[PATCH RESEND 1/5] pinctrl: allows not to define the get_group_pins operation

[Antoine Ténart]

Linus,

On Tue, Apr 22, 2014 at 02:48:04PM +0200, Linus Walleij wrote:
> On Thu, Apr 10, 2014 at 3:07 PM, Antoine Ténart
> <antoine.tenart at free-electrons.com> wrote:
> 
> > When using a group only pinctrl driver, which does not have any
> > information on the pins it is useless to define a get_group_pins
> > always returning an empty list of pins.
> >
> > When not using get_group_pin[1], a driver must implement it so
> > pins = NULL and num_pins = 0. This patch makes it the default
> > behaviour if not defined in the pinctrl driver when used in
> > pinmux enable and disable funtions and in pinctrl_groups_show.
> >
> > It also adds a check in pinctrl_get_group_pins and return -EINVAL if
> > not defined. This function is called in the gpiolib when adding when
> > pingroup range. It cannot be used if no group is defined, so this seams
> > reasonable.
> >
> > [1] get_group_pin(struct pinctrl_dev *pctldev,
> >                   unsigned selector,
> >                   const unsigned **pins,
> >                   unsigned *num_pins);
> >
> > Signed-off-by: Antoine Ténart <antoine.tenart at free-electrons.com>
> 
> OK makes perfect sense.
> 
> Patch applied.

Thanks!

> Can you please check the Documentation/pinctrl.txt to see
> if anything needs to be updated due to this?

I just checked and did not see needed updates due to this patch.

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com