linux-kernel - [PATCH v2 6/9] Staging: iio: accel: adis16201: Use sign

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Date:   Sat, 17 Mar 2018 01:36:23 +0530
From:   Himanshu Jha <himanshujha199640@...il.com>
To:     jic23@...nel.org
Cc:     lars@...afoo.de, Michael.Hennerich@...log.com, pmeerw@...erw.net,
        gregkh@...uxfoundation.org, linux-iio@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        daniel.baluta@...il.com, 21cnbao@...il.com,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH v2 6/9] Staging: iio: accel: adis16201: Use sign_extend32 function

Use sign_extned32() for 32 bit sign extending rather than hard coding.

Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
---
v2:
   -no change in this patch.

 drivers/staging/iio/accel/adis16201.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/iio/accel/adis16201.c b/drivers/staging/iio/accel/adis16201.c
index 97150ea..298bf90 100644
--- a/drivers/staging/iio/accel/adis16201.c
+++ b/drivers/staging/iio/accel/adis16201.c
@@ -173,9 +173,8 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
 		ret = adis_read_reg_16(st, addr, &val16);
 		if (ret)
 			return ret;
-		val16 &= (1 << bits) - 1;
-		val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
-		*val = val16;
+
+		*val = sign_extend32(val16, bits - 1);
 		return IIO_VAL_INT;
 	}
 
-- 
2.7.4