[PATCH v3 14/21] arm64: dts: renesas: r9a09g057: Add USB2.0 VBUS_SEL mux-controller support

[Tommaso Merciai]

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 the internal mux-controller node to the usb20phyrst and usb21phyrst
reset nodes.

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 at bp.renesas.com>
---
v2->v3:
 - Manipulate the mux controller as an internal node, and update
   commit body accordingly.

v1->v2:
 - New patch

 arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
index 40b15f1db930..6c6ef5967bc0 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 at 15800200 {
 			resets = <&usb20phyrst>;
 			#phy-cells = <1>;
 			power-domains = <&cpg>;
+			mux-states = <&usb20phyrst_mux 1>;
 			status = "disabled";
 		};
 
@@ -1002,6 +1003,7 @@ usb2_phy1: usb-phy at 15810200 {
 			resets = <&usb21phyrst>;
 			#phy-cells = <1>;
 			power-domains = <&cpg>;
+			mux-states = <&usb21phyrst_mux 0>;
 			status = "disabled";
 		};
 
@@ -1030,6 +1032,10 @@ usb20phyrst: usb20phy-reset at 15830000 {
 			power-domains = <&cpg>;
 			#reset-cells = <0>;
 			status = "disabled";
+
+			usb20phyrst_mux: mux-controller {
+				#mux-state-cells = <1>;
+			};
 		};
 
 		usb21phyrst: usb21phy-reset at 15840000 {
@@ -1040,6 +1046,10 @@ usb21phyrst: usb21phy-reset at 15840000 {
 			power-domains = <&cpg>;
 			#reset-cells = <0>;
 			status = "disabled";
+
+			usb21phyrst_mux: mux-controller {
+				#mux-state-cells = <1>;
+			};
 		};
 
 		sdhi0: mmc at 15c00000  {
-- 
2.43.0