linux-kernel - [PATCH 5.1 121/122] ARM: dts: imx6q-logicpd: Reduce inrush current on USBH1

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Date:   Thu, 23 May 2019 21:07:23 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Adam Ford <aford173@...il.com>,
        Shawn Guo <shawnguo@...nel.org>
Subject: [PATCH 5.1 121/122] ARM: dts: imx6q-logicpd: Reduce inrush current on USBH1

From: Adam Ford <aford173@...il.com>

commit 7aedca875074b33795bc77066b325898b1eb8032 upstream.

Some USB peripherals draw more power, and the sourcing regulator
take a little time to turn on.  This patch fixes an issue where
some devices occasionally do not get detected, because the power
isn't quite ready when communication starts, so we add a bit
of a delay.

Fixes: 1c207f911fe9 ("ARM: dts: imx: Add support for Logic PD i.MX6QD EVM")
Signed-off-by: Adam Ford <aford173@...il.com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
+++ b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
@@ -88,6 +88,7 @@
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		gpio = <&gpio7 12 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <70000>;
 		enable-active-high;
 	};