Re: [PATCH] pinctrl/amd: save pin registers over suspend/resume

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Mon, Sep 11, 2017 at 8:11 AM, Daniel Drake <drake@xxxxxxxxxxxx> wrote:

> The touchpad in the Asus laptop models X505BA/BP and X542BA/BP is
> unresponsive after suspend/resume. The following error appears during
> resume:
>
>   i2c_hid i2c-ELAN1300:00: failed to reset device.
>
> The problem here is that i2c_hid does not notice the interrupt being
> generated at this point, because the GPIO is no longer configured
> for interrupts.
>
> Fix this by saving pinctrl-amd pin registers during suspend and
> restoring them at resume time.
>
> Based on code from pinctrl-intel.
>
> Signed-off-by: Daniel Drake <drake@xxxxxxxxxxxx>

Excellent analysis and patch.

Applied for fixes and tagged for stable.

Yours,
Linus Walleij
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