Use the bitfield macro FIELD_GET, and GENMASK to do the shift and mask in
one go. This makes the code more readable than explicit masking followed
by a shift.
Signed-off-by: Melissa Wen <melissa.srw@xxxxxxxxx>
---
drivers/staging/iio/cdc/ad7150.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index 24601ba7db88..4ba46fb6ac02 100644
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -5,6 +5,7 @@
* Copyright 2010-2011 Analog Devices Inc.
*/
+#include <linux/bitfield.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/kernel.h>
@@ -44,6 +45,9 @@
#define AD7150_SN0_REG 0x16
#define AD7150_ID_REG 0x17
+/* AD7150 masks */
+#define AD7150_THRESHTYPE_MSK GENMASK(6, 5)
+
/**
* struct ad7150_chip_info - instance specific chip data
* @client: i2c client for this device
@@ -136,7 +140,7 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
- threshtype = (ret >> 5) & 0x03;
+ threshtype = FIELD_GET(AD7150_THRESHTYPE_MSK, ret);
adaptive = !!(ret & 0x80);
switch (type) {
--
2.20.1
