Re: [PATCH v5 15/18] thermal: samsung: core: Exynos TMU rework to use device tree for configuration

Lukasz Majewski
2015-01-21T08:48:08Z

Hi Eduardo,

> On Mon, Jan 19, 2015 at 12:20:59PM +0100, Lukasz Majewski wrote:
> > This patch brings support for providing configuration via device
> > tree. Previously this data has been hardcoded in the
> > exynos_tmu_data.c file. Such approach was not scalable and very
> > often required copying the whole data.
> >
> > Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
> > ---
> > Changes for v2:
> > - Adjust exynos_tmu.c code to the newest ti-soc-thermal repository
> > - Usage of of-thermal.c exported trip points table
> > Changes for v3:
> > - Adding exynos_of_get_soc_type() method to set SOC type from
> > device's compatible string
> > - "samsung,tmu_" prefix for TMU specific properties has been added
> > Changes for v4:
> > - None
> > Changes for v5:
> > - Remove duplicated exynos_tmu_initialize() - reported by Abhilash
> > Kesavan <a.kesavan@samsung.com>
> >
> > ---
> > drivers/thermal/samsung/Makefile | 2 -
> > drivers/thermal/samsung/exynos_tmu.c | 339
> > ++++++++++++++++++++++-------------
> > drivers/thermal/samsung/exynos_tmu.h | 53 +----- 3 files changed,
> > 220 insertions(+), 174 deletions(-)
> >
> > diff --git a/drivers/thermal/samsung/Makefile
> > b/drivers/thermal/samsung/Makefile index c09d830..1e47d0d 100644
> > --- a/drivers/thermal/samsung/Makefile
> > +++ b/drivers/thermal/samsung/Makefile
> > @@ -3,5 +3,3 @@
> > #
> > obj-$(CONFIG_EXYNOS_THERMAL) +=
> > exynos_thermal.o exynos_thermal-y :=
> > exynos_tmu.o -exynos_thermal-y +=
> > exynos_tmu_data.o
> > -exynos_thermal-$(CONFIG_EXYNOS_THERMAL_CORE) +=
> > exynos_thermal_common.o diff --git
> > a/drivers/thermal/samsung/exynos_tmu.c
> > b/drivers/thermal/samsung/exynos_tmu.c index ae30f6a..9d2d685
> > 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++
> > b/drivers/thermal/samsung/exynos_tmu.c @@ -1,6 +1,10 @@ /*
> > * 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>
> > @@ -31,8 +35,8 @@
> > #include <linux/platform_device.h>
> > #include <linux/regulator/consumer.h>
> >
> > -#include "exynos_thermal_common.h"
> > #include "exynos_tmu.h"
> > +#include "../thermal_core.h"
> >
> > /* Exynos generic registers */
> > #define EXYNOS_TMU_REG_TRIMINFO 0x0
> > @@ -115,6 +119,7 @@
> > #define EXYNOS5440_TMU_TH_RISE4_SHIFT 24
> > #define EXYNOS5440_EFUSE_SWAP_OFFSET 8
> >
> > +#define MCELSIUS 1000
> > /**
> > * struct exynos_tmu_data : A structure to hold the private data
> > of the TMU driver
> > @@ -150,7 +155,8 @@ struct exynos_tmu_data {
> > struct clk *clk, *clk_sec;
> > u8 temp_error1, temp_error2;
> > struct regulator *regulator;
> > - struct thermal_sensor_conf *reg_conf;
> > + 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);
> > @@ -159,6 +165,33 @@ struct exynos_tmu_data {
> > 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;
> > + unsigned long temp;
> > + unsigned int i;
> > +
> > + if (!p) {
> > + pr_err("Wrong temperature configuration data\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. @@ -234,14 +267,25 @@ static void
> > sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
> > static u32 get_th_reg(struct exynos_tmu_data *data, u32 threshold,
> > bool falling) {
> > - struct exynos_tmu_platform_data *pdata = data->pdata;
> > + struct thermal_zone_device *tz = data->tzd;
> > + const struct thermal_trip * const trips =
> > + of_thermal_get_trip_points(tz);
> > + unsigned long temp;
> > int i;
> >
> > - for (i = 0; i < pdata->non_hw_trigger_levels; i++) {
> > - u8 temp = pdata->trigger_levels[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 -= pdata->threshold_falling;
> > + temp -= (trips[i].hysteresis / MCELSIUS);
> > else
> > threshold &= ~(0xff << 8 * i);
> >
> > @@ -305,9 +349,19 @@ static void exynos_tmu_control(struct
> > platform_device *pdev, bool on) static int
> > exynos4210_tmu_initialize(struct platform_device *pdev) {
> > struct exynos_tmu_data *data = platform_get_drvdata(pdev);
> > - struct exynos_tmu_platform_data *pdata = data->pdata;
> > - unsigned int status;
> > + 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) {
> > @@ -318,12 +372,19 @@ static int exynos4210_tmu_initialize(struct
