Merge pull request #10074 from morser499/cy-mbed-os-5.12.0-pwm-free

Fixed issue with PWM not being freed when the object is destroyed

Author: Cruz Monrreal

drivers/PwmOut.h

@@ -68,6 +68,7 @@ class PwmOut {
     ~PwmOut()
     {
         core_util_critical_section_enter();
+        pwmout_free(&_pwm);
         unlock_deep_sleep();
         core_util_critical_section_exit();
     }

targets/TARGET_Cypress/TARGET_PSOC6/pwmout_api.c

@@ -235,9 +235,13 @@ void pwmout_init(pwmout_t *obj, PinName pin)
 
 void pwmout_free(pwmout_t *obj)
 {
-    /* Does nothing because it is not called in the MBED PWMOUT driver
-    * destructor. The pwmout_init handles multiple calls of constructor.
-    */
+#if DEVICE_SLEEP && DEVICE_LPTICKER
+    if (!Cy_SysPm_UnregisterCallback(&obj->pm_callback_handler)) {
+        error("PM callback unregistration failed!");
+    }
+#endif
+    Cy_TCPWM_PWM_Disable(obj->base, obj->counter_id);
+    Cy_TCPWM_PWM_DeInit(obj->base, obj->counter_id, &pwm_config);
 }
 
 void pwmout_write(pwmout_t *obj, float percent)