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Commit 09adcdf2 authored by Viresh Kumar's avatar Viresh Kumar Committed by Hans-Christian Egtvedt
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AVR32/time: Migrate to new 'set-state' interface 



Migrate avr32 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.

We want to call cpu_idle_poll_ctrl() in shutdown only if we were in
oneshot or resume state earlier. Create another variable to save this
information and check that in shutdown callback.

Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Acked-by: default avatarHans-Christian Egtvedt <egtvedt@samfundet.no>
parent 52721d9d

arch/avr32/kernel/time.c

+33 −32
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 


#include <mach/pm.h>



static bool disable_cpu_idle_poll;



static cycle_t read_cycle_count(struct clocksource *cs)

{
@@ -80,36 +81,34 @@ static int comparator_next_event(unsigned long delta, 
	return 0;

}



static void comparator_mode(enum clock_event_mode mode,

		struct clock_event_device *evdev)

static int comparator_shutdown(struct clock_event_device *evdev)

{

	switch (mode) {

	case CLOCK_EVT_MODE_ONESHOT:

		pr_debug("%s: start\n", evdev->name);

		/* FALLTHROUGH */

	case CLOCK_EVT_MODE_RESUME:

		/*

		 * If we're using the COUNT and COMPARE registers we

		 * need to force idle poll.

		 */

		cpu_idle_poll_ctrl(true);

		break;

	case CLOCK_EVT_MODE_UNUSED:

	case CLOCK_EVT_MODE_SHUTDOWN:

	pr_debug("%s: %s\n", __func__, evdev->name);

	sysreg_write(COMPARE, 0);

		pr_debug("%s: stop\n", evdev->name);

		if (evdev->mode == CLOCK_EVT_MODE_ONESHOT ||

		    evdev->mode == CLOCK_EVT_MODE_RESUME) {



	if (disable_cpu_idle_poll) {

		disable_cpu_idle_poll = false;

		/*

		 * Only disable idle poll if we have forced that

		 * in a previous call.

		 */

		cpu_idle_poll_ctrl(false);

	}

		break;

	default:

		BUG();

	return 0;

}



static int comparator_set_oneshot(struct clock_event_device *evdev)

{

	pr_debug("%s: %s\n", __func__, evdev->name);



	disable_cpu_idle_poll = true;

	/*

	 * If we're using the COUNT and COMPARE registers we

	 * need to force idle poll.

	 */

	cpu_idle_poll_ctrl(true);



	return 0;

}



static struct clock_event_device comparator = {
@@ -118,7 +117,9 @@ static struct clock_event_device comparator = { 
	.shift			= 16,

	.rating			= 50,

	.set_next_event		= comparator_next_event,

	.set_mode	= comparator_mode,

	.set_state_shutdown	= comparator_shutdown,

	.set_state_oneshot	= comparator_set_oneshot,

	.tick_resume		= comparator_set_oneshot,

};



void read_persistent_clock(struct timespec *ts)