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Commit eb5369ed authored by Venu Byravarasu's avatar Venu Byravarasu Committed by Greg Kroah-Hartman
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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: default avatarVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e6604a7f

drivers/usb/host/ehci-tegra.c

+5 −0
Original line number Diff line number Diff line
@@ -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");