diff options
| author | Venu Byravarasu <vbyravarasu@nvidia.com> | 2013-04-03 14:41:12 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-03 22:40:59 +0400 |
| commit | eb5369edca4f4307a6035dc6f6813698b0762906 (patch) | |
| tree | c588756f7a8b16ece0ea92d595176d0bc387961e /drivers | |
| parent | e6604a7fd71f9bd2890e07800e191167d7f5751b (diff) | |
| download | linux-eb5369edca4f4307a6035dc6f6813698b0762906.tar.xz | |
usb: host: tegra: Reset Tegra USB controller before init
To clear any configurations made by U-Boot on Tegra USB controller,
reset it before init in probe.
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 568aecc7075b..83d190a1cafd 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -28,6 +28,7 @@ #include <linux/pm_runtime.h> #include <linux/usb/ehci_def.h> #include <linux/usb/tegra_usb_phy.h> +#include <linux/clk/tegra.h> #define TEGRA_USB_BASE 0xC5000000 #define TEGRA_USB2_BASE 0xC5004000 @@ -691,6 +692,10 @@ static int tegra_ehci_probe(struct platform_device *pdev) if (err) goto fail_clk; + tegra_periph_reset_assert(tegra->clk); + udelay(1); + tegra_periph_reset_deassert(tegra->clk); + tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node, "nvidia,needs-double-reset"); |