47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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* (C) Copyright 2011 - Franck JULLIEN <elec4fun@gmail.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <clock.h>
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#include <init.h>
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#include <asm/system.h>
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#include <asm/openrisc_exc.h>
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static uint64_t openrisc_clocksource_read(void)
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{
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return (uint64_t)(mfspr(SPR_TTCR));
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}
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static struct clocksource cs = {
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.read = openrisc_clocksource_read,
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.mask = 0xffffffff,
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.shift = 12,
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};
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static int clocksource_init(void)
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{
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mtspr(SPR_TTMR, SPR_TTMR_CR | 0xFFFFFF);
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cs.mult = clocksource_hz2mult(OPENRISC_TIMER_FREQ, cs.shift);
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init_clock(&cs);
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return 0;
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}
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core_initcall(clocksource_init);
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