Merge tag 'thermal-v5.17-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux

Pull thermal control material for 5.17-rc1 from Daniel Lezcano:

 - Fix PM issue on the iMX driver when suspend/resume is happening by
   implementing PM runtime support (Oleksij Rempel)

 - Add 'const' annotation to the thermal_cooling_ops in the Intel
   powerclamp driver (Rikard Falkeborn)

 - Add TSU driver and bindings for the RZ/G2L platform (Biju Das)

 - Fix missing ADC bit set on iMX8MP to enable the sensor (Paul Gerber)

 - Fix missing check when calling reset_control_deassert() (Biju Das)

* tag 'thermal-v5.17-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
  thermal/drivers/rz2gl: Add error check for reset_control_deassert()
  thermal/drivers/imx8mm: Enable ADC when enabling monitor
  thermal/drivers: Add TSU driver for RZ/G2L
  dt-bindings: thermal: Document Renesas RZ/G2L TSU
  thermal/drivers/intel_powerclamp: Constify static thermal_cooling_device_ops
  thermal/drivers/imx: Implement runtime PM support

Author: rafaeljw

Documentation/devicetree/bindings/thermal/rzg2l-thermal.yaml

@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/rzg2l-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G2L Thermal Sensor Unit
+
+description:
+  On RZ/G2L SoCs, the thermal sensor unit (TSU) measures the
+  temperature(Tj) inside the LSI.
+
+maintainers:
+  - Biju Das <biju.das.jz@bp.renesas.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a07g044-tsu # RZ/G2{L,LC}
+      - const: renesas,rzg2l-tsu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - resets
+  - "#thermal-sensor-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a07g044-cpg.h>
+
+    tsu: thermal@10059400 {
+            compatible = "renesas,r9a07g044-tsu",
+                         "renesas,rzg2l-tsu";
+            reg = <0x10059400 0x400>;
+            clocks = <&cpg CPG_MOD R9A07G044_TSU_PCLK>;
+            resets = <&cpg R9A07G044_TSU_PRESETN>;
+            power-domains = <&cpg>;
+            #thermal-sensor-cells = <1>;
+    };
+
+    thermal-zones {
+            cpu-thermal {
+                    polling-delay-passive = <250>;
+                    polling-delay = <1000>;
+                    thermal-sensors = <&tsu 0>;
+
+                    trips {
+                            sensor_crit: sensor-crit {
+                                    temperature = <125000>;
+                                    hysteresis = <1000>;
+                                    type = "critical";
+                            };
+                    };
+            };
+    };

drivers/thermal/Kconfig

@@ -354,6 +354,15 @@ config RCAR_GEN3_THERMAL
 	  Enable this to plug the R-Car Gen3 or RZ/G2 thermal sensor driver into
 	  the Linux thermal framework.
 
+config RZG2L_THERMAL
+	tristate "Renesas RZ/G2L thermal driver"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	depends on HAS_IOMEM
+	depends on OF
+	help
+	  Enable this to plug the RZ/G2L thermal sensor driver into the Linux
+	  thermal framework.
+
 config KIRKWOOD_THERMAL
 	tristate "Temperature sensor on Marvell Kirkwood SoCs"
 	depends on MACH_KIRKWOOD || COMPILE_TEST

drivers/thermal/Makefile

@@ -37,6 +37,7 @@ obj-$(CONFIG_SUN8I_THERMAL)     += sun8i_thermal.o
 obj-$(CONFIG_ROCKCHIP_THERMAL)	+= rockchip_thermal.o
 obj-$(CONFIG_RCAR_THERMAL)	+= rcar_thermal.o
 obj-$(CONFIG_RCAR_GEN3_THERMAL)	+= rcar_gen3_thermal.o
+obj-$(CONFIG_RZG2L_THERMAL)	+= rzg2l_thermal.o
 obj-$(CONFIG_KIRKWOOD_THERMAL)  += kirkwood_thermal.o
 obj-y				+= samsung/
 obj-$(CONFIG_DOVE_THERMAL)  	+= dove_thermal.o

drivers/thermal/imx8mm_thermal.c

@@ -21,6 +21,7 @@
 #define TPS			0x4
 #define TRITSR			0x20	/* TMU immediate temp */
 
