Re: [PATCH 1/1] gpio: pisosr: Don't use magic numbers

[Alexander Stein <alexander.stein@systec-electronic.com>]

On Tuesday 16 February 2016 15:55:47, Linus Walleij wrote:
> On Mon, Feb 15, 2016 at 10:14 AM, Alexander Stein
> <alexander.stein@systec-electronic.com> wrote:
> 
> > At first view I thought this function returned an error, but actually
> > it is the input direction. Use the define for input which makes reading
> > the code much easier.
> >
> > Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
> 
> NACK that flag is for consumers, not drivers.
> Drivers have their own API and should ideally
> return a bool true/false, but that would be another major
> refactoring....

Well, having a callback get_direction returning a bool would seem really strange. Actually the comments on gpiod_get_direction explicitly state GPIOF_DIR_IN and GPIOF_DIR_OUT as return values which aren't used in that function itself, they come from the callback. Also other dirvers like e.g. gpio-ich return (in ichx_gpio_get_direction) GPIOF_DIR_IN or GPIOF_DIR_OUT.

Best regards,
Alexander
-- 
Dipl.-Inf. Alexander Stein
SYS TEC electronic GmbH
alexander.stein@systec-electronic.com

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