linux-kernel - Re: [RFT 09/10] arm64: dts: exynos: Correct port of USB-C connector node on Exynos5433 TM2

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Date:   Mon, 31 Aug 2020 14:50:25 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Lee Jones <lee.jones@...aro.org>,
        Sangbeom Kim <sbkim73@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        alsa-devel@...a-project.org
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Inki Dae <inki.dae@...sung.com>,
        Andrzej Hajda <a.hajda@...sung.com>
Subject: Re: [RFT 09/10] arm64: dts: exynos: Correct port of USB-C connector
 node on Exynos5433 TM2

Hi Krzysztof,

On 29.08.2020 16:25, Krzysztof Kozlowski wrote:
> The USB-C connector bindings require port@0.  Such port was already
> described in DTS but outside of the connector itself.  Put it into
> proper place to fix dtbs_check warnings like:
>
>    arch/arm64/boot/dts/exynos/exynos5433-tm2.dt.yaml: musb_connector: ports: 'port@0' is a required property
>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

I'm not sure if topic should be about USB-C, I will call it simply USB 
connector node. TM2(e) uses Samsung's 11-pin micro USB 2.0 connector, 
which has nothing in common with USB Type-C.

Anyway, this patch breaks DWC3 (tested in Device mode) driver operation, 
so something has to be somehow adjusted or fixed. Added CC Andrzej 
Hajda, who actually worked on this.

> ---
>
> Not tested on HQ. Please kindly review and test.
>
> Best regards,
> Krzysztof
> ---
>   .../boot/dts/exynos/exynos5433-tm2-common.dtsi    | 15 +++++++--------
>   1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> index 6246cce2a15e..bab6c1addd5f 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> @@ -871,6 +871,13 @@
>   					#address-cells = <1>;
>   					#size-cells = <0>;
>   
> +					port@0 {
> +						reg = <0>;
> +						muic_to_usb: endpoint {
> +							remote-endpoint = <&usb_to_muic>;
> +						};
> +					};
> +
>   					port@3 {
>   						reg = <3>;
>   						musb_con_to_mhl: endpoint {
> @@ -879,14 +886,6 @@
>   					};
>   				};
>   			};
> -
> -			ports {
> -				port {
> -					muic_to_usb: endpoint {
> -						remote-endpoint = <&usb_to_muic>;
> -					};
> -				};
> -			};
>   		};
>   
>   		regulators {

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland