Add Suspend functions (#3112)

* Add suspend functions

* Disable RGB code if it's disabled

* Add suspend code to ChibiOS for future compatibility

* Add keyboard_init functions

* Change where references so it will compile

* Wrong command chained in wake up kb function

* Fix non-feature file changes

* Add documentation

* Re-add matrix init docs

* add rgblight code to example

* Remove keyboard init stuff for separate PR

tmk_core/common/chibios/suspend.c

@@ -21,6 +21,21 @@ void suspend_idle(uint8_t time) {
 	wait_ms(time);
 }
 
+/** \brief Run keyboard level Power down
+ *
+ * FIXME: needs doc
+ */
+__attribute__ ((weak))
+void suspend_power_down_user (void) { }
+/** \brief Run keyboard level Power down
+ *
+ * FIXME: needs doc
+ */
+__attribute__ ((weak))
+void suspend_power_down_kb(void) {
+  suspend_power_down_user();
+}
+
 /** \brief suspend power down
  *
  * FIXME: needs doc
@@ -30,6 +45,7 @@ void suspend_power_down(void) {
 	// shouldn't power down TPM/FTM if we want a breathing LED
 	// also shouldn't power down USB
 
+  suspend_power_down_kb();
 	// on AVR, this enables the watchdog for 15ms (max), and goes to
 	// SLEEP_MODE_PWR_DOWN
 
@@ -53,6 +69,22 @@ bool suspend_wakeup_condition(void)
     return false;
 }
 
+/** \brief run user level code immediately after wakeup
+ *
+ * FIXME: needs doc
+ */
+__attribute__ ((weak))
+void suspend_wakeup_init_user(void) { }
+
+/** \brief run keyboard level code immediately after wakeup
+ *
+ * FIXME: needs doc
+ */
+__attribute__ ((weak))
+void suspend_wakeup_init_kb(void) {
+  suspend_power_down_user();
+}
+
 /** \brief suspend wakeup condition
  *
  * run immediately after wakeup
@@ -79,4 +111,5 @@ void suspend_wakeup_init(void)
 #ifdef BACKLIGHT_ENABLE
     backlight_init();
 #endif /* BACKLIGHT_ENABLE */
+  suspend_wakeup_init_kb();
 }