usb: musb: add Kconfig options for HOST, GAGDET or DUAL_ROLE modes

This makes building the actual object files optional to the selected
mode, which saves users who know which kind of USB mode support they
need some binary size.

Unimplemented functions are stubbed out with static inline functions.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 06f8d29af1ef..797e3fd45510 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -28,6 +28,35 @@ config USB_MUSB_HDRC
 if USB_MUSB_HDRC
 
 choice
+        bool "MUSB Mode Selection"
+        default USB_MUSB_DUAL_ROLE if (USB && USB_GADGET)
+        default USB_MUSB_HOST if (USB && !USB_GADGET)
+        default USB_MUSB_GADGET if (!USB && USB_GADGET)
+
+config USB_MUSB_HOST
+        bool "Host only mode"
+        depends on USB
+        help
+          Select this when you want to use MUSB in host mode only,
+          thereby the gadget feature will be regressed.
+
+config USB_MUSB_GADGET
+        bool "Gadget only mode"
+        depends on USB_GADGET
+        help
+          Select this when you want to use MUSB in gadget mode only,
+          thereby the host feature will be regressed.
+
+config USB_MUSB_DUAL_ROLE
+        bool "Dual Role mode"
+        depends on (USB && USB_GADGET)
+        help
+          This is the default mode of working of MUSB controller where
+          both host and gadget features are enabled.
+
+endchoice
+
+choice
         prompt "Platform Glue Layer"
 
 config USB_MUSB_DAVINCI