ARM: local timers: introduce a new registration interface (0ef330e1) · Commits · 戴 / test

arch/arm/include/asm/localtimer.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,11 @@

		struct clock_event_device;

		struct local_timer_ops {
		int (setup)(struct clock_event_device );
		void (stop)(struct clock_event_device );
		};

		/*
		* Setup a per-cpu timer, whether it be a local timer or dummy broadcast
		*/
		@@ -38,6 +43,11 @@ void local_timer_stop(struct clock_event_device *);
		*/
		int local_timer_setup(struct clock_event_device *);

		/*
		* Register a local timer driver
		*/
		int local_timer_register(struct local_timer_ops *);

		#else

		static inline int local_timer_setup(struct clock_event_device *evt)
		@@ -48,6 +58,11 @@ static inline int local_timer_setup(struct clock_event_device *evt)
		static inline void local_timer_stop(struct clock_event_device *evt)
		{
		}

		static inline int local_timer_register(struct local_timer_ops *ops)
		{
		return -ENXIO;
		}
		#endif

		#endif

+27 −0

Original line number	Diff line number	Diff line
		@@ -459,6 +459,33 @@ static void __cpuinit broadcast_timer_setup(struct clock_event_device *evt)
		clockevents_register_device(evt);
		}

		static struct local_timer_ops *lt_ops;

		#ifdef CONFIG_LOCAL_TIMERS
		int local_timer_register(struct local_timer_ops *ops)
		{
		if (lt_ops)
		return -EBUSY;

		lt_ops = ops;
		return 0;
		}
		#endif

		int __cpuinit __attribute__ ((weak)) local_timer_setup(struct clock_event_device *clk)
		{
		if (lt_ops)
		return lt_ops->setup(clk);

		return -ENXIO;
		}

		void __attribute__ ((weak)) local_timer_stop(struct clock_event_device *clk)
		{
		if (lt_ops)
		lt_ops->stop(clk);
		}

		void __cpuinit percpu_timer_setup(void)
		{
		unsigned int cpu = smp_processor_id();