From bc8d12bfd8750de265b742f2ab9cdde2726ea85f Mon Sep 17 00:00:00 2001 From: Pragnesh Patel Date: Sun, 17 Jan 2021 18:11:25 +0530 Subject: riscv: timer: Add support for an early timer Added support for timer_early_get_count() and timer_early_get_rate() This is mostly useful in tracing. Signed-off-by: Pragnesh Patel Reviewed-by: Rick Chen --- drivers/timer/sifive_clint_timer.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'drivers/timer/sifive_clint_timer.c') diff --git a/drivers/timer/sifive_clint_timer.c b/drivers/timer/sifive_clint_timer.c index de23b85404..de7b4b95c9 100644 --- a/drivers/timer/sifive_clint_timer.c +++ b/drivers/timer/sifive_clint_timer.c @@ -15,11 +15,30 @@ /* mtime register */ #define MTIME_REG(base) ((ulong)(base) + 0xbff8) -static u64 sifive_clint_get_count(struct udevice *dev) +static u64 notrace sifive_clint_get_count(struct udevice *dev) { return readq((void __iomem *)MTIME_REG(dev_get_priv(dev))); } +#if CONFIG_IS_ENABLED(RISCV_MMODE) && IS_ENABLED(CONFIG_TIMER_EARLY) +/** + * timer_early_get_rate() - Get the timer rate before driver model + */ +unsigned long notrace timer_early_get_rate(void) +{ + return RISCV_MMODE_TIMER_FREQ; +} + +/** + * timer_early_get_count() - Get the timer count before driver model + * + */ +u64 notrace timer_early_get_count(void) +{ + return readq((void __iomem *)MTIME_REG(RISCV_MMODE_TIMERBASE)); +} +#endif + static const struct timer_ops sifive_clint_ops = { .get_count = sifive_clint_get_count, }; -- cgit v1.2.3