hwmon: tmp102: expose to thermal fw via DT nodes (6a027523) · Commits · 戴 / test

This patch adds to tmp102 temperature sensor the possibility to expose itself as thermal zone device, registered on the thermal framework. The thermal zone is built only if a device tree node describing a thermal zone for this sensor is present inside the tmp102 DT node. Otherwise, the driver behavior will be the same. Note: This patch has also been reviewed by Jean D. He has requested to perform a wider inspection of possible users of thermal and hwmon interaction API. On the other hand, the change on this patch is acceptable on first step of overall code change. Cc: Jean Delvare <khali@linux-fr.org> Cc: lm-sensors@lm-sensors.org Cc: linux-kernel@vger.kernel.org Acked-by:

Guenter Roeck <linux@roeck-us.net> Signed-off-by:

Eduardo Valentin <eduardo.valentin@ti.com>

drivers/hwmon/tmp102.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,8 @@
		#include <linux/mutex.h>
		#include <linux/device.h>
		#include <linux/jiffies.h>
		#include <linux/thermal.h>
		#include <linux/of.h>

		#define DRIVER_NAME "tmp102"

		@@ -50,6 +52,7 @@

		struct tmp102 {
		struct device *hwmon_dev;
		struct thermal_zone_device *tz;
		struct mutex lock;
		u16 config_orig;
		unsigned long last_update;
		@@ -93,6 +96,15 @@ static struct tmp102 tmp102_update_device(struct i2c_client client)
		return tmp102;
		}

		static int tmp102_read_temp(void dev, long temp)
		{
		struct tmp102 *tmp102 = tmp102_update_device(to_i2c_client(dev));

		*temp = tmp102->temp[0];

		return 0;
		}

		static ssize_t tmp102_show_temp(struct device *dev,
		struct device_attribute *attr,
		char *buf)
		@@ -204,6 +216,12 @@ static int tmp102_probe(struct i2c_client *client,
		goto fail_remove_sysfs;
		}

		tmp102->tz = thermal_zone_of_sensor_register(&client->dev, 0,
		&client->dev,
		tmp102_read_temp, NULL);
		if (IS_ERR(tmp102->tz))
		tmp102->tz = NULL;

		dev_info(&client->dev, "initialized\n");

		return 0;
		@@ -220,6 +238,7 @@ static int tmp102_remove(struct i2c_client *client)
		{
		struct tmp102 *tmp102 = i2c_get_clientdata(client);

		thermal_zone_of_sensor_unregister(&client->dev, tmp102->tz);
		hwmon_device_unregister(tmp102->hwmon_dev);
		sysfs_remove_group(&client->dev.kobj, &tmp102_attr_group);

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