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x86/platform: Add a wallclock_init func to x86_platforms ops

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Some wall clock devices use MMIO based HW register, this new
function will give them a chance to do some initialization work
before their get/set_time service get called.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Feng Tang 2011-11-10 13:42:02 +00:00 committed by Ingo Molnar
parent 66f5ddf30a
commit cf8ff6b6ab
3 changed files with 6 additions and 0 deletions
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2
arch/x86/include/asm/x86_init.h
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@ -152,6 +152,7 @@ struct x86_cpuinit_ops {
/**
* struct x86_platform_ops - platform specific runtime functions
* @calibrate_tsc: calibrate TSC
* @wallclock_init: init the wallclock device
* @get_wallclock: get time from HW clock like RTC etc.
* @set_wallclock: set time back to HW clock
* @is_untracked_pat_range exclude from PAT logic
@ -160,6 +161,7 @@ struct x86_cpuinit_ops {
*/
struct x86_platform_ops {
unsigned long (*calibrate_tsc)(void);
void (*wallclock_init)(void);
unsigned long (*get_wallclock)(void);
int (*set_wallclock)(unsigned long nowtime);
void (*iommu_shutdown)(void);

2
arch/x86/kernel/setup.c
View file

@ -1045,6 +1045,8 @@ void __init setup_arch(char **cmdline_p)
x86_init.timers.wallclock_init();
x86_platform.wallclock_init();
mcheck_init();
arch_init_ideal_nops();

2
arch/x86/kernel/x86_init.c
View file

@ -27,6 +27,7 @@ void __init x86_init_uint_noop(unsigned int unused) { }
void __init x86_init_pgd_noop(pgd_t *unused) { }
int __init iommu_init_noop(void) { return 0; }
void iommu_shutdown_noop(void) { }
void wallclock_init_noop(void) { }
/*
* The platform setup functions are preset with the default functions
@ -97,6 +98,7 @@ static int default_i8042_detect(void) { return 1; };
struct x86_platform_ops x86_platform = {
.calibrate_tsc = native_calibrate_tsc,
.wallclock_init = wallclock_init_noop,
.get_wallclock = mach_get_cmos_time,
.set_wallclock = mach_set_rtc_mmss,
.iommu_shutdown = iommu_shutdown_noop,