On Thu, Mar 06, 2014 at 12:54:28PM +0800, Peter Chen wrote: > On Thu, Feb 27, 2014 at 07:38:31AM +0800, Li Jun wrote: > > This patch adds sysfs interface description for chipidea USB OTG role switch > > in HNP. > > > > Signed-off-by: Li Jun <b47624@xxxxxxxxxxxxx> > > --- > > .../ABI/testing/sysfs-platform-chipidea-usb-otg | 55 ++++++++++++++++++++ > > 1 file changed, 55 insertions(+) > > > > diff --git a/Documentation/ABI/testing/sysfs-platform-chipidea-usb-otg b/Documentation/ABI/testing/sysfs-platform-chipidea-usb-otg > > new file mode 100644 > > index 0000000..a05414c > > --- /dev/null > > +++ b/Documentation/ABI/testing/sysfs-platform-chipidea-usb-otg > > @@ -0,0 +1,55 @@ > > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req > > +Date: Feb 2014 > > +Contact: Li Jun <b47624@xxxxxxxxxxxxx> > > +Description: > > + Can be set and read. > > + Set a_bus_req(A-device bus request) input to be 1 if > > + the Application running on the A-device wants to use the bus, > > + and to be 0 when the Application no longer wants to use > > + the bus(or wants to work as peripheral). a_bus_req can also > > + be set to 1 by kernel in response to remote wakeup signaling > > + from the B-device, the A-device should decide to resume the bus. > > + > > + Valid values are "1" and "0". > > + > > + Reading: returns if the Application running on the A-device > > + is using the bus as host role. > > return what if the Application? Besides, if there is no special meaning, > we'd better use lower-case for "Application". > I will add more detailed description, which return value for when, thanks! > > + > > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop > > +Date: Feb 2014 > > +Contact: Li Jun <b47624@xxxxxxxxxxxxx> > > +Description: > > + Can be set and read > > + The a_bus_drop(A-device bus drop) input is 1 when the > > + Application running on the A-device wants to power down > > + the bus, and is 0 otherwise, When a_bus_drop is 1, then > > + the a_bus_req shall be 0. > > + > > + Valid values are "1" and "0". > > + > > + Reading: returns if the bus is off(vbus is turned off). > > The same question like above. > Same update in next version. > > + > > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_drop > > +Date: Feb 2014 > > +Contact: Li Jun <b47624@xxxxxxxxxxxxx> > > +Description: > > + Can be set and read. > > + The b_bus_req(B-device bus request) input is 1 during the time > > + that the Application running on the B-device wants to use the > > + bus as host, and is 0 when the Application no longer wants to > > + work as host and decides to switch back to be peripheral. > > + > > + Valid values are "1" and "0". > > + > > + Reading: returns if the Application running on the B device > > + is using the bus as host role. > > + > > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_clr_err > > +Date: Feb 2014 > > +Contact: Li Jun <b47624@xxxxxxxxxxxxx> > > +Description: > > + Only can be set. > > + The a_clr_err(A-device Vbus error clear) input is used to clear > > + vbus error, then A device will power down the bus. > > + > > + Valid value is "1" > > -- > > The same question like above. > This is a write only variable, not the same as above. > > > > -- > > 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
