Merge remote-tracking branches 'asoc/topic/wm8904', 'asoc/topic/wm8955' and 'asoc...

[mirror_ubuntu-zesty-kernel.git] / drivers / thermal / samsung / exynos_tmu.c

/*
 * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
 *
 *  Copyright (C) 2014 Samsung Electronics
 *  Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
 *  Lukasz Majewski <l.majewski@samsung.com>
 *
 *  Copyright (C) 2011 Samsung Electronics
 *  Donggeun Kim <dg77.kim@samsung.com>
 *  Amit Daniel Kachhap <amit.kachhap@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>

#include "exynos_tmu.h"
#include "../thermal_core.h"

/* Exynos generic registers */
#define EXYNOS_TMU_REG_TRIMINFO         0x0
#define EXYNOS_TMU_REG_CONTROL          0x20
#define EXYNOS_TMU_REG_STATUS           0x28
#define EXYNOS_TMU_REG_CURRENT_TEMP     0x40
#define EXYNOS_TMU_REG_INTEN            0x70
#define EXYNOS_TMU_REG_INTSTAT          0x74
#define EXYNOS_TMU_REG_INTCLEAR         0x78

#define EXYNOS_TMU_TEMP_MASK            0xff
#define EXYNOS_TMU_REF_VOLTAGE_SHIFT    24
#define EXYNOS_TMU_REF_VOLTAGE_MASK     0x1f
#define EXYNOS_TMU_BUF_SLOPE_SEL_MASK   0xf
#define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT  8
#define EXYNOS_TMU_CORE_EN_SHIFT        0

/* Exynos3250 specific registers */
#define EXYNOS_TMU_TRIMINFO_CON1        0x10

/* Exynos4210 specific registers */
#define EXYNOS4210_TMU_REG_THRESHOLD_TEMP       0x44
#define EXYNOS4210_TMU_REG_TRIG_LEVEL0  0x50

/* Exynos5250, Exynos4412, Exynos3250 specific registers */
#define EXYNOS_TMU_TRIMINFO_CON2        0x14
#define EXYNOS_THD_TEMP_RISE            0x50
#define EXYNOS_THD_TEMP_FALL            0x54
#define EXYNOS_EMUL_CON         0x80

#define EXYNOS_TRIMINFO_RELOAD_ENABLE   1
#define EXYNOS_TRIMINFO_25_SHIFT        0
#define EXYNOS_TRIMINFO_85_SHIFT        8
#define EXYNOS_TMU_TRIP_MODE_SHIFT      13
#define EXYNOS_TMU_TRIP_MODE_MASK       0x7
#define EXYNOS_TMU_THERM_TRIP_EN_SHIFT  12

#define EXYNOS_TMU_INTEN_RISE0_SHIFT    0
#define EXYNOS_TMU_INTEN_RISE1_SHIFT    4
#define EXYNOS_TMU_INTEN_RISE2_SHIFT    8
#define EXYNOS_TMU_INTEN_RISE3_SHIFT    12
#define EXYNOS_TMU_INTEN_FALL0_SHIFT    16

#define EXYNOS_EMUL_TIME        0x57F0
#define EXYNOS_EMUL_TIME_MASK   0xffff
#define EXYNOS_EMUL_TIME_SHIFT  16
#define EXYNOS_EMUL_DATA_SHIFT  8
#define EXYNOS_EMUL_DATA_MASK   0xFF
#define EXYNOS_EMUL_ENABLE      0x1

/* Exynos5260 specific */
#define EXYNOS5260_TMU_REG_INTEN                0xC0
#define EXYNOS5260_TMU_REG_INTSTAT              0xC4
#define EXYNOS5260_TMU_REG_INTCLEAR             0xC8
#define EXYNOS5260_EMUL_CON                     0x100

/* Exynos4412 specific */
#define EXYNOS4412_MUX_ADDR_VALUE          6
#define EXYNOS4412_MUX_ADDR_SHIFT          20

/* Exynos5433 specific registers */
#define EXYNOS5433_TMU_REG_CONTROL1             0x024
#define EXYNOS5433_TMU_SAMPLING_INTERVAL        0x02c
#define EXYNOS5433_TMU_COUNTER_VALUE0           0x030
#define EXYNOS5433_TMU_COUNTER_VALUE1           0x034
#define EXYNOS5433_TMU_REG_CURRENT_TEMP1        0x044
#define EXYNOS5433_THD_TEMP_RISE3_0             0x050
#define EXYNOS5433_THD_TEMP_RISE7_4             0x054
#define EXYNOS5433_THD_TEMP_FALL3_0             0x060
#define EXYNOS5433_THD_TEMP_FALL7_4             0x064
#define EXYNOS5433_TMU_REG_INTEN                0x0c0
#define EXYNOS5433_TMU_REG_INTPEND              0x0c8
#define EXYNOS5433_TMU_EMUL_CON                 0x110
#define EXYNOS5433_TMU_PD_DET_EN                0x130

#define EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT     16
#define EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT     23
#define EXYNOS5433_TRIMINFO_SENSOR_ID_MASK      \
                        (0xf << EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT)
#define EXYNOS5433_TRIMINFO_CALIB_SEL_MASK      BIT(23)

#define EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING  0
#define EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING  1

#define EXYNOS5433_PD_DET_EN                    1

/*exynos5440 specific registers*/
#define EXYNOS5440_TMU_S0_7_TRIM                0x000
#define EXYNOS5440_TMU_S0_7_CTRL                0x020
#define EXYNOS5440_TMU_S0_7_DEBUG               0x040
#define EXYNOS5440_TMU_S0_7_TEMP                0x0f0
#define EXYNOS5440_TMU_S0_7_TH0                 0x110
#define EXYNOS5440_TMU_S0_7_TH1                 0x130
#define EXYNOS5440_TMU_S0_7_TH2                 0x150
#define EXYNOS5440_TMU_S0_7_IRQEN               0x210
#define EXYNOS5440_TMU_S0_7_IRQ                 0x230
/* exynos5440 common registers */
#define EXYNOS5440_TMU_IRQ_STATUS               0x000
#define EXYNOS5440_TMU_PMIN                     0x004

