diff options
| -rw-r--r-- | hw/core/clock.c | 7 | ||||
| -rw-r--r-- | include/hw/clock.h | 12 |
2 files changed, 13 insertions, 6 deletions
diff --git a/hw/core/clock.c b/hw/core/clock.c index 3c0daf7d4c..7066282f7b 100644 --- a/hw/core/clock.c +++ b/hw/core/clock.c @@ -34,11 +34,16 @@ void clock_clear_callback(Clock *clk) clock_set_callback(clk, NULL, NULL); } -void clock_set(Clock *clk, uint64_t period) +bool clock_set(Clock *clk, uint64_t period) { + if (clk->period == period) { + return false; + } trace_clock_set(CLOCK_PATH(clk), CLOCK_PERIOD_TO_NS(clk->period), CLOCK_PERIOD_TO_NS(period)); clk->period = period; + + return true; } static void clock_propagate_period(Clock *clk, bool call_callbacks) diff --git a/include/hw/clock.h b/include/hw/clock.h index 468fed0996..d85af45c96 100644 --- a/include/hw/clock.h +++ b/include/hw/clock.h @@ -127,17 +127,19 @@ void clock_set_source(Clock *clk, Clock *src); * @value: the clock's value, 0 means unclocked * * Set the local cached period value of @clk to @value. + * + * @return: true if the clock is changed. */ -void clock_set(Clock *clk, uint64_t value); +bool clock_set(Clock *clk, uint64_t value); -static inline void clock_set_hz(Clock *clk, unsigned hz) +static inline bool clock_set_hz(Clock *clk, unsigned hz) { - clock_set(clk, CLOCK_PERIOD_FROM_HZ(hz)); + return clock_set(clk, CLOCK_PERIOD_FROM_HZ(hz)); } -static inline void clock_set_ns(Clock *clk, unsigned ns) +static inline bool clock_set_ns(Clock *clk, unsigned ns) { - clock_set(clk, CLOCK_PERIOD_FROM_NS(ns)); + return clock_set(clk, CLOCK_PERIOD_FROM_NS(ns)); } /** |