On Fri, Jun 17, 2016 at 5:09 AM, Peter Chen <peter.chen@xxxxxxx> wrote: > Add binding doc for generic usb power sequence driver, and update > generic usb device binding-doc accordingly. > > Signed-off-by: Peter Chen <peter.chen@xxxxxxx> > --- > .../bindings/power/pwrseq/pwrseq-usb-generic.txt | 31 ++++++++++++++++++++++ > .../devicetree/bindings/usb/usb-device.txt | 2 ++ > 2 files changed, 33 insertions(+) > create mode 100644 Documentation/devicetree/bindings/power/pwrseq/pwrseq-usb-generic.txt > > diff --git a/Documentation/devicetree/bindings/power/pwrseq/pwrseq-usb-generic.txt b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-usb-generic.txt > new file mode 100644 > index 0000000..8ad98382 > --- /dev/null > +++ b/Documentation/devicetree/bindings/power/pwrseq/pwrseq-usb-generic.txt > @@ -0,0 +1,31 @@ > +The power sequence for generic USB Devices > + > +Some hard-wired USB devices need to do power sequence to let the > +device work normally, the typical power sequence like: enable USB > +PHY clock, toggle reset pin, etc. But current Linux USB driver > +lacks of such code to do it, it may cause some hard-wired USB devices > +works abnormal or can't be recognized by controller at all. The > +power sequence will be done before this device can be found at USB > +bus. > + > +Required properties: > +- compatible : contains "usb-pwrseq-generic". In case I have not been clear, no. I am not going to accept anything along the lines of the current mmc pwrseq. I am basically okay with Krzysztof's proposal as it is *only* an added property and not a duplication of information. I'd suggest you figure out how to make the kernel work with that rather than trying to work-around whatever kernel limitations there are. Rob -- 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
