diff options
| author | Herve Codina <herve.codina@bootlin.com> | 2023-06-23 10:58:27 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-07-09 22:48:17 +0100 |
| commit | 7560418078b939e1e83f7dce502ec3c1ca8c152f (patch) | |
| tree | db12e5022c7571230dbf93f3d7d874a856742c8c /include/linux/iio | |
| parent | 4dc603735826ec3963e30d6f25260255ca96d103 (diff) | |
iio: inkern: Add a helper to query an available minimum raw value
A helper, iio_read_max_channel_raw() exists to read the available
maximum raw value of a channel but nothing similar exists to read the
available minimum raw value.
This new helper, iio_read_min_channel_raw(), fills the hole and can be
used for reading the available minimum raw value of a channel.
It is fully based on the existing iio_read_max_channel_raw().
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20230623085830.749991-11-herve.codina@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/iio')
| -rw-r--r-- | include/linux/iio/consumer.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index f536820b9cf2..e9910b41d48e 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -302,6 +302,18 @@ int iio_write_channel_raw(struct iio_channel *chan, int val); int iio_read_max_channel_raw(struct iio_channel *chan, int *val); /** + * iio_read_min_channel_raw() - read minimum available raw value from a given + * channel, i.e. the minimum possible value. + * @chan: The channel being queried. + * @val: Value read back. + * + * Note, if standard units are required, raw reads from iio channels + * need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. + */ +int iio_read_min_channel_raw(struct iio_channel *chan, int *val); + +/** * iio_read_avail_channel_raw() - read available raw values from a given channel * @chan: The channel being queried. * @vals: Available values read back. |