linux-kernel - Re: [PATCH v2 2/2] dt-bindings: usb: rockchip,dwc3: Move RK3399 to its own schema

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Date:   Mon, 23 Jan 2023 15:07:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     Johan Jonker <jbx6244@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] dt-bindings: usb: rockchip,dwc3: Move RK3399 to
 its own schema

On Sat, Jan 21, 2023 at 12:40:12AM +0100, Johan Jonker wrote:
> 
> 
> On 1/20/23 21:30, Rob Herring wrote:
> > On Wed, Jan 18, 2023 at 3:05 PM Johan Jonker <jbx6244@...il.com> wrote:
> >>
> >> Hi,
> >>
> >> Some alignment at the examples and the unknown extcon property.
> >>
> >> usb@...00000: 'extcon' does not match any of the regexes
> > 
> > Does that go in the wrapper or dwc3 node?:
> > 
> > arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dtb: usb@...00000:
> > usb@...00000: Unevaluated properties are not allowed ('extcon' was
> > unexpected)
> >         From schema:
> > /home/rob/proj/linux-dt/Documentation/devicetree/bindings/usb/rockchip,rk3399-dwc3.yaml
> > 
> 
> 
> > That's the dwc3 node, but the majority are in the wrapper node, so I'm
> > going with the majority and leaving this one.
> 
> In wrapper code for rk33899 in dwc3-of-simple.c I don't see no extcon activity I think.

So all the other cases are just a stray property and the above one is 
correct.

'extcon' should be replaced in favor of a connector node, so if not 
used, it should be able to be removed. Though maybe BSD or something 
else cares.

> In core there's recently made some changes:
> https://github.com/torvalds/linux/blame/master/drivers/usb/dwc3/core.c#L1710
> 
> usb: dwc3: Don't switch OTG -> peripheral if extcon is present 
> https://lore.kernel.org/all/20221017233510.53336-1-andriy.shevchenko@linux.intel.com/
> 
> Binding status update for that is unknown for me.
> Do whatever suites you best.

I'm going to leave it as-is for now.

Rob