SHIFT) & PLLS3C2410_MDIV_MASK;
        pdiv = (pll_con >> PLLS3C2410_PDIV_SHIFT) & PLLS3C2410_PDIV_MASK;
        sdiv = (pll_con >> PLLS3C2410_SDIV_SHIFT) & PLLS3C2410_SDIV_MASK;

        fvco *= (2 * (mdiv + 8));
        do_div(fvco, (pdiv + 2) << sdiv);

        return (unsigned int)fvco;
}

static int samsung_s3c2410_pll_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 tmp;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        tmp = readl_relaxed(pll->con_reg);

        /* Change PLL PMS values */
        tmp &= ~((PLLS3C2410_MDIV_MASK << PLLS3C2410_MDIV_SHIFT) |
                        (PLLS3C2410_PDIV_MASK << PLLS3C2410_PDIV_SHIFT) |
                        (PLLS3C2410_SDIV_MASK << PLLS3C2410_SDIV_SHIFT));
        tmp |= (rate->mdiv << PLLS3C2410_MDIV_SHIFT) |
                        (rate->pdiv << PLLS3C2410_PDIV_SHIFT) |
                        (rate->sdiv << PLLS3C2410_SDIV_SHIFT);
        writel_relaxed(tmp, pll->con_reg);

        /* Time to settle according to the manual */
        udelay(300);

        return 0;
}

static int samsung_s3c2410_pll_enable(struct clk_hw *hw, int bit, bool enable)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 pll_en = readl_relaxed(pll->lock_reg + PLLS3C2410_ENABLE_REG_OFFSET);
        u32 pll_en_orig = pll_en;

        if (enable)
                pll_en &= ~BIT(bit);
        else
                pll_en |= BIT(bit);

        writel_relaxed(pll_en, pll->lock_reg + PLLS3C2410_ENABLE_REG_OFFSET);

        /* if we started the UPLL, then allow to settle */
        if (enable && (pll_en_orig & BIT(bit)))
                udelay(300);

        return 0;
}

static int samsung_s3c2410_mpll_enable(struct clk_hw *hw)
{
        return samsung_s3c2410_pll_enable(hw, 5, true);
}

static void samsung_s3c2410_mpll_disable(struct clk_hw *hw)
{
        samsung_s3c2410_pll_enable(hw, 5, false);
}

static int samsung_s3c2410_upll_enable(struct clk_hw *hw)
{
        return samsung_s3c2410_pll_enable(hw, 7, true);
}

static void samsung_s3c2410_upll_disable(struct clk_hw *hw)
{
        samsung_s3c2410_pll_enable(hw, 7, false);
}

static const struct clk_ops samsung_s3c2410_mpll_clk_min_ops = {
        .recalc_rate = samsung_s3c2410_pll_recalc_rate,
        .enable = samsung_s3c2410_mpll_enable,
        .disable = samsung_s3c2410_mpll_disable,
};

static const struct clk_ops samsung_s3c2410_upll_clk_min_ops = {
        .recalc_rate = samsung_s3c2410_pll_recalc_rate,
        .enable = samsung_s3c2410_upll_enable,
        .disable = samsung_s3c2410_upll_disable,
};

static const struct clk_ops samsung_s3c2440_mpll_clk_min_ops = {
        .recalc_rate = samsung_s3c2440_mpll_recalc_rate,
        .enable = samsung_s3c2410_mpll_enable,
        .disable = samsung_s3c2410_mpll_disable,
};

static const struct clk_ops samsung_s3c2410_mpll_clk_ops = {
        .recalc_rate = samsung_s3c2410_pll_recalc_rate,
        .enable = samsung_s3c2410_mpll_enable,
        .disable = samsung_s3c2410_mpll_disable,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_s3c2410_pll_set_rate,
};

static const struct clk_ops samsung_s3c2410_upll_clk_ops = {
        .recalc_rate = samsung_s3c2410_pll_recalc_rate,
        .enable = samsung_s3c2410_upll_enable,
        .disable = samsung_s3c2410_upll_disable,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_s3c2410_pll_set_rate,
};

static const struct clk_ops samsung_s3c2440_mpll_clk_ops = {
        .recalc_rate = samsung_s3c2440_mpll_recalc_rate,
        .enable = samsung_s3c2410_mpll_enable,
        .disable = samsung_s3c2410_mpll_disable,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_s3c2410_pll_set_rate,
};

