Commit e2621acd authored by Dmitry Baryshkov's avatar Dmitry Baryshkov Committed by Jonathan Cameron
Browse files

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: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201204025509.1075506-5-dmitry.baryshkov@linaro.org


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent c7ba98fc

drivers/iio/adc/qcom-vadc-common.c

+4 −4
Original line number Diff line number Diff line
@@ -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;