linux-kernel - Re: [PATCH 1/2] arm64: dts: qcom: lemans-evk: Enable GPIO expander3 interrupt for Lemans EVK

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Message-ID: <93c81950-e679-4c2f-b0f7-c94be471a1df@oss.qualcomm.com>
Date: Fri, 6 Feb 2026 13:24:44 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Swati Agarwal <swati.agarwal@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: qcom: lemans-evk: Enable GPIO expander3
 interrupt for Lemans EVK

On 2/6/26 1:12 PM, Dmitry Baryshkov wrote:
> On Fri, Feb 06, 2026 at 04:16:41PM +0530, Swati Agarwal wrote:
>> Enable PCA9538 expander3 as interrupt controller on Lemans EVK and
>> configures the corresponding TLMM pins via pinctrl to operate as GPIO
>> inputs with internal pull-ups.
>>
>> Signed-off-by: Swati Agarwal <swati.agarwal@....qualcomm.com>
>> ---
>>  arch/arm64/boot/dts/qcom/lemans-evk.dts | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts
>> index a549f7fe53a1..473cc2a81670 100644
>> --- a/arch/arm64/boot/dts/qcom/lemans-evk.dts
>> +++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts
>> @@ -649,6 +649,12 @@ expander3: gpio@3b {
>>  		reg = <0x3b>;
>>  		#gpio-cells = <2>;
>>  		gpio-controller;
>> +		#interrupt-cells = <2>;
>> +		interrupt-controller;
>> +		interrupt-parent = <&tlmm>;
>> +		interrupts = <39 IRQ_TYPE_LEVEL_LOW>;
> 
> interrupts-extended, please.

I think interrupt-parent makes sense for a child that's also an
interrupt provider, IDK if interrupt-extended maintains the
topology

Konrad