From c41679a4481d5bf9908d99644d47b2e8ff6f028f Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Mon, 31 Dec 2012 00:05:46 +0000 Subject: ACPICA: Add time macros for various timer/time manipulation. Constants for time manipulation, including constants for the 100 nanosecond timers. Chao Guan, Bob Moore, Lv Zheng. Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpica/hwtimer.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/acpi/acpica/hwtimer.c') diff --git a/drivers/acpi/acpica/hwtimer.c b/drivers/acpi/acpica/hwtimer.c index bfdce22f3798..4e741d85e6b4 100644 --- a/drivers/acpi/acpica/hwtimer.c +++ b/drivers/acpi/acpica/hwtimer.c @@ -176,10 +176,11 @@ acpi_get_timer_duration(u32 start_ticks, u32 end_ticks, u32 * time_elapsed) /* * Compute Duration (Requires a 64-bit multiply and divide): * - * time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY; + * time_elapsed (microseconds) = + * (delta_ticks * ACPI_USEC_PER_SEC) / ACPI_PM_TIMER_FREQUENCY; */ - status = acpi_ut_short_divide(((u64) delta_ticks) * 1000000, - PM_TIMER_FREQUENCY, "ient, NULL); + status = acpi_ut_short_divide(((u64)delta_ticks) * ACPI_USEC_PER_SEC, + ACPI_PM_TIMER_FREQUENCY, "ient, NULL); *time_elapsed = (u32) quotient; return_ACPI_STATUS(status); -- cgit v1.2.3