linux-kernel - [PATCH 4.0 30/60] ARM: dts: imx23-olinuxino: Fix dr

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Date:	Fri, 15 May 2015 16:14:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Harald Geyer <harald@...ib.org>,
	Stefan Wahren <stefan.wahren@...e.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Marek Vasut <marex@...x.de>,
	Peter Chen <peter.chen@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH 4.0 30/60] ARM: dts: imx23-olinuxino: Fix dr_mode of usb0

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

------------------

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

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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/boot/dts/imx23-olinuxino.dts |    1 +
 1 file changed, 1 insertion(+)

--- 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";
 		};


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