linux-kernel - [PATCH 5.10 17/99] arm64: dts: imx8mp-evk: Improve the Ethernet PHY description

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Date:   Mon, 20 Dec 2021 15:33:50 +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, Joakim Zhang <qiangqing.zhang@....com>,
        Fabio Estevam <festevam@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Subject: [PATCH 5.10 17/99] arm64: dts: imx8mp-evk: Improve the Ethernet PHY description

From: Fabio Estevam <festevam@...il.com>

commit 798a1807ab13a38e21c6fecd8d22a513d6786e2d upstream.

According to the datasheet RTL8211, it must be asserted low for at least
10ms and at least 72ms "for internal circuits settling time" before
accessing the PHY registers.

Add properties to describe such requirements.

Reported-by: Joakim Zhang <qiangqing.zhang@....com>
Signed-off-by: Fabio Estevam <festevam@...il.com>
Tested-by: Joakim Zhang <qiangqing.zhang@....com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Cc: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -62,6 +62,8 @@
 			reg = <1>;
 			eee-broken-1000t;
 			reset-gpios = <&gpio4 2 GPIO_ACTIVE_LOW>;
+			reset-assert-us = <10000>;
+			reset-deassert-us = <80000>;
 		};
 	};
 };