Re: [PATCH v2 1/5] arm64: dts: meson: g12b: odroid-n2: fix PHY deassert timing requirements

[Martin Blumenstingl]

On Tue, Dec 1, 2020 at 2:21 PM Stefan Agner <stefan@xxxxxxxx> wrote:
>
> According to the datasheet (Rev. 1.9) the RTL8211F requires at least
> 72ms "for internal circuits settling time" before accessing the PHY
> egisters. This fixes an issue where the Ethernet link doesn't come up
> when using ip link set down/up:
>   [   29.360965] meson8b-dwmac ff3f0000.ethernet eth0: Link is Down
>   [   34.569012] meson8b-dwmac ff3f0000.ethernet eth0: PHY [0.0:00] driver [RTL8211F Gigabit Ethernet] (irq=31)
>   [   34.676732] meson8b-dwmac ff3f0000.ethernet: Failed to reset the dma
>   [   34.678874] meson8b-dwmac ff3f0000.ethernet eth0: stmmac_hw_setup: DMA engine initialization failed
>   [   34.687850] meson8b-dwmac ff3f0000.ethernet eth0: stmmac_open: Hw setup failed
>
> Fixes: 658e4129bb81 ("arm64: dts: meson: g12b: odroid-n2: add the Ethernet PHY reset line")
> Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
with the "registers" typo above fixed:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>