On Fri, 22 Nov 2013 08:20:08 +0100
Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote:
> Hi Antony,
>
> On Fri, Nov 22, 2013 at 12:11:24AM +0400, Antony Pavlov wrote:
> > Also import related functions gpio_request_one() and
> > gpio_free_array().
> >
> > This commit imports code from linux 3.7 as
> > the more recent linux kernel versions use gpiolib descriptors,
> > see this commit for details:
> >
> > commit 372e722ea4dd4ca11c3d04845e11cbc15f32144c
> > Author: Alexandre Courbot <acourbot@xxxxxxxxxx>
> > Date: Sun Feb 3 01:29:29 2013 +0900
> >
> > gpiolib: use descriptors internally
> >
> > Make sure gpiolib works internally with descriptors and (chip, offset)
> > pairs instead of using the global integer namespace. This prepares the
> > ground for the removal of the global gpio_desc[] array and the
> > introduction of the descriptor-based GPIO API.
> >
> > Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
>
> What a pitty, we duplicated some work. I created exactly the same patch
> recently but haven't posted it yet, shame on me.
I must say "Thanks!" to Sebastian Hesselbarth. It's him who introduced
get_direction callback. His patch conflicted with patch in my local repo.
So I made the decision to post my patch as soon as possible.
> > +static inline int gpio_request_one(unsigned gpio,
> > + unsigned long flags, const char *label)
> > +{
> > + return 0;
> > +}
> > +
> > +static inline int gpio_request_array(const struct gpio *array, size_t num)
> > +{
> > + return 0;
> > +}
> > +
>
> That's the only place our patches differ. In my version I return -ENOSYS
> since gpio_request_one() and gpio_request_array() not only request gpios
> but also configure them. We can't return success without configuring the
> gpios. I applied your version but with -ENOSYS here.
>
> Sascha
>
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--
С уважением,
Павлов Антон
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