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

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Message-ID: <aLhplc1XCWGNlnp4@hu-wasimn-hyd.qualcomm.com>
Date: Wed, 3 Sep 2025 21:45:17 +0530
From: Wasim Nazir <wasim.nazir@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: 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>, 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 Wed, Sep 03, 2025 at 05:48:56PM +0200, Konrad Dybcio wrote:
> 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
> 

Ack.

> Konrad

-- 
Regards,
Wasim