diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index 9ea3c8be87086c..b34af692612f5e 100644
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -38,30 +38,30 @@
 #define AD7291_T_AVERAGE		3
 #define AD7291_VOLTAGE_LIMIT_BASE	4
 #define AD7291_VOLTAGE_LIMIT_COUNT	8
-#define AD7291_T_SENSE_HIGH		0x1c
-#define AD7291_T_SENSE_LOW		0x1d
-#define AD7291_T_SENSE_HYST		0x1e
-#define AD7291_VOLTAGE_ALERT_STATUS	0x1f
+#define AD7291_T_SENSE_HIGH		0x1C
+#define AD7291_T_SENSE_LOW		0x1D
+#define AD7291_T_SENSE_HYST		0x1E
+#define AD7291_VOLTAGE_ALERT_STATUS	0x1F
 #define AD7291_T_ALERT_STATUS		0x20
 
 /*
  * AD7291 command
  */
-#define AD7291_AUTOCYCLE		0x1
-#define AD7291_RESET			0x2
-#define AD7291_ALERT_CLEAR		0x4
-#define AD7291_ALERT_POLARITY		0x8
-#define AD7291_EXT_REF			0x10
-#define AD7291_NOISE_DELAY		0x20
-#define AD7291_T_SENSE_MASK		0x40
-#define AD7291_VOLTAGE_MASK		0xff00
+#define AD7291_AUTOCYCLE		(1 << 0)
+#define AD7291_RESET			(1 << 1)
+#define AD7291_ALERT_CLEAR		(1 << 2)
+#define AD7291_ALERT_POLARITY		(1 << 3)
+#define AD7291_EXT_REF			(1 << 4)
+#define AD7291_NOISE_DELAY		(1 << 5)
+#define AD7291_T_SENSE_MASK		(1 << 7)
+#define AD7291_VOLTAGE_MASK		0xFF00
 #define AD7291_VOLTAGE_OFFSET		0x8
 
 /*
  * AD7291 value masks
  */
-#define AD7291_CHANNEL_MASK		0xf000
-#define AD7291_VALUE_MASK		0xfff
+#define AD7291_CHANNEL_MASK		0xF000
+#define AD7291_VALUE_MASK		0xFFF
 #define AD7291_T_VALUE_SIGN		0x400
 #define AD7291_T_VALUE_FLOAT_OFFSET	2
 #define AD7291_T_VALUE_FLOAT_MASK	0x2