u-boot/arch/arm/include/asm/arch-tegra/timer.h

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/* Tegra20 timer functions */

#ifndef _TEGRA_TIMER_H
#define _TEGRA_TIMER_H

/* returns the current monotonic timer value in microseconds */
unsigned long timer_get_us(void);

#endif