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

From: Linus Walleij
Date: Tue Oct 30 2018 - 08:08:30 EST

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.

Linus Walleij