> > platform_device *pdev) sanitize_temp_error(data, readl(data->base +
> > EXYNOS_TMU_REG_TRIMINFO));
> > /* Write temperature code for threshold */
> > - threshold_code = temp_to_code(data, pdata->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 < pdata->non_hw_trigger_levels; i++)
> > - writeb(pdata->trigger_levels[i], data->base +
> > + 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:
> > @@ -333,9 +394,11 @@ out:
> > static int exynos4412_tmu_initialize(struct platform_device *pdev)
> > {
> > struct exynos_tmu_data *data = platform_get_drvdata(pdev);
> > - struct exynos_tmu_platform_data *pdata = data->pdata;
> > + 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) {
> > @@ -373,17 +436,29 @@ static int exynos4412_tmu_initialize(struct
> > platform_device *pdev) data->tmu_clear_irqs(data);
> >
> > /* if last threshold limit is also present */
> > - i = pdata->max_trigger_level - 1;
> > - if (pdata->trigger_levels[i] && pdata->trigger_type[i] ==
> > HW_TRIP) {
> > - threshold_code = temp_to_code(data,
> > pdata->trigger_levels[i]);
> > - /* 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);
> > + 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;
> > }
> > @@ -391,9 +466,9 @@ out:
> > static int exynos5440_tmu_initialize(struct platform_device *pdev)
> > {
> > struct exynos_tmu_data *data = platform_get_drvdata(pdev);
> > - struct exynos_tmu_platform_data *pdata = data->pdata;
> > unsigned int trim_info = 0, con, rising_threshold;
> > - int ret = 0, threshold_code, i;
> > + int ret = 0, threshold_code;
> > + unsigned long crit_temp = 0;
> >
> > /*
> > * For exynos5440 soc triminfo value is swapped between
> > TMU0 and @@ -422,9 +497,8 @@ static int
> > exynos5440_tmu_initialize(struct platform_device *pdev)
> > data->tmu_clear_irqs(data);
> > /* if last threshold limit is also present */
> > - i = pdata->max_trigger_level - 1;
> > - if (pdata->trigger_levels[i] && pdata->trigger_type[i] ==
> > HW_TRIP) {
> > - threshold_code = temp_to_code(data,
> > pdata->trigger_levels[i]);
> > + 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; @@ -442,7 +516,7 @@ static int
> > exynos5440_tmu_initialize(struct platform_device *pdev) static void
> > exynos4210_tmu_control(struct platform_device *pdev, bool on) {
> > 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 con, interrupt_en;
> >
> > con = get_con_reg(data, readl(data->base +
> > EXYNOS_TMU_REG_CONTROL)); @@ -450,10 +524,15 @@ static void
> > exynos4210_tmu_control(struct platform_device *pdev, bool on) if
> > (on) { con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
> > interrupt_en =
> > - pdata->trigger_enable[3] <<
> > EXYNOS_TMU_INTEN_RISE3_SHIFT |
> > - pdata->trigger_enable[2] <<
> > EXYNOS_TMU_INTEN_RISE2_SHIFT |
> > - pdata->trigger_enable[1] <<
> > EXYNOS_TMU_INTEN_RISE1_SHIFT |
> > - pdata->trigger_enable[0] <<
> > EXYNOS_TMU_INTEN_RISE0_SHIFT;
> > + (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; @@ -468,7 +547,7 @@ static void
> > exynos4210_tmu_control(struct platform_device *pdev, bool on)
> > static void exynos5440_tmu_control(struct platform_device *pdev,
> > bool on) { 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 con, interrupt_en;
> >
> > con = get_con_reg(data, readl(data->base +
> > EXYNOS5440_TMU_S0_7_CTRL)); @@ -476,11 +555,16 @@ static void
> > exynos5440_tmu_control(struct platform_device *pdev, bool on) if
> > (on) { con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
> > interrupt_en =
> > - pdata->trigger_enable[3] <<
> > EXYNOS5440_TMU_INTEN_RISE3_SHIFT |
> > - pdata->trigger_enable[2] <<
> > EXYNOS5440_TMU_INTEN_RISE2_SHIFT |
> > - pdata->trigger_enable[1] <<
> > EXYNOS5440_TMU_INTEN_RISE1_SHIFT |
> > - pdata->trigger_enable[0] <<
> > EXYNOS5440_TMU_INTEN_RISE0_SHIFT;
> > - interrupt_en |= interrupt_en <<
> > EXYNOS5440_TMU_INTEN_FALL0_SHIFT;
> > + (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 */
> > @@ -489,19 +573,22 @@ static void exynos5440_tmu_control(struct
> > platform_device *pdev, bool on) writel(con, data->base +
> > EXYNOS5440_TMU_S0_7_CTRL); }
> >
> > -static int exynos_tmu_read(struct exynos_tmu_data *data)
> > +int exynos_get_temp(void *p, long *temp)
>
> exynos_get_temp must be static.

