linux-kernel - [PATCH 3.12 124/142] ARM: dts: imx23-olinuxino: Fix dr

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Message-Id: <a77374f8c2a293569167ade7589c7b26e574ecf2.1431761807.git.jslaby@suse.cz>
Date:	Sat, 16 May 2015 09:38:04 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Stefan Wahren <stefan.wahren@...e.com>,
	Shawn Guo <shawn.guo@...aro.org>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 124/142] ARM: dts: imx23-olinuxino: Fix dr_mode of usb0

From: Stefan Wahren <stefan.wahren@...e.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 0fdebe1a2f4d3a8fc03754022fabf8ba95e131a3 upstream.

The dr_mode of usb0 on imx233-olinuxino is left to default "otg".
Since the green LED (GPIO2_1) on imx233-olinuxino is connected to the
same pin as USB_OTG_ID it's possible to disable USB host by LED toggling:

echo 0 > /sys/class/leds/green/brightness
[ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
[ 1068.890000] usb usb1: USB disconnect, device number 1
[ 1068.920000] usb 1-1: USB disconnect, device number 2
[ 1068.920000] usb 1-1.1: USB disconnect, device number 3
[ 1069.070000] usb 1-1.2: USB disconnect, device number 4
[ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
[ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11

This patch fixes the issue by setting dr_mode to "host" in the dts file.

Reported-by: Harald Geyer <harald@...ib.org>
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
Reviewed-by: Fabio Estevam <fabio.estevam@...escale.com>
Reviewed-by: Marek Vasut <marex@...x.de>
Acked-by: Peter Chen <peter.chen@...escale.com>
Fixes: b49312948285 ("ARM: dts: imx23-olinuxino: Add USB host support")
Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm/boot/dts/imx23-olinuxino.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx23-olinuxino.dts b/arch/arm/boot/dts/imx23-olinuxino.dts
index fc766ae12e24..353d6f336212 100644
--- a/arch/arm/boot/dts/imx23-olinuxino.dts
+++ b/arch/arm/boot/dts/imx23-olinuxino.dts
@@ -93,6 +93,7 @@
 
 	ahb@...80000 {
 		usb0: usb@...80000 {
+			dr_mode = "host";
 			vbus-supply = <&reg_usb0_vbus>;
 			status = "okay";
 		};
-- 
2.3.7

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