Re: [PATCH v2 2/2] pinctrl: Allow indicating loss of pin states during low-power

[Linus Walleij]

On Fri, Nov 3, 2017 at 12:15 AM, Florian Fainelli <f.fainelli@xxxxxxxxx> wrote:

> Some platforms (e.g: Broadcom STB: BMIPS_GENERIC/ARCH_BRCMSTB) will lose
> their register contents when entering their lower power state. In such a
> case, the pinctrl-single driver that is used will not be able to restore
> the power states without telling the core about it and having
> pinctrl_select_state() check for that.
>
> This patch adds a new optional boolean property that Device Tree can
> define in order to obtain exactly that and having the core pinctrl code
> take that into account.
>
> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>

Florian, I'm really sorry for losing track of this patch set, it's
important stuff and I see why systems are dependent on something
like this.

Tony: can you look at this from a pinctrl-single point of view?
This is the intended consumer: pinctrl-single users that lose the
hardware state over suspend/resume.

How do you see this working with other pinctrl-single users?

Yours,
Linus Walleij