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-rw-r--r--drivers/thermal/st/Kconfig27
-rw-r--r--drivers/thermal/st/Makefile5
-rw-r--r--drivers/thermal/st/st_thermal.c313
-rw-r--r--drivers/thermal/st/st_thermal.h100
-rw-r--r--drivers/thermal/st/st_thermal_memmap.c194
-rw-r--r--drivers/thermal/st/st_thermal_syscfg.c174
-rw-r--r--drivers/thermal/st/stm_thermal.c602
7 files changed, 1415 insertions, 0 deletions
diff --git a/drivers/thermal/st/Kconfig b/drivers/thermal/st/Kconfig
new file mode 100644
index 000000000..58ece3819
--- /dev/null
+++ b/drivers/thermal/st/Kconfig
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# STMicroelectronics thermal drivers configuration
+#
+
+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"
+
+config STM32_THERMAL
+ tristate "Thermal framework support on STMicroelectronics STM32 series of SoCs"
+ depends on MACH_STM32MP157
+ default y
+ help
+ Support for thermal framework on STMicroelectronics STM32 series of
+ SoCs. This thermal driver allows to access to general thermal framework
+ functionalities and to access to SoC sensor functionalities. This
+ configuration is fully dependent of MACH_STM32MP157.
diff --git a/drivers/thermal/st/Makefile b/drivers/thermal/st/Makefile
new file mode 100644
index 000000000..c4cfa3c4a
--- /dev/null
+++ b/drivers/thermal/st/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_ST_THERMAL) := st_thermal.o
+obj-$(CONFIG_ST_THERMAL_SYSCFG) += st_thermal_syscfg.o
+obj-$(CONFIG_ST_THERMAL_MEMMAP) += st_thermal_memmap.o
+obj-$(CONFIG_STM32_THERMAL) += stm_thermal.o
diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c
new file mode 100644
index 000000000..1276b9560
--- /dev/null
+++ b/drivers/thermal/st/st_thermal.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ST Thermal Sensor Driver core routines
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ */
+
+#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;
+ }
+ ret = thermal_zone_device_enable(sensor->thermal_dev);
+ if (ret)
+ goto tzd_unregister;
+
+ platform_set_drvdata(pdev, sensor);
+
+ return 0;
+
+tzd_unregister:
+ thermal_zone_device_unregister(sensor->thermal_dev);
+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 st_thermal_sensor *sensor = dev_get_drvdata(dev);
+
+ return st_thermal_sensor_off(sensor);
+}
+
+static int st_thermal_resume(struct device *dev)
+{
+ int ret;
+ struct st_thermal_sensor *sensor = dev_get_drvdata(dev);
+
+ 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..d661b2f2e
--- /dev/null
+++ b/drivers/thermal/st/st_thermal.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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
+ */
+
+#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..d68596c40
--- /dev/null
+++ b/drivers/thermal/st/st_thermal_memmap.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ST Thermal Sensor Driver for memory mapped sensors.
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ */
+
+#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)
+ 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);
+
+ sensor->mmio_base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
+ if (IS_ERR(sensor->mmio_base))
+ 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..94efecf35
--- /dev/null
+++ b/drivers/thermal/st/st_thermal_syscfg.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ST Thermal Sensor Driver for syscfg based sensors.
