[PATCH 02/12] USB: chipidea: delay 2ms before read ID status at probe time
From: Richard Zhao <hidden>
Date: 2012-07-12 07:01:42
Subsystem:
chipidea usb high speed dual role controller, the rest, usb subsystem · Maintainers:
Peter Chen, Linus Torvalds, Greg Kroah-Hartman
The ID pin needs 1ms debounce time, event at probe time. We delay 2ms for safe. Signed-off-by: Richard Zhao <redacted> --- drivers/usb/chipidea/core.c | 2 ++ 1 file changed, 2 insertions(+)
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]
--
1.7.9.5