[PATCH v4 0/3] Add USB2.0 support for RZ/G3E

[PATCH v4 0/3] Add USB2.0 support for RZ/G3E

[Tommaso Merciai]

Dear All,

This patch series adds USB2.0 support for the Renesas R9A09G047 SoC and
enables it on the RZ/G3E SMARK II board.

Kind regards,
Tommaso

v3->v4:
 - Readded v1 RZ/G3L placeholder patch.
 - Drop usb21_pins.
 - Collected tag.

v2->v3:
 - No changes just rebased on top of next-20260908.

v1->v2:
 - Included PATCH v7 7/9 and PATCH v7 6/9 from
   v7: https://lore.kernel.org/all/20260812141940.246223-1-biju.das.jz@bp.renesas.com/
 - Drop placeholder patch
 - PATCH 4/4: Disabled RZ/G3L common nodes from r9a08g046l48-smarc.dts.
   Update commit body, and improved usb20_pins, usb21_pins comments.

Tommaso Merciai (3):
  arm64: dts: renesas: r9a08g046: Add USB2.0 placeholder nodes
  arm64: dts: renesas: r9a09g047: Add USB2.0 support
  arm64: dts: renesas: r9a09g047e57-smarc: Enable USB2.0 support

 arch/arm64/boot/dts/renesas/r9a08g046.dtsi    |  25 ++++
 .../boot/dts/renesas/r9a08g046l48-smarc.dts   |  20 +++
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi    | 124 ++++++++++++++++++
 .../boot/dts/renesas/r9a09g047e57-smarc.dts   |  31 +++++
 .../boot/dts/renesas/renesas-smarc2.dtsi      |  25 ++++
 5 files changed, 225 insertions(+)

-- 
2.54.0

[PATCH v4 1/3] arm64: dts: renesas: r9a08g046: Add USB2.0 placeholder nodes

[Tommaso Merciai]

The USB2.0 wiring on the RZ SMARC Carrier-II board is the same for the
RZ/G3E and RZ/G3L SoMs, so the nodes belong in the shared
renesas-smarc2.dtsi. Enabling them there breaks the RZ/G3L SMARC EVK
build, as the r9a08g046 (RZ/G3L) SoC DTSI describes neither the USB2.0
host (OHCI/EHCI) nor function (HSUSB) instances:

Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:94.1-7 Label or path ehci0 not found
Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:99.1-7 Label or path ehci1 not found
Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:104.1-8 Label or path hsusb0 not found
Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:114.1-7 Label or path ohci0 not found
Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:119.1-7 Label or path ohci1 not found

Add minimal placeholder nodes carrying only the reg property.
The remaining properties will be filled in once USB2.0 support for
RZ/G3L is complete.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v3->v4:
 - No change, re-sent from v1.
 - Link to v1: https://lore.kernel.org/all/aec1fce5558c6c88725fe710a2f9e4b1eb9e8d64.1787062965.git.tommaso.merciai.xr@bp.renesas.com/

 arch/arm64/boot/dts/renesas/r9a08g046.dtsi | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g046.dtsi b/arch/arm64/boot/dts/renesas/r9a08g046.dtsi
index 98424a97f169..29a5de27852e 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g046.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a08g046.dtsi
@@ -1266,6 +1266,31 @@ queue3 {
 			};
 		};
 
+		ohci0: usb@11e10000 {
+			reg = <0 0x11e10000 0 0x100>;
+			/* placeholder */
+		};
+
+		ohci1: usb@11e90000 {
+			reg = <0 0x11e90000 0 0x100>;
+			/* placeholder */
+		};
+
+		ehci0: usb@11e10100 {
+			reg = <0 0x11e10100 0 0x100>;
+			/* placeholder */
+		};
+
+		ehci1: usb@11e90100 {
+			reg = <0 0x11e90100 0 0x100>;
+			/* placeholder */
+		};
+
+		hsusb0: usb@11e30000 {
+			reg = <0 0x11e30000 0 0x10000>;
+			/* placeholder */
+		};
+
 		pcie: pcie@11e40000 {
 			reg = <0 0x11e40000 0 0x10000>;
 			ranges = <0x02000000 0 0x30000000 0 0x30000000 0 0x08000000>;
-- 
2.54.0

