More thermal control updates for 6.1-rc1

- Use platform data to get the sensor ID instead of parsing the device
    in imx_sc thermal driver and remove the dedicated OF function from
    the core code (Daniel Lezcano).
 
  - Fix Kconfig dependency for the QCom tsens thermal driver (Jonathan
    Cameron).
 
  - Add missing const annotation to the RCar ops thermal driver (Lad
    Prabhakar).
 
  - Drop duplicate parameter check from
    thermal_zone_device_register_with_trips() (Lad Prabhakar).
 
  - Fix NULL pointer dereference in trip_point_temp_store() by making it
    check if the ->set_trip_temp() operation is present (Lad Prabhakar).
 
  - Fix the MSM8939 fourth sensor hardware ID in the QCom tsens thermal
    driver (Vincent Knecht).
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Merge tag 'thermal-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more thermal control updates from Rafael Wysocki:
 "These fix assorted issues in the thermal core and ARM thermal drivers.

  Specifics:

   - Use platform data to get the sensor ID instead of parsing the
     device in imx_sc thermal driver and remove the dedicated OF
     function from the core code (Daniel Lezcano).

   - Fix Kconfig dependency for the QCom tsens thermal driver (Jonathan
     Cameron).

   - Add missing const annotation to the RCar ops thermal driver (Lad
     Prabhakar).

   - Drop duplicate parameter check from
     thermal_zone_device_register_with_trips() (Lad Prabhakar).

   - Fix NULL pointer dereference in trip_point_temp_store() by making
     it check if the ->set_trip_temp() operation is present (Lad
     Prabhakar).

   - Fix the MSM8939 fourth sensor hardware ID in the QCom tsens thermal
     driver (Vincent Knecht)"

* tag 'thermal-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal/drivers/qcom/tsens-v0_1: Fix MSM8939 fourth sensor hw_id
  thermal/core: Add a check before calling set_trip_temp()
  thermal/core: Drop valid pointer check for type
  thermal/drivers/rcar_thermal: Constify static thermal_zone_device_ops
  thermal/drivers/qcom: Drop false build dependency of all QCOM drivers on QCOM_TSENS
  thermal/of: Remove the thermal_zone_of_get_sensor_id() function
  thermal/drivers/imx_sc: Rely on the platform data to get the resource id

drivers/thermal/Makefile

@@ -52,7 +52,7 @@ obj-$(CONFIG_DA9062_THERMAL)	+= da9062-thermal.o
 obj-y				+= intel/
 obj-$(CONFIG_TI_SOC_THERMAL)	+= ti-soc-thermal/
 obj-y				+= st/
-obj-$(CONFIG_QCOM_TSENS)	+= qcom/
+obj-y				+= qcom/
 obj-y				+= tegra/
 obj-$(CONFIG_HISI_THERMAL)     += hisi_thermal.o
 obj-$(CONFIG_MTK_THERMAL)	+= mtk_thermal.o

drivers/thermal/imx_sc_thermal.c

@@ -76,59 +76,55 @@ static const struct thermal_zone_device_ops imx_sc_thermal_ops = {
 
 static int imx_sc_thermal_probe(struct platform_device *pdev)
 {
-	struct device_node *np, *child, *sensor_np;
 	struct imx_sc_sensor *sensor;
-	int ret;
+	const int *resource_id;
+	int i, ret;
 
 	ret = imx_scu_get_handle(&thermal_ipc_handle);
 	if (ret)
 		return ret;
 
-	np = of_find_node_by_name(NULL, "thermal-zones");
+	resource_id = of_device_get_match_data(&pdev->dev);
-	if (!np)
+	if (!resource_id)
-		return -ENODEV;
+		return -EINVAL;
 
-	sensor_np = of_node_get(pdev->dev.of_node);
+	for (i = 0; resource_id[i] > 0; i++) {
 
-	for_each_available_child_of_node(np, child) {
 		sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
-		if (!sensor) {
+		if (!sensor)
-			of_node_put(child);
+			return -ENOMEM;
-			ret = -ENOMEM;
-			goto put_node;
-		}
 
-		ret = thermal_zone_of_get_sensor_id(child,
+		sensor->resource_id = resource_id[i];
-						    sensor_np,
-						    &sensor->resource_id);
-		if (ret < 0) {
-			dev_err(&pdev->dev,
-				"failed to get valid sensor resource id: %d\n",
-				ret);
-			of_node_put(child);
-			break;
-		}
 
-		sensor->tzd = devm_thermal_of_zone_register(&pdev->dev,
+		sensor->tzd = devm_thermal_of_zone_register(&pdev->dev, sensor->resource_id,
-							    sensor->resource_id,
+							    sensor, &imx_sc_thermal_ops);
-							    sensor,
-							    &imx_sc_thermal_ops);
 		if (IS_ERR(sensor->tzd)) {
-			dev_err(&pdev->dev, "failed to register thermal zone\n");
+			/*
+			 * Save the error value before freeing the
+			 * sensor pointer, otherwise we endup with a
+			 * use-after-free error
+			 */
 			ret = PTR_ERR(sensor->tzd);
-			of_node_put(child);
+
-			break;
+			devm_kfree(&pdev->dev, sensor);
+
+			/*
+			 * The thermal framework notifies us there is
+			 * no thermal zone description for such a
+			 * sensor id
+			 */
+			if (ret == -ENODEV)
+				continue;
+
+			dev_err(&pdev->dev, "failed to register thermal zone\n");
+			return ret;
 		}
 
 		if (devm_thermal_add_hwmon_sysfs(sensor->tzd))
 			dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
 	}
 
