diff options
| author | Marek Vasut <marek.vasut@gmail.com> | 2019-10-15 22:43:41 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-10-31 07:22:53 -0400 |
| commit | 80e7e7c2aba5793a1e39592cd53de9e5aca96f0b (patch) | |
| tree | 1ce3f652b3e6a65c7ad2a76e8bec940261b202ec /lib | |
| parent | 52e1d93c14d0a56651367eb00f8d6b6fe80a2708 (diff) | |
| download | u-boot-80e7e7c2aba5793a1e39592cd53de9e5aca96f0b.tar.gz | |
lib: time: Add microsecond timer
Add get_timer_us(), which is useful e.g. when we need higher
precision timestamps.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
[trini: Fixup arch/arm/mach-bcm283x/include/mach/timer.h]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/time.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/time.c b/lib/time.c index f5751ab162..f30fc05804 100644 --- a/lib/time.c +++ b/lib/time.c @@ -134,6 +134,20 @@ ulong __weak get_timer(ulong base) return tick_to_time(get_ticks()) - base; } +static uint64_t notrace tick_to_time_us(uint64_t tick) +{ + ulong div = get_tbclk() / 1000; + + tick *= CONFIG_SYS_HZ; + do_div(tick, div); + return tick; +} + +uint64_t __weak get_timer_us(uint64_t base) +{ + return tick_to_time_us(get_ticks()) - base; +} + unsigned long __weak notrace timer_get_us(void) { return tick_to_time(get_ticks() * 1000); |