linux-kernel - [PATCH 4/4] arm64: dts: broadcom: Enable RP1 ADC for RPi5

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Message-ID: <20250925000416.2408457-5-svarbanov@suse.de>
Date: Thu, 25 Sep 2025 03:04:16 +0300
From: Stanimir Varbanov <svarbanov@...e.de>
To: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rpi-kernel@...ts.infradead.org,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	linux-hwmon@...r.kernel.org
Cc: Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Rob Herring <robh@...nel.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Andrew Lunn <andrew@...n.ch>,
	Stefan Wahren <wahrenst@....net>,
	Saenz Julienne <nsaenz@...nel.org>,
	Andrea della Porta <andrea.porta@...e.com>,
	Phil Elwell <phil@...pberrypi.com>,
	Jonathan Bell <jonathan@...pberrypi.com>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Stanimir Varbanov <svarbanov@...e.de>
Subject: [PATCH 4/4] arm64: dts: broadcom: Enable RP1 ADC for RPi5

Enable RP1 ADC for Raspberry Pi 5.

Signed-off-by: Stanimir Varbanov <svarbanov@...e.de>
---
 arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-ovl-rp1.dts | 8 ++++++++
 arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts         | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-ovl-rp1.dts b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-ovl-rp1.dts
index 6ea3c102e0d6..7943ec3fd6ea 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-ovl-rp1.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-ovl-rp1.dts
@@ -51,6 +51,14 @@ sd_vcc_reg: sd-vcc-reg {
 		enable-active-high;
 		gpios = <&gio_aon 4 GPIO_ACTIVE_HIGH>;
 	};
+
+	rp1_vdd_3v3: rp1_vdd_3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
 };
 
 /* The Debug UART, on Rpi5 it's on JST-SH 1.0mm 3-pin connector
diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts
index c70d1cb7f3b6..cb75792b659a 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts
@@ -24,6 +24,11 @@ &pcie2 {
 	status = "okay";
 };
 
+&rp1_adc {
+	vref-supply = <&rp1_vdd_3v3>;
+	status = "okay";
+};
+
 &rp1_eth {
 	status = "okay";
 	phy-mode = "rgmii-id";
-- 
2.47.0