Merge branch 'next' of https://source.denx.de/u-boot/custodians/u-boot-usb into next

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 7a03435ba77..e5fe949f254 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -249,6 +249,37 @@ static void remove_inactive_children(struct uclass *uc, struct udevice *bus)
 	}
 }
 
+static int usb_probe_companion(struct udevice *bus)
+{
+	struct udevice *companion_dev;
+	int ret;
+
+	/*
+	 * Enforce optional companion controller is marked as such in order to
+	 * 1st scan the primary controller, before the companion controller
+	 * (ownership is given to companion when low or full speed devices
+	 * have been detected).
+	 */
+	ret = uclass_get_device_by_phandle(UCLASS_USB, bus, "companion", &companion_dev);
+	if (!ret) {
+		struct usb_bus_priv *companion_bus_priv;
+
+		debug("%s is the companion of %s\n", companion_dev->name, bus->name);
+		companion_bus_priv = dev_get_uclass_priv(companion_dev);
+		companion_bus_priv->companion = true;
+	} else if (ret && ret != -ENOENT && ret != -ENODEV) {
+		/*
+		 * Treat everything else than no companion or disabled
+		 * companion as an error. (It may not be enabled on boards
+		 * that have a High-Speed HUB to handle FS and LS traffic).
+		 */
+		printf("Failed to get companion (ret=%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 int usb_init(void)
 {
 	int controllers_initialized = 0;
@@ -299,6 +330,11 @@ int usb_init(void)
 			printf("probe failed, error %d\n", ret);
 			continue;
 		}
+
+		ret = usb_probe_companion(bus);
+		if (ret)
+			continue;
+
 		controllers_initialized++;
 		usb_started = true;
 	}