Signed-off-by: Peter Meerwald <pmeerw@xxxxxxxxxx>
---
drivers/iio/adc/ad7887.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 749a6ca..2fd012e 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/interrupt.h>
+#include <linux/bitops.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -25,14 +26,14 @@
#include <linux/platform_data/ad7887.h>
-#define AD7887_REF_DIS (1 << 5) /* on-chip reference disable */
-#define AD7887_DUAL (1 << 4) /* dual-channel mode */
-#define AD7887_CH_AIN1 (1 << 3) /* convert on channel 1, DUAL=1 */
-#define AD7887_CH_AIN0 (0 << 3) /* convert on channel 0, DUAL=0,1 */
-#define AD7887_PM_MODE1 (0) /* CS based shutdown */
-#define AD7887_PM_MODE2 (1) /* full on */
-#define AD7887_PM_MODE3 (2) /* auto shutdown after conversion */
-#define AD7887_PM_MODE4 (3) /* standby mode */
+#define AD7887_REF_DIS BIT(5) /* on-chip reference disable */
+#define AD7887_DUAL BIT(4) /* dual-channel mode */
+#define AD7887_CH_AIN1 BIT(3) /* convert on channel 1, DUAL=1 */
+#define AD7887_CH_AIN0 0 /* convert on channel 0, DUAL=0,1 */
+#define AD7887_PM_MODE1 0 /* CS based shutdown */
+#define AD7887_PM_MODE2 1 /* full on */
+#define AD7887_PM_MODE3 2 /* auto shutdown after conversion */
+#define AD7887_PM_MODE4 3 /* standby mode */
enum ad7887_channels {
AD7887_CH0,
@@ -40,8 +41,6 @@ enum ad7887_channels {
AD7887_CH1,
};
-#define RES_MASK(bits) ((1 << (bits)) - 1)
-
/**
* struct ad7887_chip_info - chip specifc information
* @int_vref_mv: the internal reference voltage
@@ -167,7 +166,7 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
*val = ret >> chan->scan_type.shift;
- *val &= RES_MASK(chan->scan_type.realbits);
+ *val &= GENMASK(chan->scan_type.realbits - 1, 0);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
if (st->reg) {
--
1.9.1
--
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