From: Antti Palosaari <crope@iki.fi>
Date: Sun, 2 Jun 2013 22:41:46 +0000 (-0300)
Subject: upstream: [media] radio-keene: add delay in order to settle hardware
X-Git-Tag: submit/tizen/20141121.110247~2238
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=52365c8530daa07af7e2dc5ae7a3125f9ab2818c;p=platform%2Fkernel%2Flinux-3.10.git

upstream: [media] radio-keene: add delay in order to settle hardware

It was found by trial and error testing that at least 11 ms delay is
needed before first I/O, otherwise device will skip given command.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/radio/radio-keene.c b/drivers/media/radio/radio-keene.c
index 99da3d4..21db23b 100644
--- a/drivers/media/radio/radio-keene.c
+++ b/drivers/media/radio/radio-keene.c
@@ -382,6 +382,8 @@ static int usb_keene_probe(struct usb_interface *intf,
 	video_set_drvdata(&radio->vdev, radio);
 	set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags);
 
+	/* at least 11ms is needed in order to settle hardware */
+	msleep(20);
 	keene_cmd_main(radio, 95.16 * FREQ_MUL, false);
 
 	retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1);