From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Herring <robh+dt@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amitk@kernel.org>,
Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org,
devicetree@vger.kernel.org, linux-iio@vger.kernel.org
Subject: [PATCH v2 4/9] iio: adc: qcom-vadc-common: use fixp_linear_interpolate
Date: Thu, 3 Sep 2020 16:21:04 +0300 [thread overview]
Message-ID: <20200903132109.1914011-5-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20200903132109.1914011-1-dmitry.baryshkov@linaro.org>
Use new function fixp_linear_interpolate() instead of hand-coding the
linar interpolation.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
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
next prev parent reply other threads:[~2020-09-03 15:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 13:21 [PATCH v2 0/0] qcom: pm8150: add support for thermal monitoring Dmitry Baryshkov
2020-09-03 13:21 ` [PATCH v2 1/9] dt-bindings: thermal: qcom: add adc-thermal monitor bindings Dmitry Baryshkov
2020-09-03 16:34 ` Rob Herring
2020-09-06 14:14 ` Jonathan Cameron
2020-09-03 13:21 ` [PATCH v2 2/9] fixp-arith: add a linear interpolation function Dmitry Baryshkov
2020-09-03 13:21 ` [PATCH v2 3/9] iio: adc: qcom-vadc: move several adc5 functions to common file Dmitry Baryshkov
2020-09-06 14:18 ` Jonathan Cameron
2020-09-03 13:21 ` Dmitry Baryshkov [this message]
2020-09-03 19:38 ` [PATCH v2 4/9] iio: adc: qcom-vadc-common: use fixp_linear_interpolate Andy Shevchenko
2020-09-06 14:23 ` Jonathan Cameron
2020-09-03 13:21 ` [PATCH v2 5/9] iio: adc: qcom-spmi-adc5: fix driver name Dmitry Baryshkov
2020-09-04 11:14 ` Manivannan Sadhasivam
2020-09-06 14:24 ` Jonathan Cameron
2020-09-03 13:21 ` [PATCH v2 6/9] iio: adc: qcom-spmi-adc5: use of_device_get_match_data Dmitry Baryshkov
2020-09-04 11:12 ` Manivannan Sadhasivam
2020-09-03 13:21 ` [PATCH v2 7/9] thermal: qcom: add support for adc-tm5 PMIC thermal monitor Dmitry Baryshkov
2020-09-06 14:45 ` Jonathan Cameron
2020-09-03 13:21 ` [PATCH v2 8/9] arm64: dts: qcom: pm8150x: add definitions for adc-tm5 part Dmitry Baryshkov
2020-09-03 13:21 ` [PATCH v2 9/9] arm64: dts: sm8250-mtp: add thermal zones using pmic's adc-tm5 Dmitry Baryshkov
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