/*
 * PLL2550x Clock Type
 */

#define PLL2550X_R_MASK       (0x1)
#define PLL2550X_P_MASK       (0x3F)
#define PLL2550X_M_MASK       (0x3FF)
#define PLL2550X_S_MASK       (0x7)
#define PLL2550X_R_SHIFT      (20)
#define PLL2550X_P_SHIFT      (14)
#define PLL2550X_M_SHIFT      (4)
#define PLL2550X_S_SHIFT      (0)

static unsigned long samsung_pll2550x_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 r, p, m, s, pll_stat;
        u64 fvco = parent_rate;

        pll_stat = readl_relaxed(pll->con_reg);
        r = (pll_stat >> PLL2550X_R_SHIFT) & PLL2550X_R_MASK;
        if (!r)
                return 0;
        p = (pll_stat >> PLL2550X_P_SHIFT) & PLL2550X_P_MASK;
        m = (pll_stat >> PLL2550X_M_SHIFT) & PLL2550X_M_MASK;
        s = (pll_stat >> PLL2550X_S_SHIFT) & PLL2550X_S_MASK;

        fvco *= m;
        do_div(fvco, (p << s));

        return (unsigned long)fvco;
}

static const struct clk_ops samsung_pll2550x_clk_ops = {
        .recalc_rate = samsung_pll2550x_recalc_rate,
};

/*
 * PLL2550xx Clock Type
 */

/* Maximum lock time can be 270 * PDIV cycles */
#define PLL2550XX_LOCK_FACTOR 270

#define PLL2550XX_M_MASK                0x3FF
#define PLL2550XX_P_MASK                0x3F
#define PLL2550XX_S_MASK                0x7
#define PLL2550XX_LOCK_STAT_MASK        0x1
#define PLL2550XX_M_SHIFT               9
#define PLL2550XX_P_SHIFT               3
#define PLL2550XX_S_SHIFT               0
#define PLL2550XX_LOCK_STAT_SHIFT       21

static unsigned long samsung_pll2550xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con;
        u64 fvco = parent_rate;

        pll_con = readl_relaxed(pll->con_reg);
        mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
        pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;
        sdiv = (pll_con >> PLL2550XX_S_SHIFT) & PLL2550XX_S_MASK;

        fvco *= mdiv;
        do_div(fvco, (pdiv << sdiv));

        return (unsigned long)fvco;
}

static inline bool samsung_pll2550xx_mp_change(u32 mdiv, u32 pdiv, u32 pll_con)
{
        u32 old_mdiv, old_pdiv;

        old_mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
        old_pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;

        return mdiv != old_mdiv || pdiv != old_pdiv;
}

static int samsung_pll2550xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 tmp;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        tmp = readl_relaxed(pll->con_reg);

        if (!(samsung_pll2550xx_mp_change(rate->mdiv, rate->pdiv, tmp))) {
                /* If only s change, change just s value only*/
                tmp &= ~(PLL2550XX_S_MASK << PLL2550XX_S_SHIFT);
                tmp |= rate->sdiv << PLL2550XX_S_SHIFT;
                writel_relaxed(tmp, pll->con_reg);

                return 0;
        }

        /* Set PLL lock time. */
        writel_relaxed(rate->pdiv * PLL2550XX_LOCK_FACTOR, pll->lock_reg);

        /* Change PLL PMS values */
        tmp &= ~((PLL2550XX_M_MASK << PLL2550XX_M_SHIFT) |
                        (PLL2550XX_P_MASK << PLL2550XX_P_SHIFT) |
                        (PLL2550XX_S_MASK << PLL2550XX_S_SHIFT));
        tmp |= (rate->mdiv << PLL2550XX_M_SHIFT) |
                        (rate->pdiv << PLL2550XX_P_SHIFT) |
                        (rate->sdiv << PLL2550XX_S_SHIFT);
        writel_relaxed(tmp, pll->con_reg);

        /* wait_lock_time */
        do {
                cpu_relax();
                tmp = readl_relaxed(pll->con_reg);
        } while (!(tmp & (PLL2550XX_LOCK_STAT_MASK
                        << PLL2550XX_LOCK_STAT_SHIFT)));

        return 0;
}

static const struct clk_ops samsung_pll2550xx_clk_ops = {
        .recalc_rate = samsung_pll2550xx_recalc_rate,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_pll2550xx_set_rate,
};

static const struct clk_ops samsung_pll2550xx_clk_min_ops = {
        .recalc_rate = samsung_pll2550xx_recalc_rate,
};

/*
 * PLL2650x Clock Type
 */

/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL2650X_LOCK_FACTOR            3000