-put_node:
+	return 0;
-	of_node_put(sensor_np);
-	of_node_put(np);
-
-	return ret;
 }
 
 static int imx_sc_thermal_remove(struct platform_device *pdev)
@@ -136,8 +132,10 @@ static int imx_sc_thermal_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int imx_sc_sensors[] = { IMX_SC_R_SYSTEM, IMX_SC_R_PMIC_0, -1 };
+
 static const struct of_device_id imx_sc_thermal_table[] = {
-	{ .compatible = "fsl,imx-sc-thermal", },
+	{ .compatible = "fsl,imx-sc-thermal", .data =  imx_sc_sensors },
 	{}
 };
 MODULE_DEVICE_TABLE(of, imx_sc_thermal_table);

drivers/thermal/qcom/tsens-v0_1.c

@@ -604,7 +604,7 @@ static const struct tsens_ops ops_8939 = {
 struct tsens_plat_data data_8939 = {
 	.num_sensors	= 10,
 	.ops		= &ops_8939,
-	.hw_ids		= (unsigned int []){ 0, 1, 2, 4, 5, 6, 7, 8, 9, 10 },
+	.hw_ids		= (unsigned int []){ 0, 1, 2, 3, 5, 6, 7, 8, 9, 10 },
 
 	.feat		= &tsens_v0_1_feat,
 	.fields	= tsens_v0_1_regfields,

drivers/thermal/rcar_thermal.c

@@ -316,7 +316,7 @@ static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone,
 	return 0;
 }
 
-static struct thermal_zone_device_ops rcar_thermal_zone_of_ops = {
+static const struct thermal_zone_device_ops rcar_thermal_zone_of_ops = {
 	.get_temp	= rcar_thermal_get_temp,
 };
 

drivers/thermal/thermal_core.c

@@ -1186,7 +1186,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
 		return ERR_PTR(-EINVAL);
 	}
 
-	if (type && strlen(type) >= THERMAL_NAME_LENGTH) {
+	if (strlen(type) >= THERMAL_NAME_LENGTH) {
 		pr_err("Thermal zone name (%s) too long, should be under %d chars\n",
 		       type, THERMAL_NAME_LENGTH);
 		return ERR_PTR(-EINVAL);

drivers/thermal/thermal_of.c

@@ -130,50 +130,6 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
 	return -EINVAL;
 }
 
-/**
- * thermal_zone_of_get_sensor_id - get sensor ID from a DT thermal zone
- * @tz_np: a valid thermal zone device node.
- * @sensor_np: a sensor node of a valid sensor device.
- * @id: the sensor ID returned if success.
- *
- * This function will get sensor ID from a given thermal zone node and
- * the sensor node must match the temperature provider @sensor_np.
- *
- * Return: 0 on success, proper error code otherwise.
- */
-
-int thermal_zone_of_get_sensor_id(struct device_node *tz_np,
-				  struct device_node *sensor_np,
-				  u32 *id)
-{
-	struct of_phandle_args sensor_specs;
-	int ret;
-
-	ret = of_parse_phandle_with_args(tz_np,
-					 "thermal-sensors",
-					 "#thermal-sensor-cells",
-					 0,
-					 &sensor_specs);
-	if (ret)
-		return ret;
-
-	if (sensor_specs.np != sensor_np) {
-		of_node_put(sensor_specs.np);
-		return -ENODEV;
-	}
-
-	if (sensor_specs.args_count > 1)
-		pr_warn("%pOFn: too many cells in sensor specifier %d\n",
-		     sensor_specs.np, sensor_specs.args_count);
-
-	*id = sensor_specs.args_count ? sensor_specs.args[0] : 0;
-
-	of_node_put(sensor_specs.np);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(thermal_zone_of_get_sensor_id);
-
 /***   functions parsing device tree nodes   ***/
 
 static int of_find_trip_id(struct device_node *np, struct device_node *trip)

drivers/thermal/thermal_sysfs.c

@@ -128,9 +128,11 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 	if (kstrtoint(buf, 10, &temperature))
 		return -EINVAL;
 
+	if (tz->ops->set_trip_temp) {
 		ret = tz->ops->set_trip_temp(tz, trip, temperature);
 		if (ret)
 			return ret;
+	}
 
 	if (tz->trips)
 		tz->trips[trip].temperature = temperature;

include/linux/thermal.h

@@ -308,9 +308,6 @@ void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_dev
 
 void thermal_of_zone_unregister(struct thermal_zone_device *tz);
 
-int thermal_zone_of_get_sensor_id(struct device_node *tz_np,
-				  struct device_node *sensor_np,
-				  u32 *id);
 #else
 static inline
 struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
@@ -334,13 +331,6 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev,
 						   struct thermal_zone_device *tz)
 {
 }
-
-static inline int thermal_zone_of_get_sensor_id(struct device_node *tz_np,
-						struct device_node *sensor_np,
-						u32 *id)
-{
-	return -ENOENT;
-}
 #endif
 
 #ifdef CONFIG_THERMAL