linux-kernel - Re: [PATCH v2 03/13] arm64: dts: qcom: lemans-evk: Add TCA9534 I/O expander

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Message-ID: <bbf6ffac-67ee-4f9d-8c59-3d9a4a85a7cc@oss.qualcomm.com>
Date: Wed, 3 Sep 2025 17:48:56 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Wasim Nazir <wasim.nazir@....qualcomm.com>,
        Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Richard Cochran <richardcochran@...il.com>
Cc: kernel@....qualcomm.com, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, netdev@...r.kernel.org,
        Nirmesh Kumar Singh <quic_nkumarsi@...cinc.com>
Subject: Re: [PATCH v2 03/13] arm64: dts: qcom: lemans-evk: Add TCA9534 I/O
 expander

On 9/3/25 1:47 PM, Wasim Nazir wrote:
> From: Nirmesh Kumar Singh <quic_nkumarsi@...cinc.com>
> 
> Integrate the TCA9534 I/O expander via I2C to provide 8 additional
> GPIO lines for extended I/O functionality.
> 
> Signed-off-by: Nirmesh Kumar Singh <quic_nkumarsi@...cinc.com>
> Signed-off-by: Wasim Nazir <wasim.nazir@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/lemans-evk.dts | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts
> index 9e415012140b..753c5afc3342 100644
> --- a/arch/arm64/boot/dts/qcom/lemans-evk.dts
> +++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts
> @@ -277,6 +277,38 @@ vreg_l8e: ldo8 {
>  	};
>  };
>  
> +&i2c18 {
> +	status = "okay";
> +
> +	expander0: gpio@38 {
> +		compatible = "ti,tca9538";
> +		#gpio-cells = <2>;
> +		gpio-controller;
> +		reg = <0x38>;

'reg' usually comes right after compatible

Konrad