2018-06-12 16:49:48

by Karim Eshapa

Subject: [PATCH] staging:iio:accel:adis16203: sign extend function rather code duplication

Use sign_extend32 kernel function instead of code duplication.
This function is also safe for 16 bits.

Signed-off-by: Karim Eshapa <[email protected]>
---
drivers/staging/iio/accel/adis16203.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/iio/accel/adis16203.c b/drivers/staging/iio/accel/adis16203.c
index b3e4571340ab..5cc96c8086b5 100644
--- a/drivers/staging/iio/accel/adis16203.c
+++ b/drivers/staging/iio/accel/adis16203.c
@@ -168,7 +168,6 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
{
struct adis *st = iio_priv(indio_dev);
int ret;
- int bits;
u8 addr;
s16 val16;

@@ -202,14 +201,11 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
*val = 25000 / -470 - 1278; /* 25 C = 1278 */
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBBIAS:
- bits = 14;
addr = adis16203_addresses[chan->scan_index];
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, 13);
return IIO_VAL_INT;
default:
return -EINVAL;
--
2.17.1

2018-06-16 18:06:08

by Jonathan Cameron

Subject: Re: [PATCH] staging:iio:accel:adis16203: sign extend function rather code duplication

On Tue, 12 Jun 2018 18:48:38 +0200
Karim Eshapa <[email protected]> wrote:

> Use sign_extend32 kernel function instead of code duplication.
> This function is also safe for 16 bits.
>
> Signed-off-by: Karim Eshapa <[email protected]>

Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.

Thanks,

Jonathan

> ---
> drivers/staging/iio/accel/adis16203.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/staging/iio/accel/adis16203.c b/drivers/staging/iio/accel/adis16203.c
> index b3e4571340ab..5cc96c8086b5 100644
> --- a/drivers/staging/iio/accel/adis16203.c
> +++ b/drivers/staging/iio/accel/adis16203.c
> @@ -168,7 +168,6 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
> {
> struct adis *st = iio_priv(indio_dev);
> int ret;
> - int bits;
> u8 addr;
> s16 val16;
>
> @@ -202,14 +201,11 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
> *val = 25000 / -470 - 1278; /* 25 C = 1278 */
> return IIO_VAL_INT;
> case IIO_CHAN_INFO_CALIBBIAS:
> - bits = 14;
> addr = adis16203_addresses[chan->scan_index];
> 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, 13);
> return IIO_VAL_INT;
> default:
> return -EINVAL;