From a61cb0ecc9138ea4621f9f5d85162a83ec810c56 Mon Sep 17 00:00:00 2001
From: Dongjin Kim <tobetter@gmail.com>
Date: Thu, 26 Aug 2021 12:28:32 +0900
Subject: [PATCH] arm64: dts: meson: sm1: add Ethernet PHY reset line for ODROID-C4/HC4
Git-commit: 9d02214f8332d5dbbcce3d6c5c915e54d43a0c46
Patch-mainline: v5.16-rc1
References: stable-5.14.19
[ Upstream commit 9d02214f8332d5dbbcce3d6c5c915e54d43a0c46 ]
This patch is to fix an issue that the ethernet link doesn't come up
when using ip link set down/up:
[ 11.428114] meson8b-dwmac ff3f0000.ethernet eth0: Link is Down
[ 14.428595] meson8b-dwmac ff3f0000.ethernet eth0: PHY [0.0:00] driver [RTL8211F Gigabit Ethernet] (irq=31)
[ 14.428610] meson8b-dwmac ff3f0000.ethernet: Failed to reset the dma
[ 14.428974] meson8b-dwmac ff3f0000.ethernet eth0: stmmac_hw_setup: DMA engine initialization failed
[ 14.711185] meson8b-dwmac ff3f0000.ethernet eth0: stmmac_open: Hw setup failed
This fix refers to two commits applied for ODROID-N2 (G12B).
commit 658e4129bb81 ("arm64: dts: meson: g12b: odroid-n2: add the Ethernet PHY reset line")
commit 1c7412530d5d0 ("arm64: dts: meson: g12b: odroid-n2: fix PHY deassert timing requirements")
Fixes: 88d537bc92ca ("arm64: dts: meson: convert meson-sm1-odroid-c4 to dtsi")
Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[narmstrong: added fixes tag and typo in commit log]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/YScKYFWlYymgGw3l@anyang-linuxfactory-or-kr
Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
index fd0ad85c165b..45e7fcb062f9 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid.dtsi
@@ -263,6 +263,10 @@ external_phy: ethernet-phy@0 {
reg = <0>;
max-speed = <1000>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <80000>;
+ reset-gpios = <&gpio GPIOZ_15 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;
+
interrupt-parent = <&gpio_intc>;
/* MAC_INTR on GPIOZ_14 */
interrupts = <26 IRQ_TYPE_LEVEL_LOW>;
--
2.26.2