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usb: host: tegra: Reset Tegra USB controller before init

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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>
This commit is contained in:
Venu Byravarasu 2013-04-03 16:11:12 +05:30 committed by Greg Kroah-Hartman
parent e6604a7fd7
commit eb5369edca
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/host/ehci-tegra.c
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@ -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");