diff --git a/drivers/clocksource/timer-sprd.c b/drivers/clocksource/timer-sprd.c index ef9ebeafb3ed..430cb99d8d79 100644 --- a/drivers/clocksource/timer-sprd.c +++ b/drivers/clocksource/timer-sprd.c @@ -156,4 +156,54 @@ static int __init sprd_timer_init(struct device_node *np) return 0; } +static struct timer_of suspend_to = { + .flags = TIMER_OF_BASE | TIMER_OF_CLOCK, +}; + +static u64 sprd_suspend_timer_read(struct clocksource *cs) +{ + return ~(u64)readl_relaxed(timer_of_base(&suspend_to) + + TIMER_VALUE_SHDW_LO) & cs->mask; +} + +static int sprd_suspend_timer_enable(struct clocksource *cs) +{ + sprd_timer_update_counter(timer_of_base(&suspend_to), + TIMER_VALUE_LO_MASK); + sprd_timer_enable(timer_of_base(&suspend_to), TIMER_CTL_PERIOD_MODE); + + return 0; +} + +static void sprd_suspend_timer_disable(struct clocksource *cs) +{ + sprd_timer_disable(timer_of_base(&suspend_to)); +} + +static struct clocksource suspend_clocksource = { + .name = "sprd_suspend_timer", + .rating = 200, + .read = sprd_suspend_timer_read, + .enable = sprd_suspend_timer_enable, + .disable = sprd_suspend_timer_disable, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP, +}; + +static int __init sprd_suspend_timer_init(struct device_node *np) +{ + int ret; + + ret = timer_of_init(np, &suspend_to); + if (ret) + return ret; + + clocksource_register_hz(&suspend_clocksource, + timer_of_rate(&suspend_to)); + + return 0; +} + TIMER_OF_DECLARE(sc9860_timer, "sprd,sc9860-timer", sprd_timer_init); +TIMER_OF_DECLARE(sc9860_persistent_timer, "sprd,sc9860-suspend-timer", + sprd_suspend_timer_init);