Hi Jun, On Mon, 2019-03-11 at 06:06 +0000, Jun Li wrote: > > > -----Original Message----- > > From: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> > > Sent: 2019年3月11日 13:33 > > To: Hans de Goede <hdegoede@xxxxxxxxxx> > > Cc: Rob Herring <robh+dt@xxxxxxxxxx>; Greg Kroah-Hartman > > <gregkh@xxxxxxxxxxxxxxxxxxx>; Heikki Krogerus > > <heikki.krogerus@xxxxxxxxxxxxxxx>; Mark Rutland <mark.rutland@xxxxxxx>; > > Matthias Brugger <matthias.bgg@xxxxxxxxx>; Adam Thomson > > <Adam.Thomson.Opensource@xxxxxxxxxxx>; Jun Li <jun.li@xxxxxxx>; Badhri > > Jagan Sridharan <badhri@xxxxxxxxxx>; Andy Shevchenko > > <andy.shevchenko@xxxxxxxxx>; Min Guo <min.guo@xxxxxxxxxxxx>; > > devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > > linux-usb@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; > > linux-mediatek@xxxxxxxxxxxxxxxxxxx > > Subject: Re: [PATCH 1/5] dt-bindings: connector: add optional properties for > > Type-B > > > > Hi, > > > > On Fri, 2019-03-08 at 13:07 +0100, Hans de Goede wrote: > > > Hi, > > > > > > On 08-03-19 07:13, Chunfeng Yun wrote: > > > > Add id-gpios, vbus-gpios, vbus-supply and pinctrl properties for > > > > usb-b-connector > > > > > > > > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> > > > > --- > > > > .../devicetree/bindings/connector/usb-connector.txt | 10 ++++++++++ > > > > 1 file changed, 10 insertions(+) > > > > > > > > diff --git > > > > a/Documentation/devicetree/bindings/connector/usb-connector.txt > > > > b/Documentation/devicetree/bindings/connector/usb-connector.txt > > > > index a9a2f2fc44f2..7a07b0f4f973 100644 > > > > --- a/Documentation/devicetree/bindings/connector/usb-connector.txt > > > > +++ b/Documentation/devicetree/bindings/connector/usb-connector.txt > > > > @@ -17,6 +17,16 @@ Optional properties: > > > > - self-powered: Set this property if the usb device that has its own power > > > > source. > > > > > > > > +Optional properties for usb-b-connector: > > > > +- id-gpios: gpio for USB ID pin. > > > > > > What about boards where the ID pin is *not* connected to a GPIO, but > > > e.g. to a special pin on the PMIC which can also detect an ACA adapter > > > ? Currently this case is handled by extcon drivers, but we have no way > > > to set e.g. vbus-supply for the connector. Maybe in this case the > > > usb-connector node should be a child of the PMIC node ? > > Yes, it would be, PMIC is in charger of detecting the status of ID pin > > > > > > And in many cases there also is a mux to switch the datalines between > > > the host and device(gadget) controllers, how should that be described > > > in this model? See the new usb-role-switch code under > > > drivers/usb/roles > > > > > > In some cases the mux is controlled through a gpio, so we may want to > > > add a "mux-gpios" here in which case we also need to define what 0/1 > > > means. > > I'm not sure, the mux seems not belong to this connector, and may need another > > driver to register usb-role-switch, similar to: > > > > [v2,2/2] usb: typec: add typec switch via GPIO control > > https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork > > .kernel.org%2Fpatch%2F10834327%2F&data=02%7C01%7Cjun.li%40nxp.co > > m%7C963df62e15ed4bedb14d08d6a5e30de2%7C686ea1d3bc2b4c6fa92cd99c5 > > c301635%7C0%7C0%7C636878791953122760&sdata=grPIs2MbdaarTa17dr > > pASVkGpyW7TAexB24igOJopGU%3D&reserved=0 > > > > No, this is not for usb role switch, this is a typec switch driver to select the super speed > active channel by orientation(CC1/CC2). Got it, it's just an analogy:) > > Li Jun > > > > > > > > > +- vbus-gpios: gpio for USB VBUS pin. > > > > + see gpio/gpio.txt. > > > > +- vbus-supply: reference to the VBUS regulator, needed when > > > > +supports > > > > + dual-role mode. > > > > > > I think this needs some text that there can be either a vbus-gpio or a > > > vbus-supply. Oh wait reading: > > > > > > https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpat > > > > > chwork.kernel.org%2Fpatch%2F10819377%2F&data=02%7C01%7Cjun.li%4 > > 0nx > > > > > p.com%7C963df62e15ed4bedb14d08d6a5e30de2%7C686ea1d3bc2b4c6fa92cd9 > > 9c5c3 > > > > > 01635%7C0%7C0%7C636878791953122760&sdata=Judz7gdwQTOC7Jh84 > > 57N4x21a > > > fWci%2FEH79ARqWZzbX8%3D&reserved=0 > > > > > > I see that this GPIO is for detecting vbus presence, not for > > > driving/enabling 5v to Vbus from the board, that needs to be described more > > clearly. > > Ok > > > > Thanks a lot > > > > > > > +- pinctrl-names : a pinctrl state named "default" is optional > > > > +- pinctrl-0 : pin control group > > > > + see pinctrl/pinctrl-bindings.txt > > > > + > > > > Optional properties for usb-c-connector: > > > > - power-role: should be one of "source", "sink" or "dual"(DRP) if typec > > > > connector has power support. > > > > > > > > > > > > > Regards, > > > > > > Hans > > >
