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/*
* (C) Copyright 2011 - Franck JULLIEN <elec4fun@gmail.com>
*
* 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 as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <clock.h>
#include <init.h>
#include <asm/system.h>
#include <asm/openrisc_exc.h>
static uint64_t openrisc_clocksource_read(void)
{
return (uint64_t)(mfspr(SPR_TTCR));
}
static struct clocksource cs = {
.read = openrisc_clocksource_read,
.mask = 0xffffffff,
.shift = 12,
};
static int clocksource_init(void)
{
mtspr(SPR_TTMR, SPR_TTMR_CR | 0xFFFFFF);
cs.mult = clocksource_hz2mult(OPENRISC_TIMER_FREQ, cs.shift);
init_clock(&cs);
return 0;
}
core_initcall(clocksource_init);
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