Re: [PATCH 3/3] ARM: dts: colibri-imx7: add usb dual-role switch capability

[Philippe Schenker]

On Mon, 2020-07-13 at 11:46 +0200, Ahmad Fatoum wrote:
> Hello Philippe,
> 
> On 7/10/20 3:24 PM, Philippe Schenker wrote:
> > Since the runtime-pm wakeup bug was fixed in
> > drivers/usb/chipidea/core.c usb dual-role host/device switching is
> > working. So make use of it.
> > 
> > Signed-off-by: Philippe Schenker <philippe.schenker@xxxxxxxxxxx>
> > 
> > ---
> > 
> >  arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi | 9 +++++++++
> >  arch/arm/boot/dts/imx7-colibri.dtsi         | 4 ++--
> >  2 files changed, 11 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
> > b/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
> > index 97601375f264..db56a532a34a 100644
> > --- a/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
> > +++ b/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi
> > @@ -20,6 +20,14 @@ clk16m: clk16m {
> >  		clock-frequency = <16000000>;
> >  	};
> >  
> > +	extcon_usbc_det: usbc_det {
> > +		compatible = "linux,extcon-usb-gpio";
> 
> According to 4602f3bff266 ("usb: common: add USB GPIO based connection
> detection driver"):
> "the old way using extcon to support USB Dual-Role switch is now
> deprecated
>  when use Type-B connector."
> 
> Have you considered using a compatible = "gpio-usb-b-connector" child
> node instead?
> 
> Cheers,
> Ahmad

Thanks for the Hint Ahmad,

I already tried and just now tried again but it doesn't work on our
hardware. Are you sure this works with chipidea driver?

Should this new usb-connector stuff work in general with every old
driver?

Philippe

> 
> > +		id-gpio = <&gpio7 14 GPIO_ACTIVE_HIGH>;
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&pinctrl_usbc_det>;
> > +	};
> > +
> > +
> >  	gpio-keys {
> >  		compatible = "gpio-keys";
> >  		pinctrl-names = "default";
> > @@ -174,6 +182,7 @@ &uart3 {
> >  };
> >  
> >  &usbotg1 {
> > +	extcon = <0>, <&extcon_usbc_det>;
> >  	status = "okay";
> >  };
> >  
> > diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi
> > b/arch/arm/boot/dts/imx7-colibri.dtsi
> > index e18e89dec879..caea90d2421f 100644
> > --- a/arch/arm/boot/dts/imx7-colibri.dtsi
> > +++ b/arch/arm/boot/dts/imx7-colibri.dtsi
> > @@ -457,7 +457,7 @@ &uart3 {
> >  };
> >  
> >  &usbotg1 {
> > -	dr_mode = "host";
> > +	dr_mode = "otg";
> >  };
> >  
> >  &usdhc1 {
> > @@ -486,7 +486,7 @@ &usdhc3 {
> >  &iomuxc {
> >  	pinctrl-names = "default";
> >  	pinctrl-0 = <&pinctrl_gpio1 &pinctrl_gpio2 &pinctrl_gpio3
> > &pinctrl_gpio4
> > -		     &pinctrl_gpio7 &pinctrl_usbc_det>;
> > +		     &pinctrl_gpio7>;
> >  
> >  	pinctrl_gpio1: gpio1-grp {
> >  		fsl,pins = <
> >