feat(perimgr): add function to retrieve detaching CB

Author: SuGlider

cores/esp32/esp32-hal-periman.c

@@ -16,7 +16,7 @@ typedef struct ATTR_PACKED {
   int8_t bus_channel;
 } peripheral_pin_item_t;
 
-static peripheral_bus_deinit_cb_t deinit_functions[ESP32_BUS_TYPE_MAX];
+static peripheral_bus_deinit_cb_t deinit_functions[ESP32_BUS_TYPE_MAX] = { NULL };
 static peripheral_pin_item_t pins[SOC_GPIO_PIN_COUNT];
 
 #define GPIO_NOT_VALID(p) ((p >= SOC_GPIO_PIN_COUNT) || ((SOC_GPIO_VALID_GPIO_MASK & (1ULL << p)) == 0))
@@ -236,6 +236,14 @@ bool perimanSetBusDeinit(peripheral_bus_type_t type, peripheral_bus_deinit_cb_t
   return true;
 }
 
+peripheral_bus_deinit_cb_t perimanSetBusDeinit(peripheral_bus_type_t type) {
+  if (type >= ESP32_BUS_TYPE_MAX || type == ESP32_BUS_TYPE_INIT) {
+    log_e("Invalid type: %s (%u)", perimanGetTypeName(type), (unsigned int)type);
+    return NULL;
+  }
+  return deinit_functions[type];
+}
+
 bool perimanPinIsValid(uint8_t pin) {
   return !(GPIO_NOT_VALID(pin));
 }