#define EXYNOS5440_TMU_INTEN_RISE0_SHIFT        0
#define EXYNOS5440_TMU_INTEN_RISE1_SHIFT        1
#define EXYNOS5440_TMU_INTEN_RISE2_SHIFT        2
#define EXYNOS5440_TMU_INTEN_RISE3_SHIFT        3
#define EXYNOS5440_TMU_INTEN_FALL0_SHIFT        4
#define EXYNOS5440_TMU_TH_RISE4_SHIFT           24
#define EXYNOS5440_EFUSE_SWAP_OFFSET            8

/* Exynos7 specific registers */
#define EXYNOS7_THD_TEMP_RISE7_6                0x50
#define EXYNOS7_THD_TEMP_FALL7_6                0x60
#define EXYNOS7_TMU_REG_INTEN                   0x110
#define EXYNOS7_TMU_REG_INTPEND                 0x118
#define EXYNOS7_TMU_REG_EMUL_CON                0x160

#define EXYNOS7_TMU_TEMP_MASK                   0x1ff
#define EXYNOS7_PD_DET_EN_SHIFT                 23
#define EXYNOS7_TMU_INTEN_RISE0_SHIFT           0
#define EXYNOS7_TMU_INTEN_RISE1_SHIFT           1
#define EXYNOS7_TMU_INTEN_RISE2_SHIFT           2
#define EXYNOS7_TMU_INTEN_RISE3_SHIFT           3
#define EXYNOS7_TMU_INTEN_RISE4_SHIFT           4
#define EXYNOS7_TMU_INTEN_RISE5_SHIFT           5
#define EXYNOS7_TMU_INTEN_RISE6_SHIFT           6
#define EXYNOS7_TMU_INTEN_RISE7_SHIFT           7
#define EXYNOS7_EMUL_DATA_SHIFT                 7
#define EXYNOS7_EMUL_DATA_MASK                  0x1ff

#define MCELSIUS        1000
/**
 * struct exynos_tmu_data : A structure to hold the private data of the TMU
        driver
 * @id: identifier of the one instance of the TMU controller.
 * @pdata: pointer to the tmu platform/configuration data
 * @base: base address of the single instance of the TMU controller.
 * @base_second: base address of the common registers of the TMU controller.
 * @irq: irq number of the TMU controller.
 * @soc: id of the SOC type.
 * @irq_work: pointer to the irq work structure.
 * @lock: lock to implement synchronization.
 * @clk: pointer to the clock structure.
 * @clk_sec: pointer to the clock structure for accessing the base_second.
 * @sclk: pointer to the clock structure for accessing the tmu special clk.
 * @temp_error1: fused value of the first point trim.
 * @temp_error2: fused value of the second point trim.
 * @regulator: pointer to the TMU regulator structure.
 * @reg_conf: pointer to structure to register with core thermal.
 * @tmu_initialize: SoC specific TMU initialization method
 * @tmu_control: SoC specific TMU control method
 * @tmu_read: SoC specific TMU temperature read method
 * @tmu_set_emulation: SoC specific TMU emulation setting method
 * @tmu_clear_irqs: SoC specific TMU interrupts clearing method
 */
struct exynos_tmu_data {
        int id;
        struct exynos_tmu_platform_data *pdata;
        void __iomem *base;
        void __iomem *base_second;
        int irq;
        enum soc_type soc;
        struct work_struct irq_work;
        struct mutex lock;
        struct clk *clk, *clk_sec, *sclk;
        u16 temp_error1, temp_error2;
        struct regulator *regulator;
        struct thermal_zone_device *tzd;

        int (*tmu_initialize)(struct platform_device *pdev);
        void (*tmu_control)(struct platform_device *pdev, bool on);
        int (*tmu_read)(struct exynos_tmu_data *data);
        void (*tmu_set_emulation)(struct exynos_tmu_data *data, int temp);
        void (*tmu_clear_irqs)(struct exynos_tmu_data *data);
};

static void exynos_report_trigger(struct exynos_tmu_data *p)
{
        char data[10], *envp[] = { data, NULL };
        struct thermal_zone_device *tz = p->tzd;
        int temp;
        unsigned int i;

        if (!tz) {
                pr_err("No thermal zone device defined\n");
                return;
        }

        thermal_zone_device_update(tz);

        mutex_lock(&tz->lock);
        /* Find the level for which trip happened */
        for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
                tz->ops->get_trip_temp(tz, i, &temp);
                if (tz->last_temperature < temp)
                        break;
        }

        snprintf(data, sizeof(data), "%u", i);
        kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, envp);
        mutex_unlock(&tz->lock);
}

/*
 * TMU treats temperature as a mapped temperature code.
 * The temperature is converted differently depending on the calibration type.
 */
static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
{
        struct exynos_tmu_platform_data *pdata = data->pdata;
        int temp_code;

        switch (pdata->cal_type) {
        case TYPE_TWO_POINT_TRIMMING:
                temp_code = (temp - pdata->first_point_trim) *
                        (data->temp_error2 - data->temp_error1) /
                        (pdata->second_point_trim - pdata->first_point_trim) +
                        data->temp_error1;
                break;
        case TYPE_ONE_POINT_TRIMMING:
                temp_code = temp + data->temp_error1 - pdata->first_point_trim;
                break;
        default:
                temp_code = temp + pdata->default_temp_offset;
                break;
        }

        return temp_code;
}

/*
 * Calculate a temperature value from a temperature code.
 * The unit of the temperature is degree Celsius.
 */
static int code_to_temp(struct exynos_tmu_data *data, u16 temp_code)
{
        struct exynos_tmu_platform_data *pdata = data->pdata;
        int temp;

        switch (pdata->cal_type) {
        case TYPE_TWO_POINT_TRIMMING:
                temp = (temp_code - data->temp_error1) *
                        (pdata->second_point_trim - pdata->first_point_trim) /
                        (data->temp_error2 - data->temp_error1) +
                        pdata->first_point_trim;
                break;
        case TYPE_ONE_POINT_TRIMMING:
                temp = temp_code - data->temp_error1 + pdata->first_point_trim;
                break;
        default:
                temp = temp_code - pdata->default_temp_offset;
                break;
        }

        return temp;
}

static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
{
        struct exynos_tmu_platform_data *pdata = data->pdata;

        data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
        data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) &
                                EXYNOS_TMU_TEMP_MASK);