#define PLL2650X_M_MASK                 0x1ff
#define PLL2650X_P_MASK                 0x3f
#define PLL2650X_S_MASK                 0x7
#define PLL2650X_K_MASK                 0xffff
#define PLL2650X_LOCK_STAT_MASK         0x1
#define PLL2650X_M_SHIFT                16
#define PLL2650X_P_SHIFT                8
#define PLL2650X_S_SHIFT                0
#define PLL2650X_K_SHIFT                0
#define PLL2650X_LOCK_STAT_SHIFT        29
#define PLL2650X_PLL_ENABLE_SHIFT       31

static unsigned long samsung_pll2650x_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u64 fout = parent_rate;
        u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
        s16 kdiv;

        pll_con0 = readl_relaxed(pll->con_reg);
        mdiv = (pll_con0 >> PLL2650X_M_SHIFT) & PLL2650X_M_MASK;
        pdiv = (pll_con0 >> PLL2650X_P_SHIFT) & PLL2650X_P_MASK;
        sdiv = (pll_con0 >> PLL2650X_S_SHIFT) & PLL2650X_S_MASK;

        pll_con1 = readl_relaxed(pll->con_reg + 4);
        kdiv = (s16)((pll_con1 >> PLL2650X_K_SHIFT) & PLL2650X_K_MASK);

        fout *= (mdiv << 16) + kdiv;
        do_div(fout, (pdiv << sdiv));
        fout >>= 16;

        return (unsigned long)fout;
}

static int samsung_pll2650x_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long prate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        const struct samsung_pll_rate_table *rate;
        u32 con0, con1;

        /* Get required rate settings from table */
        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        con0 = readl_relaxed(pll->con_reg);
        con1 = readl_relaxed(pll->con_reg + 4);

        /* Set PLL lock time. */
        writel_relaxed(rate->pdiv * PLL2650X_LOCK_FACTOR, pll->lock_reg);

        /* Change PLL PMS values */
        con0 &= ~((PLL2650X_M_MASK << PLL2650X_M_SHIFT) |
                        (PLL2650X_P_MASK << PLL2650X_P_SHIFT) |
                        (PLL2650X_S_MASK << PLL2650X_S_SHIFT));
        con0 |= (rate->mdiv << PLL2650X_M_SHIFT) |
                        (rate->pdiv << PLL2650X_P_SHIFT) |
                        (rate->sdiv << PLL2650X_S_SHIFT);
        con0 |= (1 << PLL2650X_PLL_ENABLE_SHIFT);
        writel_relaxed(con0, pll->con_reg);

        con1 &= ~(PLL2650X_K_MASK << PLL2650X_K_SHIFT);
        con1 |= ((rate->kdiv & PLL2650X_K_MASK) << PLL2650X_K_SHIFT);
        writel_relaxed(con1, pll->con_reg + 4);

        do {
                cpu_relax();
                con0 = readl_relaxed(pll->con_reg);
        } while (!(con0 & (PLL2650X_LOCK_STAT_MASK
                        << PLL2650X_LOCK_STAT_SHIFT)));

        return 0;
}

static const struct clk_ops samsung_pll2650x_clk_ops = {
        .recalc_rate = samsung_pll2650x_recalc_rate,
        .round_rate = samsung_pll_round_rate,
        .set_rate = samsung_pll2650x_set_rate,
};

static const struct clk_ops samsung_pll2650x_clk_min_ops = {
        .recalc_rate = samsung_pll2650x_recalc_rate,
};

/*
 * PLL2650XX Clock Type
 */

/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL2650XX_LOCK_FACTOR 3000

#define PLL2650XX_MDIV_SHIFT            9
#define PLL2650XX_PDIV_SHIFT            3
#define PLL2650XX_SDIV_SHIFT            0
#define PLL2650XX_KDIV_SHIFT            0
#define PLL2650XX_MDIV_MASK             0x1ff
#define PLL2650XX_PDIV_MASK             0x3f
#define PLL2650XX_SDIV_MASK             0x7
#define PLL2650XX_KDIV_MASK             0xffff
#define PLL2650XX_PLL_ENABLE_SHIFT      23
#define PLL2650XX_PLL_LOCKTIME_SHIFT    21
#define PLL2650XX_PLL_FOUTMASK_SHIFT    31

static unsigned long samsung_pll2650xx_recalc_rate(struct clk_hw *hw,
                                unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 mdiv, pdiv, sdiv, pll_con0, pll_con2;
        s16 kdiv;
        u64 fvco = parent_rate;

