linux-kernel - [PATCH 1/4] arm64: dts: ti: k3-am64-tqma64xxl: add supply regulator for I2C devices

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Date:   Thu, 28 Sep 2023 13:45:10 +0200
From:   Matthias Schiffer <matthias.schiffer@...tq-group.com>
To:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...tq-group.com,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH 1/4] arm64: dts: ti: k3-am64-tqma64xxl: add supply regulator for I2C devices

Describes the hardware better, and avoids a few warnings during boot:

    lm75 0-004a: supply vs not found, using dummy regulator
    at24 0-0050: supply vcc not found, using dummy regulator
    at24 0-0054: supply vcc not found, using dummy regulator

Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
---
 arch/arm64/boot/dts/ti/k3-am642-tqma64xxl.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl.dtsi b/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl.dtsi
index 6229849b5d968..d82d4a98306a7 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl.dtsi
@@ -85,6 +85,15 @@ rtos_ipc_memory_region: ipc-memories@...00000 {
 			no-map;
 		};
 	};
+
+	reg_1v8: regulator-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "V_1V8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
 };
 
 &main_i2c0 {
@@ -96,11 +105,13 @@ &main_i2c0 {
 	tmp1075: temperature-sensor@4a {
 		compatible = "ti,tmp1075";
 		reg = <0x4a>;
+		vs-supply = <&reg_1v8>;
 	};
 
 	eeprom0: eeprom@50 {
 		compatible = "st,24c02", "atmel,24c02";
 		reg = <0x50>;
+		vcc-supply = <&reg_1v8>;
 		pagesize = <16>;
 		read-only;
 	};
@@ -114,6 +125,7 @@ pcf85063: rtc@51 {
 	eeprom1: eeprom@54 {
 		compatible = "st,24c64", "atmel,24c64";
 		reg = <0x54>;
+		vcc-supply = <&reg_1v8>;
 		pagesize = <32>;
 	};
 };
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