The driver will compile with warning without OF because armada38x_data and armada8k_data will be defined but not used. It would be possible to move then in the #ifdef CONFIG_OF section but then their members will be defined but not used. Instead of moving most of the driver in the #ifdef, simply depend on OF. Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> --- drivers/rtc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index e1576754a50f..68ae202e0716 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1594,6 +1594,7 @@ config RTC_DRV_MV config RTC_DRV_ARMADA38X tristate "Armada 38x Marvell SoC RTC" depends on ARCH_MVEBU || COMPILE_TEST + depends on OF help If you say yes here you will get support for the in-chip RTC that can be found in the Armada 38x Marvell's SoC device -- 2.29.2