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ */
+
+#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");
diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c
new file mode 100644
index 000000000..78feb802a
--- /dev/null
+++ b/drivers/thermal/st/stm_thermal.c
@@ -0,0 +1,602 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics 2018 - All Rights Reserved
+ * Author: David Hernandez Sanchez <david.hernandezsanchez@st.com> for
+ * STMicroelectronics.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/thermal.h>
+
+#include "../thermal_core.h"
+#include "../thermal_hwmon.h"
+
+/* DTS register offsets */
+#define DTS_CFGR1_OFFSET 0x0
+#define DTS_T0VALR1_OFFSET 0x8
+#define DTS_RAMPVALR_OFFSET 0X10
+#define DTS_ITR1_OFFSET 0x14
+#define DTS_DR_OFFSET 0x1C
+#define DTS_SR_OFFSET 0x20
+#define DTS_ITENR_OFFSET 0x24
+#define DTS_ICIFR_OFFSET 0x28
+
+/* DTS_CFGR1 register mask definitions */
+#define HSREF_CLK_DIV_MASK GENMASK(30, 24)
+#define TS1_SMP_TIME_MASK GENMASK(19, 16)
+#define TS1_INTRIG_SEL_MASK GENMASK(11, 8)
+
+/* DTS_T0VALR1 register mask definitions */
+#define TS1_T0_MASK GENMASK(17, 16)
+#define TS1_FMT0_MASK GENMASK(15, 0)
+
+/* DTS_RAMPVALR register mask definitions */
+#define TS1_RAMP_COEFF_MASK GENMASK(15, 0)
+
+/* DTS_ITR1 register mask definitions */
+#define TS1_HITTHD_MASK GENMASK(31, 16)
+#define TS1_LITTHD_MASK GENMASK(15, 0)
+
+/* DTS_DR register mask definitions */
+#define TS1_MFREQ_MASK GENMASK(15, 0)
+
+/* DTS_ITENR register mask definitions */
+#define ITENR_MASK (GENMASK(2, 0) | GENMASK(6, 4))
+
+/* DTS_ICIFR register mask definitions */
+#define ICIFR_MASK (GENMASK(2, 0) | GENMASK(6, 4))
+
+/* Less significant bit position definitions */
+#define TS1_T0_POS 16
+#define TS1_HITTHD_POS 16
+#define TS1_LITTHD_POS 0
+#define HSREF_CLK_DIV_POS 24
+
+/* DTS_CFGR1 bit definitions */
+#define TS1_EN BIT(0)
+#define TS1_START BIT(4)
+#define REFCLK_SEL BIT(20)
+#define REFCLK_LSE REFCLK_SEL
+#define Q_MEAS_OPT BIT(21)
+#define CALIBRATION_CONTROL Q_MEAS_OPT
+
+/* DTS_SR bit definitions */
+#define TS_RDY BIT(15)
+/* Bit definitions below are common for DTS_SR, DTS_ITENR and DTS_CIFR */
+#define HIGH_THRESHOLD BIT(2)
+#define LOW_THRESHOLD BIT(1)
+
+/* Constants */
+#define ADJUST 100
+#define ONE_MHZ 1000000
+#define POLL_TIMEOUT 5000
+#define STARTUP_TIME 40
+#define TS1_T0_VAL0 30000 /* 30 celsius */
+#define TS1_T0_VAL1 130000 /* 130 celsius */
+#define NO_HW_TRIG 0
+#define SAMPLING_TIME 15
+
+struct stm_thermal_sensor {
+ struct device *dev;
+ struct thermal_zone_device *th_dev;
+ enum thermal_device_mode mode;
+ struct clk *clk;
+ unsigned int low_temp_enabled;
+ unsigned int high_temp_enabled;
+ int irq;
+ void __iomem *base;
+ int t0, fmt0, ramp_coeff;
+};
+
+static int stm_enable_irq(struct stm_thermal_sensor *sensor)
+{
+ u32 value;
+
+ dev_dbg(sensor->dev, "low:%d high:%d\n", sensor->low_temp_enabled,
+ sensor->high_temp_enabled);
+
+ /* Disable IT generation for low and high thresholds */
+ value = readl_relaxed(sensor->base + DTS_ITENR_OFFSET);
+ value &= ~(LOW_THRESHOLD | HIGH_THRESHOLD);
+
+ if (sensor->low_temp_enabled)
+ value |= HIGH_THRESHOLD;
+
+ if (sensor->high_temp_enabled)
+ value |= LOW_THRESHOLD;
+
+ /* Enable interrupts */
+ writel_relaxed(value, sensor->base + DTS_ITENR_OFFSET);
+
+ return 0;
+}
+
+static irqreturn_t stm_thermal_irq_handler(int irq, void *sdata)
+{
+ struct stm_thermal_sensor *sensor = sdata;
+
+ dev_dbg(sensor->dev, "sr:%d\n",
+ readl_relaxed(sensor->base + DTS_SR_OFFSET));
+
+ thermal_zone_device_update(sensor->th_dev, THERMAL_EVENT_UNSPECIFIED);
+
+ stm_enable_irq(sensor);
+
+ /* Acknoledge all DTS irqs */
+ writel_relaxed(ICIFR_MASK, sensor->base + DTS_ICIFR_OFFSET);
+
+ return IRQ_HANDLED;
+}
+
+static int stm_sensor_power_on(struct stm_thermal_sensor *sensor)
+{
+ int ret;
+ u32 value;
+
+ /* Enable sensor */
+ value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET);
+ value |= TS1_EN;
+ writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET);
+
+ /*
+ * The DTS block can be enabled by setting TSx_EN bit in
+ * DTS_CFGRx register. It requires a startup time of
+ * 40μs. Use 5 ms as arbitrary timeout.
