Re: [PATCH 1/2] pinctrl: samsung: fix suspend/resume functionality

From: Doug Anderson
Date: Thu May 16 2013 - 19:10:36 EST


On Thu, May 16, 2013 at 3:56 PM, Tomasz Figa <tomasz.figa@xxxxxxxxx> wrote:
> Seems like I need some sleep, as I'm already starting to overlook large
> blobs of code.
> Originally, GPIO suspend/resume handlers have been configured in
> drivers/gpio/gpio-samsung.c, by setting pm field of samsung_gpio_chip
> struct to point to appropriate samsung_gpio_pm struct, which contains
> pointers to save and resume callbacks.
> In result, samsung_gpio_pm_2bit_* or samsung_gpio_pm_4bit_* have been
> used, depending on bank type, on all SoCs.
> Now since the documentation states that wake-up reset doesn't reset GPIO
> registers (at least on S3C2440 and S3C2416), I wonder what is the correct
> way of handling them.

If state of these registers isn't lost on those SoCs then running the
save/restore shouldn't _hurt_ though, right? If you can run the old
GPIO code on one of those systems and do a suspend/resume you could

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