From: Shreeya Patel <shreeya.patel23498@gmail.com>
Date: Sun, 4 Mar 2018 12:45:06 +0000 (+0530)
Subject: Staging: iio: adis16209: Use sign_extend32 function
X-Git-Tag: v4.17-rc1~124^2~205^2~20
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9dd6ec17a8b06a75558b00c50676f847f7fa6513;p=linux.git

Staging: iio: adis16209: Use sign_extend32 function

Use sign_extend32 function instead of manually coding
it.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/staging/iio/accel/adis16209.c b/drivers/staging/iio/accel/adis16209.c
index 8ffde7ea94c4..72a18cfe81ee 100644
--- a/drivers/staging/iio/accel/adis16209.c
+++ b/drivers/staging/iio/accel/adis16209.c
@@ -212,9 +212,8 @@ static int adis16209_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;
 	}
 	return -EINVAL;