[MIPS] time: Code cleanups
* Do not include unnecessary headers. * Do not mention time.README. * Do not mention mips_timer_ack. * Make clocksource_mips static. It is now dedicated to c0_timer. * Initialize clocksource_mips.read statically. * Remove null_hpt_read. * Remove an argument of plat_timer_setup. It is just a placeholder. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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@ -3,8 +3,7 @@
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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* Copyright (c) 2003, 2004 Maciej W. Rozycki
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*
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* Common time service routines for MIPS machines. See
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* Documentation/mips/time.README.
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* Common time service routines for MIPS machines.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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@ -18,28 +17,17 @@
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/param.h>
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#include <linux/profile.h>
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#include <linux/time.h>
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#include <linux/timex.h>
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#include <linux/smp.h>
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#include <linux/kernel_stat.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kallsyms.h>
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#include <asm/bootinfo.h>
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#include <asm/cache.h>
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#include <asm/compiler.h>
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#include <asm/cpu.h>
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#include <asm/cpu-features.h>
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#include <asm/div64.h>
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#include <asm/sections.h>
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#include <asm/smtc_ipi.h>
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#include <asm/time.h>
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#include <irq.h>
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/*
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* forward reference
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*/
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@ -62,14 +50,6 @@ int update_persistent_clock(struct timespec now)
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return rtc_mips_set_mmss(now.tv_sec);
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}
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/*
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* Null high precision timer functions for systems lacking one.
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*/
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static cycle_t null_hpt_read(void)
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{
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return 0;
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}
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/*
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* High precision timer functions for a R4k-compatible timer.
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*/
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@ -104,6 +84,13 @@ EXPORT_SYMBOL(perf_irq);
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unsigned int mips_hpt_frequency;
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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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static unsigned int __init calibrate_hpt(void)
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{
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cycle_t frequency, hpt_start, hpt_end, hpt_count, hz;
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@ -146,12 +133,6 @@ static unsigned int __init calibrate_hpt(void)
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return frequency >> log_2_loops;
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}
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struct clocksource clocksource_mips = {
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.name = "MIPS",
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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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void __init clocksource_set_clock(struct clocksource *cs, unsigned int clock)
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{
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u64 temp;
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@ -187,9 +168,6 @@ void __cpuinit clockevent_set_clock(struct clock_event_device *cd,
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static void __init init_mips_clocksource(void)
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{
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if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
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return;
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/* Calclate a somewhat reasonable rating value */
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clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
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@ -211,7 +189,7 @@ void __init __weak plat_time_init(void)
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* setup_irq calls and each clock_event_device should use its own
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* struct irqrequest.
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*/
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void __init plat_timer_setup(struct irqaction *irq)
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void __init plat_timer_setup(void)
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{
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BUG();
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}
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@ -220,21 +198,8 @@ void __init time_init(void)
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{
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plat_time_init();
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/* Choose appropriate high precision timer routines. */
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if (!cpu_has_counter && !clocksource_mips.read)
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/* No high precision timer -- sorry. */
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clocksource_mips.read = null_hpt_read;
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else if (!mips_hpt_frequency && !mips_timer_state) {
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/* A high precision timer of unknown frequency. */
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if (!clocksource_mips.read)
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/* No external high precision timer -- use R4k. */
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clocksource_mips.read = c0_hpt_read;
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} else {
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if (cpu_has_counter && (mips_hpt_frequency || mips_timer_state)) {
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/* We know counter frequency. Or we can get it. */
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if (!clocksource_mips.read) {
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/* No external high precision timer -- use R4k. */
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clocksource_mips.read = c0_hpt_read;
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}
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if (!mips_hpt_frequency)
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mips_hpt_frequency = calibrate_hpt();
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@ -242,8 +207,8 @@ void __init time_init(void)
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printk("Using %u.%03u MHz high precision timer.\n",
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((mips_hpt_frequency + 500) / 1000) / 1000,
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((mips_hpt_frequency + 500) / 1000) % 1000);
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init_mips_clocksource();
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}
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init_mips_clocksource();
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mips_clockevent_init();
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}
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@ -1,4 +1,5 @@
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/linkage.h>
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#include <asm/i8259.h>
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@ -10,15 +10,10 @@
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Please refer to Documentation/mips/time.README.
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*/
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#ifndef _ASM_TIME_H
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#define _ASM_TIME_H
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#include <linux/interrupt.h>
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#include <linux/linkage.h>
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#include <linux/ptrace.h>
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#include <linux/rtc.h>
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#include <linux/spinlock.h>
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#include <linux/clockchips.h>
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@ -38,20 +33,12 @@ extern int rtc_mips_set_mmss(unsigned long);
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/*
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* Timer interrupt functions.
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* mips_timer_state is needed for high precision timer calibration.
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* mips_timer_ack may be NULL if the interrupt is self-recoverable.
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*/
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extern int (*mips_timer_state)(void);
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/*
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* High precision timer clocksource.
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* If .read is NULL, an R4k-compatible timer setup is attempted.
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*/
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extern struct clocksource clocksource_mips;
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/*
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* board specific routines required by time_init().
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*/
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struct irqaction;
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extern void plat_time_init(void);
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/*
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