[PATCH v4 3/4] iio: adc: qcom-pm8xxx-xoadc: constify pointers in read operations

[Antony Kurniawan Soemardi]

These functions do not modify the indio_dev & adc structure, so they
should be marked const to allow the compiler to catch any accidental
modifications and to document the read only nature of these functions.

Signed-off-by: Antony Kurniawan Soemardi <linux@xxxxxxxxxxxxxx>
---
 drivers/iio/adc/qcom-pm8xxx-xoadc.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index 89858e81c859..2ee080b27d93 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -414,8 +414,8 @@ struct pm8xxx_xoadc {
 
 static irqreturn_t pm8xxx_eoc_irq(int irq, void *d)
 {
-	struct iio_dev *indio_dev = d;
-	struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
+	const struct iio_dev *indio_dev = d;
+	const struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
 
 	complete(&adc->complete);
 
@@ -423,7 +423,7 @@ static irqreturn_t pm8xxx_eoc_irq(int irq, void *d)
 }
 
 static struct pm8xxx_chan_info *
-pm8xxx_get_channel(struct pm8xxx_xoadc *adc, u8 chan)
+pm8xxx_get_channel(const struct pm8xxx_xoadc *adc, u8 chan)
 {
 	int i;
 
@@ -435,7 +435,7 @@ pm8xxx_get_channel(struct pm8xxx_xoadc *adc, u8 chan)
 	return NULL;
 }
 
-static int pm8xxx_read_channel_rsv(struct pm8xxx_xoadc *adc,
+static int pm8xxx_read_channel_rsv(const struct pm8xxx_xoadc *adc,
 				   const struct pm8xxx_chan_info *ch,
 				   u8 rsv, u16 *adc_code,
 				   bool force_ratiometric)
@@ -564,7 +564,7 @@ static int pm8xxx_read_channel_rsv(struct pm8xxx_xoadc *adc,
 	return ret;
 }
 
-static int pm8xxx_read_channel(struct pm8xxx_xoadc *adc,
+static int pm8xxx_read_channel(const struct pm8xxx_xoadc *adc,
 			       const struct pm8xxx_chan_info *ch,
 			       u16 *adc_code)
 {
@@ -647,7 +647,7 @@ static int pm8xxx_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *chan,
 			   int *val, int *val2, long mask)
 {
-	struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
+	const struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
 	const struct pm8xxx_chan_info *ch;
 	u16 adc_code;
 	int ret;
@@ -948,8 +948,8 @@ static int pm8xxx_xoadc_probe(struct platform_device *pdev)
 
 static void pm8xxx_xoadc_remove(struct platform_device *pdev)
 {
-	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-	struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
+	const struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	const struct pm8xxx_xoadc *adc = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
 

-- 
2.34.1