ARM: dts: imx51-zii-rdu1: limit usbh1 to full-speed

On RDU1, imx51 usbh1 interface is either not used, or used via external
block that breaks USB2 signalling.

To keep things working if high-speed device gets connected to that
block, use ChipIdea feature to limit port to full speed.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx51-zii-rdu1.dts b/arch/arm/boot/dts/imx51-zii-rdu1.dts
index 991fa07..0c8bae9 100644 (file)
--- a/arch/arm/boot/dts/imx51-zii-rdu1.dts
+++ b/arch/arm/boot/dts/imx51-zii-rdu1.dts
@@ -589,6 +589,7 @@
        phy_type = "ulpi";
        fsl,usbphy = <&usbh1phy>;
        disable-over-current;
+       maximum-speed = "full-speed";
        vbus-supply = <&reg_5p0v_main>;
        status = "okay";
 };