+#define TER_ADC_PD		BIT(30)
 #define TER_EN			BIT(31)
 #define TRITSR_TEMP0_VAL_MASK	0xff
 #define TRITSR_TEMP1_VAL_MASK	0xff0000
@@ -113,6 +114,8 @@ static void imx8mm_tmu_enable(struct imx8mm_tmu *tmu, bool enable)
 
 	val = readl_relaxed(tmu->base + TER);
 	val = enable ? (val | TER_EN) : (val & ~TER_EN);
+	if (tmu->socdata->version == TMU_VER2)
+		val = enable ? (val & ~TER_ADC_PD) : (val | TER_ADC_PD);
 	writel_relaxed(val, tmu->base + TER);
 }
 

drivers/thermal/imx_thermal.c

@@ -15,6 +15,7 @@
 #include <linux/regmap.h>
 #include <linux/thermal.h>
 #include <linux/nvmem-consumer.h>
+#include <linux/pm_runtime.h>
 
 #define REG_SET		0x4
 #define REG_CLR		0x8
@@ -194,6 +195,7 @@ static struct thermal_soc_data thermal_imx7d_data = {
 };
 
 struct imx_thermal_data {
+	struct device *dev;
 	struct cpufreq_policy *policy;
 	struct thermal_zone_device *tz;
 	struct thermal_cooling_device *cdev;
@@ -252,44 +254,15 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 	const struct thermal_soc_data *soc_data = data->socdata;
 	struct regmap *map = data->tempmon;
 	unsigned int n_meas;
-	bool wait, run_measurement;
 	u32 val;
+	int ret;
 
-	run_measurement = !data->irq_enabled;
-	if (!run_measurement) {
-		/* Check if a measurement is currently in progress */
-		regmap_read(map, soc_data->temp_data, &val);
-		wait = !(val & soc_data->temp_valid_mask);
-	} else {
-		/*
-		 * Every time we measure the temperature, we will power on the
-		 * temperature sensor, enable measurements, take a reading,
-		 * disable measurements, power off the temperature sensor.
-		 */
-		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
-			    soc_data->power_down_mask);
-		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
-			    soc_data->measure_temp_mask);
-
-		wait = true;
-	}
-
-	/*
-	 * According to the temp sensor designers, it may require up to ~17us
-	 * to complete a measurement.
-	 */
-	if (wait)
-		usleep_range(20, 50);
+	ret = pm_runtime_resume_and_get(data->dev);
+	if (ret < 0)
+		return ret;
 
 	regmap_read(map, soc_data->temp_data, &val);
 
-	if (run_measurement) {
-		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
-			     soc_data->measure_temp_mask);
-		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
-			     soc_data->power_down_mask);
-	}
-
 	if ((val & soc_data->temp_valid_mask) == 0) {
 		dev_dbg(&tz->device, "temp measurement never finished\n");
 		return -EAGAIN;
@@ -328,31 +301,25 @@ static int imx_get_temp(struct thermal_zone_device *tz, int *temp)
 		enable_irq(data->irq);
 	}
 
+	pm_runtime_put(data->dev);
+
 	return 0;
 }
 
 static int imx_change_mode(struct thermal_zone_device *tz,
 			   enum thermal_device_mode mode)
 {
 	struct imx_thermal_data *data = tz->devdata;
-	struct regmap *map = data->tempmon;
-	const struct thermal_soc_data *soc_data = data->socdata;
 
 	if (mode == THERMAL_DEVICE_ENABLED) {
-		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
-			     soc_data->power_down_mask);
-		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
-			     soc_data->measure_temp_mask);
+		pm_runtime_get(data->dev);
 
 		if (!data->irq_enabled) {
 			data->irq_enabled = true;
 			enable_irq(data->irq);
 		}
 	} else {
-		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
-			     soc_data->measure_temp_mask);
-		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
-			     soc_data->power_down_mask);
+		pm_runtime_put(data->dev);
 
 		if (data->irq_enabled) {
 			disable_irq(data->irq);
@@ -393,6 +360,11 @@ static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip,
 			     int temp)
 {
 	struct imx_thermal_data *data = tz->devdata;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(data->dev);
+	if (ret < 0)
+		return ret;
 
 	/* do not allow changing critical threshold */
 	if (trip == IMX_TRIP_CRITICAL)
@@ -406,6 +378,8 @@ static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip,
 
 	imx_set_alarm_temp(data, temp);
 
+	pm_runtime_put(data->dev);
+
 	return 0;
 }
 
@@ -681,6 +655,8 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
+	data->dev = &pdev->dev;
+
 	map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon");
 	if (IS_ERR(map)) {
 		ret = PTR_ERR(map);
@@ -800,6 +776,16 @@ static int imx_thermal_probe(struct platform_device *pdev)
 		     data->socdata->power_down_mask);
 	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
 		     data->socdata->measure_temp_mask);
+	/* After power up, we need a delay before first access can be done. */
+	usleep_range(20, 50);
+
+	/* the core was configured and enabled just before */
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(data->dev);
+
+	ret = pm_runtime_resume_and_get(data->dev);
+	if (ret < 0)
+		goto disable_runtime_pm;
 
 	data->irq_enabled = true;
 	ret = thermal_zone_device_enable(data->tz);
@@ -814,10 +800,15 @@ static int imx_thermal_probe(struct platform_device *pdev)
 		goto thermal_zone_unregister;
 	}
 
