Commit 6b617e22 authored by Feng Tang's avatar Feng Tang Committed by Thomas Gleixner
Browse files

x86/platform: Add a wallclock_init func to x86_init.timers ops 



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, which is usually
in early kernel boot phase.

Signed-off-by: default avatarFeng Tang <feng.tang@intel.com>
Signed-off-by: default avatarJacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 991cfffa

arch/x86/include/asm/x86_init.h

+2 −0
Original line number Diff line number Diff line
@@ -83,11 +83,13 @@ struct x86_init_paging { 
 *				boot cpu

 * @tsc_pre_init:		platform function called before TSC init

 * @timer_init:			initialize the platform timer (default PIT/HPET)

 * @wallclock_init:		init the wallclock device

 */

struct x86_init_timers {

	void (*setup_percpu_clockev)(void);

	void (*tsc_pre_init)(void);

	void (*timer_init)(void);

	void (*wallclock_init)(void);

};



/**

arch/x86/kernel/setup.c

+2 −0
Original line number Diff line number Diff line
@@ -1059,6 +1059,8 @@ void __init setup_arch(char **cmdline_p) 
#endif

	x86_init.oem.banner();



	x86_init.timers.wallclock_init();



	mcheck_init();



	local_irq_save(flags);

arch/x86/kernel/x86_init.c

+1 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ struct x86_init_ops x86_init __initdata = { 
		.setup_percpu_clockev	= setup_boot_APIC_clock,

		.tsc_pre_init		= x86_init_noop,

		.timer_init		= hpet_time_init,

		.wallclock_init		= x86_init_noop,

	},



	.iommu = {

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