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authorCrt Mori <cmo@melexis.com>2020-09-06 23:02:31 +0200
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2020-09-13 10:21:37 +0100
commitdde8ceec9e29fe2abf4fabee7d5a0445d0b75b66 (patch)
tree3ec43016cbf6020f42835f486a386ec2cdba87c3 /drivers/iio/temperature
parentd3333e21f2d76fa384200a0826d766285787493f (diff)
downloadlinux-dde8ceec9e29fe2abf4fabee7d5a0445d0b75b66.tar.bz2
iio: temperature: mlx90632: Interface to change object ambient temperature
Since object temperature might be different than the sensor temperature the infrared sensors should provide an interface to inject ambient temperature. This was in past done via write to ambient temperature interface (in_temp_ambient_raw), but I think most people did not know about it. This solution introduces a new iio type of the CALIBAMBIENT which is hopefully more descriptive and more explicit about the purpose and capabilities of the sensors. Signed-off-by: Crt Mori <cmo@melexis.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20200906210231.383976-1-cmo@melexis.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/temperature')
-rw-r--r--drivers/iio/temperature/mlx90632.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index 472a7fb20615..503fe54a0bb9 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -761,7 +761,9 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
*val2 = data->emissivity * 1000;
}
return IIO_VAL_INT_PLUS_MICRO;
-
+ case IIO_CHAN_INFO_CALIBAMBIENT:
+ *val = data->object_ambient_temperature;
+ return IIO_VAL_INT;
default:
return -EINVAL;
}
@@ -781,6 +783,9 @@ static int mlx90632_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
data->emissivity = val * 1000 + val2 / 1000;
return 0;
+ case IIO_CHAN_INFO_CALIBAMBIENT:
+ data->object_ambient_temperature = val;
+ return 0;
default:
return -EINVAL;
}
@@ -798,7 +803,7 @@ static const struct iio_chan_spec mlx90632_channels[] = {
.modified = 1,
.channel2 = IIO_MOD_TEMP_OBJECT,
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
- BIT(IIO_CHAN_INFO_CALIBEMISSIVITY),
+ BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
},
};