hw/clock: Let clock_set() return boolean value

Let clock_set() return a boolean value whether the clock
has been updated or not.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200806123858.30058-3-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 7 insertions, 5 deletions

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));
 }
 
 /**