diff options
| author | Prashant Gaikwad <pgaikwad@nvidia.com> | 2011-04-13 10:44:47 +0530 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-04-13 18:04:53 -0700 |
| commit | 869ec1ee437d28fb58b9d06b1b0076446fe94d62 (patch) | |
| tree | a222437e1d7ea9261fc7f3bd42c46fd0547c200c /drivers/usb | |
| parent | 566c7a12ec0562158b68a4a07b82b248ee290cd2 (diff) | |
usb: otg: tegra: let the usb clock stabilize
add sleep to let the clock stabilize before handling interrupt.
Bug 814888
Change-Id: I7983017f04ad8b84eb6def0f4f7c580292e6e374
Reviewed-on: http://git-master/r/27592
Tested-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/otg/tegra-otg.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/otg/tegra-otg.c b/drivers/usb/otg/tegra-otg.c index 4e40d14f57cf..386bb8b922da 100644 --- a/drivers/usb/otg/tegra-otg.c +++ b/drivers/usb/otg/tegra-otg.c @@ -401,6 +401,11 @@ static int tegra_otg_resume(struct platform_device * pdev) tegra_otg_enable_clk(); + /* Following delay is intentional. + * It is placed here after observing system hang. + * Root cause is not confirmed. + */ + msleep(1); /* restore the interupt enable for cable ID and VBUS */ clk_enable(tegra_otg->clk); writel(tegra_otg->intr_reg_data, (tegra_otg->regs + USB_PHY_WAKEUP)); |