Re: [PATCH v4 1/3] arm64: dts: renesas: r9a08g046: Add USB2.0 placeholder nodes

[Geert Uytterhoeven]

On Tue, 22 Sept 2026 at 00:27, Tommaso Merciai
<tommaso.merciai.xr@bp.renesas.com> wrote:
> The USB2.0 wiring on the RZ SMARC Carrier-II board is the same for the
> RZ/G3E and RZ/G3L SoMs, so the nodes belong in the shared
> renesas-smarc2.dtsi. Enabling them there breaks the RZ/G3L SMARC EVK
> build, as the r9a08g046 (RZ/G3L) SoC DTSI describes neither the USB2.0
> host (OHCI/EHCI) nor function (HSUSB) instances:
>
> Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:94.1-7 Label or path ehci0 not found
> Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:99.1-7 Label or path ehci1 not found
> Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:104.1-8 Label or path hsusb0 not found
> Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:114.1-7 Label or path ohci0 not found
> Error: arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi:119.1-7 Label or path ohci1 not found
>
> Add minimal placeholder nodes carrying only the reg property.
> The remaining properties will be filled in once USB2.0 support for
> RZ/G3L is complete.
>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v7.4.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v4 2/3] arm64: dts: renesas: r9a09g047: Add USB2.0 support

[Tommaso Merciai]

The Renesas RZ/G3E ("R9A09G047") SoC supports 1x channel with OTG/DRD
and 1x channel with host interface.

Add the EHCI, OHCI, USB2.0 PHY and reset control nodes for USB2.0 channels
in R9A09G047 SoC DTSI.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v3->v4:
 - Collected tag.

v2->v3:
 - No changes just rebased on top of next-20260908.

v1->v2:
 - No changes

 arch/arm64/boot/dts/renesas/r9a09g047.dtsi | 124 +++++++++++++++++++++
 1 file changed, 124 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
index 72120e2abf8b..56ceedfb8ae8 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
@@ -1773,6 +1773,130 @@ usb3_phy: usb-phy@15870000 {
 			status = "disabled";
 		};
 
