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iio: gts-helper: export iio_gts_get_total_gain()

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Export this function in preparation for the fix in veml6030.c, where the
total gain can be used to ease the calculation of the processed value of
the IIO_LIGHT channel compared to acquiring the scale in NANO.

Suggested-by: Matti Vaittinen <mazziesaccount@gmail.com>
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://patch.msgid.link/20250127-veml6030-scale-v3-1-4f32ba03df94@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco 2025-01-27 20:30:22 +01:00 committed by Jonathan Cameron
parent ec08c39546
commit dbd2e08ff0
2 changed files with 11 additions and 1 deletions
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11
drivers/iio/industrialio-gts-helper.c
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@ -1026,7 +1026,15 @@ int iio_gts_find_gain_time_sel_for_scale(struct iio_gts *gts, int scale_int,
}
EXPORT_SYMBOL_NS_GPL(iio_gts_find_gain_time_sel_for_scale, "IIO_GTS_HELPER");
static int iio_gts_get_total_gain(struct iio_gts *gts, int gain, int time)
/**
* iio_gts_get_total_gain - Fetch total gain for given HW-gain and time
* @gts: Gain time scale descriptor
* @gain: HW-gain for which the total gain is searched for
* @time: Integration time for which the total gain is searched for
*
* Return: total gain on success and -EINVAL on error.
*/
int iio_gts_get_total_gain(struct iio_gts *gts, int gain, int time)
{
const struct iio_itime_sel_mul *itime;
@ -1042,6 +1050,7 @@ static int iio_gts_get_total_gain(struct iio_gts *gts, int gain, int time)
return gain * itime->mul;
}
EXPORT_SYMBOL_NS_GPL(iio_gts_get_total_gain, "IIO_GTS_HELPER");
static int iio_gts_get_scale_linear(struct iio_gts *gts, int gain, int time,
u64 *scale)

1
include/linux/iio/iio-gts-helper.h
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@ -208,5 +208,6 @@ int iio_gts_all_avail_scales(struct iio_gts *gts, const int **vals, int *type,
int *length);
int iio_gts_avail_scales_for_time(struct iio_gts *gts, int time,
const int **vals, int *type, int *length);
int iio_gts_get_total_gain(struct iio_gts *gts, int gain, int time);
#endif