Re: [PATCH v2 1/7] dt-bindings: usb: ti,j721e-usb: add ti,j7200-usb compatible

From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: "Théo Lebrun" <theo.lebrun@bootlin.com>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Roger Quadros" <rogerq@kernel.org>,
	"Peter Chen" <peter.chen@kernel.org>,
	"Pawel Laszczak" <pawell@cadence.com>,
	"Nishanth Menon" <nm@ti.com>,
	"Vignesh Raghavendra" <vigneshr@ti.com>,
	"Tero Kristo" <kristo@kernel.org>
Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	"Grégory Clement" <gregory.clement@bootlin.com>,
	"Conor Dooley" <conor.dooley@microchip.com>
Subject: Re: [PATCH v2 1/7] dt-bindings: usb: ti,j721e-usb: add ti,j7200-usb compatible
Date: Mon, 20 Nov 2023 18:32:07 +0100	[thread overview]
Message-ID: <6f0da181-717c-4b14-ba3f-d287efe4105b@linaro.org> (raw)
In-Reply-To: <20231120-j7200-usb-suspend-v2-1-038c7e4a3df4@bootlin.com>

On 20/11/2023 18:06, Théo Lebrun wrote:
> On this platform, the controller & its wrapper are reset on resume. This
> makes it have a different behavior from other platforms.
> 
> We allow using the new compatible with a fallback onto the original
> ti,j721e-usb compatible. We therefore allow using an older kernel with

Where is fallback ti,j721e-usb used? Please point me to the code.

> a more recent devicetree.
> 
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
> ---
>  Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml b/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
> index 95ff9791baea..69a222dfd9ff 100644
> --- a/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
> +++ b/Documentation/devicetree/bindings/usb/ti,j721e-usb.yaml
> @@ -12,11 +12,15 @@ maintainers:
>  properties:
>    compatible:
>      oneOf:
> +      - const: ti,j7200-usb
>        - const: ti,j721e-usb
>        - const: ti,am64-usb
>        - items:
>            - const: ti,j721e-usb
>            - const: ti,am64-usb
> +      - items:
> +          - const: ti,j721e-usb

This makes little sense. It's already on the list. Twice! Don't add it
third time.

I am sorry, but this binding makes no sense. I mean, existing binding
makes no sense, but your change is not making it anyhow better.

Best regards,
Krzysztof