EHCI1 provides an HSIC interface. This interface is exposed on the board through two pins among the GPIO header. With the PHY now powered up and responding, enabling the interface when nothing is connected results in a lot of error messages: usb 2-1: device descriptor read/64, error -71 usb 2-1: device descriptor read/64, error -71 usb 2-1: new high-speed USB device number 3 using ehci-platform usb 2-1: device descriptor read/64, error -71 usb 2-1: device descriptor read/64, error -71 usb 2-1: new high-speed USB device number 4 using ehci-platform usb 2-1: device not accepting address 4, error -71 usb 2-1: new high-speed USB device number 5 using ehci-platform usb 2-1: device not accepting address 5, error -71 usb usb2-port1: unable to enumerate USB device Disable it by default, but leave the entries in the board DTS. Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx> --- Changes since v1: none --- arch/arm/boot/dts/sun9i-a80-optimus.dts | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/sun9i-a80-optimus.dts b/arch/arm/boot/dts/sun9i-a80-optimus.dts index d805cb50b5c8..ceb6ef15d669 100644 --- a/arch/arm/boot/dts/sun9i-a80-optimus.dts +++ b/arch/arm/boot/dts/sun9i-a80-optimus.dts @@ -112,7 +112,8 @@ }; &ehci1 { - status = "okay"; + /* Enable if HSIC peripheral is connected */ + status = "disabled"; }; &ehci2 { @@ -484,7 +485,8 @@ &usbphy2 { phy-supply = <®_bldo4>; - status = "okay"; + /* Enable if HSIC peripheral is connected */ + status = "disabled"; }; &usbphy3 { -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html