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 --- include/time.h | 1 + lib/time.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+)
diff --git a/include/time.h b/include/time.h index 1e9b369be7..a1149522ed 100644 --- a/include/time.h +++ b/include/time.h @@ -13,6 +13,7 @@ unsigned long get_timer(unsigned long base); * Granularity may be larger than 1us if hardware does not support this. */ unsigned long timer_get_us(void); +uint64_t get_timer_us(uint64_t base);
/* * timer_test_add_offset() 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);