        if (!data->temp_error1 ||
                (pdata->min_efuse_value > data->temp_error1) ||
                (data->temp_error1 > pdata->max_efuse_value))
                data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;

        if (!data->temp_error2)
                data->temp_error2 =
                        (pdata->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) &
                        EXYNOS_TMU_TEMP_MASK;
}

static u32 get_th_reg(struct exynos_tmu_data *data, u32 threshold, bool falling)
{
        struct thermal_zone_device *tz = data->tzd;
        const struct thermal_trip * const trips =
                of_thermal_get_trip_points(tz);
        unsigned long temp;
        int i;

        if (!trips) {
                pr_err("%s: Cannot get trip points from of-thermal.c!\n",
                       __func__);
                return 0;
        }

        for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
                if (trips[i].type == THERMAL_TRIP_CRITICAL)
                        continue;

                temp = trips[i].temperature / MCELSIUS;
                if (falling)
                        temp -= (trips[i].hysteresis / MCELSIUS);
                else
                        threshold &= ~(0xff << 8 * i);

                threshold |= temp_to_code(data, temp) << 8 * i;
        }

        return threshold;
}

static int exynos_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        int ret;

        mutex_lock(&data->lock);
        clk_enable(data->clk);
        if (!IS_ERR(data->clk_sec))
                clk_enable(data->clk_sec);
        ret = data->tmu_initialize(pdev);
        clk_disable(data->clk);
        mutex_unlock(&data->lock);
        if (!IS_ERR(data->clk_sec))
                clk_disable(data->clk_sec);

        return ret;
}

static u32 get_con_reg(struct exynos_tmu_data *data, u32 con)
{
        struct exynos_tmu_platform_data *pdata = data->pdata;

        if (data->soc == SOC_ARCH_EXYNOS4412 ||
            data->soc == SOC_ARCH_EXYNOS3250)
                con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);

        con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT);
        con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;

        con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
        con |= (pdata->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);

        if (pdata->noise_cancel_mode) {
                con &= ~(EXYNOS_TMU_TRIP_MODE_MASK << EXYNOS_TMU_TRIP_MODE_SHIFT);
                con |= (pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT);
        }

        return con;
}

static void exynos_tmu_control(struct platform_device *pdev, bool on)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);

        mutex_lock(&data->lock);
        clk_enable(data->clk);
        data->tmu_control(pdev, on);
        clk_disable(data->clk);
        mutex_unlock(&data->lock);
}

static int exynos4210_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        const struct thermal_trip * const trips =
                of_thermal_get_trip_points(tz);
        int ret = 0, threshold_code, i;
        unsigned long reference, temp;
        unsigned int status;

        if (!trips) {
                pr_err("%s: Cannot get trip points from of-thermal.c!\n",
                       __func__);
                ret = -ENODEV;
                goto out;
        }

        status = readb(data->base + EXYNOS_TMU_REG_STATUS);
        if (!status) {
                ret = -EBUSY;
                goto out;
        }

        sanitize_temp_error(data, readl(data->base + EXYNOS_TMU_REG_TRIMINFO));

        /* Write temperature code for threshold */
        reference = trips[0].temperature / MCELSIUS;
        threshold_code = temp_to_code(data, reference);
        if (threshold_code < 0) {
                ret = threshold_code;
                goto out;
        }
        writeb(threshold_code, data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);

        for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
                temp = trips[i].temperature / MCELSIUS;
                writeb(temp - reference, data->base +
                       EXYNOS4210_TMU_REG_TRIG_LEVEL0 + i * 4);
        }

        data->tmu_clear_irqs(data);
out:
        return ret;
}

static int exynos4412_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        const struct thermal_trip * const trips =
                of_thermal_get_trip_points(data->tzd);
        unsigned int status, trim_info, con, ctrl, rising_threshold;
        int ret = 0, threshold_code, i;
        unsigned long crit_temp = 0;

        status = readb(data->base + EXYNOS_TMU_REG_STATUS);
        if (!status) {
                ret = -EBUSY;
                goto out;
        }

        if (data->soc == SOC_ARCH_EXYNOS3250 ||
            data->soc == SOC_ARCH_EXYNOS4412 ||
            data->soc == SOC_ARCH_EXYNOS5250) {
                if (data->soc == SOC_ARCH_EXYNOS3250) {
                        ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
                        ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
                        writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
                }
                ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
                ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
                writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
        }

        /* On exynos5420 the triminfo register is in the shared space */
        if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
                trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO);
        else
                trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);

        sanitize_temp_error(data, trim_info);

        /* Write temperature code for rising and falling threshold */
        rising_threshold = readl(data->base + EXYNOS_THD_TEMP_RISE);
        rising_threshold = get_th_reg(data, rising_threshold, false);
        writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
        writel(get_th_reg(data, 0, true), data->base + EXYNOS_THD_TEMP_FALL);

        data->tmu_clear_irqs(data);

        /* if last threshold limit is also present */
        for (i = 0; i < of_thermal_get_ntrips(data->tzd); i++) {
                if (trips[i].type == THERMAL_TRIP_CRITICAL) {
                        crit_temp = trips[i].temperature;
                        break;
                }
        }

        if (i == of_thermal_get_ntrips(data->tzd)) {
                pr_err("%s: No CRITICAL trip point defined at of-thermal.c!\n",
                       __func__);
                ret = -EINVAL;
                goto out;
        }

        threshold_code = temp_to_code(data, crit_temp / MCELSIUS);
        /* 1-4 level to be assigned in th0 reg */
        rising_threshold &= ~(0xff << 8 * i);
        rising_threshold |= threshold_code << 8 * i;
        writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
        con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
        con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
        writel(con, data->base + EXYNOS_TMU_REG_CONTROL);

out:
        return ret;
}

static int exynos5433_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct exynos_tmu_platform_data *pdata = data->pdata;
        struct thermal_zone_device *tz = data->tzd;
        unsigned int status, trim_info;
        unsigned int rising_threshold = 0, falling_threshold = 0;
        int temp, temp_hist;
        int ret = 0, threshold_code, i, sensor_id, cal_type;

        status = readb(data->base + EXYNOS_TMU_REG_STATUS);
        if (!status) {
                ret = -EBUSY;
                goto out;
        }

        trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
        sanitize_temp_error(data, trim_info);

