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e69841fa71
Rockchip RK3288 and RK3506 contain two DWC2 USB controllers, typically
one controller use dr_mode=otg and the other one use dr_mode=host.
With USB_GADGET_DWC2_OTG, DM_USB_GADGET and USB_DWC2 enabled this result
in the dwc2-udc-otg driver binding to both controllers, however only one
will probe due to use of dr_mode=host on the other one.
After the commit 6668b8e7cc68 ("dm: core: Support multiple drivers with
same compatibles") it is possible to bind one controller to the
dwc2-udc-otg driver and the other one to the dwc2_usb driver.
Move the dr_mode check from of_to_plat() to bind() to allow dm core to
bind the dwc2 host driver to dr_mode=host controllers.
Before this:
=> dm tree
...
usb_gadget 0 [ ] dwc2-udc-otg | |-- usb@ff740000
usb_gadget 1 [ ] dwc2-udc-otg | |-- usb@ff780000
=> usb start
starting USB...
No USB controllers found
After this:
dwc2-udc-otg usb@ff780000: Invalid dr_mode 1
=> dm tree
...
usb_gadget 0 [ ] dwc2-udc-otg | |-- usb@ff740000
usb 0 [ ] dwc2_usb | |-- usb@ff780000
=> usb start
starting USB...
USB DWC2
Bus usb@ff780000: 1 USB Device(s) found
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
Reviewed-by: Marek Vasut <marek.vasut@mailbox.org>
Link: https://lore.kernel.org/r/20260129195207.2260264-1-jonas@kwiboo.se
Signed-off-by: Mattijs Korpershoek <mkorpershoek@kernel.org>