linux-kernel - [PATCH 2/4] Staging: iio: accel: adis16201: Use GENMASK

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Date:   Fri, 23 Mar 2018 00:42:43 +0530
From:   Himanshu Jha <himanshujha199640@...il.com>
To:     jic23@...nel.org
Cc:     lars@...afoo.de, Michael.Hennerich@...log.com, knaack.h@....de,
        pmeerw@...erw.net, gregkh@...uxfoundation.org,
        linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, 21cnbao@...il.com,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH 2/4] Staging: iio: accel: adis16201: Use GENMASK

Use GENMASK to improve readability and remove the local variables used to
store intermediate data.

Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
---
 drivers/staging/iio/accel/adis16201.c | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/iio/accel/adis16201.c b/drivers/staging/iio/accel/adis16201.c
index b04dbb3..e7593fa 100644
--- a/drivers/staging/iio/accel/adis16201.c
+++ b/drivers/staging/iio/accel/adis16201.c
@@ -185,28 +185,24 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
 			       long mask)
 {
 	struct adis *st = iio_priv(indio_dev);
-	int bits;
-	s16 val16;
-	u8 addr;
+	int m;
 
-	switch (mask) {
-	case IIO_CHAN_INFO_CALIBBIAS:
-		switch (chan->type) {
-		case IIO_ACCEL:
-			bits = 12;
-			break;
-		case IIO_INCLI:
-			bits = 9;
-			break;
-		default:
-			return -EINVAL;
+	if (mask != IIO_CHAN_INFO_CALIBBIAS)
+		return -EINVAL;
+
+	switch (chan->type) {
+	case IIO_ACCEL:
+		m = GENMASK(11, 0);
+		break;
+	case IIO_INCLI:
+		m = GENMASK(8, 0);
+		break;
+	default:
+		return -EINVAL;
 		}
-		val16 = val & ((1 << bits) - 1);
-		addr = adis16201_addresses[chan->scan_index];
-		return adis_write_reg_16(st, addr, val16);
-	}
 
-	return -EINVAL;
+	return adis_write_reg_16(st, adis16201_addresses[chan->scan_index],
+				 val & m);
 }
 
 static const struct iio_chan_spec adis16201_channels[] = {
-- 
2.7.4