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Commit 57e148ca authored by Viresh Kumar's avatar Viresh Kumar Committed by Ralf Baechle
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MIPS: cevt-sb1250: Migrate to new 'set-state' interface 



Migrate cevt-rsb1250 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.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linaro-kernel@lists.linaro.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Patchwork: https://patchwork.linux-mips.org/patch/10606/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 877c61dc

arch/mips/kernel/cevt-sb1250.c

+23 −22
Original line number Diff line number Diff line
@@ -38,8 +38,20 @@ 
 * The general purpose timer ticks at 1MHz independent if

 * the rest of the system

 */

static void sibyte_set_mode(enum clock_event_mode mode,

			   struct clock_event_device *evt)



static int sibyte_shutdown(struct clock_event_device *evt)

{

	void __iomem *cfg;



	cfg = IOADDR(A_SCD_TIMER_REGISTER(smp_processor_id(), R_SCD_TIMER_CFG));



	/* Stop the timer until we actually program a shot */

	__raw_writeq(0, cfg);



	return 0;

}



static int sibyte_set_periodic(struct clock_event_device *evt)

{

	unsigned int cpu = smp_processor_id();

	void __iomem *cfg, *init;
@@ -47,24 +59,11 @@ static void sibyte_set_mode(enum clock_event_mode mode, 
	cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));

	init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));



	switch (mode) {

	case CLOCK_EVT_MODE_PERIODIC:

	__raw_writeq(0, cfg);

	__raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);

		__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,

			     cfg);

		break;



	case CLOCK_EVT_MODE_ONESHOT:

		/* Stop the timer until we actually program a shot */

	case CLOCK_EVT_MODE_SHUTDOWN:

		__raw_writeq(0, cfg);

		break;

	__raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS, cfg);



	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */

	case CLOCK_EVT_MODE_RESUME:

		;

	}

	return 0;

}



static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
@@ -89,7 +88,7 @@ static irqreturn_t sibyte_counter_handler(int irq, void *dev_id) 
	void __iomem *cfg;

	unsigned long tmode;



	if (cd->mode == CLOCK_EVT_MODE_PERIODIC)

	if (clockevent_state_periodic(cd))

		tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;

	else

		tmode = 0;
@@ -129,7 +128,9 @@ void sb1250_clockevent_init(void) 
	cd->irq			= irq;

	cd->cpumask		= cpumask_of(cpu);

	cd->set_next_event	= sibyte_next_event;

	cd->set_mode		= sibyte_set_mode;

	cd->set_state_shutdown	= sibyte_shutdown;

	cd->set_state_periodic	= sibyte_set_periodic;

	cd->set_state_oneshot	= sibyte_shutdown;

	clockevents_register_device(cd);



	sb1250_mask_irq(cpu, irq);