[PATCH v2] realtek: ensure output drivers are enabled in RTL8231
Sander Vanheule
sander at svanheule.net
Thu Sep 30 11:09:29 PDT 2021
Hi Paul,
Thanks for the update, looks good to me.
On Thu, 2021-09-30 at 20:15 +0300, Paul Fertser wrote:
> The bootloader can leave the GPIO expander in a state which doesn't have
> output drivers enabled so GPIOs will properly work for input but output
> operations will have no effect.
>
> To avoid disrupting the boot in case the bootloader left direction and
> data registers in an inconsistent state (e.g. pulling SoC's reset to 0)
> reconfigure everything as input.
>
> Signed-off-by: Paul Fertser <fercerpav at gmail.com>
Reviewed-by: Sander Vanheule <sander at svanheule.net>
Best,
Sander
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