linux-kernel - [PATCH 5.15 044/279] arm64: dts: imx8mm-kontron: Fix reset delays for ethernet PHY

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Message-Id: <20211124115720.248284776@linuxfoundation.org>
Date:   Wed, 24 Nov 2021 12:55:31 +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, Heiko Thiery <heiko.thiery@...il.com>,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 044/279] arm64: dts: imx8mm-kontron: Fix reset delays for ethernet PHY

From: Frieder Schrempf <frieder.schrempf@...tron.de>

[ Upstream commit 315e7b884190a6c9c28e95ad3b724dde9e922b99 ]

According to the datasheet the VSC8531 PHY expects a reset pulse of 100 ns
and a delay of 15 ms after the reset has been deasserted. Set the matching
values in the devicetree.

Reported-by: Heiko Thiery <heiko.thiery@...il.com>
Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
index e99e7644ff392..49d7470812eef 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts
@@ -123,8 +123,8 @@
 
 		ethphy: ethernet-phy@0 {
 			reg = <0>;
-			reset-assert-us = <100>;
-			reset-deassert-us = <100>;
+			reset-assert-us = <1>;
+			reset-deassert-us = <15000>;
 			reset-gpios = <&gpio4 27 GPIO_ACTIVE_LOW>;
 		};
 	};
-- 
2.33.0