diff mbox series

[v4,3/8] hw/misc/led: Emit a trace event when LED intensity has changed

Message ID 20200907163257.46527-4-f4bug@amsat.org
State New
Headers show
Series hw/misc: Add LED device | expand

Commit Message

Philippe Mathieu-Daudé Sept. 7, 2020, 4:32 p.m. UTC 
Track the LED intensity, and emit a trace event when it changes.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/misc/led.c        | 4 ++++
 hw/misc/trace-events | 1 +
 2 files changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/hw/misc/led.c b/hw/misc/led.c
index 1acade1d592..b7e9b1465bb 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;
 }
 
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 76c9ddb54fe..89d15f05f9a 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -216,6 +216,7 @@  grlib_apb_pnp_read(uint64_t addr, uint32_t value) "APB PnP read addr:0x%03"PRIx6
 
 # led.c
 led_set_intensity(const char *color, const char *desc, uint8_t intensity_percent) "LED desc:'%s' color:%s intensity: %u%%"
+led_change_intensity(const char *color, const char *desc, uint8_t old_intensity_percent, uint8_t new_intensity_percent) "LED desc:'%s' color:%s intensity %u%% -> %u%%"
 
 # pca9552.c
 pca955x_gpio_status(const char *description, const char *buf) "%s GPIOs 0-15 [%s]"