Commit 00dc6452 authored by Slawomir Stepien's avatar Slawomir Stepien Committed by Guenter Roeck
Browse files

hwmon: (lm90) Read the channel's temperature offset from device-tree 



Try to read the channel's temperature offset from device-tree. Having
offset in device-tree node is not mandatory. The offset can only be set
for remote channels.

Signed-off-by: default avatarSlawomir Stepien <slawomir.stepien@nokia.com>
Link: https://lore.kernel.org/r/20220607063504.1287855-3-sst@poczta.fm


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 07845f55

drivers/hwmon/lm90.c

+16 −0
Original line number Diff line number Diff line
@@ -2666,6 +2666,7 @@ static int lm90_probe_channel_from_dt(struct i2c_client *client, 
				      struct lm90_data *data)

{

	u32 id;

	s32 val;

	int err;

	struct device *dev = &client->dev;
@@ -2689,6 +2690,21 @@ static int lm90_probe_channel_from_dt(struct i2c_client *client, 
	if (data->channel_label[id])

		data->channel_config[id] |= HWMON_T_LABEL;



	err = of_property_read_s32(child, "temperature-offset-millicelsius", &val);

	if (!err) {

		if (id == 0) {

			dev_err(dev, "temperature-offset-millicelsius can't be set for internal channel\n");

			return -EINVAL;

		}



		err = lm90_set_temp_offset(data, lm90_temp_offset_index[id], id, val);

		if (err) {

			dev_err(dev, "can't set temperature offset %d for channel %d (%d)\n",

				val, id, err);

			return err;

		}

	}



	return 0;

}