Hi Felix!

Thanks for your patch!

On Mon, Nov 29, 2021 at 4:54 PM Felix Fietkau [off-list ref] wrote:

From: John Crispin <john@phrozen.org>

Airoha's GPIO controller on their ARM EN7523 SoCs consists of two banks of 32
GPIOs. Each instance in DT is for an single bank.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

(...)

+config GPIO_EN7523
+       tristate "Airoha GPIO support"
+       depends on ARCH_AIROHA
+       default ARCH_AIROHA
+       select GPIO_GENERIC

Yes that looks applicable, but why isn't it used?

The few 32-bit registers look like an ideal candidate for
using the generic GPIO. Check similar drivers such as
drivers/gpio/gpio-ftgpio010.c and how it uses
bgpio_init() and the nice doc for bgpio_init() in
drivers/gpio/gpio-mmio.c.

If it's not working already with generic GPIO I do not
think it would be far fetched to fix it.

Yours,
Linus Walleij

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