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Message-ID: <20190812090341.27183-2-mircea.caprioru@analog.com>
Date: Mon, 12 Aug 2019 12:03:39 +0300
From: Mircea Caprioru <mircea.caprioru@...log.com>
To: <jic23@...nel.org>
CC: <Michael.Hennerich@...log.com>, <stefan.popa@...log.com>,
<lars@...afoo.de>, <gregkh@...uxfoundation.org>,
<linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>, <robh+dt@...nel.org>,
Mircea Caprioru <mircea.caprioru@...log.com>
Subject: [PATCH 2/4] iio: adc: ad_sigma_delta: Export ad_sd_calibrate
This patch exports the ad_sd_calibrate function in order to be able to
call it from outside ad_sigma_delta.
There are cases where the option to calibrate one channel at a time is
necessary (ex. system calibration for zero scale and full scale).
Signed-off-by: Mircea Caprioru <mircea.caprioru@...log.com>
---
drivers/iio/adc/ad_sigma_delta.c | 3 ++-
include/linux/iio/adc/ad_sigma_delta.h | 2 ++
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index 2640b75fb774..8ba90486c787 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -205,7 +205,7 @@ int ad_sd_reset(struct ad_sigma_delta *sigma_delta,
}
EXPORT_SYMBOL_GPL(ad_sd_reset);
-static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
+int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
unsigned int mode, unsigned int channel)
{
int ret;
@@ -242,6 +242,7 @@ static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
return ret;
}
+EXPORT_SYMBOL_GPL(ad_sd_calibrate);
/**
* ad_sd_calibrate_all() - Performs channel calibration
diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h
index 7716fa0c9fce..8a4e25a7080c 100644
--- a/include/linux/iio/adc/ad_sigma_delta.h
+++ b/include/linux/iio/adc/ad_sigma_delta.h
@@ -119,6 +119,8 @@ int ad_sd_reset(struct ad_sigma_delta *sigma_delta,
int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan, int *val);
+int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
+ unsigned int mode, unsigned int channel);
int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta,
const struct ad_sd_calib_data *cd, unsigned int n);
int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev,
--
2.17.1
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