Hi, On Fri, Mar 02, 2018 at 12:47:07AM +0100, Merlijn Wajer wrote: > Hi, > > I found that the "mode" file in musb sys node will return "(null)" when > one would expect it show b_idle. > > Wrong /mode file: > > [Fresh boot, cable not connected yet] > root@n900devuan:~# modprobe g_nokia > [Insert cable connected to PC] > root@n900devuan:~# cat > /sys/devices/platform/68000000.ocp/480ab000.usb_otg_hs/musb-hdrc.0.auto/mode > b_peripheral > [Remove cable connected to PC] > root@n900devuan:~# cat > /sys/devices/platform/68000000.ocp/480ab000.usb_otg_hs/musb-hdrc.0.auto/mode > b_idle > root@n900devuan:~# rmmod g_nokia > root@n900devuan:~# cat > /sys/devices/platform/68000000.ocp/480ab000.usb_otg_hs/musb-hdrc.0.auto/mode > (null)
I can reproduce this on AM335x EVM, > [Insert cable connected to PC] > root@n900devuan:~# cat > /sys/devices/platform/68000000.ocp/480ab000.usb_otg_hs/musb-hdrc.0.auto/mode > b_idle but not this, I still get (null). g_nokia is not loaded here, right? > > I would expect it to state "b_idle" instead of "(null)". Actually, I'd like to see (null) whenever a gadget driver is not loaded, which indicates a gadget is not bound to the udc. Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