+		ohci0: usb@15800000 {
+			compatible = "generic-ohci";
+			reg = <0 0x15800000 0 0x100>;
+			interrupts = <GIC_SPI 742 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb3>, <&cpg CPG_MOD 0xb6>;
+			resets = <&usb20phyrst>, <&cpg 0xac>;
+			phys = <&usb2_phy0 1>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ohci1: usb@15810000 {
+			compatible = "generic-ohci";
+			reg = <0 0x15810000 0 0x100>;
+			interrupts = <GIC_SPI 747 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb4>, <&cpg CPG_MOD 0xb7>;
+			resets = <&usb21phyrst>, <&cpg 0xad>;
+			phys = <&usb2_phy1 1>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ehci0: usb@15800100 {
+			compatible = "generic-ehci";
+			reg = <0 0x15800100 0 0x100>;
+			interrupts = <GIC_SPI 743 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb3>, <&cpg CPG_MOD 0xb6>;
+			resets = <&usb20phyrst>, <&cpg 0xac>;
+			phys = <&usb2_phy0 2>;
+			phy-names = "usb";
+			companion = <&ohci0>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ehci1: usb@15810100 {
+			compatible = "generic-ehci";
+			reg = <0 0x15810100 0 0x100>;
+			interrupts = <GIC_SPI 748 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb4>, <&cpg CPG_MOD 0xb7>;
+			resets = <&usb21phyrst>, <&cpg 0xad>;
+			phys = <&usb2_phy1 2>;
+			phy-names = "usb";
+			companion = <&ohci1>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		usb2_phy0: usb-phy@15800200 {
+			compatible = "renesas,usb2-phy-r9a09g047",
+				     "renesas,usb2-phy-r9a09g057";
+			reg = <0 0x15800200 0 0x700>;
+			interrupts = <GIC_SPI 745 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb3>,
+				 <&cpg CPG_CORE R9A09G047_USB2_0_CLK_CORE0>;
+			clock-names = "fck", "usb_x1";
+			resets = <&usb20phyrst>, <&cpg 0xac>;
+			#phy-cells = <1>;
+			power-domains = <&cpg>;
+			mux-states = <&usb20phyrst 1>;
+			status = "disabled";
+
+			usb2_phy0_vbus_otg: vbus-regulator {
+				regulator-name = "USB2PHY0-VBUS-OTG";
+			};
+		};
+
+		usb2_phy1: usb-phy@15810200 {
+			compatible = "renesas,usb2-phy-r9a09g047",
+				     "renesas,usb2-phy-r9a09g057";
+			reg = <0 0x15810200 0 0x700>;
+			interrupts = <GIC_SPI 750 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb4>,
+				 <&cpg CPG_CORE R9A09G047_USB2_0_CLK_CORE1>;
+			clock-names = "fck", "usb_x1";
+			resets = <&usb21phyrst>, <&cpg 0xad>;
+			#phy-cells = <1>;
+			power-domains = <&cpg>;
+			mux-states = <&usb21phyrst 0>;
+			status = "disabled";
+		};
+
+		hsusb0: usb@15820000 {
+			compatible = "renesas,usbhs-r9a09g047",
+				     "renesas,rzg2l-usbhs";
+			reg = <0 0x15820000 0 0x10000>;
+			interrupts = <GIC_SPI 751 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 752 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 753 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 754 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 0xb3>, <&cpg CPG_MOD 0xb5>;
+			resets = <&usb20phyrst>, <&cpg 0xae>;
+			phys = <&usb2_phy0 3>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		usb20phyrst: reset-controller@15830000 {
+			compatible = "renesas,r9a09g047-usb2phy-reset",
+				     "renesas,r9a09g057-usb2phy-reset";
+			reg = <0 0x15830000 0 0x10000>;
+			clocks = <&cpg CPG_MOD 0xb6>;
+			resets = <&cpg 0xaf>;
+			power-domains = <&cpg>;
+			#reset-cells = <0>;
+			#mux-state-cells = <1>;
+			status = "disabled";
+		};
+
+		usb21phyrst: reset-controller@15840000 {
+			compatible = "renesas,r9a09g047-usb2phy-reset",
+				     "renesas,r9a09g057-usb2phy-reset";
+			reg = <0 0x15840000 0 0x10000>;
+			clocks = <&cpg CPG_MOD 0xb7>;
+			resets = <&cpg 0xaf>;
+			power-domains = <&cpg>;
+			#reset-cells = <0>;
+			#mux-state-cells = <1>;
+			status = "disabled";
+		};
+
 		sdhi0: mmc@15c00000 {
 			compatible = "renesas,sdhi-r9a09g047", "renesas,sdhi-r9a09g057";
 			reg = <0x0 0x15c00000 0 0x10000>;
-- 
2.54.0

Re: [PATCH v4 2/3] arm64: dts: renesas: r9a09g047: Add USB2.0 support

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] dts: nodes not sorted by unit address
--

commit db8934356239e961e6360c8c46e87d977245ad6d
Author: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>

arm64: dts: renesas: r9a09g047: Add USB2.0 support

The Renesas RZ/G3E (R9A09G047) SoC supports one channel with OTG/DRD and one
channel with host interface. This commit adds the EHCI, OHCI, USB2.0 PHY,
and reset control nodes for USB2.0 channels in the R9A09G047 SoC DTSI.

> diff --git a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> index 72120e2abf8b4..56ceedfb8ae88 100644
> --- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> @@ -1773,6 +1773,130 @@ usb3_phy: usb-phy@15870000 {
>  			status = "disabled";
>  		};
>  
> +		ohci0: usb@15800000 {

[Severity: Low]
This isn't a bug, but should the newly added nodes be sorted by unit address?
The ohci0 node at address 15800000 is being placed after the existing usb3_phy
node at 15870000.

> +			compatible = "generic-ohci";
> +			reg = <0 0x15800000 0 0x100>;

[ ... ]

> +		ohci1: usb@15810000 {
> +			compatible = "generic-ohci";
> +			reg = <0 0x15810000 0 0x100>;

[ ... ]

> +			power-domains = <&cpg>;
> +			status = "disabled";
> +		};
> +
> +		ehci0: usb@15800100 {

[Severity: Low]
Similarly, should ehci0 at address 15800100 be placed before ohci1 at 15810000
to maintain unit address sorting among the newly added nodes?

