diff options
| author | Venkat Moganty <vmoganty@nvidia.com> | 2011-08-05 19:21:08 +0530 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-08-05 18:12:51 -0700 |
| commit | 032b86dab0e0f38f2cc1321bc39803f7f5e08010 (patch) | |
| tree | fe7085cff919aadf508b064893182b04cc3a8f6c | |
| parent | eb81b378963b209d5fcea63d44403c726532f712 (diff) | |
usb: ehci: tegra: Read port speed from hostpc register
During system suspend USB port speed need to be stored. If controller has hostpc
then port speed should be read from the hostpc register instead of portsc.
Bug 854000
Change-Id: Ic5c2c7eb11c923a64efe98f3b7006400db5ca50b
Reviewed-on: http://git-master/r/45533
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index ea43059fdb4d..71bc2b905b6b 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -44,6 +44,7 @@ #define STS_SRI (1<<7) /* SOF Recieved */ #define TEGRA_HSIC_CONNECTION_MAX_RETRIES 5 +#define HOSTPC_REG_OFFSET 0x1b4 struct tegra_ehci_hcd { struct ehci_hcd *ehci; @@ -369,7 +370,10 @@ static int tegra_usb_suspend(struct usb_hcd *hcd, bool is_dpd) spin_lock_irqsave(&tegra->ehci->lock, flags); - tegra->port_speed = (readl(&hw->port_status[0]) >> 26) & 0x3; + if (tegra->ehci->has_hostpc) + tegra->port_speed = (readl(hcd->regs + HOSTPC_REG_OFFSET) >> 25) & 0x3; + else + tegra->port_speed = (readl(&hw->port_status[0]) >> 26) & 0x3; ehci_halt(tegra->ehci); spin_unlock_irqrestore(&tegra->ehci->lock, flags); |