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ARM/gemini/time: Migrate to new 'set-state' interface
Migrate gemini 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. Acked-by: Hans Ulli Kroll <ulli.kroll@googlemail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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@ -59,49 +59,48 @@ static int gemini_timer_set_next_event(unsigned long cycles,
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return 0;
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}
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static void gemini_timer_set_mode(enum clock_event_mode mode,
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struct clock_event_device *evt)
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static int gemini_timer_shutdown(struct clock_event_device *evt)
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{
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u32 cr;
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/*
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* Disable also for oneshot: the set_next() call will arm the timer
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* instead.
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*/
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cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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cr &= ~TIMER_2_CR_ENABLE;
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cr &= ~TIMER_2_CR_INT;
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writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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return 0;
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}
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static int gemini_timer_set_periodic(struct clock_event_device *evt)
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{
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u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ);
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u32 cr;
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switch (mode) {
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case CLOCK_EVT_MODE_PERIODIC:
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/* Start the timer */
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writel(period,
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TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
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writel(period,
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TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
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cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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cr |= TIMER_2_CR_ENABLE;
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cr |= TIMER_2_CR_INT;
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writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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break;
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case CLOCK_EVT_MODE_ONESHOT:
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case CLOCK_EVT_MODE_UNUSED:
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case CLOCK_EVT_MODE_SHUTDOWN:
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case CLOCK_EVT_MODE_RESUME:
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/*
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* Disable also for oneshot: the set_next() call will
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* arm the timer instead.
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*/
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cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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cr &= ~TIMER_2_CR_ENABLE;
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cr &= ~TIMER_2_CR_INT;
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writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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break;
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default:
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break;
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}
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/* Start the timer */
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writel(period, TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
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writel(period, TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
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cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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cr |= TIMER_2_CR_ENABLE;
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cr |= TIMER_2_CR_INT;
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writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
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return 0;
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}
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/* Use TIMER2 as clock event */
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static struct clock_event_device gemini_clockevent = {
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.name = "TIMER2",
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.rating = 300, /* Reasonably fast and accurate clock event */
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.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
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.set_next_event = gemini_timer_set_next_event,
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.set_mode = gemini_timer_set_mode,
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.name = "TIMER2",
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/* Reasonably fast and accurate clock event */
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.rating = 300,
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.features = CLOCK_EVT_FEAT_PERIODIC |
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CLOCK_EVT_FEAT_ONESHOT,
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.set_next_event = gemini_timer_set_next_event,
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.set_state_shutdown = gemini_timer_shutdown,
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.set_state_periodic = gemini_timer_set_periodic,
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.set_state_oneshot = gemini_timer_shutdown,
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.tick_resume = gemini_timer_shutdown,
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};
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/*
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