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authorMarc Zyngier <Marc.Zyngier@arm.com>2015-09-28 15:49:17 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-10-01 02:18:39 +0200
commitae281cbd2689200329afe2474b2f39f3f6eb54b9 (patch)
treeccf24acc47e81a4321491089c28b34101ced6dfb
parentaad83b15aa21f2d9e46b978b27bc63989e61202d (diff)
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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: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--arch/arm64/kernel/time.c6
-rw-r--r--drivers/clocksource/Kconfig1
-rw-r--r--drivers/clocksource/arm_arch_timer.c10
-rw-r--r--include/linux/clocksource.h6
4 files changed, 2 insertions, 21 deletions
diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c
index 149151fb42bb..819a105d3085 100644
--- a/arch/arm64/kernel/time.c
+++ b/arch/arm64/kernel/time.c
@@ -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");
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index fefedf15be03..1a9c5dc1e5f9 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -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"
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index d6e3e49399dd..c64d543d64bf 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -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
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 6eab6abf89b3..116645f746c1 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -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)