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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>
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@ -28,6 +28,7 @@
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#include <linux/pm_runtime.h>
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#include <linux/usb/ehci_def.h>
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#include <linux/usb/tegra_usb_phy.h>
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#include <linux/clk/tegra.h>
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#define TEGRA_USB_BASE 0xC5000000
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#define TEGRA_USB2_BASE 0xC5004000
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@ -691,6 +692,10 @@ static int tegra_ehci_probe(struct platform_device *pdev)
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if (err)
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goto fail_clk;
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tegra_periph_reset_assert(tegra->clk);
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udelay(1);
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tegra_periph_reset_deassert(tegra->clk);
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tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
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"nvidia,needs-double-reset");
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