Re: [PATCH 2/2] pinctrl: pinctrl-npcm7xx: Set BGPIOF_VOLATILE_REG

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Wed, Oct 17, 2018 at 11:30 PM Kun Yi <kunyi@xxxxxxxxxx> wrote:

> Indicate that the pins are both controlled by the pinctrl driver and the
> generic GPIO driver, thus GPIO driver should read the register value
> before updating, instead of using the stored shadow register values.
>
> Signed-off-by: Kun Yi <kunyi@xxxxxxxxxx>

This is quite a rough measure, if we instead use regmap-mmio
we can exercise fine control over what register are volatile and
not instead of saying that all of them or some of them are.

Yours,
Linus Walleij