linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am62a7-sk: Enable dual role support for Type-C port

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Message-ID: <dd800ec2-684a-d6fc-2fb3-d146b95a8370@kernel.org>
Date:   Tue, 25 Jul 2023 10:43:06 +0300
From:   Roger Quadros <rogerq@...nel.org>
To:     Ravi Gunasekaran <r-gunasekaran@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        nm@...com, vigneshr@...com, kristo@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "heikki.krogerus@...ux.intel.com" <heikki.krogerus@...ux.intel.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: ti: k3-am62a7-sk: Enable dual role support
 for Type-C port



On 25/07/2023 07:19, Ravi Gunasekaran wrote:
> 
> 
> On 7/24/2023 7:27 PM, Krzysztof Kozlowski wrote:
>> On 24/07/2023 13:51, Ravi Gunasekaran wrote:
>>> USB0 is interfaced with a Type-C DRP connector and is managed via a
>>> USB PD controller. Add support for the Type-C port with dual data
>>> and power sink role.
>>>
>>> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
>>> ---
>>>  arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 33 +++++++++++++++++++++++++
>>>  1 file changed, 33 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
>>> index d2cca6182738..b478b794de00 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
>>> +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
>>> @@ -226,6 +226,24 @@
>>>  	pinctrl-names = "default";
>>>  	pinctrl-0 = <&main_i2c0_pins_default>;
>>>  	clock-frequency = <400000>;
>>> +
>>> +	typec_pd0:tps6598x@3f {
> 
> Thanks for reviewing the patch.
> 
>> Missing space after:
> 
> I will fix this in v2.
> 
>>
>> Node names should be generic. See also an explanation and list of
>> examples (not exhaustive) in DT specification:
>> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
> 
> Thanks for pointing to the section. I checked it and also few other node names
> in the existing DTs.
> TPS6598 is a USB Type C and Power Delivery Controller. So does a node name
> "type-c-pd-controller" sound fine?

Type-c is irrelevant in node name.
The name needs to indicate it has something to do with USB, Power Control and Role control.

e.g.
usb-power-controller
or
usb-role-controller
?

> 
>>
>> Best regards,
>> Krzysztof
>>
> 
> Regards,
> Ravi

-- 
cheers,
-roger