diff mbox series

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

Message ID 14754fd95378b78eb9a0a3f8b6bab13f7263c7f1.1606828668.git.stefan@agner.ch
State Superseded
Headers show
Series [v2,1/5] arm64: dts: meson: g12b: odroid-n2: fix PHY deassert timing requirements | expand

Commit Message

Stefan Agner Dec. 1, 2020, 1:21 p.m. UTC
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@agner.ch>
---
 arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Martin Blumenstingl Dec. 5, 2020, 1:14 p.m. UTC | #1
On Tue, Dec 1, 2020 at 2:21 PM Stefan Agner <stefan@agner.ch> 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@agner.ch>

with the "registers" typo above fixed:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
diff mbox series

Patch

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 6982632ae646..39a09661c5f6 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 @@  external_phy: ethernet-phy@0 {
 		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>;