hollow_button: Add support for hollow button driver

hollow_led: Minor renaming.

device_hal/button_driver/CMakeLists.txt

@@ -1,12 +1,12 @@
 include($ENV{ESP_MATTER_DEVICE_PATH}/esp_matter_device.cmake)
 
-set(requires driver)
-if ("${button_type}" STREQUAL "gpio")
-    list(APPEND requires button)
-elseif ("${button_type}" STREQUAL "adc")
-    list(APPEND requires button)
+set(src_dirs )
+set(requires driver button)
+
+if ("${button_type}" STREQUAL "hollow_button")
+    list(APPEND src_dirs hollow_button)
 endif()
 
-idf_component_register(SRC_DIRS
+idf_component_register(SRC_DIRS ${src_dirs}
                     INCLUDE_DIRS
                     REQUIRES ${requires})

device_hal/button_driver/hollow_button/button_driver.c

@@ -0,0 +1,53 @@
+// Copyright 2021 Espressif Systems (Shanghai) CO LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License
+
+#include <esp_log.h>
+#include <iot_button.h>
+
+static const char *TAG = "button_driver_hollow";
+
+button_handle_t iot_button_create(const button_config_t *config)
+{
+    ESP_LOGI(TAG, "Button create");
+    return NULL;
+}
+
+esp_err_t iot_button_delete(button_handle_t btn_handle)
+{
+    ESP_LOGI(TAG, "Button delete");
+    return ESP_OK;
+}
+
+esp_err_t iot_button_register_cb(button_handle_t btn_handle, button_event_t event, button_cb_t cb)
+{
+    ESP_LOGI(TAG, "Button register callback");
+    return ESP_OK;
+}
+
+esp_err_t iot_button_unregister_cb(button_handle_t btn_handle, button_event_t event)
+{
+    ESP_LOGI(TAG, "Button unregister callback");
+    return ESP_OK;
+}
+
+button_event_t iot_button_get_event(button_handle_t btn_handle)
+{
+    ESP_LOGI(TAG, "Button get event");
+    return 0;
+}
+
+uint8_t iot_button_get_repeat(button_handle_t btn_handle)
+{
+    ESP_LOGI(TAG, "Button get repeat");
+    return 0;
+}

device_hal/device/esp32s2_devkit_c/esp_matter_device.cmake

@@ -4,7 +4,7 @@ if (NOT ("${IDF_TARGET}" STREQUAL "esp32s2" ))
 endif()
 
 SET(device_type     esp32s2_devkit_c)
-SET(led_type        hollow)
+SET(led_type        hollow_led)
 SET(button_type     gpio)
 
 SET(extra_components_dirs_append "$ENV{ESP_MATTER_DEVICE_PATH}/../../led_driver"