arm64: dts: renesas: rzt2h-n2h-evk: Enable USB2.0 support

Enable USB2.0 support on RZ/T2H and RZ/N2H EVKs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250904100435.4033858-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

3 files changed, 99 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
index 264f7ddb8cc5..2bf867273ad0 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -29,6 +29,28 @@
  */
 #define SD1_MICRO_SD	1
 
+/*
+ * USB Pin Configuration:
+ *
+ * This board is equipped with three USB connectors: Type-A (CN80), Mini-B
+ * (CN79), and Micro-AB (CN33). The RZ/T2H SoC has a single USB channel, so
+ * either the USB host interface or the USB function interface can be used,
+ * but not both simultaneously when using the CN79 and CN80 connectors.
+ *
+ * By default, the Type-A (CN80) and Mini-B (CN79) connectors are enabled.
+ * Configure the switches as follows:
+ *   - P00_0 - P00_2 (control signals for USB power supply): SW1[5] = ON
+ *   - USB_VBUSIN (used for USB function): SW7[7] = OFF; SW7[8] = ON
+ *   - USB_VBUSEN (used for USB_HF_VBUSEN): SW7[9] = OFF; SW7[10] = ON
+ *
+ * To enable the Micro-AB (CN33) USB OTG connector, set the following macro
+ * to 1 and configure the switches as follows:
+ *   - P00_0 - P00_2 (control signals for USB power supply): SW1[5] = ON
+ *   - USB_VBUSIN (used for USB OTG): SW7[7] = ON; SW7[8] = OFF
+ *   - USB_VBUSEN (used for USB_OTG_VBUSEN): SW7[9] = ON; SW7[10] = OFF
+ */
+#define USB_OTG		0
+
 #include "rzt2h-n2h-evk-common.dtsi"
 
 / {
@@ -145,4 +167,18 @@
 		pinmux = <RZT2H_PORT_PINMUX(5, 0, 0x17)>, /* SDA */
 			 <RZT2H_PORT_PINMUX(4, 7, 0x17)>; /* SCL */
 	};
+
+#if USB_OTG
+	usb-exicen-hog {
+		gpio-hog;
+		gpios = <RZT2H_GPIO(0, 2) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "usb_exicen_a";
+	};
+#endif
+
+	usb_pins: usb-pins {
+		pinmux = <RZT2H_PORT_PINMUX(0, 0, 0x13)>, /* VBUSEN */
+			 <RZT2H_PORT_PINMUX(0, 1, 0x13)>; /* OVRCUR */
+	};
 };
diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index 80f358fb2d74..084b3a0c8052 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -33,6 +33,33 @@
  */
 #define SD1_MICRO_SD	1
 
+/*
+ * USB Pin Configuration:
+ *
+ * This board is equipped with three USB connectors: Type-A (CN7), Mini-B
+ * (CN8), and Micro-AB (CN9). The RZ/N2H SoC has a single USB channel, so
+ * either the USB host interface or the USB function interface can be used,
+ * but not both simultaneously when using the CN7 and CN8 connectors.
+ *
+ * By default, the Type-A (CN7) and Mini-B (CN8) connectors are enabled.
+ * Configure the switches as follows:
+ *   - P02_2 - P02_3 (control signals for USB power supply): DSW2[6] = OFF;
+ *     - P02_2 (used for VBUSEN): DSW14[5] = OFF; DSW14[6] = ON
+ *     - P02_3 (used for USB_OVRCUR): DSW14[1] = OFF; DSW14[2] = ON
+ *   - USB_VBUSIN (used for VBUS of CN8): DSW16[1] = OFF; DSW16[2] = ON
+ *   - USB_VBUSEN (used for USB_HF_VBUSEN): DSW16[3] = OFF; DSW16[4] = ON
+ *
+ * To enable the Micro-AB (CN9) USB OTG connector, set the following macro
+ * to 1 and configure the switches as follows:
+ *   - P02_2 - P02_3 (control signals for USB power supply): DSW2[6] = OFF;
+ *     - P02_2 (used for VBUSEN): DSW14[5] = OFF; DSW14[6] = ON
+ *     - P02_3 (used for USB_OVRCUR): DSW14[1] = OFF; DSW14[2] = ON
+ *   - USB_VBUSIN (used for VBUS for OTG): DSW16[1] = ON; DSW16[2] = OFF
+ *   - USB_VBUSEN (used for USB_OTG_VBUSEN): DSW16[3] = ON; DSW16[4] = OFF
+ *   - USB_EXICEN (used for USB OTG EXICEN): DSW14[3] = OFF; DSW14[4] = ON
+ */
+#define USB_OTG		0
+
 #include "rzt2h-n2h-evk-common.dtsi"
 
 /*
@@ -185,4 +212,18 @@
 		pinmux = <RZT2H_PORT_PINMUX(3, 3, 0x17)>,
 			 <RZT2H_PORT_PINMUX(3, 4, 0x17)>;
 	};
+
+#if USB_OTG
+	usb-exicen-hog {
+		gpio-hog;
+		gpios = <RZT2H_GPIO(2, 4) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "usb_exicen_a";
+	};
+#endif
+
+	usb_pins: usb-pins {
+		pinmux = <RZT2H_PORT_PINMUX(2, 2, 0x13)>, /* VBUSEN */
+			 <RZT2H_PORT_PINMUX(2, 3, 0x13)>; /* OVRCUR */
+	};
 };
diff --git a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
index 91068042bec0..5c91002c99c4 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -65,10 +65,20 @@
 #endif
 };
 
+&ehci {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &extal_clk {
 	clock-frequency = <25000000>;
 };
 
+&hsusb {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &i2c0 {
 	eeprom: eeprom@50 {
 		compatible = "renesas,r1ex24016", "atmel,24c16";
@@ -77,6 +87,11 @@
 	};
 };
 
+&ohci {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &pinctrl {
 	/*
 	 * SCI0 Pin Configuration:
@@ -218,6 +233,13 @@
 };
 #endif
 
+&usb2_phy {
+	pinctrl-0 = <&usb_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &wdt2 {
 	status = "okay";
 	timeout-sec = <60>;