[RFC PATCH 08/10] dm: usb: move bus initialization into new static function usb_init_bus()

[Jerome Forissier]

To prepare for the introduction of coroutines in the USB initialization
sequence, move code out of usb_init() into a new helper function:
usb_init_bus(). No functional change.

Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
---
 drivers/usb/host/usb-uclass.c | 88 +++++++++++++++++++----------------
 1 file changed, 48 insertions(+), 40 deletions(-)

diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index bfec303e7af..cc803241461 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -287,9 +287,55 @@ static int usb_probe_companion(struct udevice *bus)
 	return 0;
 }
 
+static int controllers_initialized;
+
+static void usb_init_bus(struct udevice *bus)
+{
+	int ret;
+
+	/* init low_level USB */
+	printf("Bus %s: ", bus->name);
+
+	/*
+	 * For Sandbox, we need scan the device tree each time when we
+	 * start the USB stack, in order to re-create the emulated USB
+	 * devices and bind drivers for them before we actually do the
+	 * driver probe.
+	 *
+	 * For USB onboard HUB, we need to do some non-trivial init
+	 * like enabling a power regulator, before enumeration.
+	 */
+	if (IS_ENABLED(CONFIG_SANDBOX) ||
+	    IS_ENABLED(CONFIG_USB_ONBOARD_HUB)) {
+		ret = dm_scan_fdt_dev(bus);
+		if (ret) {
+			printf("USB device scan from fdt failed (%d)", ret);
+			return;
+		}
+	}
+
+	ret = device_probe(bus);
+	if (ret == -ENODEV) {	/* No such device. */
+		puts("Port not available.\n");
+		controllers_initialized++;
+		return;
+	}
+
+	if (ret) {		/* Other error. */
+		printf("probe failed, error %d\n", ret);
+		return;
+	}
+
+	ret = usb_probe_companion(bus);
+	if (ret)
+		return;
+
+	controllers_initialized++;
+	usb_started = true;
+}
+
 int usb_init(void)
 {
-	int controllers_initialized = 0;
 	struct usb_uclass_priv *uc_priv;
 	struct usb_bus_priv *priv;
 	struct udevice *bus;
@@ -305,45 +351,7 @@ int usb_init(void)
 	uc_priv = uclass_get_priv(uc);
 
 	uclass_foreach_dev(bus, uc) {
-		/* init low_level USB */
-		printf("Bus %s: ", bus->name);
-
-		/*
-		 * For Sandbox, we need scan the device tree each time when we
-		 * start the USB stack, in order to re-create the emulated USB
-		 * devices and bind drivers for them before we actually do the
-		 * driver probe.
-		 *
-		 * For USB onboard HUB, we need to do some non-trivial init
-		 * like enabling a power regulator, before enumeration.
-		 */
-		if (IS_ENABLED(CONFIG_SANDBOX) ||
-		    IS_ENABLED(CONFIG_USB_ONBOARD_HUB)) {
-			ret = dm_scan_fdt_dev(bus);
-			if (ret) {
-				printf("USB device scan from fdt failed (%d)", ret);
-				continue;
-			}
-		}
-
-		ret = device_probe(bus);
-		if (ret == -ENODEV) {	/* No such device. */
-			puts("Port not available.\n");
-			controllers_initialized++;
-			continue;
-		}
-
-		if (ret) {		/* Other error. */
-			printf("probe failed, error %d\n", ret);
-			continue;
-		}
-
-		ret = usb_probe_companion(bus);
-		if (ret)
-			continue;
-
-		controllers_initialized++;
-		usb_started = true;
+		usb_init_bus(bus);
 	}
 
 	/*
-- 
2.43.0