+ */
+ ret = readl_poll_timeout(sensor->base + DTS_SR_OFFSET,
+ value, (value & TS_RDY),
+ STARTUP_TIME, POLL_TIMEOUT);
+ if (ret)
+ return ret;
+
+ /* Start continuous measuring */
+ value = readl_relaxed(sensor->base +
+ DTS_CFGR1_OFFSET);
+ value |= TS1_START;
+ writel_relaxed(value, sensor->base +
+ DTS_CFGR1_OFFSET);
+
+ sensor->mode = THERMAL_DEVICE_ENABLED;
+
+ return 0;
+}
+
+static int stm_sensor_power_off(struct stm_thermal_sensor *sensor)
+{
+ u32 value;
+
+ sensor->mode = THERMAL_DEVICE_DISABLED;
+
+ /* Stop measuring */
+ value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET);
+ value &= ~TS1_START;
+ writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET);
+
+ /* Ensure stop is taken into account */
+ usleep_range(STARTUP_TIME, POLL_TIMEOUT);
+
+ /* Disable sensor */
+ value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET);
+ value &= ~TS1_EN;
+ writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET);
+
+ /* Ensure disable is taken into account */
+ return readl_poll_timeout(sensor->base + DTS_SR_OFFSET, value,
+ !(value & TS_RDY),
+ STARTUP_TIME, POLL_TIMEOUT);
+}
+
+static int stm_thermal_calibration(struct stm_thermal_sensor *sensor)
+{
+ u32 value, clk_freq;
+ u32 prescaler;
+
+ /* Figure out prescaler value for PCLK during calibration */
+ clk_freq = clk_get_rate(sensor->clk);
+ if (!clk_freq)
+ return -EINVAL;
+
+ prescaler = 0;
+ clk_freq /= ONE_MHZ;
+ if (clk_freq) {
+ while (prescaler <= clk_freq)
+ prescaler++;
+ }
+
+ value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET);
+
+ /* Clear prescaler */
+ value &= ~HSREF_CLK_DIV_MASK;
+
+ /* Set prescaler. pclk_freq/prescaler < 1MHz */
+ value |= (prescaler << HSREF_CLK_DIV_POS);
+
+ /* Select PCLK as reference clock */
+ value &= ~REFCLK_SEL;
+
+ /* Set maximal sampling time for better precision */
+ value |= TS1_SMP_TIME_MASK;
+
+ /* Measure with calibration */
+ value &= ~CALIBRATION_CONTROL;
+
+ /* select trigger */
+ value &= ~TS1_INTRIG_SEL_MASK;
+ value |= NO_HW_TRIG;
+
+ writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET);
+
+ return 0;
+}
+
+/* Fill in DTS structure with factory sensor values */
+static int stm_thermal_read_factory_settings(struct stm_thermal_sensor *sensor)
+{
+ /* Retrieve engineering calibration temperature */
+ sensor->t0 = readl_relaxed(sensor->base + DTS_T0VALR1_OFFSET) &
+ TS1_T0_MASK;
+ if (!sensor->t0)
+ sensor->t0 = TS1_T0_VAL0;
+ else
+ sensor->t0 = TS1_T0_VAL1;
+
+ /* Retrieve fmt0 and put it on Hz */
+ sensor->fmt0 = ADJUST * (readl_relaxed(sensor->base +
+ DTS_T0VALR1_OFFSET) & TS1_FMT0_MASK);
+
+ /* Retrieve ramp coefficient */
+ sensor->ramp_coeff = readl_relaxed(sensor->base + DTS_RAMPVALR_OFFSET) &
+ TS1_RAMP_COEFF_MASK;
+
+ if (!sensor->fmt0 || !sensor->ramp_coeff) {
+ dev_err(sensor->dev, "%s: wrong setting\n", __func__);
+ return -EINVAL;
+ }
+
+ dev_dbg(sensor->dev, "%s: T0 = %doC, FMT0 = %dHz, RAMP_COEFF = %dHz/oC",
+ __func__, sensor->t0, sensor->fmt0, sensor->ramp_coeff);
+
+ return 0;
+}
+
+static int stm_thermal_calculate_threshold(struct stm_thermal_sensor *sensor,
+ int temp, u32 *th)
+{
+ int freqM;
+
+ /* Figure out the CLK_PTAT frequency for a given temperature */
+ freqM = ((temp - sensor->t0) * sensor->ramp_coeff) / 1000 +
+ sensor->fmt0;
+
+ /* Figure out the threshold sample number */
+ *th = clk_get_rate(sensor->clk) * SAMPLING_TIME / freqM;
+ if (!*th)
+ return -EINVAL;
+
+ dev_dbg(sensor->dev, "freqM=%d Hz, threshold=0x%x", freqM, *th);
+
+ return 0;
+}
+
+/* Disable temperature interrupt */
+static int stm_disable_irq(struct stm_thermal_sensor *sensor)
+{
+ u32 value;
+
+ /* Disable IT generation */
+ value = readl_relaxed(sensor->base + DTS_ITENR_OFFSET);
+ value &= ~ITENR_MASK;
+ writel_relaxed(value, sensor->base + DTS_ITENR_OFFSET);
+
+ return 0;
+}
+
+static int stm_thermal_set_trips(struct thermal_zone_device *tz, int low, int high)
+{
+ struct stm_thermal_sensor *sensor = tz->devdata;
+ u32 itr1, th;
+ int ret;
+
+ dev_dbg(sensor->dev, "set trips %d <--> %d\n", low, high);
+
+ /* Erase threshold content */
+ itr1 = readl_relaxed(sensor->base + DTS_ITR1_OFFSET);
+ itr1 &= ~(TS1_LITTHD_MASK | TS1_HITTHD_MASK);
+
+ /*
+ * Disable low-temp if "low" is too small. As per thermal framework
+ * API, we use -INT_MAX rather than INT_MIN.
