[PATCH v1 1/6] usb: dwc3: core: only provide legacy gadget IRQ handler when USB_DWC3_GADGET

[Stefan Eichenberger <eichest@gmail.com>]

From: Stefan Eichenberger <stefan.eichenberger@toradex.com>

Building a board with USB_DWC3=y (DWC3 used purely as an XHCI host
controller), USB_DWC3_GADGET unset, and DM_USB_GADGET disabled (e.g.
to use CONFIG_CI_UDC for a separate ChipIdea gadget/OTG controller)
fails to link:

drivers/usb/gadget/ci_udc.o: in function `dm_usb_gadget_handle_interrupts':
drivers/usb/gadget/ci_udc.c:983: multiple definition of `dm_usb_gadget_handle_interrupts';
drivers/usb/dwc3/core.o:drivers/usb/dwc3/core.c:1034: first defined here
drivers/usb/dwc3/core.o: in function `dm_usb_gadget_handle_interrupts':
drivers/usb/dwc3/core.c:1044: undefined reference to `dwc3_gadget_uboot_handle_interrupt'

Add "&& CONFIG_IS_ENABLED(USB_DWC3_GADGET)" to the guard so this code
is only compiled when the DWC3 gadget driver it depends on is actually
present, matching the Makefile dependency. Boards that combine DWC3
(host) with a separate legacy gadget driver like CI_UDC, with
DM_USB_GADGET disabled, now link correctly. Boards that already use
DWC3 in gadget mode without DM_USB_GADGET are unaffected since
USB_DWC3_GADGET is set for them.

Fixes: 4d1589808970 ("usb: udc: dwc3: Fold board dm_usb_gadget_handle_interrupts() into DWC3 gadget")
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
---
 drivers/usb/dwc3/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index be198041f08..9bff5149c5f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1016,7 +1016,7 @@ MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
 
-#if !CONFIG_IS_ENABLED(DM_USB_GADGET)
+#if !CONFIG_IS_ENABLED(DM_USB_GADGET) && CONFIG_IS_ENABLED(USB_DWC3_GADGET)
 __weak int dwc3_uboot_interrupt_status(struct udevice *dev)
 {
 	return 1;
-- 
2.55.0