linux-kernel - [PATCH V6 7/7] iio: adc: Add a common read function for PMIC5 and PMIC7

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Message-Id: <1590684869-15400-8-git-send-email-jprakash@codeaurora.org>
Date:   Thu, 28 May 2020 22:24:29 +0530
From:   Jishnu Prakash <jprakash@...eaurora.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        mka@...omium.org, linus.walleij@...aro.org,
        Jonathan.Cameron@...wei.com, andy.shevchenko@...il.com,
        amit.kucheria@...durent.com, smohanad@...eaurora.org,
        kgunda@...eaurora.org, aghayal@...eaurora.org,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org
Cc:     linux-arm-msm-owner@...r.kernel.org,
        Jishnu Prakash <jprakash@...eaurora.org>
Subject: [PATCH V6 7/7] iio: adc: Add a common read function for PMIC5 and PMIC7

Add a common function used for read_raw callback for both PMIC5
and PMIC7 ADCs.

Signed-off-by: Jishnu Prakash <jprakash@...eaurora.org>
---
 drivers/iio/adc/qcom-spmi-adc5.c | 53 +++++++++++++++++++---------------------
 1 file changed, 25 insertions(+), 28 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 0f9af66..fe49741 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -449,6 +449,13 @@ static int adc7_do_conversion(struct adc5_chip *adc,
 	return ret;
 }
 
+struct adc_do_conversion {
+	int (*adc_do_conversion)(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur);
+};
+
 static irqreturn_t adc5_isr(int irq, void *dev_id)
 {
 	struct adc5_chip *adc = dev_id;
@@ -487,9 +494,9 @@ static int adc7_of_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-static int adc5_read_raw(struct iio_dev *indio_dev,
+static int adc_read_raw_common(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
-			 long mask)
+			 long mask, struct adc_do_conversion do_conv)
 {
 	struct adc5_chip *adc = iio_priv(indio_dev);
 	struct adc5_channel_prop *prop;
@@ -500,8 +507,8 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc5_do_conversion(adc, prop, chan,
-				&adc_code_volt, &adc_code_cur);
+		ret = do_conv.adc_do_conversion(adc, prop, chan,
+					&adc_code_volt, &adc_code_cur);
 		if (ret)
 			return ret;
 
@@ -518,36 +525,26 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 	}
 }
 
-static int adc7_read_raw(struct iio_dev *indio_dev,
+static int adc5_read_raw(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
 			 long mask)
 {
-	struct adc5_chip *adc = iio_priv(indio_dev);
-	struct adc5_channel_prop *prop;
-	u16 adc_code_volt, adc_code_cur;
-	int ret;
-
-	prop = &adc->chan_props[chan->address];
-
-	switch (mask) {
-	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc7_do_conversion(adc, prop, chan,
-					&adc_code_volt, &adc_code_cur);
-		if (ret)
-			return ret;
+	struct adc_do_conversion do_conv;
 
-		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
-			&adc5_prescale_ratios[prop->prescale],
-			adc->data,
-			adc_code_volt, val);
+	do_conv.adc_do_conversion = adc5_do_conversion;
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
+}
 
-		if (ret)
-			return ret;
+static int adc7_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	struct adc_do_conversion do_conv;
 
-		return IIO_VAL_INT;
-	default:
-		return -EINVAL;
-	}
+	do_conv.adc_do_conversion = adc7_do_conversion;
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
 }
 
 static const struct iio_info adc5_info = {
-- 
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