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

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Date:   Sun, 18 Mar 2018 08:33:14 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Himanshu Jha <himanshujha199640@...il.com>
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
Subject: Re: [PATCH v2 6/9] Staging: iio: accel: adis16201: Use
 sign_extend32 function

On Sat, 17 Mar 2018 01:36:23 +0530
Himanshu Jha <himanshujha199640@...il.com> wrote:

> Use sign_extned32() for 32 bit sign extending rather than hard coding.
> 
> Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>

Great, applied.

Thanks,

Jonathan

> ---
> 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;
>  	}
>