57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2011 Antony Pavlov <antonynpavlov@gmail.com>
|
|
*
|
|
* This file is part of barebox.
|
|
* See file CREDITS for list of people who contributed to this project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Clocksource based on Tegra internal timer
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clock.h>
|
|
#include <linux/list.h>
|
|
#include <linux/clk.h>
|
|
#include <init.h>
|
|
#include <asm/io.h>
|
|
#include <mach/iomap.h>
|
|
|
|
static void __iomem *timer_reg_base = (void __iomem *) (TEGRA_TMR1_BASE);
|
|
|
|
#define timer_writel(value, reg) \
|
|
__raw_writel(value, (u32)timer_reg_base + (reg))
|
|
#define timer_readl(reg) \
|
|
__raw_readl((u32)timer_reg_base + (reg))
|
|
|
|
static uint64_t tegra_clocksource_read(void)
|
|
{
|
|
return timer_readl(0x10);
|
|
}
|
|
|
|
static struct clocksource cs = {
|
|
.read = tegra_clocksource_read,
|
|
.mask = 0xffffffff,
|
|
};
|
|
|
|
/* FIXME: here we have no initialization. All initialization made by U-Boot */
|
|
static int clocksource_init(void)
|
|
{
|
|
cs.mult = clocksource_hz2mult(1000000, cs.shift);
|
|
init_clock(&cs);
|
|
|
|
return 0;
|
|
}
|
|
core_initcall(clocksource_init);
|