diff options
Diffstat (limited to 'drivers/thermal/st')
| -rw-r--r-- | drivers/thermal/st/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/thermal/st/Makefile | 3 | ||||
| -rw-r--r-- | drivers/thermal/st/st_thermal.c | 315 | ||||
| -rw-r--r-- | drivers/thermal/st/st_thermal.h | 104 | ||||
| -rw-r--r-- | drivers/thermal/st/st_thermal_memmap.c | 209 | ||||
| -rw-r--r-- | drivers/thermal/st/st_thermal_syscfg.c | 178 |
6 files changed, 821 insertions, 0 deletions
diff --git a/drivers/thermal/st/Kconfig b/drivers/thermal/st/Kconfig new file mode 100644 index 000000000..490fdbe22 --- /dev/null +++ b/drivers/thermal/st/Kconfig @@ -0,0 +1,12 @@ +config ST_THERMAL + tristate "Thermal sensors on STMicroelectronics STi series of SoCs" + help + Support for thermal sensors on STMicroelectronics STi series of SoCs. + +config ST_THERMAL_SYSCFG + select ST_THERMAL + tristate "STi series syscfg register access based thermal sensors" + +config ST_THERMAL_MEMMAP + select ST_THERMAL + tristate "STi series memory mapped access based thermal sensors" diff --git a/drivers/thermal/st/Makefile b/drivers/thermal/st/Makefile new file mode 100644 index 000000000..b38878977 --- /dev/null +++ b/drivers/thermal/st/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_ST_THERMAL) := st_thermal.o +obj-$(CONFIG_ST_THERMAL_SYSCFG) += st_thermal_syscfg.o +obj-$(CONFIG_ST_THERMAL_MEMMAP) += st_thermal_memmap.o diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c new file mode 100644 index 000000000..be637e6b0 --- /dev/null +++ b/drivers/thermal/st/st_thermal.c @@ -0,0 +1,315 @@ +/* + * ST Thermal Sensor Driver core routines + * Author: Ajit Pal Singh <ajitpal.singh@st.com> + * + * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited + * + * 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. + * + */ + +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include "st_thermal.h" + +/* The Thermal Framework expects millidegrees */ +#define mcelsius(temp) ((temp) * 1000) + +/* + * Function to allocate regfields which are common + * between syscfg and memory mapped based sensors + */ +static int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + struct regmap *regmap = sensor->regmap; + const struct reg_field *reg_fields = sensor->cdata->reg_fields; + + sensor->dcorrect = devm_regmap_field_alloc(dev, regmap, + reg_fields[DCORRECT]); + + sensor->overflow = devm_regmap_field_alloc(dev, regmap, + reg_fields[OVERFLOW]); + + sensor->temp_data = devm_regmap_field_alloc(dev, regmap, + reg_fields[DATA]); + + if (IS_ERR(sensor->dcorrect) || + IS_ERR(sensor->overflow) || + IS_ERR(sensor->temp_data)) { + dev_err(dev, "failed to allocate common regfields\n"); + return -EINVAL; + } + + return sensor->ops->alloc_regfields(sensor); +} + +static int st_thermal_sensor_on(struct st_thermal_sensor *sensor) +{ + int ret; + struct device *dev = sensor->dev; + + ret = clk_prepare_enable(sensor->clk); + if (ret) { + dev_err(dev, "failed to enable clk\n"); + return ret; + } + + ret = sensor->ops->power_ctrl(sensor, POWER_ON); + if (ret) { + dev_err(dev, "failed to power on sensor\n"); + clk_disable_unprepare(sensor->clk); + } + + return ret; +} + +static int st_thermal_sensor_off(struct st_thermal_sensor *sensor) +{ + int ret; + + ret = sensor->ops->power_ctrl(sensor, POWER_OFF); + if (ret) + return ret; + + clk_disable_unprepare(sensor->clk); + + return 0; +} + +static int st_thermal_calibration(struct st_thermal_sensor *sensor) +{ + int ret; + unsigned int val; + struct device *dev = sensor->dev; + + /* Check if sensor calibration data is already written */ + ret = regmap_field_read(sensor->dcorrect, &val); + if (ret) { + dev_err(dev, "failed to read calibration data\n"); + return ret; + } + + if (!val) { + /* + * Sensor calibration value not set by bootloader, + * default calibration data to be used + */ + ret = regmap_field_write(sensor->dcorrect, + sensor->cdata->calibration_val); + if (ret) + dev_err(dev, "failed to set calibration data\n"); + } + + return ret; +} + +/* Callback to get temperature from HW*/ +static int st_thermal_get_temp(struct thermal_zone_device *th, int *temperature) +{ + struct st_thermal_sensor *sensor = th->devdata; + struct device *dev = sensor->dev; + unsigned int temp; + unsigned int overflow; + int ret; + + ret = regmap_field_read(sensor->overflow, &overflow); + if (ret) + return ret; + if (overflow) + return -EIO; + + ret = regmap_field_read(sensor->temp_data, &temp); + if (ret) + return ret; + + temp += sensor->cdata->temp_adjust_val; + temp = mcelsius(temp); + + dev_dbg(dev, "temperature: %d\n", temp); + + *temperature = temp; + + return 0; +} + +static int st_thermal_get_trip_type(struct thermal_zone_device *th, + int trip, enum thermal_trip_type *type) +{ + struct st_thermal_sensor *sensor = th->devdata; + struct device *dev = sensor->dev; + + switch (trip) { + case 0: + *type = THERMAL_TRIP_CRITICAL; + break; + default: + dev_err(dev, "invalid trip point\n"); + return -EINVAL; + } + + return 0; +} + +static int st_thermal_get_trip_temp(struct thermal_zone_device *th, + int trip, int *temp) +{ + struct st_thermal_sensor *sensor = th->devdata; + struct device *dev = sensor->dev; + + switch (trip) { + case 0: + *temp = mcelsius(sensor->cdata->crit_temp); + break; + default: + dev_err(dev, "Invalid trip point\n"); + return -EINVAL; + } + + return 0; +} + +static struct thermal_zone_device_ops st_tz_ops = { + .get_temp = st_thermal_get_temp, + .get_trip_type = st_thermal_get_trip_type, + .get_trip_temp = st_thermal_get_trip_temp, +}; + +int st_thermal_register(struct platform_device *pdev, + const struct of_device_id *st_thermal_of_match) +{ + struct st_thermal_sensor *sensor; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + const struct of_device_id *match; + + int polling_delay; + int ret; + + if (!np) { + dev_err(dev, "device tree node not found\n"); + return -EINVAL; + } + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return -ENOMEM; + + sensor->dev = dev; + + match = of_match_device(st_thermal_of_match, dev); + if (!(match && match->data)) + return -EINVAL; + + sensor->cdata = match->data; + if (!sensor->cdata->ops) + return -EINVAL; + + sensor->ops = sensor->cdata->ops; + + ret = (sensor->ops->regmap_init)(sensor); + if (ret) + return ret; + + ret = st_thermal_alloc_regfields(sensor); + if (ret) + return ret; + + sensor->clk = devm_clk_get(dev, "thermal"); + if (IS_ERR(sensor->clk)) { + dev_err(dev, "failed to fetch clock\n"); + return PTR_ERR(sensor->clk); + } + + if (sensor->ops->register_enable_irq) { + ret = sensor->ops->register_enable_irq(sensor); + if (ret) + return ret; + } + + ret = st_thermal_sensor_on(sensor); + if (ret) + return ret; + + ret = st_thermal_calibration(sensor); + if (ret) + goto sensor_off; + + polling_delay = sensor->ops->register_enable_irq ? 0 : 1000; + + sensor->thermal_dev = + thermal_zone_device_register(dev_name(dev), 1, 0, sensor, + &st_tz_ops, NULL, 0, polling_delay); + if (IS_ERR(sensor->thermal_dev)) { + dev_err(dev, "failed to register thermal zone device\n"); + ret = PTR_ERR(sensor->thermal_dev); + goto sensor_off; + } + + platform_set_drvdata(pdev, sensor); + + return 0; + +sensor_off: + st_thermal_sensor_off(sensor); + + return ret; +} +EXPORT_SYMBOL_GPL(st_thermal_register); + +int st_thermal_unregister(struct platform_device *pdev) +{ + struct st_thermal_sensor *sensor = platform_get_drvdata(pdev); + + st_thermal_sensor_off(sensor); + thermal_zone_device_unregister(sensor->thermal_dev); + + return 0; +} +EXPORT_SYMBOL_GPL(st_thermal_unregister); + +#ifdef CONFIG_PM_SLEEP +static int st_thermal_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct st_thermal_sensor *sensor = platform_get_drvdata(pdev); + + return st_thermal_sensor_off(sensor); +} + +static int st_thermal_resume(struct device *dev) +{ + int ret; + struct platform_device *pdev = to_platform_device(dev); + struct st_thermal_sensor *sensor = platform_get_drvdata(pdev); + + ret = st_thermal_sensor_on(sensor); + if (ret) + return ret; + + ret = st_thermal_calibration(sensor); + if (ret) + return ret; + + if (sensor->ops->enable_irq) { + ret = sensor->ops->enable_irq(sensor); + if (ret) + return ret; + } + + return 0; +} +#endif + +SIMPLE_DEV_PM_OPS(st_thermal_pm_ops, st_thermal_suspend, st_thermal_resume); +EXPORT_SYMBOL_GPL(st_thermal_pm_ops); + +MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/st/st_thermal.h b/drivers/thermal/st/st_thermal.h new file mode 100644 index 000000000..fecafbe10 --- /dev/null +++ b/drivers/thermal/st/st_thermal.h @@ -0,0 +1,104 @@ +/* + * ST Thermal Sensor Driver for STi series of SoCs + * Author: Ajit Pal Singh <ajitpal.singh@st.com> + * + * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited + * + * 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. + */ + +#ifndef __STI_THERMAL_SYSCFG_H +#define __STI_THERMAL_SYSCFG_H + +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/thermal.h> + +enum st_thermal_regfield_ids { + INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */ + TEMP_PWR = 0, + DCORRECT, + OVERFLOW, + DATA, + INT_ENABLE, + + MAX_REGFIELDS +}; + +/* Thermal sensor power states */ +enum st_thermal_power_state { + POWER_OFF = 0, + POWER_ON +}; + +struct st_thermal_sensor; + +/** + * Description of private thermal sensor ops. + * + * @power_ctrl: Function for powering on/off a sensor. Clock to the + * sensor is also controlled from this function. + * @alloc_regfields: Allocate regmap register fields, specific to a sensor. + * @do_memmap_regmap: Memory map the thermal register space and init regmap + * instance or find regmap instance. + * @register_irq: Register an interrupt handler for a sensor. + */ +struct st_thermal_sensor_ops { + int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state); + int (*alloc_regfields)(struct st_thermal_sensor *); + int (*regmap_init)(struct st_thermal_sensor *); + int (*register_enable_irq)(struct st_thermal_sensor *); + int (*enable_irq)(struct st_thermal_sensor *); +}; + +/** + * Description of thermal driver compatible data. + * + * @reg_fields: Pointer to the regfields array for a sensor. + * @sys_compat: Pointer to the syscon node compatible string. + * @ops: Pointer to private thermal ops for a sensor. + * @calibration_val: Default calibration value to be written to the DCORRECT + * register field for a sensor. + * @temp_adjust_val: Value to be added/subtracted from the data read from + * the sensor. If value needs to be added please provide a + * positive value and if it is to be subtracted please + * provide a negative value. + * @crit_temp: The temperature beyond which the SoC should be shutdown + * to prevent damage. + */ +struct st_thermal_compat_data { + char *sys_compat; + const struct reg_field *reg_fields; + const struct st_thermal_sensor_ops *ops; + unsigned int calibration_val; + int temp_adjust_val; + int crit_temp; +}; + +struct st_thermal_sensor { + struct device *dev; + struct thermal_zone_device *thermal_dev; + const struct st_thermal_sensor_ops *ops; + const struct st_thermal_compat_data *cdata; + struct clk *clk; + struct regmap *regmap; + struct regmap_field *pwr; + struct regmap_field *dcorrect; + struct regmap_field *overflow; + struct regmap_field *temp_data; + struct regmap_field *int_thresh_hi; + struct regmap_field *int_enable; + int irq; + void __iomem *mmio_base; +}; + +extern int st_thermal_register(struct platform_device *pdev, + const struct of_device_id *st_thermal_of_match); +extern int st_thermal_unregister(struct platform_device *pdev); +extern const struct dev_pm_ops st_thermal_pm_ops; + +#endif /* __STI_RESET_SYSCFG_H */ diff --git a/drivers/thermal/st/st_thermal_memmap.c b/drivers/thermal/st/st_thermal_memmap.c new file mode 100644 index 000000000..91d42319d --- /dev/null +++ b/drivers/thermal/st/st_thermal_memmap.c @@ -0,0 +1,209 @@ +/* + * ST Thermal Sensor Driver for memory mapped sensors. + * Author: Ajit Pal Singh <ajitpal.singh@st.com> + * + * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited + * + * 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. + */ + +#include <linux/of.h> +#include <linux/module.h> + +#include "st_thermal.h" + +#define STIH416_MPE_CONF 0x0 +#define STIH416_MPE_STATUS 0x4 +#define STIH416_MPE_INT_THRESH 0x8 +#define STIH416_MPE_INT_EN 0xC + +/* Power control bits for the memory mapped thermal sensor */ +#define THERMAL_PDN BIT(4) +#define THERMAL_SRSTN BIT(10) + +static const struct reg_field st_mmap_thermal_regfields[MAX_REGFIELDS] = { + /* + * According to the STIH416 MPE temp sensor data sheet - + * the PDN (Power Down Bit) and SRSTN (Soft Reset Bit) need to be + * written simultaneously for powering on and off the temperature + * sensor. regmap_update_bits() will be used to update the register. + */ + [INT_THRESH_HI] = REG_FIELD(STIH416_MPE_INT_THRESH, 0, 7), + [DCORRECT] = REG_FIELD(STIH416_MPE_CONF, 5, 9), + [OVERFLOW] = REG_FIELD(STIH416_MPE_STATUS, 9, 9), + [DATA] = REG_FIELD(STIH416_MPE_STATUS, 11, 18), + [INT_ENABLE] = REG_FIELD(STIH416_MPE_INT_EN, 0, 0), +}; + +static irqreturn_t st_mmap_thermal_trip_handler(int irq, void *sdata) +{ + struct st_thermal_sensor *sensor = sdata; + + thermal_zone_device_update(sensor->thermal_dev, + THERMAL_EVENT_UNSPECIFIED); + + return IRQ_HANDLED; +} + +/* Private ops for the Memory Mapped based thermal sensors */ +static int st_mmap_power_ctrl(struct st_thermal_sensor *sensor, + enum st_thermal_power_state power_state) +{ + const unsigned int mask = (THERMAL_PDN | THERMAL_SRSTN); + const unsigned int val = power_state ? mask : 0; + + return regmap_update_bits(sensor->regmap, STIH416_MPE_CONF, mask, val); +} + +static int st_mmap_alloc_regfields(struct st_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + struct regmap *regmap = sensor->regmap; + const struct reg_field *reg_fields = sensor->cdata->reg_fields; + + sensor->int_thresh_hi = devm_regmap_field_alloc(dev, regmap, + reg_fields[INT_THRESH_HI]); + sensor->int_enable = devm_regmap_field_alloc(dev, regmap, + reg_fields[INT_ENABLE]); + + if (IS_ERR(sensor->int_thresh_hi) || IS_ERR(sensor->int_enable)) { + dev_err(dev, "failed to alloc mmap regfields\n"); + return -EINVAL; + } + + return 0; +} + +static int st_mmap_enable_irq(struct st_thermal_sensor *sensor) +{ + int ret; + + /* Set upper critical threshold */ + ret = regmap_field_write(sensor->int_thresh_hi, + sensor->cdata->crit_temp - + sensor->cdata->temp_adjust_val); + if (ret) + return ret; + + return regmap_field_write(sensor->int_enable, 1); +} + +static int st_mmap_register_enable_irq(struct st_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + struct platform_device *pdev = to_platform_device(dev); + int ret; + + sensor->irq = platform_get_irq(pdev, 0); + if (sensor->irq < 0) { + dev_err(dev, "failed to register IRQ\n"); + return sensor->irq; + } + + ret = devm_request_threaded_irq(dev, sensor->irq, + NULL, st_mmap_thermal_trip_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev->driver->name, sensor); + if (ret) { + dev_err(dev, "failed to register IRQ %d\n", sensor->irq); + return ret; + } + + return st_mmap_enable_irq(sensor); +} + +static const struct regmap_config st_416mpe_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int st_mmap_regmap_init(struct st_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + struct platform_device *pdev = to_platform_device(dev); + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "no memory resources defined\n"); + return -ENODEV; + } + + sensor->mmio_base = devm_ioremap_resource(dev, res); + if (IS_ERR(sensor->mmio_base)) { + dev_err(dev, "failed to remap IO\n"); + return PTR_ERR(sensor->mmio_base); + } + + sensor->regmap = devm_regmap_init_mmio(dev, sensor->mmio_base, + &st_416mpe_regmap_config); + if (IS_ERR(sensor->regmap)) { + dev_err(dev, "failed to initialise regmap\n"); + return PTR_ERR(sensor->regmap); + } + + return 0; +} + +static const struct st_thermal_sensor_ops st_mmap_sensor_ops = { + .power_ctrl = st_mmap_power_ctrl, + .alloc_regfields = st_mmap_alloc_regfields, + .regmap_init = st_mmap_regmap_init, + .register_enable_irq = st_mmap_register_enable_irq, + .enable_irq = st_mmap_enable_irq, +}; + +/* Compatible device data stih416 mpe thermal sensor */ +static const struct st_thermal_compat_data st_416mpe_cdata = { + .reg_fields = st_mmap_thermal_regfields, + .ops = &st_mmap_sensor_ops, + .calibration_val = 14, + .temp_adjust_val = -95, + .crit_temp = 120, +}; + +/* Compatible device data stih407 thermal sensor */ +static const struct st_thermal_compat_data st_407_cdata = { + .reg_fields = st_mmap_thermal_regfields, + .ops = &st_mmap_sensor_ops, + .calibration_val = 16, + .temp_adjust_val = -95, + .crit_temp = 120, +}; + +static const struct of_device_id st_mmap_thermal_of_match[] = { + { .compatible = "st,stih416-mpe-thermal", .data = &st_416mpe_cdata }, + { .compatible = "st,stih407-thermal", .data = &st_407_cdata }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, st_mmap_thermal_of_match); + +static int st_mmap_probe(struct platform_device *pdev) +{ + return st_thermal_register(pdev, st_mmap_thermal_of_match); +} + +static int st_mmap_remove(struct platform_device *pdev) +{ + return st_thermal_unregister(pdev); +} + +static struct platform_driver st_mmap_thermal_driver = { + .driver = { + .name = "st_thermal_mmap", + .pm = &st_thermal_pm_ops, + .of_match_table = st_mmap_thermal_of_match, + }, + .probe = st_mmap_probe, + .remove = st_mmap_remove, +}; + +module_platform_driver(st_mmap_thermal_driver); + +MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/st/st_thermal_syscfg.c b/drivers/thermal/st/st_thermal_syscfg.c new file mode 100644 index 000000000..3df5b7890 --- /dev/null +++ b/drivers/thermal/st/st_thermal_syscfg.c @@ -0,0 +1,178 @@ +/* + * ST Thermal Sensor Driver for syscfg based sensors. + * Author: Ajit Pal Singh <ajitpal.singh@st.com> + * + * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited + * + * 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. + */ + +#include <linux/of.h> +#include <linux/module.h> +#include <linux/mfd/syscon.h> + +#include "st_thermal.h" + +/* STiH415 */ +#define STIH415_SYSCFG_FRONT(num) ((num - 100) * 4) +#define STIH415_SAS_THSENS_CONF STIH415_SYSCFG_FRONT(178) +#define STIH415_SAS_THSENS_STATUS STIH415_SYSCFG_FRONT(198) +#define STIH415_SYSCFG_MPE(num) ((num - 600) * 4) +#define STIH415_MPE_THSENS_CONF STIH415_SYSCFG_MPE(607) +#define STIH415_MPE_THSENS_STATUS STIH415_SYSCFG_MPE(667) + +/* STiH416 */ +#define STIH416_SYSCFG_FRONT(num) ((num - 1000) * 4) +#define STIH416_SAS_THSENS_CONF STIH416_SYSCFG_FRONT(1552) +#define STIH416_SAS_THSENS_STATUS1 STIH416_SYSCFG_FRONT(1554) +#define STIH416_SAS_THSENS_STATUS2 STIH416_SYSCFG_FRONT(1594) + +/* STiD127 */ +#define STID127_SYSCFG_CPU(num) ((num - 700) * 4) +#define STID127_THSENS_CONF STID127_SYSCFG_CPU(743) +#define STID127_THSENS_STATUS STID127_SYSCFG_CPU(767) + +static const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = { + [TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF, 9, 9), + [DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF, 4, 8), + [OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8, 8), + [DATA] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16), +}; + +static const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = { + [TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF, 8, 8), + [DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF, 3, 7), + [OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9, 9), + [DATA] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18), +}; + +static