thermal_hwmon: Add devres wrapper for thermal_add_hwmon_sysfs()

Add devres wrapper for thermal_add_hwmon_sysfs() to simplify driver
code.

Signed-off-by: Andrey Smirnov <[e-mail]>
Reviewed-by: Daniel Lezcano <[e-mail]>
Tested-by: Lucas Stach <[e-mail]>
Cc: Chris Healy <[e-mail]>
Cc: Lucas Stach <[e-mail]>
Cc: Eduardo Valentin <[e-mail]>
Cc: Daniel Lezcano <[e-mail]>
Cc: Angus Ainslie (Purism) <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/thermal/thermal_hwmon.c

···
 	kfree(hwmon);
 }
 EXPORT_SYMBOL_GPL(thermal_remove_hwmon_sysfs);
+
+static void devm_thermal_hwmon_release(struct device *dev, void *res)
+{
+	thermal_remove_hwmon_sysfs(*(struct thermal_zone_device **)res);
+}
+
+int devm_thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+{
+	struct thermal_zone_device **ptr;
+	int ret;
+
+	ptr = devres_alloc(devm_thermal_hwmon_release, sizeof(*ptr),
+			   GFP_KERNEL);
+	if (!ptr)
+		return -ENOMEM;
+
+	ret = thermal_add_hwmon_sysfs(tz);
+	if (ret) {
+		devres_free(ptr);
+		return ret;
+	}
+
+	*ptr = tz;
+	devres_add(&tz->device, ptr);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devm_thermal_add_hwmon_sysfs);

drivers/thermal/thermal_hwmon.h

···
 
 #ifdef CONFIG_THERMAL_HWMON
 int thermal_add_hwmon_sysfs(struct thermal_zone_device *tz);
+int devm_thermal_add_hwmon_sysfs(struct thermal_zone_device *tz);
 void thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz);
 #else
 static inline int
 thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+{
+	return 0;
+}
+
+static inline int
+devm_thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
 {
 	return 0;
 }