[PATCH v4 16/22] arm64: dts: renesas: r9a09g056: Add USB2.0 VBUS_SEL mux-controller support

Tommaso Merciai
2025-11-21T15:15:10Z

Enable control of USB2.0 VBUSEN via the VBUS_SEL bit in the VBENCTL
register. According to the RZ/V2N SoC hardware manual, OTG channel
require VBUS_SEL set.

Add `#mux-state-cells` to the usb20phyrst reset node to expose
them as mux controllers.

Set the required mux-states in usb2_phy0 (OTG: state 1) node.

This enables proper VBUSEN management for OTG channel.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v3->v4:
- Switch back to v2 implementation.
- Improve commit body.

v2->v3:
- No changes

v1->v2:
- No changes

arch/arm64/boot/dts/renesas/r9a09g056.dtsi | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
index 8781c2fa7313..fd2b72caeceb 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
@@ -663,6 +663,7 @@ usb2_phy0: usb-phy@15800200 {
resets = <&usb20phyrst>;
#phy-cells = <1>;
power-domains = <&cpg>;
+ mux-states = <&usb20phyrst 1>;
status = "disabled";
};

@@ -691,6 +692,7 @@ usb20phyrst: usb20phy-reset@15830000 {
resets = <&cpg 0xaf>;
power-domains = <&cpg>;
#reset-cells = <0>;
+ #mux-state-cells = <1>;
status = "disabled";
};

--
2.43.0