tests: benchmarks: multicore: idle_with_pwm: Fix device runtime PM

API for PWM doesn't provide function for enabling/disabling
the device. As a result, device runtime PM doesn't know when
it shall wake up the device (get) / put device to low power
operation (put). Therefore, user must manually call
pm_device_runtime_get(&pwm_device);
pm_device_runtime_put(&pwm_device);

Fix PWM device runtime Power Management test.

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

tests/benchmarks/multicore/idle_with_pwm/src/main.c

@@ -66,13 +66,20 @@ int main(void)
 	LOG_INF("Multicore idle_with_pwm test on %s", CONFIG_BOARD_TARGET);
 	LOG_INF("Core will sleep for %d ms", CONFIG_TEST_SLEEP_DURATION_MS);
 
-	if (IS_ENABLED(CONFIG_PM_DEVICE_RUNTIME)) {
+#if defined(CONFIG_PM_DEVICE_RUNTIME)
 		pm_device_runtime_enable(pwm_led.dev);
-	}
+#endif
 
 	while (1) {
 		LOG_INF("Multicore idle_with_pwm test iteration %u", cnt++);
 
+#if defined(CONFIG_PM_DEVICE_RUNTIME)
+		/* API for PWM doesn't provide function for device enable/disable.
+		 * Thus PM for PWM has to be managed manually.
+		 */
+		pm_device_runtime_get(pwm_led.dev);
+#endif
+
 		/* Light up LED */
 		current_pulse_width = pulse_min;
 		for (int i = 0; i < PWM_STEPS_PER_SEC; i++) {
@@ -95,6 +102,13 @@ int main(void)
 			return ret;
 		}
 
+#if defined(CONFIG_PM_DEVICE_RUNTIME)
+		/* API for PWM doesn't provide function for device enable/disable.
+		 * Thus PM for PWM has to be managed manually.
+		 */
+		pm_device_runtime_put(pwm_led.dev);
+#endif
+
 		/* Sleep / enter low power state */
 		k_msleep(CONFIG_TEST_SLEEP_DURATION_MS);
 	}