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con2 = readl_relaxed(pll->con_reg + 8);
        mdiv = (pll_con0 >> PLL2650XX_MDIV_SHIFT) & PLL2650XX_MDIV_MASK;
        pdiv = (pll_con0 >> PLL2650XX_PDIV_SHIFT) & PLL2650XX_PDIV_MASK;
        sdiv = (pll_con0 >> PLL2650XX_SDIV_SHIFT) & PLL2650XX_SDIV_MASK;
        kdiv = (s16)(pll_con2 & PLL2650XX_KDIV_MASK);

        fvco *= (mdiv << 16) + kdiv;
        do_div(fvco, (pdiv << sdiv));
        fvco >>= 16;

        return (unsigned long)fvco;
}

static int samsung_pll2650xx_set_rate(struct clk_hw *hw, unsigned long drate,
                                        unsigned long parent_rate)
{
        struct samsung_clk_pll *pll = to_clk_pll(hw);
        u32 tmp, pll_con0, pll_con2;
        const struct samsung_pll_rate_table *rate;

        rate = samsung_get_pll_settings(pll, drate);
        if (!rate) {
                pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
                        drate, clk_hw_get_name(hw));
                return -EINVAL;
        }

        pll_con0 = readl_relaxed(pll->con_reg);
        pll_con2 = readl_relaxed(pll->con_reg + 8);

         /* Change PLL PMS values */
        pll_con0 &= ~(PLL2650XX_MDIV_MASK << PLL2650XX_MDIV_SHIFT |
                        PLL2650XX_PDIV_MASK << PLL2650XX_PDIV_SHIFT |
                        PLL2650XX_SDIV_MASK << PLL2650XX_SDIV_SHIFT);
        pll_con0 |= rate->mdiv << PLL2650XX_MDIV_SHIFT;
        pll_con0 |= rate->pdiv << PLL2650XX_PDIV_SHIFT;
        pll_con0 |= rate->sdiv << PLL2650XX_SDIV_SHIFT;
        pll_con0 |= 1 << PLL2650XX_PLL_ENABLE_SHIFT;
        pll_con0 |= 1 << PLL2650XX_PLL_FOUTMASK_SHIFT;

        pll_con2 &= ~(PLL2650XX_KDIV_MASK << PLL2650XX_KDIV_SHIFT);
        pll_con2 |= ((~(rate->kdiv) + 1) & PLL2650XX_KDIV_MASK)
                        << PLL2650XX_KDIV_SHIFT;

        /* Set PLL lock time. */
        writel_relaxed(PLL2650XX_LOCK_FACTOR * rate->pdiv, pll->lock_reg);

        writel_relaxed(pll_con0, pll->con_reg);
        writel_relaxed(pll_con2, pll->con_reg + 8);

        do {
                tmp = readl_relaxed(pll->con_reg);
        } while (!(tmp & (0x1 << PLL2650XX_PLL_LOCKTIME_SHIFT)));

        return 0;
}

static const struct clk_ops samsung_pll2650xx_clk_ops = {
        .recalc_rate = samsung_pll2650xx_recalc_rate,
        .set_rate = samsung_pll2650xx_set_rate,
        .round_rate = samsung_pll_round_rate,
};

static const struct clk_ops samsung_pll2650xx_clk_min_ops = {
        .recalc_rate = samsung_pll2650xx_recalc_rate,
};

static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
                                const struct samsung_pll_clock *pll_clk,
                                void __iomem *base)
{
        struct samsung_clk_pll *pll;
        struct clk_init_data init;
        int ret, len;

        pll = kzalloc(sizeof(*pll), GFP_KERNEL);
        if (!pll) {
                pr_err("%s: could not allocate pll clk %s\n",
                        __func__, pll_clk->name);
                return;
        }

        init.name = pll_clk->name;
        init.flags = pll_clk->flags;
        init.parent_names = &pll_clk->parent_name;
        init.num_parents = 1;

        if (pll_clk->rate_table) {
                /* find count of rates in rate_table */
                for (len = 0; pll_clk->rate_table[len].rate != 0; )
                        len++;

                pll->rate_count = len;
                pll->rate_table = kmemdup(pll_clk->rate_table,
                                        pll->rate_count *
                                        sizeof(struct samsung_pll_rate_table),
                                        GFP_KERNEL);
                WARN(!pll->rate_table,
                        "%s: could not allocate rate table for %s\n",
                        __func__, pll_clk->name);
        }