+ */
+
+ if (low > -INT_MAX) {
+ sensor->low_temp_enabled = 1;
+ /* add 0.5 of hysteresis due to measurement error */
+ ret = stm_thermal_calculate_threshold(sensor, low - 500, &th);
+ if (ret)
+ return ret;
+
+ itr1 |= (TS1_HITTHD_MASK & (th << TS1_HITTHD_POS));
+ } else {
+ sensor->low_temp_enabled = 0;
+ }
+
+ /* Disable high-temp if "high" is too big. */
+ if (high < INT_MAX) {
+ sensor->high_temp_enabled = 1;
+ ret = stm_thermal_calculate_threshold(sensor, high, &th);
+ if (ret)
+ return ret;
+
+ itr1 |= (TS1_LITTHD_MASK & (th << TS1_LITTHD_POS));
+ } else {
+ sensor->high_temp_enabled = 0;
+ }
+
+ /* Write new threshod values*/
+ writel_relaxed(itr1, sensor->base + DTS_ITR1_OFFSET);
+
+ return 0;
+}
+
+/* Callback to get temperature from HW */
+static int stm_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+ struct stm_thermal_sensor *sensor = tz->devdata;
+ u32 periods;
+ int freqM, ret;
+
+ if (sensor->mode != THERMAL_DEVICE_ENABLED)
+ return -EAGAIN;
+
+ /* Retrieve the number of periods sampled */
+ ret = readl_relaxed_poll_timeout(sensor->base + DTS_DR_OFFSET, periods,
+ (periods & TS1_MFREQ_MASK),
+ STARTUP_TIME, POLL_TIMEOUT);
+ if (ret)
+ return ret;
+
+ /* Figure out the CLK_PTAT frequency */
+ freqM = (clk_get_rate(sensor->clk) * SAMPLING_TIME) / periods;
+ if (!freqM)
+ return -EINVAL;
+
+ /* Figure out the temperature in mili celsius */
+ *temp = (freqM - sensor->fmt0) * 1000 / sensor->ramp_coeff + sensor->t0;
+
+ return 0;
+}
+
+/* Registers DTS irq to be visible by GIC */
+static int stm_register_irq(struct stm_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)
+ return sensor->irq;
+
+ ret = devm_request_threaded_irq(dev, sensor->irq,
+ NULL,
+ stm_thermal_irq_handler,
+ IRQF_ONESHOT,
+ dev->driver->name, sensor);
+ if (ret) {
+ dev_err(dev, "%s: Failed to register IRQ %d\n", __func__,
+ sensor->irq);
+ return ret;
+ }
+
+ dev_dbg(dev, "%s: thermal IRQ registered", __func__);
+
+ return 0;
+}
+
+static int stm_thermal_sensor_off(struct stm_thermal_sensor *sensor)
+{
+ int ret;
+
+ stm_disable_irq(sensor);
+
+ ret = stm_sensor_power_off(sensor);
+ if (ret)
+ return ret;
+
+ clk_disable_unprepare(sensor->clk);
+
+ return 0;
+}
+
+static int stm_thermal_prepare(struct stm_thermal_sensor *sensor)
+{
+ int ret;
+
+ ret = clk_prepare_enable(sensor->clk);
+ if (ret)
+ return ret;
+
+ ret = stm_thermal_read_factory_settings(sensor);
+ if (ret)
+ goto thermal_unprepare;
+
+ ret = stm_thermal_calibration(sensor);
+ if (ret)
+ goto thermal_unprepare;
+
+ return 0;
+
+thermal_unprepare:
+ clk_disable_unprepare(sensor->clk);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stm_thermal_suspend(struct device *dev)
+{
+ struct stm_thermal_sensor *sensor = dev_get_drvdata(dev);
+
+ return stm_thermal_sensor_off(sensor);
+}
+
+static int stm_thermal_resume(struct device *dev)
+{
+ int ret;
+ struct stm_thermal_sensor *sensor = dev_get_drvdata(dev);
+
+ ret = stm_thermal_prepare(sensor);
+ if (ret)
+ return ret;
+
+ ret = stm_sensor_power_on(sensor);
+ if (ret)
