iio:adc:ad799x: Use BIT() and GENMASK()

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 15 insertions, 16 deletions

diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index 878400c33137..b3799a8056c8 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -32,6 +32,7 @@
 #include <linux/types.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/bitops.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -41,7 +42,7 @@
 #include <linux/iio/triggered_buffer.h>
 
 #define AD799X_CHANNEL_SHIFT                    4
-#define AD799X_STORAGEBITS                      16
+
 /*
  * AD7991, AD7995 and AD7999 defines
  */
@@ -55,10 +56,10 @@
  * AD7992, AD7993, AD7994, AD7997 and AD7998 defines
  */
 
-#define AD7998_FLTR                             0x08
-#define AD7998_ALERT_EN                         0x04
-#define AD7998_BUSY_ALERT                       0x02
-#define AD7998_BUSY_ALERT_POL                   0x01
+#define AD7998_FLTR                             BIT(3)
+#define AD7998_ALERT_EN                         BIT(2)
+#define AD7998_BUSY_ALERT                       BIT(1)
+#define AD7998_BUSY_ALERT_POL                   BIT(0)
 
 #define AD7998_CONV_RES_REG                     0x0
 #define AD7998_ALERT_STAT_REG                   0x1
@@ -69,7 +70,7 @@
 #define AD7998_DATAHIGH_REG(x)                  ((x) * 3 + 0x5)
 #define AD7998_HYST_REG(x)                      ((x) * 3 + 0x6)
 
-#define AD7998_CYC_MASK                         0x7
+#define AD7998_CYC_MASK                         GENMASK(2, 0)
 #define AD7998_CYC_DIS                          0x0
 #define AD7998_CYC_TCONF_32                     0x1
 #define AD7998_CYC_TCONF_64                     0x2
@@ -85,10 +86,8 @@
  * AD7997 and AD7997 defines
  */
 
-#define AD7997_8_READ_SINGLE                    0x80
-#define AD7997_8_READ_SEQUENCE                  0x70
-/* TODO: move this into a common header */
-#define RES_MASK(bits)  ((1 << (bits)) - 1)
+#define AD7997_8_READ_SINGLE                    BIT(7)
+#define AD7997_8_READ_SEQUENCE                  (BIT(6) | BIT(5) | BIT(4))
 
 enum {
         ad7991,
@@ -205,12 +204,12 @@ static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
         case ad7991:
         case ad7995:
         case ad7999:
-                cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT);
+                cmd = st->config | (BIT(ch) << AD799X_CHANNEL_SHIFT);
                 break;
         case ad7992:
         case ad7993:
         case ad7994:
-                cmd = (1 << ch) << AD799X_CHANNEL_SHIFT;
+                cmd = BIT(ch) << AD799X_CHANNEL_SHIFT;
                 break;
         case ad7997:
         case ad7998:
@@ -244,7 +243,7 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
                 if (ret < 0)
                         return ret;
                 *val = (ret >> chan->scan_type.shift) &
-                        RES_MASK(chan->scan_type.realbits);
+                        GENMASK(chan->scan_type.realbits - 1, 0);
                 return IIO_VAL_INT;
         case IIO_CHAN_INFO_SCALE:
                 ret = regulator_get_voltage(st->vref);
@@ -359,7 +358,7 @@ static int ad799x_write_event_value(struct iio_dev *indio_dev,
         int ret;
         struct ad799x_state *st = iio_priv(indio_dev);
 
-        if (val < 0 || val > RES_MASK(chan->scan_type.realbits))
+        if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
                 return -EINVAL;
 
         mutex_lock(&indio_dev->mlock);
@@ -388,7 +387,7 @@ static int ad799x_read_event_value(struct iio_dev *indio_dev,
         if (ret < 0)
                 return ret;
         *val = (ret >> chan->scan_type.shift) &
-                RES_MASK(chan->scan_type.realbits);
+                GENMASK(chan->scan_type.realbits - 1 , 0);
 
         return IIO_VAL_INT;
 }
@@ -408,7 +407,7 @@ static irqreturn_t ad799x_event_handler(int irq, void *private)
                 goto done;
 
         for (i = 0; i < 8; i++) {
-                if (ret & (1 << i))
+                if (ret & BIT(i))
                         iio_push_event(indio_dev,
                                        i & 0x1 ?
                                        IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,