linux-kernel - [PATCH 6/7] arm64: dts: renesas: rzt2h/rzn2h-evk: enable ADCs

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Message-ID: <20250923160524.1096720-7-cosmin-gabriel.tanislav.xa@renesas.com>
Date: Tue, 23 Sep 2025 19:05:20 +0300
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
To: 
Cc: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	linux-iio@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: [PATCH 6/7] arm64: dts: renesas: rzt2h/rzn2h-evk: enable ADCs

The ADCs on RZ/T2H and RZ/N2H are exposed on the evaluation kit boards.

Enable them.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
---
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    | 28 +++++++
 .../dts/renesas/r9a09g087m44-rzn2h-evk.dts    | 64 +++++++++++++++
 .../dts/renesas/rzt2h-n2h-evk-common.dtsi     | 79 +++++++++++++++++++
 3 files changed, 171 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
index 9170c563208a..e94b84393bd9 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -252,3 +252,31 @@ usb_pins: usb-pins {
 			 <RZT2H_PORT_PINMUX(0, 1, 0x13)>; /* OVRCUR */
 	};
 };
+
+&adc2 {
+	status = "okay";
+
+	channel@0 {
+		reg = <0x0>;
+	};
+
+	channel@1 {
+		reg = <0x1>;
+	};
+
+	channel@2 {
+		reg = <0x2>;
+	};
+
+	channel@3 {
+		reg = <0x3>;
+	};
+
+	channel@4 {
+		reg = <0x4>;
+	};
+
+	channel@5 {
+		reg = <0x5>;
+	};
+};
diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index 279f2510044b..d27da157c6d6 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -305,3 +305,67 @@ usb_pins: usb-pins {
 			 <RZT2H_PORT_PINMUX(2, 3, 0x13)>; /* OVRCUR */
 	};
 };
+
+&adc2 {
+	status = "okay";
+
+	channel@0 {
+		reg = <0x0>;
+	};
+
+	channel@1 {
+		reg = <0x1>;
+	};
+
+	channel@2 {
+		reg = <0x2>;
+	};
+
+	channel@3 {
+		reg = <0x3>;
+	};
+
+	channel@4 {
+		reg = <0x4>;
+	};
+
+	channel@5 {
+		reg = <0x5>;
+	};
+
+	channel@6 {
+		reg = <0x6>;
+	};
+
+	channel@7 {
+		reg = <0x7>;
+	};
+
+	channel@8 {
+		reg = <0x8>;
+	};
+
+	channel@9 {
+		reg = <0x9>;
+	};
+
+	channel@a {
+		reg = <0xa>;
+	};
+
+	channel@b {
+		reg = <0xb>;
+	};
+
+	channel@c {
+		reg = <0xc>;
+	};
+
+	channel@d {
+		reg = <0xd>;
+	};
+
+	channel@e {
+		reg = <0xe>;
+	};
+};
diff --git a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
index 9ca26725a3e9..a7123a9ec684 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -338,3 +338,82 @@ &wdt2 {
 	status = "okay";
 	timeout-sec = <60>;
 };
+
+/*
+ * ADC0 AN000 can be connected to a potentiometer on the board or
+ * exposed on ADC header.
+ *
+ * T2H:
+ * SW17[1] = ON, SW17[2] = OFF - Potentiometer
+ * SW17[1] = OFF, SW17[2] = ON  - CN41 header
+ * N2H:
+ * DSW6[1] = OFF, DSW6[2] = ON - Potentiometer
+ * DSW6[1] = ON, DSW6[2] = OFF - CN3 header
+ */
+&adc0 {
+	status = "okay";
+
+	channel@0 {
+		reg = <0x0>;
+	};
+
+	channel@1 {
+		reg = <0x1>;
+	};
+
+	channel@2 {
+		reg = <0x2>;
+	};
+
+	channel@3 {
+		reg = <0x3>;
+	};
+};
+
+/*
+ * ADC1 AN100 can be exposed on ADC header or on mikroBUS connector.
+ *
+ * T2H:
+ * SW18[1] = ON, SW18[2] = OFF - CN42 header
+ * SW18[1] = OFF, SW18[2] = ON - mikroBUS
+ * N2H:
+ * DSW6[3] = ON, DSW6[4] = OFF - CN4 header
+ * DSW6[3] = OFF, DSW6[4] = ON - mikroBUS
+ *
+ * ADC1 AN101 can be exposed on ADC header or on Grove2 connector.
+ *
+ * T2H:
+ * SW18[3] = ON, SW18[4] = OFF - CN42 header
+ * SW18[3] = OFF, SW18[4] = ON - Grove2
+ * N2H:
+ * DSW6[5] = ON, DSW6[6] = OFF - CN4 header
+ * DSW6[5] = OFF, DSW6[6] = ON - Grove2
+ *
+ * ADC1 AN102 can be exposed on ADC header or on Grove2 connector.
+ *
+ * T2H:
+ * SW18[5] = ON, SW18[6] = OFF - CN42 header
+ * SW18[5] = OFF, SW18[6] = ON - Grove2
+ * N2H:
+ * DSW6[7] = ON, DSW6[8] = OFF - CN4 header
+ * DSW6[7] = OFF, DSW6[8] = ON - Grove2
+ */
+&adc1 {
+	status = "okay";
+
+	channel@0 {
+		reg = <0x0>;
+	};
+
+	channel@1 {
+		reg = <0x1>;
+	};
+
+	channel@2 {
+		reg = <0x2>;
+	};
+
+	channel@3 {
+		reg = <0x3>;
+	};
+};
-- 
2.51.0