From: Richard Zhao <richard.zhao@freescale.com>
Date: Wed, 12 Sep 2012 11:58:07 +0000 (+0300)
Subject: USB: chipidea: delay 2ms before read ID status at probe time
X-Git-Tag: v3.7-rc1~171^2~132
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86ad01a907d7856edc07d8b49260c39520c0e932;p=profile%2Fivi%2Fkernel-x86-ivi.git

USB: chipidea: delay 2ms before read ID status at probe time

The ID pin needs 1ms debounce time, even at probe time. We delay 2ms
to be on the safe side.

Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 1083585..3c3ed77 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -462,6 +462,8 @@ static int __devinit ci_hdrc_probe(struct platform_device *pdev)
 
 	if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
 		ci->is_otg = true;
+		/* ID pin needs 1ms debouce time, we delay 2ms for safe */
+		mdelay(2);
 		ci->role = ci_otg_role(ci);
 	} else {
 		ci->role = ci->roles[CI_ROLE_HOST]