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From: Andrejs Cainikovs <andrejs.cainikovs@gmail.com>
To: Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>,
	Francesco Dolcini <francesco.dolcini@toradex.com>,
	linux-arm-kernel@lists.infradead.org,
	devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2] arm64: dts: ti: verdin-am62: add support for Verdin USB1 interface
Date: Fri,  9 Feb 2024 14:01:06 +0100
Message-Id: <20240209130106.38739-1-andrejs.cainikovs@gmail.com>
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MIME-Version: 1.0
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From: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>

Add support for Verdin USB1 interface, implements role switch
functionality using "gpio-usb-b-connector", VBUS is also now
controlled with "regulator-fixed" using a standard GPIO.

Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
v1:
 - https://lore.kernel.org/all/20240209110500.22193-1-andrejs.cainikovs@gmail.com/
v2:
 - fix GPIO naming as per rest of the file
---
 arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi | 55 +++++++++++++++++-----
 1 file changed, 44 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
index 6a06724b6d16..7e9bdba438b1 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -42,6 +42,22 @@ aliases {
 		usb1 = &usb1;
 	};
 
+	connector {
+		compatible = "gpio-usb-b-connector", "usb-b-connector";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_usb0_id>;
+		id-gpios = <&main_gpio1 19 GPIO_ACTIVE_HIGH>;
+		label = "USB_1";
+		self-powered;
+		vbus-supply = <&reg_usb0_vbus>;
+
+		port {
+			usb_dr_connector: endpoint {
+				remote-endpoint = <&usb0_ep>;
+			};
+		};
+	};
+
 	verdin_gpio_keys: gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
@@ -151,6 +167,18 @@ reg_sdhc1_vqmmc: regulator-sdhci1-vqmmc {
 		vin-supply = <&reg_sd_3v3_1v8>;
 	};
 
+	reg_usb0_vbus: regulator-usb0-vbus {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_usb0_en>;
+		enable-active-high;
+		/* Verdin USB_1_EN (SODIMM 155) */
+		gpio = <&main_gpio1 50 GPIO_ACTIVE_HIGH>;
+		regulator-max-microvolt = <5000000>;
+		regulator-min-microvolt = <5000000>;
+		regulator-name = "USB_1_EN";
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -436,6 +464,13 @@ AM62X_IOPAD(0x0244, PIN_INPUT_PULLUP, 7) /* (C17) MMC1_SDWP.GPIO1_49 */ /* SODIM
 		>;
 	};
 
+	/* Verdin USB_1_EN */
+	pinctrl_usb0_en: main-gpio1-50-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x0254, PIN_INPUT, 7) /* (C20) USB0_DRVVBUS.GPIO1_50 */ /* SODIMM 155 */
+		>;
+	};
+
 	/* On-module I2C - PMIC_I2C */
 	pinctrl_i2c0: main-i2c0-default-pins {
 		pinctrl-single,pins = <
@@ -660,13 +695,6 @@ AM62X_IOPAD(0x0038, PIN_OUTPUT,       5) /* (E24) OSPI0_CSn3.UART5_TXD    */ /*
 		>;
 	};
 
-	/* Verdin USB_1 */
-	pinctrl_usb0: main-usb0-default-pins {
-		pinctrl-single,pins = <
-			AM62X_IOPAD(0x0254, PIN_OUTPUT, 0) /* (C20) USB0_DRVVBUS */ /* SODIMM 155 */
-		>;
-	};
-
 	/* Verdin USB_2 */
 	pinctrl_usb1: main-usb1-default-pins {
 		pinctrl-single,pins = <
@@ -1013,7 +1041,7 @@ &main_gpio1 {
 		"",
 		"",
 		"SODIMM_17",
-		"", /* 50 */
+		"SODIMM_155", /* 50 */
 		"",
 		"",
 		"",
@@ -1428,11 +1456,16 @@ &usbss0 {
 	status = "disabled";
 };
 
-/* TODO: role swich using ID pin */
 &usb0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_usb0>, <&pinctrl_usb0_id>;
+	adp-disable;
+	usb-role-switch;
 	status = "disabled";
+
+	port {
+		usb0_ep: endpoint {
+			remote-endpoint = <&usb_dr_connector>;
+		};
+	};
 };
 
 /* Verdin USB_2 */
-- 
2.34.1