esp_lcd_backlight: do not build if not enabled

Signed-off-by: Rajssss <[email protected]>

Author: Rajssss

CMakeLists.txt

@@ -2,7 +2,7 @@ if(ESP_PLATFORM)
 
 file(GLOB SOURCES *.c)
 set(LVGL_INCLUDE_DIRS . lvgl_tft)
-list(APPEND SOURCES "lvgl_tft/disp_driver.c" "lvgl_tft/esp_lcd_backlight.c")
+list(APPEND SOURCES "lvgl_tft/disp_driver.c")
 
 #@todo add SimleInclude macro here
 
@@ -79,6 +79,11 @@ if(CONFIG_LV_TOUCH_CONTROLLER)
     endif()
 endif()
 
+# Add backlight control to compilation only if it is selected in menuconfig
+if(CONFIG_LV_ENABLE_BACKLIGHT_CONTROL)
+    list(APPEND SOURCES "lvgl_tft/esp_lcd_backlight.c")
+endif()
+
 idf_component_register(SRCS ${SOURCES}
                        INCLUDE_DIRS ${LVGL_INCLUDE_DIRS}
                        REQUIRES lvgl)

lvgl_tft/esp_lcd_backlight.h

@@ -19,8 +19,9 @@
 /*********************
  *      DEFINES
  *********************/
+#if CONFIG_LV_ENABLE_BACKLIGHT_CONTROL
 #define DISP_PIN_BCKL   CONFIG_LV_DISP_PIN_BCKL
-
+#endif
 
 /**********************
  * GLOBAL PROTOTYPES