usb: fotg210: Select subdriver by mode

Check which mode the hardware is in, and selecte the peripheral
driver if the hardware is in explicit peripheral mode, otherwise
select host mode.

This should solve the immediate problem that both subdrivers
can get probed.

Cc: Fabian Vogt <fabian@ritter-vogt.de>
Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com>
Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221023144708.3596563-3-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/fotg210/fotg210-core.c

@@ -10,30 +10,37 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/usb.h>
+#include <linux/usb/otg.h>
 
 #include "fotg210.h"
 
 static int fotg210_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
+	enum usb_dr_mode mode;
 	int ret;
 
-	if (IS_ENABLED(CONFIG_USB_FOTG210_HCD)) {
-		ret = fotg210_hcd_probe(pdev);
-		if (ret)
-			return ret;
-	}
-	if (IS_ENABLED(CONFIG_USB_FOTG210_UDC))
+	mode = usb_get_dr_mode(dev);
+
+	if (mode == USB_DR_MODE_PERIPHERAL)
 		ret = fotg210_udc_probe(pdev);
+	else
+		ret = fotg210_hcd_probe(pdev);
 
 	return ret;
 }
 
 static int fotg210_remove(struct platform_device *pdev)
 {
-	if (IS_ENABLED(CONFIG_USB_FOTG210_HCD))
-		fotg210_hcd_remove(pdev);
-	if (IS_ENABLED(CONFIG_USB_FOTG210_UDC))
+	struct device *dev = &pdev->dev;
+	enum usb_dr_mode mode;
+
+	mode = usb_get_dr_mode(dev);
+
+	if (mode == USB_DR_MODE_PERIPHERAL)
 		fotg210_udc_remove(pdev);
+	else
+		fotg210_hcd_remove(pdev);
 
 	return 0;
 }