Yes, this should be static.
Thanks.

>
> > {
> > - int ret;
> > + struct exynos_tmu_data *data = p;
> > +
> > + if (!data)
> > + return -EINVAL;
> >
> > mutex_lock(&data->lock);
> > clk_enable(data->clk);
> > - ret = data->tmu_read(data);
> > - if (ret >= 0)
> > - ret = code_to_temp(data, ret);
> > +
> > + *temp = code_to_temp(data, data->tmu_read(data)) *
> > MCELSIUS; +
> > clk_disable(data->clk);
> > mutex_unlock(&data->lock);
> >
> > - return ret;
> > + return 0;
> > }
> >
> > #ifdef CONFIG_THERMAL_EMULATION
> > @@ -613,7 +700,7 @@ static void exynos_tmu_work(struct work_struct
> > *work) if (!IS_ERR(data->clk_sec))
> > clk_disable(data->clk_sec);
> >
> > - exynos_report_trigger(data->reg_conf);
> > + exynos_report_trigger(data);
> > mutex_lock(&data->lock);
> > clk_enable(data->clk);
> >
> > @@ -673,55 +760,89 @@ static irqreturn_t exynos_tmu_irq(int irq,
> > void *id) static const struct of_device_id exynos_tmu_match[] = {
> > {
> > .compatible = "samsung,exynos3250-tmu",
> > - .data = &exynos3250_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos4210-tmu",
> > - .data = &exynos4210_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos4412-tmu",
> > - .data = &exynos4412_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos5250-tmu",
> > - .data = &exynos5250_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos5260-tmu",
> > - .data = &exynos5260_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos5420-tmu",
> > - .data = &exynos5420_default_tmu_data,
> > },
> > {
> > .compatible =
> > "samsung,exynos5420-tmu-ext-triminfo",
> > - .data = &exynos5420_default_tmu_data,
> > },
> > {
> > .compatible = "samsung,exynos5440-tmu",
> > - .data = &exynos5440_default_tmu_data,
> > },
> > {},
> > };
> > MODULE_DEVICE_TABLE(of, exynos_tmu_match);
> >
> > -static inline struct exynos_tmu_platform_data
> > *exynos_get_driver_data(
> > - struct platform_device *pdev, int id)
> > +static int exynos_of_get_soc_type(struct device_node *np)
> > {
> > - struct exynos_tmu_init_data *data_table;
> > - struct exynos_tmu_platform_data *tmu_data;
> > - const struct of_device_id *match;
> > + 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,exynos5440-tmu"))
> > + return SOC_ARCH_EXYNOS5440;
> > +
> > + return -EINVAL;
> > +}
> >
> > - match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
> > - if (!match)
> > - return NULL;
> > - data_table = (struct exynos_tmu_init_data *) match->data;
> > - if (!data_table || id >= data_table->tmu_count)
> > - return NULL;
> > - tmu_data = data_table->tmu_data;
> > - return (struct exynos_tmu_platform_data *) (tmu_data + id);
> > +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)
> > @@ -771,14 +892,15 @@ static int exynos_map_dt_data(struct
> > platform_device *pdev) return -EADDRNOTAVAIL;
> > }
> >
> > - pdata = exynos_get_driver_data(pdev, data->id);
> > - if (!pdata) {
> > - dev_err(&pdev->dev, "No platform init data
> > supplied.\n");
> > - return -ENODEV;
> > - }
> > + 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 = pdata->type;
> > + data->soc = exynos_of_get_soc_type(pdev->dev.of_node);
> >
> > switch (data->soc) {
> > case SOC_ARCH_EXYNOS4210:
> > @@ -834,12 +956,16 @@ static int exynos_map_dt_data(struct
> > platform_device *pdev) 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;
> > struct exynos_tmu_platform_data *pdata;
> > - struct thermal_sensor_conf *sensor_conf;
> > - int ret, i;
> > + struct exynos_tmu_data *data;
> > + int ret;
> >
> > data = devm_kzalloc(&pdev->dev, sizeof(struct
> > exynos_tmu_data), GFP_KERNEL);
> > @@ -849,9 +975,15 @@ static int exynos_tmu_probe(struct
> > platform_device *pdev) 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)
> > - return ret;
