linux-kernel - [PATCH v2 14/21] arm64: dts: renesas: r9a09g057: Add USB2.0 VBUS

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Message-ID: <08ca312e2f2f13a8b9267b0bdb93f3ac484d9365.1762354366.git.tommaso.merciai.xr@bp.renesas.com>
Date: Wed,  5 Nov 2025 16:39:10 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Peter Rosin <peda@...ntia.se>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-phy@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 14/21] arm64: dts: renesas: r9a09g057: Add USB2.0 VBUS_SEL mux-controller support

Enable control of USB2.0 VBUSEN via the VBUS_SEL bit in the VBENCTL
register. According to the RZ/V2H(P) SoC hardware manual, OTG channels
require VBUS_SEL set, while HOST-only channels require it cleared.

Add #mux-state-cells = <1>; to the usb20phyrst and usb21phyrst reset
nodes to expose them as mux controllers.

Set the required mux-states in usb2_phy0 (OTG: state 1) and usb2_phy1
(HOST: state 0) nodes.

This enables proper VBUSEN management for OTG and HOST-only USB2.0
channels.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
v1->v2:
 - New patch

 arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
index 40b15f1db930..b94a06b6f83e 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
@@ -989,6 +989,7 @@ usb2_phy0: usb-phy@...00200 {
 			resets = <&usb20phyrst>;
 			#phy-cells = <1>;
 			power-domains = <&cpg>;
+			mux-states = <&usb20phyrst 1>;
 			status = "disabled";
 		};
 
@@ -1002,6 +1003,7 @@ usb2_phy1: usb-phy@...10200 {
 			resets = <&usb21phyrst>;
 			#phy-cells = <1>;
 			power-domains = <&cpg>;
+			mux-states = <&usb21phyrst 0>;
 			status = "disabled";
 		};
 
@@ -1029,6 +1031,7 @@ usb20phyrst: usb20phy-reset@...30000 {
 			resets = <&cpg 0xaf>;
 			power-domains = <&cpg>;
 			#reset-cells = <0>;
+			#mux-state-cells = <1>;
 			status = "disabled";
 		};
 
@@ -1039,6 +1042,7 @@ usb21phyrst: usb21phy-reset@...40000 {
 			resets = <&cpg 0xaf>;
 			power-domains = <&cpg>;
 			#reset-cells = <0>;
+			#mux-state-cells = <1>;
 			status = "disabled";
 		};
 
-- 
2.43.0