+ return ret;
+
+ thermal_zone_device_update(sensor->th_dev, THERMAL_EVENT_UNSPECIFIED);
+ stm_enable_irq(sensor);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(stm_thermal_pm_ops,
+ stm_thermal_suspend, stm_thermal_resume);
+
+static const struct thermal_zone_device_ops stm_tz_ops = {
+ .get_temp = stm_thermal_get_temp,
+ .set_trips = stm_thermal_set_trips,
+};
+
+static const struct of_device_id stm_thermal_of_match[] = {
+ { .compatible = "st,stm32-thermal"},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, stm_thermal_of_match);
+
+static int stm_thermal_probe(struct platform_device *pdev)
+{
+ struct stm_thermal_sensor *sensor;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+
+ if (!pdev->dev.of_node) {
+ dev_err(&pdev->dev, "%s: device tree node not found\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, sensor);
+
+ sensor->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ /* Populate sensor */
+ sensor->base = base;
+
+ sensor->clk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(sensor->clk)) {
+ dev_err(&pdev->dev, "%s: failed to fetch PCLK clock\n",
+ __func__);
+ return PTR_ERR(sensor->clk);
+ }
+
+ stm_disable_irq(sensor);
+
+ /* Clear irq flags */
+ writel_relaxed(ICIFR_MASK, sensor->base + DTS_ICIFR_OFFSET);
+
+ /* Configure and enable HW sensor */
+ ret = stm_thermal_prepare(sensor);
+ if (ret) {
+ dev_err(&pdev->dev, "Error prepare sensor: %d\n", ret);
+ return ret;
+ }
+
+ ret = stm_sensor_power_on(sensor);
+ if (ret) {
+ dev_err(&pdev->dev, "Error power on sensor: %d\n", ret);
+ return ret;
+ }
+
+ sensor->th_dev = devm_thermal_of_zone_register(&pdev->dev, 0,
+ sensor,
+ &stm_tz_ops);
+
+ if (IS_ERR(sensor->th_dev)) {
+ dev_err(&pdev->dev, "%s: thermal zone sensor registering KO\n",
+ __func__);
+ ret = PTR_ERR(sensor->th_dev);
+ return ret;
+ }
+
+ /* Register IRQ into GIC */
+ ret = stm_register_irq(sensor);
+ if (ret)
+ goto err_tz;
+
+ stm_enable_irq(sensor);
+
+ /*
+ * Thermal_zone doesn't enable hwmon as default,
+ * enable it here
+ */
+ sensor->th_dev->tzp->no_hwmon = false;
+ ret = thermal_add_hwmon_sysfs(sensor->th_dev);
+ if (ret)
+ goto err_tz;
+
+ dev_info(&pdev->dev, "%s: Driver initialized successfully\n",
+ __func__);
+
+ return 0;
+
+err_tz:
+ return ret;
+}
+
+static int stm_thermal_remove(struct platform_device *pdev)
+{
+ struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+ stm_thermal_sensor_off(sensor);
+ thermal_remove_hwmon_sysfs(sensor->th_dev);
+
+ return 0;
+}
+
+static struct platform_driver stm_thermal_driver = {
+ .driver = {
+ .name = "stm_thermal",
+ .pm = &stm_thermal_pm_ops,
+ .of_match_table = stm_thermal_of_match,
+ },
+ .probe = stm_thermal_probe,
+ .remove = stm_thermal_remove,
+};
+module_platform_driver(stm_thermal_driver);
+
+MODULE_DESCRIPTION("STMicroelectronics STM32 Thermal Sensor Driver");
+MODULE_AUTHOR("David Hernandez Sanchez <david.hernandezsanchez@st.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:stm_thermal");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 04:02:27 +0000