lkml.org 
[lkml]   [2019]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 2/5] staging: iio: adc: Converted bool to bitfield format
On Sat, 23 Mar 2019 20:21:39 +0100
Cristian Sicilia <sicilia.cristian@gmail.com> wrote:

> Changed bool format to bitfield format to save space.
>
> Signed-off-by: Cristian Sicilia <sicilia.cristian@gmail.com>
>
> ---
> The strange thing is that this struct seems not populated
> using a DTS binding function.
Indeed and that should have definitely been a warning sign ;)
We are looking at traditional platform data here (pre device
tree) and generally we will want to drop it entirely for old
drivers that we are looking to move out of staging.

I don't mind improving it prior to dropping (as it avoids
setting bad precedence in the code base in the meantime) but
one comment inline...

> ---
> drivers/staging/iio/adc/ad7192.h | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/staging/iio/adc/ad7192.h b/drivers/staging/iio/adc/ad7192.h
> index 7433a43..87891ba 100644
> --- a/drivers/staging/iio/adc/ad7192.h
> +++ b/drivers/staging/iio/adc/ad7192.h
> @@ -35,13 +35,13 @@ struct ad7192_platform_data {
> u16 vref_mv;
> u8 clock_source_sel;
> u32 ext_clk_hz;
> - bool refin2_en;
> - bool rej60_en;
> - bool sinc3_en;
> - bool chop_en;
> - bool buf_en;
> - bool unipolar_en;
> - bool burnout_curr_en;
> -};
> + u8 refin2_en:1;
> + u8 rej60_en:1;
> + u8 sinc3_en:1;
> + u8 chop_en:1;
> + u8 buf_en:1;
> + u8 unipolar_en:1;
> + u8 burnout_curr_en:1;
> +} __attribute__((__packed__));
Please don't use packed for anything without a very very good reason.
it may result in data layouts that are much harder to read from.
That obviously doesn't matter here as I doubt it's read in a fast path.

>
> #endif /* IIO_ADC_AD7192_H_ */

\
 
 \ /
  Last update: 2019-03-24 13:35    [W:0.095 / U:40.416 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site