Re: [PATCH v2 4/8] arm64: dts: qcom: sa8775p-ride: move the reset-gpios property of the PHY

[Konrad Dybcio]

On 8.08.2023 21:01, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> 
> Device-tree bindings for MDIO define per-PHY reset-gpios as well as a
> global reset-gpios property at the MDIO node level which controls all
> devices on the bus. The latter is most likely a workaround for the
> chicken-and-egg problem where we cannot read the ID of the PHY before
> bringing it out of reset but we cannot bring it out of reset until we've
> read its ID.
> 
> I have proposed a comprehensive solution for this problem in 2020 but it
> never got upstream. We do however have workaround in place which allows
> us to hard-code the PHY id in the compatible property, thus skipping the
> ID scanning.
> 
> Let's make the device-tree for sa8775p-ride slightly more correct by
> moving the reset-gpios property to the PHY node with its ID put into the
> PHY node's compatible.
> 
> Link: https://lore.kernel.org/all/20200622093744.13685-1-brgl@xxxxxxxx/
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>

Konrad