From: Stefan Agner stefan@agner.ch
[ Upstream commit 1c7412530d5d0e0a0b27f1642f5c13c8b9f36f05 ]
According to the datasheet (Rev. 1.9) the RTL8211F requires at least 72ms "for internal circuits settling time" before accessing the PHY registers. 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") Reviewed-by: Martin Blumenstingl martin.blumenstingl@googlemail.com Signed-off-by: Stefan Agner stefan@agner.ch Signed-off-by: Kevin Hilman khilman@baylibre.com Link: https://lore.kernel.org/r/df3f5c4fc6e43c55429fd3662a636036a21eed49.160736352... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi index 6982632ae6461..39a09661c5f62 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi @@ -413,7 +413,7 @@ max-speed = <1000>;
reset-assert-us = <10000>; - reset-deassert-us = <30000>; + reset-deassert-us = <80000>; reset-gpios = <&gpio GPIOZ_15 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;
interrupt-parent = <&gpio_intc>;