linux-kernel - [PATCH] arm64: dts: imx8mp-venice-gw74xx: add USB DR support

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Message-Id: <20220908154227.4099410-1-tharvey@gateworks.com>
Date:   Thu,  8 Sep 2022 08:42:27 -0700
From:   Tim Harvey <tharvey@...eworks.com>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     NXP Linux Team <linux-imx@....com>,
        Fabio Estevam <festevam@...il.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        Jun Li <jun.li@....com>, Tim Harvey <tharvey@...eworks.com>
Subject: [PATCH] arm64: dts: imx8mp-venice-gw74xx: add USB DR support

Add support for USB DR on USB1 interface. Host/Device detection is done
using the usb-role-switch connector with a GPIO as USB1_OTG_ID is not
connected internally.

Signed-off-by: Tim Harvey <tharvey@...eworks.com>
---
 .../dts/freescale/imx8mp-venice-gw74xx.dts    | 30 +++++++++++++++----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
index 9fb492a8b045..e0fe356b662d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
@@ -598,20 +598,35 @@ &uart4 {
 };
 
 /* USB1 - Type C front panel */
-&usb3_phy0 {
+&usb3_0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usb1>;
+	fsl,over-current-active-low;
 	status = "okay";
 };
 
-&usb3_0 {
-	fsl,over-current-active-low;
+&usb3_phy0 {
 	status = "okay";
 };
 
 &usb_dwc3_0 {
-	dr_mode = "host";
+	/* dual role is implemented but not a full featured OTG */
+	adp-disable;
+	hnp-disable;
+	srp-disable;
+	dr_mode = "otg";
+	usb-role-switch;
+	role-switch-default-mode = "peripheral";
 	status = "okay";
+
+	connector {
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_usbcon1>;
+		compatible = "gpio-usb-b-connector", "usb-b-connector";
+		type = "micro";
+		label = "Type-C";
+		id-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 /* USB2 - USB3.0 Hub */
@@ -870,7 +885,12 @@ MX8MP_IOMUXC_UART4_TXD__UART4_DCE_TX	0x140
 	pinctrl_usb1: usb1grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_GPIO1_IO13__USB1_OTG_OC	0x140
-			MX8MP_IOMUXC_GPIO1_IO10__USB1_OTG_ID	0x140
+		>;
+	};
+
+	pinctrl_usbcon1: usb1congrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_GPIO1_IO10__GPIO1_IO10	0x140
 		>;
 	};
 
-- 
2.25.1