On 18-09-2013 07:06, Guenter Roeck wrote:
> On Tue, Sep 17, 2013 at 06:34:05PM -0400, Eduardo Valentin wrote:
>> 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.
>>
>> Cc: Jean Delvare <khali@xxxxxxxxxxxx>
>> Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
>> Cc: lm-sensors@xxxxxxxxxxxxxx
>> Cc: linux-kernel@xxxxxxxxxxxxxxx
>> Signed-off-by: Eduardo Valentin <eduardo.valentin@xxxxxx>
>> ---
>> drivers/hwmon/tmp102.c | 20 ++++++++++++++++++++
>> 1 file changed, 20 insertions(+)
>>
>> ---
>>
>> Guenter,
>>
>> Here is a version without the warnings, as requested.
>>
>> Eduardo
>>
>> diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c
>> index d7b47ab..dc96598 100644
>> --- a/drivers/hwmon/tmp102.c
>> +++ b/drivers/hwmon/tmp102.c
>> @@ -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 +238,8 @@ static int tmp102_remove(struct i2c_client *client)
>> {
>> struct tmp102 *tmp102 = i2c_get_clientdata(client);
>>
>> + /* thermal zone life cycle is not our responsibility */
>
> This comment does not provide any value. Please drop it from both drivers.
> Sorry I missed that earlier.
Yeah, I even forgot to drop it myself. No problem, I am resending both
without it.
>
>> + thermal_zone_of_sensor_unregister(&client->dev, tmp102->tz);
>> hwmon_device_unregister(tmp102->hwmon_dev);
>> sysfs_remove_group(&client->dev.kobj, &tmp102_attr_group);
>>
>> --
>> 1.8.2.1.342.gfa7285d
>>
>>
>
>
--
You have got to be excited about what you are doing. (L. Lamport)
Eduardo Valentin
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