> +			compatible = "generic-ehci";
> +			reg = <0 0x15800100 0 0x100>;

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/cover.1790005703.git.tommaso.merciai.xr@bp.renesas.com?part=2

Re: [PATCH v4 2/3] arm64: dts: renesas: r9a09g047: Add USB2.0 support

[Geert Uytterhoeven]

Hi Sashiko,

On Tue, 22 Sept 2026 at 00:47, <sashiko-bot@kernel.org> wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Low] dts: nodes not sorted by unit address
> --
>
> commit db8934356239e961e6360c8c46e87d977245ad6d
> Author: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
>
> arm64: dts: renesas: r9a09g047: Add USB2.0 support
>
> The Renesas RZ/G3E (R9A09G047) SoC supports one channel with OTG/DRD and one
> channel with host interface. This commit adds the EHCI, OHCI, USB2.0 PHY,
> and reset control nodes for USB2.0 channels in the R9A09G047 SoC DTSI.
>
> > diff --git a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> > index 72120e2abf8b4..56ceedfb8ae88 100644
> > --- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> > @@ -1773,6 +1773,130 @@ usb3_phy: usb-phy@15870000 {
> >                       status = "disabled";
> >               };
> >
> > +             ohci0: usb@15800000 {
>
> [Severity: Low]
> This isn't a bug, but should the newly added nodes be sorted by unit address?
> The ohci0 node at address 15800000 is being placed after the existing usb3_phy
> node at 15870000.

Yes, that is indeed the wrong location.

>
> > +                     compatible = "generic-ohci";
> > +                     reg = <0 0x15800000 0 0x100>;
>
> [ ... ]
>
> > +             ohci1: usb@15810000 {
> > +                     compatible = "generic-ohci";
> > +                     reg = <0 0x15810000 0 0x100>;
>
> [ ... ]
>
> > +                     power-domains = <&cpg>;
> > +                     status = "disabled";
> > +             };
> > +
> > +             ehci0: usb@15800100 {
>
> [Severity: Low]
> Similarly, should ehci0 at address 15800100 be placed before ohci1 at 15810000
> to maintain unit address sorting among the newly added nodes?

No. Nodes should be sorted by unit address, but nodes of the same type
should be grouped together.

>
> > +                     compatible = "generic-ehci";
> > +                     reg = <0 0x15800100 0 0x100>;
>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v4 2/3] arm64: dts: renesas: r9a09g047: Add USB2.0 support

[Geert Uytterhoeven]

On Tue, 22 Sept 2026 at 00:27, Tommaso Merciai
<tommaso.merciai.xr@bp.renesas.com> wrote:
> The Renesas RZ/G3E ("R9A09G047") SoC supports 1x channel with OTG/DRD
> and 1x channel with host interface.
>
> Add the EHCI, OHCI, USB2.0 PHY and reset control nodes for USB2.0 channels
> in R9A09G047 SoC DTSI.
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>

> --- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
> @@ -1773,6 +1773,130 @@ usb3_phy: usb-phy@15870000 {
>                         status = "disabled";
>                 };
>
> +               ohci0: usb@15800000 {

Moving up to preserve sort order while queuing in renesas-devel
for v7.4.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v4 3/3] arm64: dts: renesas: r9a09g047e57-smarc: Enable USB2.0 support

[Tommaso Merciai]

Enable USB2.0 support on the RZ/G3E EVK board. The USB1B_1A_HOST and
USB5_4_HOST connectors support host operation only, while USB0_OTG
supports both host and peripheral operation.

renesas-smarc2.dtsi is shared by all boards based on the RZ SMARC
Carrier II Board. USB2.0 is not yet supported on the RZ/G3L SMARC
EVK, so disable the common USB2.0 nodes in its board DTS until proper
support is added.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v3->v4:
 - Drop usb21_pins.

v2->v3:
 - No changes just rebased on top of next-20260908.

v1->v2:
 - Disabled RZ/G3L common nodes from r9a08g046l48-smarc.dts in this way
   we can drop placeholder patch.
 - Update commit body.
 - Improved usb20_pins, usb21_pins comments.

