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

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Message-Id: <20250903-lemans-evk-bu-v2-3-bfa381bf8ba2@oss.qualcomm.com>
Date: Wed, 03 Sep 2025 17:17:04 +0530
From: Wasim Nazir <wasim.nazir@....qualcomm.com>
To: 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>,
        Wasim Nazir <wasim.nazir@....qualcomm.com>
Subject: [PATCH v2 03/13] arm64: dts: qcom: lemans-evk: Add TCA9534 I/O
 expander

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>;
+	};
+
+	expander1: gpio@39 {
+		compatible = "ti,tca9538";
+		#gpio-cells = <2>;
+		gpio-controller;
+		reg = <0x39>;
+	};
+
+	expander2: gpio@3a {
+		compatible = "ti,tca9538";
+		#gpio-cells = <2>;
+		gpio-controller;
+		reg = <0x3a>;
+	};
+
+	expander3: gpio@3b {
+		compatible = "ti,tca9538";
+		#gpio-cells = <2>;
+		gpio-controller;
+		reg = <0x3b>;
+	};
+};
+
 &mdss0 {
 	status = "okay";
 };

-- 
2.51.0