LicheePi NanoでUSBデバイスを認識させる

# LicheePi NanoのUSB
載っているSoCのF1C100sはUSB OTGを1ポート備えている。
しかし2020/09/13時点のLicheePi githubの[nano-5.2-tfブランチ](https://github.com/Lichee-Pi/linux/tree/nano-5.2-tf)ではUSBデバイスを認識できない。

# Patch
[WhyCan Forum](https://whycan.cn/index.html)の[f1c100s linux 5.2 USB已完美驱动，host+device完美运行](https://whycan.cn/t_3087.html)というスレッドでパッチが公開されている。
[百度网盘](https://pan.baidu.com/s/1mJl7M4W3RvlqyHt26JgpVA)にパッチをあてたソースが置いてあるようだけどBaiduのアカウントを持っていないため未確認

以下、diffの引用

```
base： 39402432e (grafted, HEAD -> nano-5.2-tf, origin/nano-5.2-tf) HEAD@{0}: clone: from https://github.com/Lichee-Pi/linux.git
diff:
    modified:   arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
    modified:   arch/arm/boot/dts/suniv-f1c100s.dtsi
    modified:   drivers/phy/allwinner/phy-sun4i-usb.c
    modified:   drivers/usb/musb/sunxi.c

diff --git a/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts b/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
index ca644541a..890a57717 100644
--- a/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
+++ b/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dts
@@ -20,7 +20,7 @@
 	};
 
 	panel: panel {
-		compatible = "lg,lb070wv8", "simple-panel";
+		compatible = "qiaodian,qd43003c0-40", "simple-panel";
 		#address-cells = <1>;
 		#size-cells = <0>;
 		enable-gpios = <&pio 4 6 GPIO_ACTIVE_HIGH>;
@@ -79,3 +79,17 @@
 	pinctrl-0 = <&uart0_pe_pins>;
 	status = "okay";
 };
+
+&otg_sram {
+	status = "okay";
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usbphy {
+	usb0_id_det-gpio = <&pio 4 2 GPIO_ACTIVE_HIGH>; /* PE2 */
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/suniv-f1c100s.dtsi b/arch/arm/boot/dts/suniv-f1c100s.dtsi
index 26d8e5577..437bdf7d9 100644
--- a/arch/arm/boot/dts/suniv-f1c100s.dtsi
+++ b/arch/arm/boot/dts/suniv-f1c100s.dtsi
@@ -221,6 +221,31 @@
 			resets = <&ccu RST_BUS_UART2>;
 			status = "disabled";
 		};
+		usb_otg: usb@1c13000 {
+			compatible = "allwinner,suniv-musb";
+			reg = <0x01c13000 0x0400>;
+			clocks = <&ccu CLK_BUS_OTG>;
+			resets = <&ccu RST_BUS_OTG>;
+			interrupts = <26>;
+			interrupt-names = "mc";
+			phys = <&usbphy 0>;
+			phy-names = "usb";
+			extcon = <&usbphy 0>;
+			allwinner,sram = <&otg_sram 1>;
+			status = "disabled";
+		};
+
+		usbphy: phy@1c13400 {
+			compatible = "allwinner,suniv-usb-phy";
+			reg = <0x01c13400 0x10>;
+			reg-names = "phy_ctrl";
+			clocks = <&ccu CLK_USB_PHY0>;
+			clock-names = "usb0_phy";
+			resets = <&ccu RST_USB_PHY0>;
+			reset-names = "usb0_reset";
+			#phy-cells = <1>;
+			status = "disabled";
+		};
 		fe0: display-frontend@1e00000 {
 			compatible = "allwinner,suniv-f1c100s-display-frontend";
 			reg = <0x01e00000 0x20000>;
diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c
index 856927382..3cd9e946a 100644
--- a/drivers/phy/allwinner/phy-sun4i-usb.c
+++ b/drivers/phy/allwinner/phy-sun4i-usb.c
@@ -98,6 +98,7 @@
 #define POLL_TIME			msecs_to_jiffies(250)
 
 enum sun4i_usb_phy_type {
+	suniv_phy,
 	sun4i_a10_phy,
 	sun6i_a31_phy,
 	sun8i_a33_phy,
@@ -859,6 +860,14 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct sun4i_usb_phy_cfg suniv_cfg = {
+	.num_phys = 1,
+	.type = suniv_phy,
+	.disc_thresh = 3,
+	.phyctl_offset = REG_PHYCTL_A10,
+	.dedicated_clocks = true,
+};
+
 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
 	.num_phys = 3,
 	.type = sun4i_a10_phy,
@@ -973,6 +982,7 @@ static const struct sun4i_usb_phy_cfg sun50i_h6_cfg = {
 };
 
 static const struct of_device_id sun4i_usb_phy_of_match[] = {
+	{ .compatible = "allwinner,suniv-usb-phy", .data = &suniv_cfg },
 	{ .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
 	{ .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
 	{ .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
index 832a41f9e..83f3fa5b0 100644
--- a/drivers/usb/musb/sunxi.c
+++ b/drivers/usb/musb/sunxi.c
@@ -714,14 +714,17 @@ static int sunxi_musb_probe(struct platform_device *pdev)
 	INIT_WORK(&glue->work, sunxi_musb_work);
 	glue->host_nb.notifier_call = sunxi_musb_host_notifier;
 
-	if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb"))
+	if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb") ||
+	    of_device_is_compatible(np, "allwinner,suniv-musb")) {
 		set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags);
+	}
 
 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb"))
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 
 	if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb") ||
-	    of_device_is_compatible(np, "allwinner,sun8i-h3-musb")) {
+	    of_device_is_compatible(np, "allwinner,sun8i-h3-musb") ||
+	    of_device_is_compatible(np, "allwinner,suniv-musb")) {
 		set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
 		set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags);
 	}
@@ -812,6 +815,7 @@ static int sunxi_musb_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id sunxi_musb_match[] = {
+	{ .compatible = "allwinner,suniv-musb", },
 	{ .compatible = "allwinner,sun4i-a10-musb", },
 	{ .compatible = "allwinner,sun6i-a31-musb", },
 	{ .compatible = "allwinner,sun8i-a33-musb", },
```

上記のように`suniv-f1c100s-licheepi-nano.dts` `suniv-f1c100s.dtsi` `phy-sun4i-usb.c` `sunxi.c`を修正してビルドすればUSBデバイスを認識するようになる