Hei hei,
I could not get ethernet to work on SAMA5D27-SOM1-EK1 with kernels v5.10 and v5.11 built by a recent ptxdist based DistroKit BSP, while it used to work with an older v4.19 kernel. Just applying this patch to the tree made ethernet working again, thus:
Tested-by: Alexander Dahl <ada@xxxxxxxxxxx>
Not sure why it worked with that older kernel, though.
I added Ahmad to Cc, he added board support to DistroKit for that board, and might want to know. And I added the devicetree list to Cc, I wondered why the patch was not there and get_maintainers.pl proposed it.
Thanks for fixing this and greetings
Alex
> nicolas.ferre@xxxxxxxxxxxxx hat am 17.02.2021 12:38 geschrieben:
>
>
> From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
>
> Fix the phy address to 7 for Ethernet PHY on SAMA5D27 SOM1. No
> connection established if phy address 0 is used.
>
> The board uses the 24 pins version of the KSZ8081RNA part, KSZ8081RNA
> pin 16 REFCLK as PHYAD bit [2] has weak internal pull-down. But at
> reset, connected to PD09 of the MPU it's connected with an internal
> pull-up forming PHYAD[2:0] = 7.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
> Fixes: 2f61929eb10a ("ARM: dts: at91: at91-sama5d27_som1: fix PHY ID")
> Cc: Ludovic Desroches <ludovic.desroches@xxxxxxxxxxxxx>
> Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.14+
> ---
> arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> index 1b1163858b1d..e3251f3e3eaa 100644
> --- a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> +++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> @@ -84,8 +84,8 @@ macb0: ethernet@f8008000 {
> pinctrl-0 = <&pinctrl_macb0_default>;
> phy-mode = "rmii";
>
> - ethernet-phy@0 {
> - reg = <0x0>;
> + ethernet-phy@7 {
> + reg = <0x7>;
> interrupt-parent = <&pioA>;
> interrupts = <PIN_PD31 IRQ_TYPE_LEVEL_LOW>;
> pinctrl-names = "default";
> --
> 2.30.0
>
>
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