[PATCH v5 4/9] iio: adc: qcom-vadc-common: use fixp_linear_interpolate
From: Dmitry Baryshkov <hidden>
Date: 2020-09-14 15:57:26
Also in:
linux-arm-msm, linux-iio, linux-pm
Subsystem:
arm/qualcomm mailing list, iio subsystem and drivers, the rest · Maintainers:
Jonathan Cameron, Linus Torvalds
Use new function fixp_linear_interpolate() instead of hand-coding the linear interpolation. Signed-off-by: Dmitry Baryshkov <redacted> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- drivers/iio/adc/qcom-vadc-common.c | 8 ++++---- 1 file 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;
--
2.28.0