linux-kernel - [PATCH v2 1/4] arm64: dts: ti: j722s-evm: Add DT nodes for power regulators

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Message-ID: <20250508155134.2026300-2-y-abhilashchandra@ti.com>
Date: Thu, 8 May 2025 21:21:31 +0530
From: Yemike Abhilash Chandra <y-abhilashchandra@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <vaishnav.a@...com>, <u-kumar1@...com>, <r-donadkar@...com>,
        <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <jai.luthra@...ux.dev>, <linux-kernel@...r.kernel.org>,
        <y-abhilashchandra@...com>
Subject: [PATCH v2 1/4] arm64: dts: ti: j722s-evm: Add DT nodes for power regulators

Add device tree nodes for two regulators on the J722S-EVM. VSYS_3V3 is the
output of LM5141-Q1, and it serves as an input to TPS22990 which produces
VSYS_3V3_EXP [1]. VSYS_3V3_EXP serves as vin-supply to CSI RPI Connectors.

Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@...com>

[1]: https://www.ti.com/lit/zip/sprr495
---
 arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
index 34b9d190800e..0f18fe710929 100644
--- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
@@ -141,6 +141,17 @@ vsys_5v0: regulator-vsys5v0 {
 		regulator-boot-on;
 	};
 
+	vsys_3v3: regulator-vsys3v3 {
+		/* output of LM5141-Q1 */
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vmain_pd>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
 	vdd_mmc1: regulator-mmc1 {
 		/* TPS22918DBVR */
 		compatible = "regulator-fixed";
@@ -153,6 +164,17 @@ vdd_mmc1: regulator-mmc1 {
 		bootph-all;
 	};
 
+	vcc_3v3_exp: regulator-TPS22990 {
+		/* output of TPS22990 */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_3v3_exp";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vsys_3v3>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
 	vdd_sd_dv: regulator-TLV71033 {
 		compatible = "regulator-gpio";
 		regulator-name = "tlv71033";
-- 
2.34.1