        switch (pll_clk->type) {
        case pll_2126:
                init.ops = &samsung_pll2126_clk_ops;
                break;
        case pll_3000:
                init.ops = &samsung_pll3000_clk_ops;
                break;
        /* clk_ops for 35xx and 2550 are similar */
        case pll_35xx:
        case pll_2550:
        case pll_1450x:
        case pll_1451x:
        case pll_1452x:
                pll->enable_offs = PLL35XX_ENABLE_SHIFT;
                pll->lock_offs = PLL35XX_LOCK_STAT_SHIFT;
                if (!pll->rate_table)
                        init.ops = &samsung_pll35xx_clk_min_ops;
                else
                        init.ops = &samsung_pll35xx_clk_ops;
                break;
        case pll_4500:
                init.ops = &samsung_pll45xx_clk_min_ops;
                break;
        case pll_4502:
        case pll_4508:
                if (!pll->rate_table)
                        init.ops = &samsung_pll45xx_clk_min_ops;
                else
                        init.ops = &samsung_pll45xx_clk_ops;
                break;
        /* clk_ops for 36xx and 2650 are similar */
        case pll_36xx:
        case pll_2650:
                pll->enable_offs = PLL36XX_ENABLE_SHIFT;
                pll->lock_offs = PLL36XX_LOCK_STAT_SHIFT;
                if (!pll->rate_table)
                        init.ops = &samsung_pll36xx_clk_min_ops;
                else
                        init.ops = &samsung_pll36xx_clk_ops;
                break;
        case pll_6552:
        case pll_6552_s3c2416:
                init.ops = &samsung_pll6552_clk_ops;
                break;
        case pll_6553:
                init.ops = &samsung_pll6553_clk_ops;
                break;
        case pll_4600:
        case pll_4650:
        case pll_4650c:
        case pll_1460x:
                if (!pll->rate_table)
                        init.ops = &samsung_pll46xx_clk_min_ops;
                else
                        init.ops = &samsung_pll46xx_clk_ops;
                break;
        case pll_s3c2410_mpll:
                if (!pll->rate_table)
                        init.ops = &samsung_s3c2410_mpll_clk_min_ops;
                else
                        init.ops = &samsung_s3c2410_mpll_clk_ops;
                break;
        case pll_s3c2410_upll:
                if (!pll->rate_table)
                        init.ops = &samsung_s3c2410_upll_clk_min_ops;
                else
                        init.ops = &samsung_s3c2410_upll_clk_ops;
                break;
        case pll_s3c2440_mpll:
                if (!pll->rate_table)
                        init.ops = &samsung_s3c2440_mpll_clk_min_ops;
                else
                        init.ops = &samsung_s3c2440_mpll_clk_ops;
                break;
        case pll_2550x:
                init.ops = &samsung_pll2550x_clk_ops;
                break;
        case pll_2550xx:
                if (!pll->rate_table)
                        init.ops = &samsung_pll2550xx_clk_min_ops;
                else
                        init.ops = &samsung_pll2550xx_clk_ops;
                break;
        case pll_2650x:
                if (!pll->rate_table)
                        init.ops = &samsung_pll2650x_clk_min_ops;
                else
                        init.ops = &samsung_pll2650x_clk_ops;
                break;
        case pll_2650xx:
                if (!pll->rate_table)
                        init.ops = &samsung_pll2650xx_clk_min_ops;
                else
                        init.ops = &samsung_pll2650xx_clk_ops;
                break;
        default:
                pr_warn("%s: Unknown pll type for pll clk %s\n",
                        __func__, pll_clk->name);
        }

        pll->hw.init = &init;
        pll->type = pll_clk->type;
        pll->lock_reg = base + pll_clk->lock_offset;
        pll->con_reg = base + pll_clk->con_offset;

        ret = clk_hw_register(NULL, &pll->hw);
        if (ret) {
                pr_err("%s: failed to register pll clock %s : %d\n",
                        __func__, pll_clk->name, ret);
                kfree(pll);
                return;
        }

        samsung_clk_add_lookup(ctx, &pll->hw, pll_clk->id);

        if (!pll_clk->alias)
                return;

        ret = clk_hw_register_clkdev(&pll->hw, pll_clk->alias,
                                     pll_clk->dev_name);
        if (ret)
                pr_err("%s: failed to register lookup for %s : %d",
                        __func__, pll_clk->name, ret);
}

void __init samsung_clk_register_pll(struct samsung_clk_provider *ctx,
                        const struct samsung_pll_clock *pll_list,
                        unsigned int nr_pll, void __iomem *base)
{
        int cnt;

        for (cnt = 0; cnt < nr_pll; cnt++)
                _samsung_clk_register_pll(ctx, &pll_list[cnt], base);
}