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authorColin Ian King <colin.king@canonical.com>2012-07-30 16:06:42 +0100
committerBen Hutchings <ben@decadent.org.uk>2012-08-10 00:25:07 +0100
commit0776e23d7f8f42487a5c0fd42679cef115add2bc (patch)
tree0b05134a9856156978f6a93e546621d807207fdf
parent83358b9b1d3438293794224b14787a806031cf98 (diff)
USB: echi-dbgp: increase the controller wait time to come out of halt.
commit f96a4216e85050c0a9d41a41ecb0ae9d8e39b509 upstream. The default 10 microsecond delay for the controller to come out of halt in dbgp_ehci_startup is too short, so increase it to 1 millisecond. This is based on emperical testing on various USB debug ports on modern machines such as a Lenovo X220i and an Ivybridge development platform that needed to wait ~450-950 microseconds. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
-rw-r--r--drivers/usb/early/ehci-dbgp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index 1fc8f1249806..347bb058e1ee 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -450,7 +450,7 @@ static int dbgp_ehci_startup(void)
writel(FLAG_CF, &ehci_regs->configured_flag);
/* Wait until the controller is no longer halted */
- loop = 10;
+ loop = 1000;
do {
status = readl(&ehci_regs->status);
if (!(status & STS_HALT))