        /* Read the temperature sensor id */
        sensor_id = (trim_info & EXYNOS5433_TRIMINFO_SENSOR_ID_MASK)
                                >> EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT;
        dev_info(&pdev->dev, "Temperature sensor ID: 0x%x\n", sensor_id);

        /* Read the calibration mode */
        writel(trim_info, data->base + EXYNOS_TMU_REG_TRIMINFO);
        cal_type = (trim_info & EXYNOS5433_TRIMINFO_CALIB_SEL_MASK)
                                >> EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT;

        switch (cal_type) {
        case EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING:
                pdata->cal_type = TYPE_ONE_POINT_TRIMMING;
                break;
        case EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING:
                pdata->cal_type = TYPE_TWO_POINT_TRIMMING;
                break;
        default:
                pdata->cal_type = TYPE_ONE_POINT_TRIMMING;
                break;
        };

        dev_info(&pdev->dev, "Calibration type is %d-point calibration\n",
                        cal_type ?  2 : 1);

        /* Write temperature code for rising and falling threshold */
        for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
                int rising_reg_offset, falling_reg_offset;
                int j = 0;

                switch (i) {
                case 0:
                case 1:
                case 2:
                case 3:
                        rising_reg_offset = EXYNOS5433_THD_TEMP_RISE3_0;
                        falling_reg_offset = EXYNOS5433_THD_TEMP_FALL3_0;
                        j = i;
                        break;
                case 4:
                case 5:
                case 6:
                case 7:
                        rising_reg_offset = EXYNOS5433_THD_TEMP_RISE7_4;
                        falling_reg_offset = EXYNOS5433_THD_TEMP_FALL7_4;
                        j = i - 4;
                        break;
                default:
                        continue;
                }

                /* Write temperature code for rising threshold */
                tz->ops->get_trip_temp(tz, i, &temp);
                temp /= MCELSIUS;
                threshold_code = temp_to_code(data, temp);

                rising_threshold = readl(data->base + rising_reg_offset);
                rising_threshold |= (threshold_code << j * 8);
                writel(rising_threshold, data->base + rising_reg_offset);

                /* Write temperature code for falling threshold */
                tz->ops->get_trip_hyst(tz, i, &temp_hist);
                temp_hist = temp - (temp_hist / MCELSIUS);
                threshold_code = temp_to_code(data, temp_hist);

                falling_threshold = readl(data->base + falling_reg_offset);
                falling_threshold &= ~(0xff << j * 8);
                falling_threshold |= (threshold_code << j * 8);
                writel(falling_threshold, data->base + falling_reg_offset);
        }

        data->tmu_clear_irqs(data);
out:
        return ret;
}

static int exynos5440_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        unsigned int trim_info = 0, con, rising_threshold;
        int ret = 0, threshold_code;
        int crit_temp = 0;

        /*
         * For exynos5440 soc triminfo value is swapped between TMU0 and
         * TMU2, so the below logic is needed.
         */
        switch (data->id) {
        case 0:
                trim_info = readl(data->base + EXYNOS5440_EFUSE_SWAP_OFFSET +
                                 EXYNOS5440_TMU_S0_7_TRIM);
                break;
        case 1:
                trim_info = readl(data->base + EXYNOS5440_TMU_S0_7_TRIM);
                break;
        case 2:
                trim_info = readl(data->base - EXYNOS5440_EFUSE_SWAP_OFFSET +
                                  EXYNOS5440_TMU_S0_7_TRIM);
        }
        sanitize_temp_error(data, trim_info);

        /* Write temperature code for rising and falling threshold */
        rising_threshold = readl(data->base + EXYNOS5440_TMU_S0_7_TH0);
        rising_threshold = get_th_reg(data, rising_threshold, false);
        writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH0);
        writel(0, data->base + EXYNOS5440_TMU_S0_7_TH1);

        data->tmu_clear_irqs(data);

        /* if last threshold limit is also present */
        if (!data->tzd->ops->get_crit_temp(data->tzd, &crit_temp)) {
                threshold_code = temp_to_code(data, crit_temp / MCELSIUS);
                /* 5th level to be assigned in th2 reg */
                rising_threshold =
                        threshold_code << EXYNOS5440_TMU_TH_RISE4_SHIFT;
                writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH2);
                con = readl(data->base + EXYNOS5440_TMU_S0_7_CTRL);
                con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
                writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
        }
        /* Clear the PMIN in the common TMU register */
        if (!data->id)
                writel(0, data->base_second + EXYNOS5440_TMU_PMIN);
        return ret;
}

static int exynos7_tmu_initialize(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        struct exynos_tmu_platform_data *pdata = data->pdata;
        unsigned int status, trim_info;
        unsigned int rising_threshold = 0, falling_threshold = 0;
        int ret = 0, threshold_code, i;
        int temp, temp_hist;
        unsigned int reg_off, bit_off;

        status = readb(data->base + EXYNOS_TMU_REG_STATUS);
        if (!status) {
                ret = -EBUSY;
                goto out;
        }

        trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);

        data->temp_error1 = trim_info & EXYNOS7_TMU_TEMP_MASK;
        if (!data->temp_error1 ||
            (pdata->min_efuse_value > data->temp_error1) ||
            (data->temp_error1 > pdata->max_efuse_value))
                data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;

        /* Write temperature code for rising and falling threshold */
        for (i = (of_thermal_get_ntrips(tz) - 1); i >= 0; i--) {
                /*
                 * On exynos7 there are 4 rising and 4 falling threshold
                 * registers (0x50-0x5c and 0x60-0x6c respectively). Each
                 * register holds the value of two threshold levels (at bit
                 * offsets 0 and 16). Based on the fact that there are atmost
                 * eight possible trigger levels, calculate the register and
                 * bit offsets where the threshold levels are to be written.
                 *
                 * e.g. EXYNOS7_THD_TEMP_RISE7_6 (0x50)
                 * [24:16] - Threshold level 7
                 * [8:0] - Threshold level 6
                 * e.g. EXYNOS7_THD_TEMP_RISE5_4 (0x54)
                 * [24:16] - Threshold level 5
                 * [8:0] - Threshold level 4
                 *
                 * and similarly for falling thresholds.
                 *
                 * Based on the above, calculate the register and bit offsets
                 * for rising/falling threshold levels and populate them.
                 */
                reg_off = ((7 - i) / 2) * 4;
                bit_off = ((8 - i) % 2);

                tz->ops->get_trip_temp(tz, i, &temp);
                temp /= MCELSIUS;

                tz->ops->get_trip_hyst(tz, i, &temp_hist);
                temp_hist = temp - (temp_hist / MCELSIUS);

