On Tue, Apr 28, 2015 at 11:56:27AM -0500, Felipe Balbi wrote: > On Thu, Mar 19, 2015 at 11:11:25AM +0800, Li Jun wrote: > > From: Li Jun <b47624@xxxxxxxxxxxxx> > > > > Update HNP test procedure as HNP polling is supported. > > > > Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx> > > --- > > Documentation/usb/chipidea.txt | 11 ++++++----- > > 1 file changed, 6 insertions(+), 5 deletions(-) > > > > diff --git a/Documentation/usb/chipidea.txt b/Documentation/usb/chipidea.txt > > index 3f848c1..ff965b2 100644 > > --- a/Documentation/usb/chipidea.txt > > +++ b/Documentation/usb/chipidea.txt > > @@ -26,16 +26,17 @@ cat /sys/kernel/debug/ci_hdrc.0/registers > > On B-device: > > echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req > > > > - if HNP polling is not supported, also need: > > - On A-device: > > - echo 0 > /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req > > - > > B-device should take host role and enumrate A-device. > > > > 4) A-device switch back to host. > > - On B-device: > > + on B-device: > > echo 0 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req > > > > + or, by introducing HNP polling, B-Host can know when A-peripheral wish to be > > + host role, so this role switch also can be trigged in A-peripheral side by > > + answering the polling from B-Host, this can be done on A-device: > > + echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req > > why is this still chipidea specific ? Why isn't this part on udc-core so > that all OTG UDCs can support this too ? > Currently, hnp polling is enabled during the otg fsm handling, but there is no otg framework (like udc core, Roger Quadros is doing that), so no common sys entry for otg fsm variables to control otg fsm. -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
