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

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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: Slawomir Stepien <slawomir.stepien@nokia.com>
Link: https://lore.kernel.org/r/20220607063504.1287855-3-sst@poczta.fm
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Slawomir Stepien 2022-06-07 08:35:04 +02:00 committed by Guenter Roeck
parent 07845f559d
commit 00dc6452be
1 changed files with 16 additions and 0 deletions
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16
drivers/hwmon/lm90.c
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@ -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;
}