i.MX6 USB OTG support is broken on linux-next
shawn.guo at freescale.com
Fri May 9 06:00:47 PDT 2014
I'm running next-20140508 kernel on imx6q-sabresd board with USB
mouse/keyboard connected to OTG port. It works well on 3.15-rc but
is broken on recent linux-next kernel with the message like below.
usb 1-1: device v413c p2107 is not supported
hub 1-0:1.0: unable to enumerate USB device on port 1
With the help from Peter, I found that the issue shows up only when
CONFIG_USB_OTG_FSM is enabled. The option is enabled by commit 8fd2f1f
(ARM: imx_v6_v7_defconfig: Enable drivers for i.MX51 USB Host support.)
from IMX tree.
I guess this is a sign that chipidea otg_fsm driver is buggy? I do not
think dropping CONFIG_USB_OTG_FSM selection from imx_v6_v7_defconfig is
a solution, and we need to fix the issue in usb driver, right?
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