linux-kernel - [PATCH 2/7] ARM: dts: imx6ul-txul: specify ethernet phy reset post-delay

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Message-Id: <1507891383-15452-3-git-send-email-LW@KARO-electronics.de>
Date:   Fri, 13 Oct 2017 12:42:58 +0200
From:   Lothar Waßmann <LW@...O-electronics.de>
To:     Fabio Estevam <fabio.estevam@....com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Sascha Hauer <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Lothar Waßmann <LW@...O-electronics.de>
Subject: [PATCH 2/7] ARM: dts: imx6ul-txul: specify ethernet phy reset post-delay

Under certain circumstances the ethernet PHY cannot be detected on
Ka-Ro electronics TXUL modules. Using a phy-reset-post-delay of > 5ms
alleviates this problem. Specify a value of 10ms to be on the safe side.

Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
---
 arch/arm/boot/dts/imx6ul-tx6ul.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx6ul-tx6ul.dtsi b/arch/arm/boot/dts/imx6ul-tx6ul.dtsi
index d30c4e05..9e2a966 100644
--- a/arch/arm/boot/dts/imx6ul-tx6ul.dtsi
+++ b/arch/arm/boot/dts/imx6ul-tx6ul.dtsi
@@ -308,6 +308,7 @@
 	pinctrl-0 = <&pinctrl_enet1 &pinctrl_enet1_mdio &pinctrl_etnphy0_rst>;
 	phy-mode = "rmii";
 	phy-reset-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;
+	phy-reset-post-delay = <10>;
 	phy-supply = <&reg_3v3_etn>;
 	phy-handle = <&etnphy0>;
 	status = "okay";
-- 
2.1.4