subsys: usb: host: Add accessory support for host hub

Add support for usb host hub class.

Signed-off-by: Aiden Hu <[email protected]>

Author: AidenHu

subsys/usb/host/CMakeLists.txt

@@ -18,6 +18,12 @@ zephyr_library_sources_ifdef(
   usbh_shell.c
 )
 
+zephyr_library_sources_ifdef(
+	CONFIG_USBH_HUB_CLASS
+	class/usbh_hub.c
+	class/usbh_hub_mgr.c
+)
+
 zephyr_library_sources_ifdef(
   CONFIG_USBIP
   usbip.c

subsys/usb/host/class/Kconfig

@@ -0,0 +1,6 @@
+#
+# Copyright 2025 NXP
+# SPDX-License-Identifier: Apache-2.0
+#
+
+rsource "Kconfig.hub_host"

subsys/usb/host/class/Kconfig.hub_host

@@ -0,0 +1,36 @@
+#
+# Copyright 2025 NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config USBH_HUB_CLASS
+	bool "USB Host Hub Class Driver"
+	default n
+	help
+	  Enable USB Host Hub Class driver support.
+	  This allows connecting USB hubs and managing downstream devices.
+
+if USBH_HUB_CLASS
+
+config USBH_HUB_MAX_LEVELS
+	int "Maximum Hub chain depth"
+	default 5
+	range 1 5
+	help
+	  Maximum number of Hub levels allowed in the USB topology.
+	  The root HUB's level is 1. USB specification allows up to 5 levels.
+
+config USBH_HUB_INIT_PRIORITY
+	int "Hub manager initialization priority"
+	default 85
+	help
+	  Initialization priority for the Hub manager. Should be
+	  higher than the USB host stack but lower than device drivers
+
+module = USBH_HUB
+module-str = usbh hub
+default-count = 1
+source "subsys/logging/Kconfig.template.log_config"
+
+endif # USBH_HUB_CLASS