Merge https://source.denx.de/u-boot/custodians/u-boot-usb

include/env_default.h

@@ -99,6 +99,17 @@ const char default_environment[] = {
 #ifdef CONFIG_SYS_SOC
 	"soc="		CONFIG_SYS_SOC			"\0"
 #endif
+#ifdef CONFIG_USB_HOST
+	"usb_ignorelist="
+#ifdef CONFIG_USB_KEYBOARD
+	/* Ignore Yubico devices. Currently only a single USB keyboard device is
+	 * supported and the emulated HID keyboard Yubikeys present is useless
+	 * as keyboard.
+	 */
+	"0x1050:*,"
+#endif
+	"\0"
+#endif
 #ifdef CONFIG_ENV_IMPORT_FDT
 	"env_fdt_path="	CONFIG_ENV_FDT_PATH		"\0"
 #endif

include/usb.h

@@ -49,6 +49,12 @@ extern bool usb_started; /* flag for the started/stopped USB status */
  */
 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
 
+/*
+ * The xhcd hcd driver prepares only a limited number interfaces / endpoints.
+ * Define this limit so that drivers do not exceed it.
+ */
+#define USB_MAX_ACTIVE_INTERFACES	2
+
 /* device request (setup) */
 struct devrequest {
 	__u8	requesttype;