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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2020-12-04 05:54:58 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-01-16 18:19:00 +0000 |
| commit | e2621acd6d9af5b3d5584ddf0fd7994472d6199e (patch) | |
| tree | 079643c3c75c048ec75c4b6e83bf0de40be69292 /drivers/iio | |
| parent | c7ba98fc404305c6f27a8cca4d793cf668a7bfc7 (diff) | |
| download | linux-e2621acd6d9af5b3d5584ddf0fd7994472d6199e.tar.bz2 | |
iio: adc: qcom-vadc-common: use fixp_linear_interpolate
Use new function fixp_linear_interpolate() instead of hand-coding the
linear interpolation.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201204025509.1075506-5-dmitry.baryshkov@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/qcom-vadc-common.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c index d11f3343ad52..40d77b3af1bb 100644 --- a/drivers/iio/adc/qcom-vadc-common.c +++ b/drivers/iio/adc/qcom-vadc-common.c @@ -2,6 +2,7 @@ #include <linux/bug.h> #include <linux/kernel.h> #include <linux/bitops.h> +#include <linux/fixp-arith.h> #include <linux/math64.h> #include <linux/log2.h> #include <linux/err.h> @@ -368,10 +369,9 @@ static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts, } else { /* result is between search_index and search_index-1 */ /* interpolate linearly */ - *output = (((s32)((pts[i].y - pts[i - 1].y) * - (input - pts[i - 1].x)) / - (pts[i].x - pts[i - 1].x)) + - pts[i - 1].y); + *output = fixp_linear_interpolate(pts[i - 1].x, pts[i - 1].y, + pts[i].x, pts[i].y, + input); } return 0; |