Commit ae281cbd authored by Marc Zyngier's avatar Marc Zyngier Committed by Rafael J. Wysocki
Browse files

clocksource / arm_arch_timer: Convert to ACPI probing 



It is now absolutely trivial to convert the arch timer driver to
use ACPI probing, just like its DT counterpart.

Let's enjoy another crapectomy.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent aad83b15

arch/arm64/kernel/time.c

+0 −6
Original line number Diff line number Diff line
@@ -71,12 +71,6 @@ void __init time_init(void) 


	tick_setup_hrtimer_broadcast();



	/*

	 * Since ACPI or FDT will only one be available in the system,

	 * we can use acpi_generic_timer_init() here safely

	 */

	acpi_generic_timer_init();



	arch_timer_rate = arch_timer_get_rate();

	if (!arch_timer_rate)

		panic("Unable to initialise architected timer.\n");

drivers/clocksource/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -131,6 +131,7 @@ config CLKSRC_STM32 
config ARM_ARCH_TIMER

	bool

	select CLKSRC_OF if OF

	select CLKSRC_ACPI if ACPI



config ARM_ARCH_TIMER_EVTSTREAM

	bool "Support for ARM architected timer event stream generation"

drivers/clocksource/arm_arch_timer.c

+1 −9
Original line number Diff line number Diff line
@@ -864,13 +864,5 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) 
	arch_timer_init();

	return 0;

}



/* Initialize all the generic timers presented in GTDT */

void __init acpi_generic_timer_init(void)

{

	if (acpi_disabled)

		return;



	acpi_table_parse(ACPI_SIG_GTDT, arch_timer_acpi_init);

}

CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init);

#endif

include/linux/clocksource.h

+0 −6
Original line number Diff line number Diff line
@@ -252,12 +252,6 @@ extern void clocksource_of_init(void); 
static inline void clocksource_of_init(void) {}

#endif



#ifdef CONFIG_ACPI

void acpi_generic_timer_init(void);

#else

static inline void acpi_generic_timer_init(void) { }

#endif



#define CLOCKSOURCE_ACPI_DECLARE(name, table_id, fn)		\

	ACPI_DECLARE_PROBE_ENTRY(clksrc, name, table_id, 0, NULL, 0, fn)

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