linux-kernel - Re: [PATCH v7 8/9] arm64: dts: qcom: sa8295p: Enable tertiary controller and its 4 USB ports

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Message-ID: <ce92c0b0-adb1-ffe0-e812-6b4532209c81@linaro.org>
Date:   Thu, 4 May 2023 08:37:49 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        quic_pkondeti@...cinc.com, quic_ppratap@...cinc.com,
        quic_jackp@...cinc.com, quic_harshq@...cinc.com,
        ahalaney@...hat.com, quic_shazhuss@...cinc.com
Subject: Re: [PATCH v7 8/9] arm64: dts: qcom: sa8295p: Enable tertiary
 controller and its 4 USB ports



On 3.05.2023 05:55, Krishna Kurapati PSSNV wrote:
> 
> 
> On 5/2/2023 4:36 PM, Konrad Dybcio wrote:
>>
>>
>> On 1.05.2023 16:34, Krishna Kurapati wrote:
>>> Enable tertiary controller for SA8295P (based on SC8280XP).
>>> Add pinctrl support for usb ports to provide VBUS to connected peripherals.
>>>
>>> Signed-off-by: Krishna Kurapati <quic_kriskura@...cinc.com>
>>> ---
>>>   arch/arm64/boot/dts/qcom/sa8295p-adp.dts | 47 ++++++++++++++++++++++++
>>>   1 file changed, 47 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sa8295p-adp.dts b/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
>>> index fd253942e5e5..7e6061c43835 100644
>>> --- a/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
>>> +++ b/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
>>> @@ -584,6 +584,19 @@ &usb_1_qmpphy {
>>>       status = "okay";
>>>   };
>>>   +&usb_2 {
>>> +    pinctrl-names = "default";
>>> +    pinctrl-0 = <&usb2_en_state>,
>>> +            <&usb3_en_state>,
>>> +            <&usb4_en_state>,
>>> +            <&usb5_en_state>;
>> This is misaligned. Also, please do property-n before property-names.
>>
>>> +    status = "okay";
>>> +};
>>> +
>>> +&usb_2_dwc3 {
>>> +    dr_mode = "host";
>>> +};
>>> +
>>>   &usb_2_hsphy0 {
>>>       vdda-pll-supply = <&vreg_l5a>;
>>>       vdda18-supply = <&vreg_l7g>;
>>> @@ -729,3 +742,37 @@ wake-n-pins {
>>>           };
>>>       };
>>>   };
>>> +
>>> +&pmm8540c_gpios {
>>> +    usb2_en_state: usb2-en-state {
>>> +        pins = "gpio9";
>>> +        function = "normal";
>>> +        output-high;
>>> +        power-source = <0>;
>> No drive-strength values?
>>
>> Konrad
> 
> Hi Konrad,
> 
>  TBH, I didn't add the drive strength values as things worked out of the box with the current changes (may be the default value of drive strength is sufficient for us).
> 
> Let me know if it is mandatory, I will add it up in the next version.
It's not, but it helps eliminate one more potential inconsistency

Konrad
> 
> Regards,
> Krishna,
> 
>>> +    };
>>> +};
>>> +
>>> +&pmm8540e_gpios {
>>> +    usb3_en_state: usb3-en-state {
>>> +        pins = "gpio5";
>>> +        function = "normal";
>>> +        output-high;
>>> +        power-source = <0>;
>>> +    };
>>> +};
>>> +
>>> +&pmm8540g_gpios {
>>> +    usb4_en_state: usb4-en-state {
>>> +        pins = "gpio5";
>>> +        function = "normal";
>>> +        output-high;
>>> +        power-source = <0>;
>>> +    };
>>> +
>>> +    usb5_en_state: usb5-en-state {
>>> +        pins = "gpio9";
>>> +        function = "normal";
>>> +        output-high;
>>> +        power-source = <0>;
>>> +    };
>>> +};