config LED bool "Enable LED support" depends on DM help Many boards have LEDs which can be used to signal status or alerts. U-Boot provides a uclass API to implement this feature. LED drivers can provide access to board-specific LEDs. Use of the device tree for configuration is encouraged. config SPL_LED_SUPPORT bool "Enable LED support in SPL" depends on LED help The LED subsystem adds a small amount of overhead to the image. If this is acceptable and you have a need to use LEDs in SPL, enable this option. You will need to enable device tree in SPL for this to work. config LED_GPIO bool "LED support for GPIO-connected LEDs" depends on LED && DM_GPIO help Enable support for LEDs which are connected to GPIO lines. These GPIOs may be on the SoC or some other device which provides GPIOs. The GPIO driver must used driver model. LEDs are configured using the device tree.