hw/misc/led: Emit a trace event when LED intensity has changed

Track the LED intensity, and emit a trace event when it changes.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200912134041.946260-4-f4bug@amsat.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/misc/led.c b/hw/misc/led.c
index c5fa09a613..5266d026d0 100644
--- a/hw/misc/led.c
+++ b/hw/misc/led.c
@@ -41,6 +41,10 @@ void led_set_intensity(LEDState *s, unsigned intensity_percent)
         intensity_percent = LED_INTENSITY_PERCENT_MAX;
     }
     trace_led_set_intensity(s->description, s->color, intensity_percent);
+    if (intensity_percent != s->intensity_percent) {
+        trace_led_change_intensity(s->description, s->color,
+                                   s->intensity_percent, intensity_percent);
+    }
     s->intensity_percent = intensity_percent;
 }