[U-Boot] [PATCH 4/7] usb: Wait after sending Set Configuration request

[Marek Vasut <marex@denx.de>]

Some devices, like the SanDisk Cruzer Pop need some time to process
the Set Configuration request, so wait a little until they are ready.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Stephen Warren <swarren@nvidia.com>
---
 common/usb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/common/usb.c b/common/usb.c
index 63429d4..205041b 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -1107,6 +1107,14 @@ int usb_select_config(struct usb_device *dev)
 			"len %d, status %lX\n", dev->act_len, dev->status);
 		return err;
 	}
+
+	/*
+	 * Wait until the Set Configuration request gets processed by the
+	 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
+	 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
+	 */
+	mdelay(10);
+
 	debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
 	      dev->descriptor.iManufacturer, dev->descriptor.iProduct,
 	      dev->descriptor.iSerialNumber);
-- 
2.7.0