Re: [PATCH v3 4/4] Staging: iio: adis16209: Use sign_extend32 function

[Jonathan Cameron]

On Sun,  4 Mar 2018 18:15:06 +0530
Shreeya Patel <shreeya.patel23498@xxxxxxxxx> wrote:

> Use sign_extend32 function instead of manually coding
> it.
> 
> Signed-off-by: Shreeya Patel <shreeya.patel23498@xxxxxxxxx>
Applied to the togreg branch of iio.git and pushed out as testing for the
autobuilders to play with it.

Thanks,

Jonathan

> ---
> 
> Changes in v3
>   -After split patch.
> 
>  drivers/staging/iio/accel/adis16209.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/iio/accel/adis16209.c b/drivers/staging/iio/accel/adis16209.c
> index 9cb1ce0..a8453bf 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;