Hello Peter,
On 16-05-12 16:40:16, Peter Chen wrote:
> On Wed, May 11, 2016 at 06:11:36PM +0530, Sanchayan Maity wrote:
> > Use USBC_DET feature of standard Colibri SODIMM pin 137 for USB
> > device/host switching using the generic extcon USB gpio implementation.
> >
> > Signed-off-by: Sanchayan Maity <[email protected]>
> > ---
> > arch/arm/boot/dts/vf-colibri-eval-v3.dtsi | 12 ++++++++++++
> > arch/arm/boot/dts/vf-colibri.dtsi | 7 +++++++
> > 2 files changed, 19 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
> > b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
> > index a8a8e43..a012f80 100644
> > --- a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
> > +++ b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
> > @@ -50,6 +50,14 @@
> > clock-frequency = <16000000>;
> > };
> >
> > + extcon_usbc_det: usbc_det {
> > + compatible = "linux,extcon-usb-gpio";
> > + debounce = <25>;
> > + id-gpio = <&gpio3 6 GPIO_ACTIVE_HIGH>;
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_usbc_det>;
> > + };
> > +
> > panel: panel {
> > compatible = "edt,et057090dhu";
> > backlight = <&bl>;
> > @@ -162,6 +170,10 @@
> > status = "okay";
> > };
> >
> > +&usbdev0 {
> > + extcon = <&extcon_usbc_det>, <&extcon_usbc_det>;
> > +};
> > +
>
> I still not understand why vbus needs id-extcon too? Per my understand,
> this pin will not be changed between connects to pc and disconnects to
> pc.
While the ID extcon will take care of switching the role, without the
vbus gadget connect/disconnect being called appropriately as per the
current state, I have observed the client configuration to not work.
>From the descriptions of usb_gadget_vbus_connect/disconnect I understand
this to be required. Do I understand wrong?
- Sanchayan.
>
> > &usbh1 {
> > vbus-supply = <®_usbh_vbus>;
> > };
> > diff --git a/arch/arm/boot/dts/vf-colibri.dtsi
> > b/arch/arm/boot/dts/vf-colibri.dtsi
> > index b741709..a7a3e88 100644
> > --- a/arch/arm/boot/dts/vf-colibri.dtsi
> > +++ b/arch/arm/boot/dts/vf-colibri.dtsi
> > @@ -174,6 +174,7 @@
> >
> > &usbdev0 {
> > disable-over-current;
> > + dr_mode = "otg";
> > status = "okay";
> > };
> >
> > @@ -362,6 +363,12 @@
> > >;
> > };
> >
> > + pinctrl_usbc_det: gpio_usbc_det {
> > + fsl,pins = <
> > + VF610_PAD_PTC29__GPIO_102 0x22ed
> > + >;
> > + };
> > +
> > pinctrl_usbh1_reg: gpio_usb_vbus {
> > fsl,pins = <
> > VF610_PAD_PTD4__GPIO_83 0x22ed
> > --
> > 2.8.2
> >
> > --
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>
> --
>
> Best Regards,
> Peter Chen
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