[ARM] 3855/1: Add generic time support
This patch adds Generic time-of-day support for the ARM architecture. The support is currently added using #ifdef's so that it can support sub-arches that do not (yet) have a clocksource added. As sub-arches add clocksource support, they should 'select GENERIC_TIME' Signed-off-by: Deepak Saxena <dsaxena@mvista.com> Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Kevin Hilman <khilman@mvista.com> Acked-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -17,6 +17,10 @@ config ARM
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Europe. There is an ARM Linux project with a web page at
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<http://www.arm.linux.org.uk/>.
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config GENERIC_TIME
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bool
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default n
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config MMU
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bool
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default y
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@ -69,10 +69,12 @@ EXPORT_SYMBOL(profile_pc);
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*/
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int (*set_rtc)(void);
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#ifndef CONFIG_GENERIC_TIME
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static unsigned long dummy_gettimeoffset(void)
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{
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return 0;
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}
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#endif
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/*
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* Scheduler clock - returns current time in nanosec units.
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@ -230,6 +232,7 @@ static inline void do_leds(void)
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#define do_leds()
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#endif
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#ifndef CONFIG_GENERIC_TIME
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void do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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@ -291,6 +294,7 @@ int do_settimeofday(struct timespec *tv)
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}
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EXPORT_SYMBOL(do_settimeofday);
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#endif /* !CONFIG_GENERIC_TIME */
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/**
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* save_time_delta - Save the offset between system time and RTC time
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@ -500,8 +504,10 @@ device_initcall(timer_init_sysfs);
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void __init time_init(void)
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{
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#ifndef CONFIG_GENERIC_TIME
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if (system_timer->offset == NULL)
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system_timer->offset = dummy_gettimeoffset;
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#endif
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system_timer->init();
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#ifdef CONFIG_NO_IDLE_HZ
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@ -38,7 +38,9 @@ struct sys_timer {
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void (*init)(void);
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void (*suspend)(void);
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void (*resume)(void);
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#ifndef CONFIG_GENERIC_TIME
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unsigned long (*offset)(void);
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#endif
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#ifdef CONFIG_NO_IDLE_HZ
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struct dyn_tick_timer *dyn_tick;
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4
include/asm-arm/timeofday.h
Normal file
4
include/asm-arm/timeofday.h
Normal file
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@ -0,0 +1,4 @@
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#ifndef _ASM_ARM_TIMEOFDAY_H
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#define _ASM_ARM_TIMEOFDAY_H
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#include <asm-generic/timeofday.h>
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#endif
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