Re: [PATCH] pinctrl: rockchip: enable clock when reading pin direction register

[Linus Walleij]

On Tue, Dec 12, 2017 at 6:43 PM, Brian Norris <briannorris@xxxxxxxxxxxx> wrote:

> We generally leave the GPIO clock disabled, unless an interrupt is
> requested or we're accessing IO registers. We forgot to do this for the
> ->get_direction() callback, which means we can sometimes [1] get
> incorrect results [2] from, e.g., /sys/kernel/debug/gpio.
>
> Enable the clock, so we get the right results!
>
> [1] Sometimes, because many systems have 1 or mor interrupt requested on
> each GPIO bank, so they always leave their clock on.
>
> [2] Incorrect, meaning the register returns 0, and so we interpret that
> as "input".
>
> Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>

Patch applied with Heiko's review tag.

Yours,
Linus Walleij