clocksource/drivers/sprd: Register one always-on timer to compensate suspend time
Since the clocksource framework has introduced one suspend clocksource to compensate the suspend time, this patch registers one always-on timer as the suspend clocksource. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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@ -156,4 +156,54 @@ static int __init sprd_timer_init(struct device_node *np)
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return 0;
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}
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static struct timer_of suspend_to = {
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.flags = TIMER_OF_BASE | TIMER_OF_CLOCK,
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};
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static u64 sprd_suspend_timer_read(struct clocksource *cs)
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{
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return ~(u64)readl_relaxed(timer_of_base(&suspend_to) +
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TIMER_VALUE_SHDW_LO) & cs->mask;
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}
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static int sprd_suspend_timer_enable(struct clocksource *cs)
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{
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sprd_timer_update_counter(timer_of_base(&suspend_to),
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TIMER_VALUE_LO_MASK);
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sprd_timer_enable(timer_of_base(&suspend_to), TIMER_CTL_PERIOD_MODE);
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return 0;
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}
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static void sprd_suspend_timer_disable(struct clocksource *cs)
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{
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sprd_timer_disable(timer_of_base(&suspend_to));
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}
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static struct clocksource suspend_clocksource = {
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.name = "sprd_suspend_timer",
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.rating = 200,
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.read = sprd_suspend_timer_read,
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.enable = sprd_suspend_timer_enable,
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.disable = sprd_suspend_timer_disable,
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.mask = CLOCKSOURCE_MASK(32),
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.flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP,
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};
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static int __init sprd_suspend_timer_init(struct device_node *np)
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{
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int ret;
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ret = timer_of_init(np, &suspend_to);
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if (ret)
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return ret;
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clocksource_register_hz(&suspend_clocksource,
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timer_of_rate(&suspend_to));
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return 0;
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}
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TIMER_OF_DECLARE(sc9860_timer, "sprd,sc9860-timer", sprd_timer_init);
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TIMER_OF_DECLARE(sc9860_persistent_timer, "sprd,sc9860-suspend-timer",
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sprd_suspend_timer_init);
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