> > + goto err_sensor;
> >
> > pdata = data->pdata;
> >
> > @@ -860,20 +992,22 @@ static int exynos_tmu_probe(struct
> > platform_device *pdev) data->clk = devm_clk_get(&pdev->dev,
> > "tmu_apbif"); if (IS_ERR(data->clk)) {
> > dev_err(&pdev->dev, "Failed to get clock\n");
> > - return PTR_ERR(data->clk);
> > + 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");
> > - return PTR_ERR(data->clk_sec);
> > + 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");
> > - return ret;
> > + goto err_sensor;
> > }
> > }
> >
> > @@ -889,45 +1023,6 @@ static int exynos_tmu_probe(struct
> > platform_device *pdev) goto err_clk;
> > }
> >
> > - exynos_tmu_control(pdev, true);
> > -
> > - /* Allocate a structure to register with the exynos core
> > thermal */
> > - sensor_conf = devm_kzalloc(&pdev->dev,
> > - sizeof(struct
> > thermal_sensor_conf), GFP_KERNEL);
> > - if (!sensor_conf) {
> > - ret = -ENOMEM;
> > - goto err_clk;
> > - }
> > - sprintf(sensor_conf->name, "therm_zone%d", data->id);
> > - sensor_conf->read_temperature = (int (*)(void
> > *))exynos_tmu_read;
> > - sensor_conf->write_emul_temp =
> > - (int (*)(void *, unsigned
> > long))exynos_tmu_set_emulation;
> > - sensor_conf->driver_data = data;
> > - sensor_conf->trip_data.trip_count =
> > pdata->trigger_enable[0] +
> > - pdata->trigger_enable[1] +
> > pdata->trigger_enable[2]+
> > - pdata->trigger_enable[3];
> > -
> > - for (i = 0; i < sensor_conf->trip_data.trip_count; i++) {
> > - sensor_conf->trip_data.trip_val[i] =
> > - pdata->threshold +
> > pdata->trigger_levels[i];
> > - sensor_conf->trip_data.trip_type[i] =
> > - pdata->trigger_type[i];
> > - }
> > -
> > - sensor_conf->trip_data.trigger_falling =
> > pdata->threshold_falling; -
> > - sensor_conf->dev = &pdev->dev;
> > - /* Register the sensor with thermal management interface */
> > - ret = exynos_register_thermal(sensor_conf);
> > - if (ret) {
> > - if (ret != -EPROBE_DEFER)
> > - dev_err(&pdev->dev,
> > - "Failed to register thermal
> > interface: %d\n",
> > - ret);
> > - goto err_clk;
> > - }
> > - data->reg_conf = sensor_conf;
> > -
> > ret = devm_request_irq(&pdev->dev, data->irq,
> > exynos_tmu_irq, IRQF_TRIGGER_RISING | IRQF_SHARED,
> > dev_name(&pdev->dev), data); if (ret) {
> > @@ -935,21 +1030,25 @@ static int exynos_tmu_probe(struct
> > platform_device *pdev) goto err_clk;
> > }
> >
> > + exynos_tmu_control(pdev, true);
> > return 0;
> > err_clk:
> > clk_unprepare(data->clk);
> > err_clk_sec:
> > if (!IS_ERR(data->clk_sec))
> > clk_unprepare(data->clk_sec);
> > +err_sensor:
> > + 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;
> >
> > - exynos_unregister_thermal(data->reg_conf);
> > -
> > + thermal_zone_of_sensor_unregister(&pdev->dev, tzd);
> > exynos_tmu_control(pdev, false);
> >
> > clk_unprepare(data->clk);
> > diff --git a/drivers/thermal/samsung/exynos_tmu.h
> > b/drivers/thermal/samsung/exynos_tmu.h index 627dec9..d876d4c 100644
> > --- a/drivers/thermal/samsung/exynos_tmu.h
> > +++ b/drivers/thermal/samsung/exynos_tmu.h
> > @@ -23,8 +23,7 @@
> > #ifndef _EXYNOS_TMU_H
> > #define _EXYNOS_TMU_H
> > #include <linux/cpu_cooling.h>
> > -
> > -#include "exynos_thermal_common.h"
> > +#include <dt-bindings/thermal/thermal_exynos.h>
> >
> > enum soc_type {
> > SOC_ARCH_EXYNOS3250 = 1,
> > @@ -36,38 +35,9 @@ enum soc_type {
> > SOC_ARCH_EXYNOS5420_TRIMINFO,
> > SOC_ARCH_EXYNOS5440,
> > };
> > -#include <dt-bindings/thermal/thermal_exynos.h>
> >
> > /**
> > * struct exynos_tmu_platform_data
> > - * @threshold: basic temperature for generating interrupt
> > - * 25 <= threshold <= 125 [unit: degree Celsius]
> > - * @threshold_falling: differntial value for setting threshold
> > - * of temperature falling interrupt.
