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Commit aeec6cda authored by Viresh Kumar's avatar Viresh Kumar Committed by Vineet Gupta
Browse files

ARC/time: Migrate to new 'set-state' interface 



Migrate arc driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

Cc: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 52721d9d

arch/arc/kernel/time.c

+15 −25
Original line number Diff line number Diff line
@@ -203,34 +203,24 @@ static int arc_clkevent_set_next_event(unsigned long delta, 
	return 0;

}



static void arc_clkevent_set_mode(enum clock_event_mode mode,

				  struct clock_event_device *dev)

static int arc_clkevent_set_periodic(struct clock_event_device *dev)

{

	switch (mode) {

	case CLOCK_EVT_MODE_PERIODIC:

	/*

	 * At X Hz, 1 sec = 1000ms -> X cycles;

	 *		      10ms -> X / 100 cycles

	 */

	arc_timer_event_setup(arc_get_core_freq() / HZ);

		break;

	case CLOCK_EVT_MODE_ONESHOT:

		break;

	default:

		break;

	}



	return;

	return 0;

}



static DEFINE_PER_CPU(struct clock_event_device, arc_clockevent_device) = {

	.name			= "ARC Timer0",

	.features	= CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,

	.mode		= CLOCK_EVT_MODE_UNUSED,

	.features		= CLOCK_EVT_FEAT_ONESHOT |

				  CLOCK_EVT_FEAT_PERIODIC,

	.rating			= 300,

	.irq			= TIMER0_IRQ,	/* hardwired, no need for resources */

	.set_next_event		= arc_clkevent_set_next_event,

	.set_mode	= arc_clkevent_set_mode,

	.set_state_periodic	= arc_clkevent_set_periodic,

};



static irqreturn_t timer_irq_handler(int irq, void *dev_id)
@@ -240,7 +230,7 @@ static irqreturn_t timer_irq_handler(int irq, void *dev_id) 
	 * irq_set_chip_and_handler() asked for handle_percpu_devid_irq()

	 */

	struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);

	int irq_reenable = evt->mode == CLOCK_EVT_MODE_PERIODIC;

	int irq_reenable = clockevent_state_periodic(evt);



	/*

	 * Any write to CTRL reg ACks the interrupt, we rewrite the