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

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Date:   Wed, 3 May 2023 09:25:07 +0530
From:   Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        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 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.

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>;
>> +	};
>> +};