linux-kernel - [PATCH 8/9] arm64: dts: renesas: rzg2lc: Set Ethernet PVDD to 1.8V

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Message-Id: <20240524094603.988-9-paul.barker.ct@bp.renesas.com>
Date: Fri, 24 May 2024 10:46:02 +0100
From: Paul Barker <paul.barker.ct@...renesas.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>
Cc: Paul Barker <paul.barker.ct@...renesas.com>,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 8/9] arm64: dts: renesas: rzg2lc: Set Ethernet PVDD to 1.8V

On the RZ/G2LC SMARC SOM, the RGMII interface between the SoC and the
Ethernet PHY operates at 1.8V.

The power supply for this interface may be correctly configured in
u-boot, but the kernel should not be relying on this. Now that the
RZ/G2L pinctrl driver supports configuring the Ethernet power supply
voltage, we can simply specify the desired voltage in the device tree.

Signed-off-by: Paul Barker <paul.barker.ct@...renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi
index 664311fd2098..b4ef5ea8a9e3 100644
--- a/arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi
@@ -130,6 +130,7 @@ &pinctrl {
 	eth0_pins: eth0 {
 		txc {
 			pinmux = <RZG2L_PORT_PINMUX(20, 0, 1)>; /* ET0_TXC */
+			power-source = <1800>;
 			output-enable;
 		};
 
@@ -147,8 +148,12 @@ mux {
 				 <RZG2L_PORT_PINMUX(25, 0, 1)>, /* ET0_RXD0 */
 				 <RZG2L_PORT_PINMUX(25, 1, 1)>, /* ET0_RXD1 */
 				 <RZG2L_PORT_PINMUX(26, 0, 1)>, /* ET0_RXD2 */
-				 <RZG2L_PORT_PINMUX(26, 1, 1)>, /* ET0_RXD3 */
-				 <RZG2L_PORT_PINMUX(0, 0, 1)>;  /* IRQ0 */
+				 <RZG2L_PORT_PINMUX(26, 1, 1)>; /* ET0_RXD3 */
+			power-source = <1800>;
+		};
+
+		irq {
+			pinmux = <RZG2L_PORT_PINMUX(0, 0, 1)>;  /* IRQ0 */
 		};
 	};
 
-- 
2.39.2