> > - * @trigger_levels: array for each interrupt levels
> > - * [unit: degree Celsius]
> > - * 0: temperature for trigger_level0 interrupt
> > - * condition for trigger_level0 interrupt:
> > - * current temperature > threshold +
> > trigger_levels[0]
> > - * 1: temperature for trigger_level1 interrupt
> > - * condition for trigger_level1 interrupt:
> > - * current temperature > threshold +
> > trigger_levels[1]
> > - * 2: temperature for trigger_level2 interrupt
> > - * condition for trigger_level2 interrupt:
> > - * current temperature > threshold +
> > trigger_levels[2]
> > - * 3: temperature for trigger_level3 interrupt
> > - * condition for trigger_level3 interrupt:
> > - * current temperature > threshold +
> > trigger_levels[3]
> > - * @trigger_type: defines the type of trigger. Possible values are,
> > - * THROTTLE_ACTIVE trigger type
> > - * THROTTLE_PASSIVE trigger type
> > - * SW_TRIP trigger type
> > - * HW_TRIP
> > - * @trigger_enable[]: array to denote which trigger levels are
> > enabled.
> > - * 1 = enable trigger_level[] interrupt,
> > - * 0 = disable trigger_level[] interrupt
> > - * @max_trigger_level: max trigger level supported by the TMU
> > - * @non_hw_trigger_levels: number of defined non-hardware trigger
> > levels
> > * @gain: gain of amplifier in the positive-TC generator block
> > * 0 < gain <= 15
> > * @reference_voltage: reference voltage of amplifier
> > @@ -79,21 +49,12 @@ enum soc_type {
> > * @efuse_value: platform defined fuse value
> > * @min_efuse_value: minimum valid trimming data
> > * @max_efuse_value: maximum valid trimming data
> > - * @first_point_trim: temp value of the first point trimming
> > - * @second_point_trim: temp value of the second point trimming
> > * @default_temp_offset: default temperature offset in case of no
> > trimming
> > * @cal_type: calibration type for temperature
> > *
> > * This structure is required for configuration of exynos_tmu
> > driver. */
> > struct exynos_tmu_platform_data {
> > - u8 threshold;
> > - u8 threshold_falling;
> > - u8 trigger_levels[MAX_TRIP_COUNT];
> > - enum trigger_type trigger_type[MAX_TRIP_COUNT];
> > - bool trigger_enable[MAX_TRIP_COUNT];
> > - u8 max_trigger_level;
> > - u8 non_hw_trigger_levels;
> > u8 gain;
> > u8 reference_voltage;
> > u8 noise_cancel_mode;
> > @@ -110,18 +71,6 @@ struct exynos_tmu_platform_data {
> > u32 cal_mode;
> > };
> >
> > -/**
> > - * struct exynos_tmu_init_data
> > - * @tmu_count: number of TMU instances.
> > - * @tmu_data: platform data of all TMU instances.
> > - * This structure is required to store data for multi-instance
> > exynos tmu
> > - * driver.
> > - */
> > -struct exynos_tmu_init_data {
> > - int tmu_count;
> > - struct exynos_tmu_platform_data tmu_data[];
> > -};
> > -
> > extern struct exynos_tmu_init_data const
> > exynos3250_default_tmu_data; extern struct exynos_tmu_init_data
> > const exynos4210_default_tmu_data; extern struct
> > exynos_tmu_init_data const exynos4412_default_tmu_data; --
> > 2.0.0.rc2
> >

--
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group