From 15aa2876d9c7181c58305430f726461a2f24cb00 Mon Sep 17 00:00:00 2001 From: Philippe Mathieu-Daudé Date: Fri, 28 Aug 2020 10:02:44 +0100 Subject: hw/clock: Let clock_set() return boolean value MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Let clock_set() return a boolean value whether the clock has been updated or not. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-id: 20200806123858.30058-3-f4bug@amsat.org Signed-off-by: Peter Maydell --- hw/core/clock.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'hw/core/clock.c') 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) -- cgit 1.4.1