linux-kernel - [PATCH 5.10 354/717] arm64: dts: meson: g12b: w400: fix PHY deassert timing requirements

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Message-Id: <20201228125037.979499850@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:45:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Stefan Agner <stefan@...er.ch>,
        Kevin Hilman <khilman@...libre.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 354/717] arm64: dts: meson: g12b: w400: fix PHY deassert timing requirements

From: Stefan Agner <stefan@...er.ch>

[ Upstream commit 9e454e37dc7c0ee9e108d70b983e7a71332aedff ]

According to the datasheet (Rev. 1.9) the RTL8211F requires at least
72ms "for internal circuits settling time" before accessing the PHY
egisters. On similar boards with the same PHY this fixes an issue where
Ethernet link would not come up when using ip link set down/up.

Fixes: 2cd2310fca4c ("arm64: dts: meson-g12b-ugoos-am6: add initial device-tree")
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Signed-off-by: Stefan Agner <stefan@...er.ch>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
Link: https://lore.kernel.org/r/46298e66572784c44f873f1b71cc4ab3d8fc5aa6.1607363522.git.stefan@agner.ch
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi
index 2802ddbb83ac7..feb0885047400 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi
@@ -264,7 +264,7 @@
 		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>;
-- 
2.27.0