Currently the following hang is observed during USB probe:
[ 1.243660] usbcore: registered new interface driver usb-storage
[ 1.261619] ci_hdrc ci_hdrc.1: doesn't support gadget
[ 1.266730] ci_hdrc ci_hdrc.1: EHCI Host Controller
[ 1.272058] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
[ 1.290639] ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
[ 1.301162] hub 1-0:1.0: USB hub found
[ 1.305248] hub 1-0:1.0: 1 port detected
(hangs here...)
Pass the 'regulator-always-on' to make sure that the USB PHY and USB hub are
properly powered.
Cc: <stable@xxxxxxxxxxxxxxx> # 3.16
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/imx51-babbage.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/imx51-babbage.dts b/arch/arm/boot/dts/imx51-babbage.dts
index 56569ce..65d3d97 100644
--- a/arch/arm/boot/dts/imx51-babbage.dts
+++ b/arch/arm/boot/dts/imx51-babbage.dts
@@ -137,6 +137,7 @@
regulator-max-microvolt = <5000000>;
gpio = <&gpio2 5 GPIO_ACTIVE_HIGH>;
enable-active-high;
+ regulator-always-on;
};
reg_usbotg_vbus: regulator@1 {
@@ -149,6 +150,7 @@
regulator-max-microvolt = <5000000>;
gpio = <&gpio1 7 GPIO_ACTIVE_HIGH>;
enable-active-high;
+ regulator-always-on;
};
};
--
1.9.1
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