tests: kernel: timer: Fix failing tests

This commit provides an additional threshold value for comparison when a custom k_busy_wait() implementation is chosen. Signed-off-by: Adam Kondraciuk <[email protected]>
zephyrproject-rtos · May 21, 2024 · 80f1268 · 80f1268
1 parent 8716b6a
commit 80f1268
Showing 1 changed file with 13 additions and 2 deletions.
diff --git a/tests/kernel/timer/timer_api/src/main.c b/tests/kernel/timer/timer_api/src/main.c
@@ -28,15 +28,26 @@ struct timer_data {
  */
 #define INEXACT_MS_CONVERT ((CONFIG_SYS_CLOCK_TICKS_PER_SEC % MSEC_PER_SEC) != 0)
 
+#if CONFIG_ARCH_HAS_CUSTOM_BUSY_WAIT
+/* In case of custom k_busy_wait() implementation there might be a comparison between
+ * time sources based on different clocks. Thus the maximum slew error shall be taken
+ *  into account.
+ */
 #if CONFIG_NRF_RTC_TIMER
 /* On Nordic SOCs one or both of the tick and busy-wait clocks may
  * derive from sources that have slews that sum to +/- 13%.
  */
 #define BUSY_TICK_SLEW_PPM 130000U
 #else
-/* On other platforms assume the clocks are perfectly aligned. */
-#define BUSY_TICK_SLEW_PPM 0U
+/* On other platforms the maximum skew allowed is +/- 2%. */
+#define BUSY_TICK_SLEW_PPM 20000U
 #endif
+#else
+/* On other platforms, for default k_busy_wait() implementation,
+ *  assume the clocks are perfectly aligned.
+ */
+#define BUSY_TICK_SLEW_PPM 0U
+#endif /* CONFIG_ARCH_HAS_CUSTOM_BUSY_WAIT */
 #define PPM_DIVISOR 1000000U
 
 /* If the tick clock is faster or slower than the busywait clock the