Re: [PATCH v7 0/2] add gpio-line-mux

[Bartosz Golaszewski]

On Sat, 27 Dec 2025 18:01:32 +0000, Jonas Jelonek wrote:
> This proposes a new type of virtual GPIO controller and corresponding
> driver to provide a 1-to-many mapping between virtual GPIOs and a single
> real GPIO in combination with a multiplexer. Existing drivers apparently
> do not serve the purpose for what I need.
> 
> I came across an issue with a switch device from Zyxel which has two
> SFP+ cages. Most similar switches either wire up the SFP signals
> (RX_LOS, MOD_ABS, TX_FAULT, TX_DISABLE) directly to the SoC (if it has
> enough GPIOs) or two a GPIO expander (for which a driver usually
> exists). However, Zyxel decided to do it differently in the following
> way:
>   The signals RX_LOS, MOD_ABS and TX_FAULT share a single GPIO line to
>   the SoC. Which one is actually connected to that GPIO line at a time
>   is controlled by a separate multiplexer, a GPIO multiplexer in this
>   case (which uses two other GPIOs). Only the TX_DISABLE is separate.
> 
> [...]

Applied, thanks!

[1/2] dt-bindings: gpio: add gpio-line-mux controller
      commit: 2a7618ba8698874e9871a8ec5453e0068e94d9e5
[2/2] gpio: add gpio-line-mux driver
      commit: 2b03d9a40cd1fea42fd65d2b66df80edc0f374c8

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>