Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH 2/2] arm64: dts: exynos: add OF graph between USB-PHY
 and MUIC
To:     Krzysztof Kozlowski <krzk@kernel.org>
Cc:     "open list:DESIGNWARE USB3 DRD IP DRIVER" <linux-usb@vger.kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, Felipe Balbi <balbi@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Inki Dae <inki.dae@samsung.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org
From:   Andrzej Hajda <a.hajda@samsung.com>
Message-id: <6581962f-3552-2891-e6b3-b2f7c0018c93@samsung.com>
Date:   Thu, 01 Feb 2018 09:19:39 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
        Thunderbird/52.5.0
MIME-version: 1.0
In-reply-to: <CAJKOXPewrA38bxiCKa=pjhVKXys2KRstV2w=+MP3TVi9kkN1kw@mail.gmail.com>
Content-type: text/plain; charset="utf-8"
Content-transfer-encoding: 7bit
Content-language: en-US
CMS-TYPE: 201P
References: <CGME20180131155734eucas1p1c7988ce46f3164329a39d2358d9fada9@eucas1p1.samsung.com>
        <20180131155718.5237-1-a.hajda@samsung.com>
        <20180131155718.5237-3-a.hajda@samsung.com>
        <CAJKOXPewrA38bxiCKa=pjhVKXys2KRstV2w=+MP3TVi9kkN1kw@mail.gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 01.02.2018 08:50, Krzysztof Kozlowski wrote:
> On Wed, Jan 31, 2018 at 4:57 PM, Andrzej Hajda <a.hajda@samsung.com> wrote:
>> OF graph describes USB data lanes between USB-PHY and respective MUIC.
>> Since graph is present and DWC driver can use it to get extcon, obsolete
>> extcon property can be removed.
>>
>> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
>> ---
>>  arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi | 18 +++++++++++++++++-
>>  1 file changed, 17 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> index 427ff861b441..b20b42659206 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> @@ -828,6 +828,17 @@
>>                                         };
>>                                 };
>>                         };
>> +
>> +                       ports {
>> +                               #address-cells = <1>;
>> +                               #size-cells = <0>;
>> +
>> +                               port@0 {
>> +                                       reg = <0>;
>> +                                       muic_to_usb: endpoint {
>> +                                               remote-endpoint = <&usb_to_muic>;
>> +                                       };
>> +                               };
>>                         };
>>                 };
>>
>> @@ -1242,12 +1253,17 @@
>>
>>  &usbdrd_dwc3 {
>>         dr_mode = "otg";
>> -       extcon = <&muic>;
> Look ok for me.
>
> Does this depend on #1 patch for DWC?

Yes, it depends. #1 adds code to find extcon using graph, without it
dwc3 won't be able to work in dual-role mode.
Alternatively, I could split this patch into two parts:
2a. adding graph bindings.
2b. removing extcon property.
In such case only 2b depends on #1.

Regards
Andrzej

>
> Best regards,
> Krzysztof
>
>
>