linux-kernel - Re: [PATCH 41/41] clocksource: zevio: Migrate to new 'set-state' interface

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Date:	Fri, 3 Jul 2015 14:26:19 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Daniel Tang <dt.tangr@...il.com>
Subject: Re: [PATCH 41/41] clocksource: zevio: Migrate to new 'set-state'
 interface

On 02-07-15, 22:11, Daniel Lezcano wrote:
> On 06/18/2015 12:54 PM, Viresh Kumar wrote:
> >Migrate zevio 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: Daniel Tang <dt.tangr@...il.com>
> >Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> >---
> 
> [ ... ]
> 
> >  static irqreturn_t zevio_timer_interrupt(int irq, void *dev_id)
> >@@ -162,7 +158,9 @@ static int __init zevio_timer_add(struct device_node *node)
> >  	if (timer->interrupt_regs && irqnr) {
> >  		timer->clkevt.name		= timer->clockevent_name;
> >  		timer->clkevt.set_next_event	= zevio_timer_set_event;
> >-		timer->clkevt.set_mode		= zevio_timer_set_mode;
> >+		timer->clkevt.set_state_shutdown = zevio_timer_shutdown;
> >+		timer->clkevt.set_state_oneshot = zevio_timer_set_oneshot;
> >+		timer->clkevt.tick_resume	= zevio_timer_set_oneshot;
> 
> Why is tick_resume added here ?

I am assuming you are lost because of reviewing too many similar
patches, but anyway below was part of the diff and so resume was
required :)

-       switch (mode) {
-       case CLOCK_EVT_MODE_RESUME:
-       case CLOCK_EVT_MODE_ONESHOT:
-               /* Enable timer interrupts */
-               writel(TIMER_INTR_MSK, timer->interrupt_regs + IO_INTR_MSK);
-               writel(TIMER_INTR_ALL, timer->interrupt_regs + IO_INTR_ACK);
-               break;

-- 
viresh
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