                /* Set 9-bit temperature code for rising threshold levels */
                threshold_code = temp_to_code(data, temp);
                rising_threshold = readl(data->base +
                        EXYNOS7_THD_TEMP_RISE7_6 + reg_off);
                rising_threshold &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
                rising_threshold |= threshold_code << (16 * bit_off);
                writel(rising_threshold,
                       data->base + EXYNOS7_THD_TEMP_RISE7_6 + reg_off);

                /* Set 9-bit temperature code for falling threshold levels */
                threshold_code = temp_to_code(data, temp_hist);
                falling_threshold &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
                falling_threshold |= threshold_code << (16 * bit_off);
                writel(falling_threshold,
                       data->base + EXYNOS7_THD_TEMP_FALL7_6 + reg_off);
        }

        data->tmu_clear_irqs(data);
out:
        return ret;
}

static void exynos4210_tmu_control(struct platform_device *pdev, bool on)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        unsigned int con, interrupt_en;

        con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));

        if (on) {
                con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en =
                        (of_thermal_is_trip_valid(tz, 3)
                         << EXYNOS_TMU_INTEN_RISE3_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 2)
                         << EXYNOS_TMU_INTEN_RISE2_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 1)
                         << EXYNOS_TMU_INTEN_RISE1_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 0)
                         << EXYNOS_TMU_INTEN_RISE0_SHIFT);

                if (data->soc != SOC_ARCH_EXYNOS4210)
                        interrupt_en |=
                                interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
        } else {
                con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en = 0; /* Disable all interrupts */
        }
        writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
        writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}

static void exynos5433_tmu_control(struct platform_device *pdev, bool on)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        unsigned int con, interrupt_en, pd_det_en;

        con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));

        if (on) {
                con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en =
                        (of_thermal_is_trip_valid(tz, 7)
                        << EXYNOS7_TMU_INTEN_RISE7_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 6)
                        << EXYNOS7_TMU_INTEN_RISE6_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 5)
                        << EXYNOS7_TMU_INTEN_RISE5_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 4)
                        << EXYNOS7_TMU_INTEN_RISE4_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 3)
                        << EXYNOS7_TMU_INTEN_RISE3_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 2)
                        << EXYNOS7_TMU_INTEN_RISE2_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 1)
                        << EXYNOS7_TMU_INTEN_RISE1_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 0)
                        << EXYNOS7_TMU_INTEN_RISE0_SHIFT);

                interrupt_en |=
                        interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
        } else {
                con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en = 0; /* Disable all interrupts */
        }

        pd_det_en = on ? EXYNOS5433_PD_DET_EN : 0;

        writel(pd_det_en, data->base + EXYNOS5433_TMU_PD_DET_EN);
        writel(interrupt_en, data->base + EXYNOS5433_TMU_REG_INTEN);
        writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}

static void exynos5440_tmu_control(struct platform_device *pdev, bool on)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        unsigned int con, interrupt_en;

        con = get_con_reg(data, readl(data->base + EXYNOS5440_TMU_S0_7_CTRL));

        if (on) {
                con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en =
                        (of_thermal_is_trip_valid(tz, 3)
                         << EXYNOS5440_TMU_INTEN_RISE3_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 2)
                         << EXYNOS5440_TMU_INTEN_RISE2_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 1)
                         << EXYNOS5440_TMU_INTEN_RISE1_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 0)
                         << EXYNOS5440_TMU_INTEN_RISE0_SHIFT);
                interrupt_en |=
                        interrupt_en << EXYNOS5440_TMU_INTEN_FALL0_SHIFT;
        } else {
                con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
                interrupt_en = 0; /* Disable all interrupts */
        }
        writel(interrupt_en, data->base + EXYNOS5440_TMU_S0_7_IRQEN);
        writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
}

static void exynos7_tmu_control(struct platform_device *pdev, bool on)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tz = data->tzd;
        unsigned int con, interrupt_en;

        con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));

        if (on) {
                con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
                con |= (1 << EXYNOS7_PD_DET_EN_SHIFT);
                interrupt_en =
                        (of_thermal_is_trip_valid(tz, 7)
                        << EXYNOS7_TMU_INTEN_RISE7_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 6)
                        << EXYNOS7_TMU_INTEN_RISE6_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 5)
                        << EXYNOS7_TMU_INTEN_RISE5_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 4)
                        << EXYNOS7_TMU_INTEN_RISE4_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 3)
                        << EXYNOS7_TMU_INTEN_RISE3_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 2)
                        << EXYNOS7_TMU_INTEN_RISE2_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 1)
                        << EXYNOS7_TMU_INTEN_RISE1_SHIFT) |
                        (of_thermal_is_trip_valid(tz, 0)
                        << EXYNOS7_TMU_INTEN_RISE0_SHIFT);

                interrupt_en |=
                        interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
        } else {
                con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
                con &= ~(1 << EXYNOS7_PD_DET_EN_SHIFT);
                interrupt_en = 0; /* Disable all interrupts */
        }

        writel(interrupt_en, data->base + EXYNOS7_TMU_REG_INTEN);
        writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}

static int exynos_get_temp(void *p, int *temp)
{
        struct exynos_tmu_data *data = p;

        if (!data || !data->tmu_read)
                return -EINVAL;

        mutex_lock(&data->lock);
        clk_enable(data->clk);