const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = { + [TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF, 9, 9), + [DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF, 4, 8), + [OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8, 8), + [DATA] = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16), +}; + +static const struct reg_field st_127_regfields[MAX_REGFIELDS] = { + [TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF, 7, 7), + [DCORRECT] = REG_FIELD(STID127_THSENS_CONF, 2, 6), + [OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9, 9), + [DATA] = REG_FIELD(STID127_THSENS_STATUS, 11, 18), +}; + +/* Private OPs for System Configuration Register based thermal sensors */ +static int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor, + enum st_thermal_power_state power_state) +{ + return regmap_field_write(sensor->pwr, power_state); +} + +static int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + + sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap, + sensor->cdata->reg_fields[TEMP_PWR]); + + if (IS_ERR(sensor->pwr)) { + dev_err(dev, "failed to alloc syscfg regfields\n"); + return PTR_ERR(sensor->pwr); + } + + return 0; +} + +static int st_syscfg_regmap_init(struct st_thermal_sensor *sensor) +{ + sensor->regmap = + syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat); + if (IS_ERR(sensor->regmap)) { + dev_err(sensor->dev, "failed to find syscfg regmap\n"); + return PTR_ERR(sensor->regmap); + } + + return 0; +} + +static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = { + .power_ctrl = st_syscfg_power_ctrl, + .alloc_regfields = st_syscfg_alloc_regfields, + .regmap_init = st_syscfg_regmap_init, +}; + +/* Compatible device data for stih415 sas thermal sensor */ +static const struct st_thermal_compat_data st_415sas_cdata = { + .sys_compat = "st,stih415-front-syscfg", + .reg_fields = st_415sas_regfields, + .ops = &st_syscfg_sensor_ops, + .calibration_val = 16, + .temp_adjust_val = 20, + .crit_temp = 120, +}; + +/* Compatible device data for stih415 mpe thermal sensor */ +static const struct st_thermal_compat_data st_415mpe_cdata = { + .sys_compat = "st,stih415-system-syscfg", + .reg_fields = st_415mpe_regfields, + .ops = &st_syscfg_sensor_ops, + .calibration_val = 16, + .temp_adjust_val = -103, + .crit_temp = 120, +}; + +/* Compatible device data for stih416 sas thermal sensor */ +static const struct st_thermal_compat_data st_416sas_cdata = { + .sys_compat = "st,stih416-front-syscfg", + .reg_fields = st_416sas_regfields, + .ops = &st_syscfg_sensor_ops, + .calibration_val = 16, + .temp_adjust_val = 20, + .crit_temp = 120, +}; + +/* Compatible device data for stid127 thermal sensor */ +static const struct st_thermal_compat_data st_127_cdata = { + .sys_compat = "st,stid127-cpu-syscfg", + .reg_fields = st_127_regfields, + .ops = &st_syscfg_sensor_ops, + .calibration_val = 8, + .temp_adjust_val = -103, + .crit_temp = 120, +}; + +static const struct of_device_id st_syscfg_thermal_of_match[] = { + { .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata }, + { .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata }, + { .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata }, + { .compatible = "st,stid127-thermal", .data = &st_127_cdata }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match); + +static int st_syscfg_probe(struct platform_device *pdev) +{ + return st_thermal_register(pdev, st_syscfg_thermal_of_match); +} + +static int st_syscfg_remove(struct platform_device *pdev) +{ + return st_thermal_unregister(pdev); +} + +static struct platform_driver st_syscfg_thermal_driver = { + .driver = { + .name = "st_syscfg_thermal", + .pm = &st_thermal_pm_ops, + .of_match_table = st_syscfg_thermal_of_match, + }, + .probe = st_syscfg_probe, + .remove = st_syscfg_remove, +}; +module_platform_driver(st_syscfg_thermal_driver); + +MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver"); +MODULE_LICENSE("GPL v2"); |