linux-kernel - Re: [PATCH] arm64: dts: qcom: qdu1000: Add reserved gpio list

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Message-ID: <422ffe93-e390-7379-70ad-e56f73e1da44@quicinc.com>
Date:   Tue, 4 Jul 2023 17:26:18 +0530
From:   Komal Bajaj <quic_kbajaj@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: qdu1000: Add reserved gpio list



On 7/4/2023 4:38 PM, Konrad Dybcio wrote:
> On 4.07.2023 12:22, Komal Bajaj wrote:
>> Add reserved gpio list for QDU1000 and QRU1000 SoCs
>> which will not be used by HLOS.
>>
>> Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
>> ---
> Generally such changes to board files are split into per-board
> commits.

Sure, will split into per-board commits.

>
> Can you explain why these GPIOs will be inaccessible? Some secure
> I2C peripheral, I'd guess?

These GPIOs are needed by Modem subsystem.

Thanks
Komal

>
> Konrad
>>   arch/arm64/boot/dts/qcom/qdu1000-idp.dts | 4 ++++
>>   arch/arm64/boot/dts/qcom/qru1000-idp.dts | 4 ++++
>>   2 files changed, 8 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/qdu1000-idp.dts b/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> index 1d22f87fd238..0496e87ddfd5 100644
>> --- a/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> +++ b/arch/arm64/boot/dts/qcom/qdu1000-idp.dts
>> @@ -471,6 +471,10 @@ &sdhc {
>>   	status = "okay";
>>   };
>>   
>> +&tlmm {
>> +	gpio-reserved-ranges = <28 2>;
>> +};
>> +
>>   &uart7 {
>>   	status = "okay";
>>   };
>> diff --git a/arch/arm64/boot/dts/qcom/qru1000-idp.dts b/arch/arm64/boot/dts/qcom/qru1000-idp.dts
>> index 2cc893ae4d10..80dadd2f30a3 100644
>> --- a/arch/arm64/boot/dts/qcom/qru1000-idp.dts
>> +++ b/arch/arm64/boot/dts/qcom/qru1000-idp.dts
>> @@ -448,6 +448,10 @@ &qupv3_id_0 {
>>   	status = "okay";
>>   };
>>   
>> +&tlmm {
>> +	gpio-reserved-ranges = <28 2>;
>> +};
>> +
>>   &uart7 {
>>   	status = "okay";
>>   };