        *temp = code_to_temp(data, data->tmu_read(data)) * MCELSIUS;

        clk_disable(data->clk);
        mutex_unlock(&data->lock);

        return 0;
}

#ifdef CONFIG_THERMAL_EMULATION
static u32 get_emul_con_reg(struct exynos_tmu_data *data, unsigned int val,
                            int temp)
{
        if (temp) {
                temp /= MCELSIUS;

                if (data->soc != SOC_ARCH_EXYNOS5440) {
                        val &= ~(EXYNOS_EMUL_TIME_MASK << EXYNOS_EMUL_TIME_SHIFT);
                        val |= (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT);
                }
                if (data->soc == SOC_ARCH_EXYNOS7) {
                        val &= ~(EXYNOS7_EMUL_DATA_MASK <<
                                EXYNOS7_EMUL_DATA_SHIFT);
                        val |= (temp_to_code(data, temp) <<
                                EXYNOS7_EMUL_DATA_SHIFT) |
                                EXYNOS_EMUL_ENABLE;
                } else {
                        val &= ~(EXYNOS_EMUL_DATA_MASK <<
                                EXYNOS_EMUL_DATA_SHIFT);
                        val |= (temp_to_code(data, temp) <<
                                EXYNOS_EMUL_DATA_SHIFT) |
                                EXYNOS_EMUL_ENABLE;
                }
        } else {
                val &= ~EXYNOS_EMUL_ENABLE;
        }

        return val;
}

static void exynos4412_tmu_set_emulation(struct exynos_tmu_data *data,
                                         int temp)
{
        unsigned int val;
        u32 emul_con;

        if (data->soc == SOC_ARCH_EXYNOS5260)
                emul_con = EXYNOS5260_EMUL_CON;
        else if (data->soc == SOC_ARCH_EXYNOS5433)
                emul_con = EXYNOS5433_TMU_EMUL_CON;
        else if (data->soc == SOC_ARCH_EXYNOS7)
                emul_con = EXYNOS7_TMU_REG_EMUL_CON;
        else
                emul_con = EXYNOS_EMUL_CON;

        val = readl(data->base + emul_con);
        val = get_emul_con_reg(data, val, temp);
        writel(val, data->base + emul_con);
}

static void exynos5440_tmu_set_emulation(struct exynos_tmu_data *data,
                                         int temp)
{
        unsigned int val;

        val = readl(data->base + EXYNOS5440_TMU_S0_7_DEBUG);
        val = get_emul_con_reg(data, val, temp);
        writel(val, data->base + EXYNOS5440_TMU_S0_7_DEBUG);
}

static int exynos_tmu_set_emulation(void *drv_data, int temp)
{
        struct exynos_tmu_data *data = drv_data;
        int ret = -EINVAL;

        if (data->soc == SOC_ARCH_EXYNOS4210)
                goto out;

        if (temp && temp < MCELSIUS)
                goto out;

        mutex_lock(&data->lock);
        clk_enable(data->clk);
        data->tmu_set_emulation(data, temp);
        clk_disable(data->clk);
        mutex_unlock(&data->lock);
        return 0;
out:
        return ret;
}
#else
#define exynos4412_tmu_set_emulation NULL
#define exynos5440_tmu_set_emulation NULL
static int exynos_tmu_set_emulation(void *drv_data, int temp)
        { return -EINVAL; }
#endif /* CONFIG_THERMAL_EMULATION */

static int exynos4210_tmu_read(struct exynos_tmu_data *data)
{
        int ret = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);

        /* "temp_code" should range between 75 and 175 */
        return (ret < 75 || ret > 175) ? -ENODATA : ret;
}

static int exynos4412_tmu_read(struct exynos_tmu_data *data)
{
        return readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
}

static int exynos5440_tmu_read(struct exynos_tmu_data *data)
{
        return readb(data->base + EXYNOS5440_TMU_S0_7_TEMP);
}

static int exynos7_tmu_read(struct exynos_tmu_data *data)
{
        return readw(data->base + EXYNOS_TMU_REG_CURRENT_TEMP) &
                EXYNOS7_TMU_TEMP_MASK;
}

static void exynos_tmu_work(struct work_struct *work)
{
        struct exynos_tmu_data *data = container_of(work,
                        struct exynos_tmu_data, irq_work);
        unsigned int val_type;

        if (!IS_ERR(data->clk_sec))
                clk_enable(data->clk_sec);
        /* Find which sensor generated this interrupt */
        if (data->soc == SOC_ARCH_EXYNOS5440) {
                val_type = readl(data->base_second + EXYNOS5440_TMU_IRQ_STATUS);
                if (!((val_type >> data->id) & 0x1))
                        goto out;
        }
        if (!IS_ERR(data->clk_sec))
                clk_disable(data->clk_sec);

        exynos_report_trigger(data);
        mutex_lock(&data->lock);
        clk_enable(data->clk);

        /* TODO: take action based on particular interrupt */
        data->tmu_clear_irqs(data);

        clk_disable(data->clk);
        mutex_unlock(&data->lock);
out:
        enable_irq(data->irq);
}

static void exynos4210_tmu_clear_irqs(struct exynos_tmu_data *data)
{
        unsigned int val_irq;
        u32 tmu_intstat, tmu_intclear;

        if (data->soc == SOC_ARCH_EXYNOS5260) {
                tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT;
                tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR;
        } else if (data->soc == SOC_ARCH_EXYNOS7) {
                tmu_intstat = EXYNOS7_TMU_REG_INTPEND;
                tmu_intclear = EXYNOS7_TMU_REG_INTPEND;
        } else if (data->soc == SOC_ARCH_EXYNOS5433) {
                tmu_intstat = EXYNOS5433_TMU_REG_INTPEND;
                tmu_intclear = EXYNOS5433_TMU_REG_INTPEND;
        } else {
                tmu_intstat = EXYNOS_TMU_REG_INTSTAT;
                tmu_intclear = EXYNOS_TMU_REG_INTCLEAR;
        }

        val_irq = readl(data->base + tmu_intstat);
        /*
         * Clear the interrupts.  Please note that the documentation for
         * Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
         * states that INTCLEAR register has a different placing of bits
         * responsible for FALL IRQs than INTSTAT register.  Exynos5420
         * and Exynos5440 documentation is correct (Exynos4210 doesn't
         * support FALL IRQs at all).
         */
        writel(val_irq, data->base + tmu_intclear);
}

static void exynos5440_tmu_clear_irqs(struct exynos_tmu_data *data)
{
        unsigned int val_irq;

        val_irq = readl(data->base + EXYNOS5440_TMU_S0_7_IRQ);
        /* clear the interrupts */
        writel(val_irq, data->base + EXYNOS5440_TMU_S0_7_IRQ);
}

static irqreturn_t exynos_tmu_irq(int irq, void *id)
{
        struct exynos_tmu_data *data = id;

        disable_irq_nosync(irq);
        schedule_work(&data->irq_work);

        return IRQ_HANDLED;
}

static const struct of_device_id exynos_tmu_match[] = {
        { .compatible = "samsung,exynos3250-tmu", },
        { .compatible = "samsung,exynos4210-tmu", },
        { .compatible = "samsung,exynos4412-tmu", },
        { .compatible = "samsung,exynos5250-tmu", },
        { .compatible = "samsung,exynos5260-tmu", },
        { .compatible = "samsung,exynos5420-tmu", },
        { .compatible = "samsung,exynos5420-tmu-ext-triminfo", },
        { .compatible = "samsung,exynos5433-tmu", },
        { .compatible = "samsung,exynos5440-tmu", },
        { .compatible = "samsung,exynos7-tmu", },
        { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, exynos_tmu_match);

static int exynos_of_get_soc_type(struct device_node *np)
{
        if (of_device_is_compatible(np, "samsung,exynos3250-tmu"))
                return SOC_ARCH_EXYNOS3250;
        else if (of_device_is_compatible(np, "samsung,exynos4210-tmu"))
                return SOC_ARCH_EXYNOS4210;
        else if (of_device_is_compatible(np, "samsung,exynos4412-tmu"))
                return SOC_ARCH_EXYNOS4412;
        else if (of_device_is_compatible(np, "samsung,exynos5250-tmu"))
                return SOC_ARCH_EXYNOS5250;
        else if (of_device_is_compatible(np, "samsung,exynos5260-tmu"))
                return SOC_ARCH_EXYNOS5260;
        else if (of_device_is_compatible(np, "samsung,exynos5420-tmu"))
                return SOC_ARCH_EXYNOS5420;
        else if (of_device_is_compatible(np,
                                         "samsung,exynos5420-tmu-ext-triminfo"))
                return SOC_ARCH_EXYNOS5420_TRIMINFO;
        else if (of_device_is_compatible(np, "samsung,exynos5433-tmu"))
                return SOC_ARCH_EXYNOS5433;
        else if (of_device_is_compatible(np, "samsung,exynos5440-tmu"))
                return SOC_ARCH_EXYNOS5440;
        else if (of_device_is_compatible(np, "samsung,exynos7-tmu"))
                return SOC_ARCH_EXYNOS7;

        return -EINVAL;
}

static int exynos_of_sensor_conf(struct device_node *np,
                                 struct exynos_tmu_platform_data *pdata)
{
        u32 value;
        int ret;

        of_node_get(np);

        ret = of_property_read_u32(np, "samsung,tmu_gain", &value);
        pdata->gain = (u8)value;
        of_property_read_u32(np, "samsung,tmu_reference_voltage", &value);
        pdata->reference_voltage = (u8)value;
        of_property_read_u32(np, "samsung,tmu_noise_cancel_mode", &value);
        pdata->noise_cancel_mode = (u8)value;

        of_property_read_u32(np, "samsung,tmu_efuse_value",
                             &pdata->efuse_value);
        of_property_read_u32(np, "samsung,tmu_min_efuse_value",
                             &pdata->min_efuse_value);
        of_property_read_u32(np, "samsung,tmu_max_efuse_value",
                             &pdata->max_efuse_value);

        of_property_read_u32(np, "samsung,tmu_first_point_trim", &value);
        pdata->first_point_trim = (u8)value;
        of_property_read_u32(np, "samsung,tmu_second_point_trim", &value);
        pdata->second_point_trim = (u8)value;
        of_property_read_u32(np, "samsung,tmu_default_temp_offset", &value);
        pdata->default_temp_offset = (u8)value;

        of_property_read_u32(np, "samsung,tmu_cal_type", &pdata->cal_type);
        of_property_read_u32(np, "samsung,tmu_cal_mode", &pdata->cal_mode);

        of_node_put(np);
        return 0;
}

static int exynos_map_dt_data(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct exynos_tmu_platform_data *pdata;
        struct resource res;
        int ret;

        if (!data || !pdev->dev.of_node)
                return -ENODEV;

        /*
         * Try enabling the regulator if found
         * TODO: Add regulator as an SOC feature, so that regulator enable
         * is a compulsory call.
         */
        data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
        if (!IS_ERR(data->regulator)) {
                ret = regulator_enable(data->regulator);
                if (ret) {
                        dev_err(&pdev->dev, "failed to enable vtmu\n");
                        return ret;
                }
        } else {
                dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
        }

        data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
        if (data->id < 0)
                data->id = 0;

        data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
        if (data->irq <= 0) {
                dev_err(&pdev->dev, "failed to get IRQ\n");
                return -ENODEV;
        }

        if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
                dev_err(&pdev->dev, "failed to get Resource 0\n");
                return -ENODEV;
        }

        data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
        if (!data->base) {
                dev_err(&pdev->dev, "Failed to ioremap memory\n");
                return -EADDRNOTAVAIL;
        }

        pdata = devm_kzalloc(&pdev->dev,
                             sizeof(struct exynos_tmu_platform_data),
                             GFP_KERNEL);
        if (!pdata)
                return -ENOMEM;

        exynos_of_sensor_conf(pdev->dev.of_node, pdata);
        data->pdata = pdata;
        data->soc = exynos_of_get_soc_type(pdev->dev.of_node);

