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 <b47...@freescale.com> > --- > .../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 <b47...@freescale.com> > +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". > + > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop > +Date: Feb 2014 > +Contact: Li Jun <b47...@freescale.com> > +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. > + > +What: /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_drop > +Date: Feb 2014 > +Contact: Li Jun <b47...@freescale.com> > +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 <b47...@freescale.com> > +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. > -- Best Regards, Peter Chen -- 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
