clockevents/drivers/u300: Migrate to new 'set-state' interface
Migrate u300 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: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>hifive-unleashed-5.1
Viresh Kumar
Daniel Lezcano
parent
7486f5ad27
commit
8ff8fc13bd
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@ -187,85 +187,82 @@ struct u300_clockevent_data {
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unsigned ticks_per_jiffy;
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};
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static int u300_shutdown(struct clock_event_device *evt)
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{
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/* Disable interrupts on GP1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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return 0;
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}
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/*
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* The u300_set_mode() function is always called first, if we
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* have oneshot timer active, the oneshot scheduling function
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* If we have oneshot timer active, the oneshot scheduling function
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* u300_set_next_event() is called immediately after.
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*/
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static void u300_set_mode(enum clock_event_mode mode,
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struct clock_event_device *evt)
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static int u300_set_oneshot(struct clock_event_device *evt)
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{
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/* Just return; here? */
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/*
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* The actual event will be programmed by the next event hook,
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* so we just set a dummy value somewhere at the end of the
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* universe here.
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*/
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/* Disable interrupts on GPT1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 while we're reprogramming it. */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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/*
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* Expire far in the future, u300_set_next_event() will be
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* called soon...
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*/
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writel(0xFFFFFFFF, u300_timer_base + U300_TIMER_APP_GPT1TC);
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/* We run one shot per tick here! */
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writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
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u300_timer_base + U300_TIMER_APP_SGPT1M);
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/* Enable interrupts for this timer */
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writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Enable timer */
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writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
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u300_timer_base + U300_TIMER_APP_EGPT1);
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return 0;
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}
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static int u300_set_periodic(struct clock_event_device *evt)
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{
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struct u300_clockevent_data *cevdata =
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container_of(evt, struct u300_clockevent_data, cevd);
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switch (mode) {
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case CLOCK_EVT_MODE_PERIODIC:
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/* Disable interrupts on GPT1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 while we're reprogramming it. */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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/*
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* Set the periodic mode to a certain number of ticks per
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* jiffy.
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*/
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writel(cevdata->ticks_per_jiffy,
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u300_timer_base + U300_TIMER_APP_GPT1TC);
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/*
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* Set continuous mode, so the timer keeps triggering
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* interrupts.
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*/
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writel(U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS,
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u300_timer_base + U300_TIMER_APP_SGPT1M);
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/* Enable timer interrupts */
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writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Then enable the OS timer again */
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writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
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u300_timer_base + U300_TIMER_APP_EGPT1);
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break;
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case CLOCK_EVT_MODE_ONESHOT:
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/* Just break; here? */
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/*
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* The actual event will be programmed by the next event hook,
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* so we just set a dummy value somewhere at the end of the
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* universe here.
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*/
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/* Disable interrupts on GPT1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 while we're reprogramming it. */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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/*
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* Expire far in the future, u300_set_next_event() will be
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* called soon...
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*/
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writel(0xFFFFFFFF, u300_timer_base + U300_TIMER_APP_GPT1TC);
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/* We run one shot per tick here! */
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writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
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u300_timer_base + U300_TIMER_APP_SGPT1M);
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/* Enable interrupts for this timer */
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writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Enable timer */
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writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
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u300_timer_base + U300_TIMER_APP_EGPT1);
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break;
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case CLOCK_EVT_MODE_UNUSED:
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case CLOCK_EVT_MODE_SHUTDOWN:
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/* Disable interrupts on GP1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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break;
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case CLOCK_EVT_MODE_RESUME:
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/* Ignore this call */
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break;
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}
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/* Disable interrupts on GPT1 */
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writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Disable GP1 while we're reprogramming it. */
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writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
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u300_timer_base + U300_TIMER_APP_DGPT1);
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/*
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* Set the periodic mode to a certain number of ticks per
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* jiffy.
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*/
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writel(cevdata->ticks_per_jiffy,
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u300_timer_base + U300_TIMER_APP_GPT1TC);
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/*
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* Set continuous mode, so the timer keeps triggering
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* interrupts.
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*/
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writel(U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS,
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u300_timer_base + U300_TIMER_APP_SGPT1M);
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/* Enable timer interrupts */
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writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
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u300_timer_base + U300_TIMER_APP_GPT1IE);
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/* Then enable the OS timer again */
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writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
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u300_timer_base + U300_TIMER_APP_EGPT1);
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return 0;
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}
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/*
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@ -309,13 +306,15 @@ static int u300_set_next_event(unsigned long cycles,
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static struct u300_clockevent_data u300_clockevent_data = {
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/* Use general purpose timer 1 as clock event */
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.cevd = {
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.name = "GPT1",
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.name = "GPT1",
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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 = u300_set_next_event,
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.set_mode = u300_set_mode,
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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 = u300_set_next_event,
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.set_state_shutdown = u300_shutdown,
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.set_state_periodic = u300_set_periodic,
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.set_state_oneshot = u300_set_oneshot,
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},
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};
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