        switch (data->soc) {
        case SOC_ARCH_EXYNOS4210:
                data->tmu_initialize = exynos4210_tmu_initialize;
                data->tmu_control = exynos4210_tmu_control;
                data->tmu_read = exynos4210_tmu_read;
                data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
                break;
        case SOC_ARCH_EXYNOS3250:
        case SOC_ARCH_EXYNOS4412:
        case SOC_ARCH_EXYNOS5250:
        case SOC_ARCH_EXYNOS5260:
        case SOC_ARCH_EXYNOS5420:
        case SOC_ARCH_EXYNOS5420_TRIMINFO:
                data->tmu_initialize = exynos4412_tmu_initialize;
                data->tmu_control = exynos4210_tmu_control;
                data->tmu_read = exynos4412_tmu_read;
                data->tmu_set_emulation = exynos4412_tmu_set_emulation;
                data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
                break;
        case SOC_ARCH_EXYNOS5433:
                data->tmu_initialize = exynos5433_tmu_initialize;
                data->tmu_control = exynos5433_tmu_control;
                data->tmu_read = exynos4412_tmu_read;
                data->tmu_set_emulation = exynos4412_tmu_set_emulation;
                data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
                break;
        case SOC_ARCH_EXYNOS5440:
                data->tmu_initialize = exynos5440_tmu_initialize;
                data->tmu_control = exynos5440_tmu_control;
                data->tmu_read = exynos5440_tmu_read;
                data->tmu_set_emulation = exynos5440_tmu_set_emulation;
                data->tmu_clear_irqs = exynos5440_tmu_clear_irqs;
                break;
        case SOC_ARCH_EXYNOS7:
                data->tmu_initialize = exynos7_tmu_initialize;
                data->tmu_control = exynos7_tmu_control;
                data->tmu_read = exynos7_tmu_read;
                data->tmu_set_emulation = exynos4412_tmu_set_emulation;
                data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
                break;
        default:
                dev_err(&pdev->dev, "Platform not supported\n");
                return -EINVAL;
        }

        /*
         * Check if the TMU shares some registers and then try to map the
         * memory of common registers.
         */
        if (data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO &&
            data->soc != SOC_ARCH_EXYNOS5440)
                return 0;

        if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
                dev_err(&pdev->dev, "failed to get Resource 1\n");
                return -ENODEV;
        }

        data->base_second = devm_ioremap(&pdev->dev, res.start,
                                        resource_size(&res));
        if (!data->base_second) {
                dev_err(&pdev->dev, "Failed to ioremap memory\n");
                return -ENOMEM;
        }

        return 0;
}

static struct thermal_zone_of_device_ops exynos_sensor_ops = {
        .get_temp = exynos_get_temp,
        .set_emul_temp = exynos_tmu_set_emulation,
};

static int exynos_tmu_probe(struct platform_device *pdev)
{
        struct exynos_tmu_data *data;
        int ret;

        data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
                                        GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        platform_set_drvdata(pdev, data);
        mutex_init(&data->lock);

        data->tzd = thermal_zone_of_sensor_register(&pdev->dev, 0, data,
                                                    &exynos_sensor_ops);
        if (IS_ERR(data->tzd)) {
                pr_err("thermal: tz: %p ERROR\n", data->tzd);
                return PTR_ERR(data->tzd);
        }
        ret = exynos_map_dt_data(pdev);
        if (ret)
                goto err_sensor;

        INIT_WORK(&data->irq_work, exynos_tmu_work);

        data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
        if (IS_ERR(data->clk)) {
                dev_err(&pdev->dev, "Failed to get clock\n");
                ret = PTR_ERR(data->clk);
                goto err_sensor;
        }

        data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
        if (IS_ERR(data->clk_sec)) {
                if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
                        dev_err(&pdev->dev, "Failed to get triminfo clock\n");
                        ret = PTR_ERR(data->clk_sec);
                        goto err_sensor;
                }
        } else {
                ret = clk_prepare(data->clk_sec);
                if (ret) {
                        dev_err(&pdev->dev, "Failed to get clock\n");
                        goto err_sensor;
                }
        }

        ret = clk_prepare(data->clk);
        if (ret) {
                dev_err(&pdev->dev, "Failed to get clock\n");
                goto err_clk_sec;
        }

        switch (data->soc) {
        case SOC_ARCH_EXYNOS5433:
        case SOC_ARCH_EXYNOS7:
                data->sclk = devm_clk_get(&pdev->dev, "tmu_sclk");
                if (IS_ERR(data->sclk)) {
                        dev_err(&pdev->dev, "Failed to get sclk\n");
                        goto err_clk;
                } else {
                        ret = clk_prepare_enable(data->sclk);
                        if (ret) {
                                dev_err(&pdev->dev, "Failed to enable sclk\n");
                                goto err_clk;
                        }
                }
                break;
        default:
                break;
        };

        ret = exynos_tmu_initialize(pdev);
        if (ret) {
                dev_err(&pdev->dev, "Failed to initialize TMU\n");
                goto err_sclk;
        }

        ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
                IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
        if (ret) {
                dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
                goto err_sclk;
        }

        exynos_tmu_control(pdev, true);
        return 0;
err_sclk:
        clk_disable_unprepare(data->sclk);
err_clk:
        clk_unprepare(data->clk);
err_clk_sec:
        if (!IS_ERR(data->clk_sec))
                clk_unprepare(data->clk_sec);
err_sensor:
        if (!IS_ERR_OR_NULL(data->regulator))
                regulator_disable(data->regulator);
        thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);

        return ret;
}

static int exynos_tmu_remove(struct platform_device *pdev)
{
        struct exynos_tmu_data *data = platform_get_drvdata(pdev);
        struct thermal_zone_device *tzd = data->tzd;

        thermal_zone_of_sensor_unregister(&pdev->dev, tzd);
        exynos_tmu_control(pdev, false);

        clk_disable_unprepare(data->sclk);
        clk_unprepare(data->clk);
        if (!IS_ERR(data->clk_sec))
                clk_unprepare(data->clk_sec);

        if (!IS_ERR(data->regulator))
                regulator_disable(data->regulator);

        return 0;
}

#ifdef CONFIG_PM_SLEEP
static int exynos_tmu_suspend(struct device *dev)
{
        exynos_tmu_control(to_platform_device(dev), false);

        return 0;
}

static int exynos_tmu_resume(struct device *dev)
{
        struct platform_device *pdev = to_platform_device(dev);

        exynos_tmu_initialize(pdev);
        exynos_tmu_control(pdev, true);

        return 0;
}

static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
                         exynos_tmu_suspend, exynos_tmu_resume);
#define EXYNOS_TMU_PM   (&exynos_tmu_pm)
#else
#define EXYNOS_TMU_PM   NULL
#endif

static struct platform_driver exynos_tmu_driver = {
        .driver = {
                .name   = "exynos-tmu",
                .pm     = EXYNOS_TMU_PM,
                .of_match_table = exynos_tmu_match,
        },
        .probe = exynos_tmu_probe,
        .remove = exynos_tmu_remove,
};

module_platform_driver(exynos_tmu_driver);

MODULE_DESCRIPTION("EXYNOS TMU Driver");
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:exynos-tmu");