 .../boot/dts/renesas/r9a08g046l48-smarc.dts   | 20 ++++++++++++
 .../boot/dts/renesas/r9a09g047e57-smarc.dts   | 31 +++++++++++++++++++
 .../boot/dts/renesas/renesas-smarc2.dtsi      | 25 +++++++++++++++
 3 files changed, 76 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc.dts b/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc.dts
index 5289efd1a430..ccd6e6394532 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a08g046l48-smarc.dts
@@ -71,6 +71,18 @@ codec_dai: codec {
 #endif
 };
 
+&ehci0 {
+	status = "disabled";
+};
+
+&ehci1 {
+	status = "disabled";
+};
+
+&hsusb0 {
+	status = "disabled";
+};
+
 &i2c2 {
 	pinctrl-0 = <&i2c2_pins>;
 	pinctrl-names = "default";
@@ -122,6 +134,14 @@ &keys {
 #endif
 };
 
+&ohci0 {
+	status = "disabled";
+};
+
+&ohci1 {
+	status = "disabled";
+};
+
 &pinctrl {
 	audio_clk_pins: audio-clock {
 		pinmux = <RZG3L_PORT_PINMUX(H, 4, 6)>, /* AUDIO_CLK_B */
diff --git a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
index 14f5834082fa..095acb87c20c 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
@@ -301,6 +301,17 @@ sd1-data {
 		};
 	};
 
+	usb20_pins: usb20 {
+		ovc {
+			pinmux = <RZG3E_PORT_PINMUX(0, 0, 12)>; /* USB20_OVRCURN */
+			bias-pull-up;
+		};
+
+		vbus {
+			pinmux = <RZG3E_PORT_PINMUX(0, 1, 12)>; /* USB20_VBUSEN */
+		};
+	};
+
 	usb3_pins: usb3 {
 		pinmux = <RZG3E_PORT_PINMUX(4, 1, 12)>, /* USB30_VBUSEN */
 			 <RZG3E_PORT_PINMUX(4, 0, 12)>; /* USB30_OVRCURN */
@@ -397,6 +408,26 @@ &ssi4 {
 	shared-pin;
 };
 
+&usb20phyrst {
+	status = "okay";
+};
+
+&usb21phyrst {
+	status = "okay";
+};
+
+&usb2_phy0 {
+	pinctrl-0 = <&usb20_pins>;
+	pinctrl-names = "default";
+
+	vbus-supply = <&usb2_phy0_vbus_otg>;
+	status = "okay";
+};
+
+&usb2_phy1 {
+	status = "okay";
+};
+
 &usb3_phy {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
index 826a11ab93c7..234ca287ed28 100644
--- a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
+++ b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
@@ -84,11 +84,36 @@ &canfd {
 	status = "okay";
 };
 
+&ehci0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&ehci1 {
+	dr_mode = "host";
+	status = "okay";
+};
+
+&hsusb0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 	clock-frequency = <400000>;
 };
 
+&ohci0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&ohci1 {
+	dr_mode = "host";
+	status = "okay";
+};
+
 &pcie {
 	status = "okay";
 };
-- 
2.54.0

Re: [PATCH v4 3/3] arm64: dts: renesas: r9a09g047e57-smarc: Enable USB2.0 support

[Geert Uytterhoeven]

On Tue, 22 Sept 2026 at 00:27, Tommaso Merciai
<tommaso.merciai.xr@bp.renesas.com> wrote:
> Enable USB2.0 support on the RZ/G3E EVK board. The USB1B_1A_HOST and
> USB5_4_HOST connectors support host operation only, while USB0_OTG
> supports both host and peripheral operation.
>
> renesas-smarc2.dtsi is shared by all boards based on the RZ SMARC
> Carrier II Board. USB2.0 is not yet supported on the RZ/G3L SMARC
> EVK, so disable the common USB2.0 nodes in its board DTS until proper
> support is added.
>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
> ---
> v3->v4:
>  - Drop usb21_pins.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v7.4.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds