[PATCH] gpiolib: Add of_get_gpio_chip_by_phandle() helper

[Linus Walleij]

On Wed, May 2, 2012 at 6:51 PM, viresh kumar <viresh.linux at gmail.com> wrote:

> So i need someway of accessing gpio chip
> from pinctrl driver. How should i do it?

I once proposed a patch like this to gpiolib and Grant NACK:ed it.
It was one of the reasons I created pinctrl to begin with...

Yes, I know it is sometimes a trouble to get the struct gpio_chip *
pointer out, especially if the drivers for pinctrl and GPIO is in
different files with their own say platform_device probe() function
or so.

The U300 solution isn't super-clean, and I have another
solution for Nomadik which is cleaner, but there GPIO and
pinctrl is in the same file. Expect to mail that out tomorrow.

Yours,
Linus Walleij