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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2020-06-23 00:13:09 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2020-06-23 00:35:53 +0300 |
| commit | 3727ff90edf6bb93025129f804bd2c97d8d161fa (patch) | |
| tree | 4dd7e0f711d95595ca0bf2f9d302667b36434017 | |
| parent | fc2bb6c726df02973748d1aa46cb22622287bc79 (diff) | |
iio: adc: qcom-vadc-common: use fixp_linear_interpolate
Use new function fixp_linear_interpolate() instead of hand-coding the
linar interpolation.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
| -rw-r--r-- | drivers/iio/adc/qcom-vadc-common.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c index ffa578ce76db..aab1ef1c8da4 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> @@ -167,10 +168,8 @@ 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; |