On Wed, 30 Dec 2020 15:59:11 +0100, Arnd Bergmann wrote:

With CONFIG_I2C=m, the #ifdef section is disabled, as shown
by this warning:

drivers/rtc/rtc-rx6110.c:314:12: error: unused function 'rx6110_probe' [-Werror,-Wunused-function]

Change the driver to use IS_ENABLED() instead, which works
for both module and built-in subsystems.

Applied, thanks!

[1/1] rtc: rx6110: fix build against modular I2C
      commit: def8550f543e6c9101f3e1a03160b2aab8c02e8a

Best regards,
-- 
Alexandre Belloni [off-list ref]