forked from Minki/linux
8e19608e8b
Pass clocksource pointer to the read() callback for clocksources. This allows us to share the callback between multiple instances. [hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods] [akpm@linux-foundation.org: cleanup] Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
39 lines
885 B
C
39 lines
885 B
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2007 by Ralf Baechle
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*/
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#include <linux/clocksource.h>
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#include <linux/init.h>
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#include <asm/time.h>
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static cycle_t c0_hpt_read(struct clocksource *cs)
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{
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return read_c0_count();
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}
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static struct clocksource clocksource_mips = {
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.name = "MIPS",
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.read = c0_hpt_read,
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.mask = CLOCKSOURCE_MASK(32),
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.flags = CLOCK_SOURCE_IS_CONTINUOUS,
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};
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int __init init_r4k_clocksource(void)
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{
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if (!cpu_has_counter || !mips_hpt_frequency)
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return -ENXIO;
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/* Calculate a somewhat reasonable rating value */
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clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
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clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);
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clocksource_register(&clocksource_mips);
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return 0;
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}
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