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 seen on ODROID-C2 where the Ethernet > link doesn't come up when using ip link set down/up: > [ 6630.714855] meson8b-dwmac c9410000.ethernet eth0: Link is Down > [ 6630.785775] meson8b-dwmac c9410000.ethernet eth0: PHY [stmmac-0:00] driver [RTL8211F Gigabit Ethernet] (irq=36) > [ 6630.893071] meson8b-dwmac c9410000.ethernet: Failed to reset the dma > [ 6630.893800] meson8b-dwmac c9410000.ethernet eth0: stmmac_hw_setup: DMA engine initialization failed > [ 6630.902835] meson8b-dwmac c9410000.ethernet eth0: stmmac_open: Hw setup failed > > Fixes: f29cabf240ed ("arm64: dts: meson: use the generic Ethernet PHY reset GPIO bindings") > Signed-off-by: Stefan Agner <stefan@xxxxxxxx> with the "registers" typo above fixed: Reviewed-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>