+	pm_runtime_put(data->dev);
+
 	return 0;
 
 thermal_zone_unregister:
 	thermal_zone_device_unregister(data->tz);
+disable_runtime_pm:
+	pm_runtime_put_noidle(data->dev);
+	pm_runtime_disable(data->dev);
 clk_disable:
 	clk_disable_unprepare(data->thermal_clk);
 legacy_cleanup:
@@ -829,13 +820,9 @@ static int imx_thermal_probe(struct platform_device *pdev)
 static int imx_thermal_remove(struct platform_device *pdev)
 {
 	struct imx_thermal_data *data = platform_get_drvdata(pdev);
-	struct regmap *map = data->tempmon;
 
-	/* Disable measurements */
-	regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
-		     data->socdata->power_down_mask);
-	if (!IS_ERR(data->thermal_clk))
-		clk_disable_unprepare(data->thermal_clk);
+	pm_runtime_put_noidle(data->dev);
+	pm_runtime_disable(data->dev);
 
 	thermal_zone_device_unregister(data->tz);
 	imx_thermal_unregister_legacy_cooling(data);
@@ -858,29 +845,79 @@ static int __maybe_unused imx_thermal_suspend(struct device *dev)
 	ret = thermal_zone_device_disable(data->tz);
 	if (ret)
 		return ret;
+
+	return pm_runtime_force_suspend(data->dev);
+}
+
+static int __maybe_unused imx_thermal_resume(struct device *dev)
+{
+	struct imx_thermal_data *data = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pm_runtime_force_resume(data->dev);
+	if (ret)
+		return ret;
+	/* Enabled thermal sensor after resume */
+	return thermal_zone_device_enable(data->tz);
+}
+
+static int __maybe_unused imx_thermal_runtime_suspend(struct device *dev)
+{
+	struct imx_thermal_data *data = dev_get_drvdata(dev);
+	const struct thermal_soc_data *socdata = data->socdata;
+	struct regmap *map = data->tempmon;
+	int ret;
+
+	ret = regmap_write(map, socdata->sensor_ctrl + REG_CLR,
+			   socdata->measure_temp_mask);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(map, socdata->sensor_ctrl + REG_SET,
+			   socdata->power_down_mask);
+	if (ret)
+		return ret;
+
 	clk_disable_unprepare(data->thermal_clk);
 
 	return 0;
 }
 
-static int __maybe_unused imx_thermal_resume(struct device *dev)
+static int __maybe_unused imx_thermal_runtime_resume(struct device *dev)
 {
 	struct imx_thermal_data *data = dev_get_drvdata(dev);
+	const struct thermal_soc_data *socdata = data->socdata;
+	struct regmap *map = data->tempmon;
 	int ret;
 
 	ret = clk_prepare_enable(data->thermal_clk);
 	if (ret)
 		return ret;
-	/* Enabled thermal sensor after resume */
-	ret = thermal_zone_device_enable(data->tz);
+
+	ret = regmap_write(map, socdata->sensor_ctrl + REG_CLR,
+			   socdata->power_down_mask);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(map, socdata->sensor_ctrl + REG_SET,
+			   socdata->measure_temp_mask);
 	if (ret)
 		return ret;
 
+	/*
+	 * According to the temp sensor designers, it may require up to ~17us
+	 * to complete a measurement.
+	 */
+	usleep_range(20, 50);
+
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops,
-			 imx_thermal_suspend, imx_thermal_resume);
+static const struct dev_pm_ops imx_thermal_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(imx_thermal_suspend, imx_thermal_resume)
+	SET_RUNTIME_PM_OPS(imx_thermal_runtime_suspend,
+			   imx_thermal_runtime_resume, NULL)
+};
 
 static struct platform_driver imx_thermal = {
 	.driver = {

drivers/thermal/intel/intel_powerclamp.c

@@ -641,7 +641,7 @@ static int powerclamp_set_cur_state(struct thermal_cooling_device *cdev,
 }
 
 /* bind to generic thermal layer as cooling device*/
-static struct thermal_cooling_device_ops powerclamp_cooling_ops = {
+static const struct thermal_cooling_device_ops powerclamp_cooling_ops = {
 	.get_max_state = powerclamp_get_max_state,
 	.get_cur_state = powerclamp_get_cur_state,
 	.set_cur_state = powerclamp_set_cur_state,