Hi, On 2015년 12월 21일 02:15, Sergei Shtylyov wrote: > Hello. > > On 12/20/2015 05:31 PM, Chanwoo Choi wrote: > >> This patch depend on GPIOLIB configuration as following: >> I modified it with following diff and applied it. >> >> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig >> index ba4db7d..3d89e60 100644 >> --- a/drivers/extcon/Kconfig >> +++ b/drivers/extcon/Kconfig >> @@ -54,6 +54,7 @@ config EXTCON_MAX14577 >> >> config EXTCON_MAX3355 >> tristate "Maxim MAX3355 USB OTG EXTCON Support" >> + depends on GPIOLIB || COMPILE_TEST > > If it won't compile w/o gpiolib, what's the use of COMIPLE_TEST? > And no, it shouldn't depend on gpiolib. It has empty stubs for the case of CONFIG_GPIOLIB=n. Obviously something is wrong with the GPIO headers, I'll look into it. Yes. When GPIOLIB is disabled, the build issue don't happen. because include/linux/gpio/consumer.h implement the dummy function for all gpio functions if CONFIG_GPIOLIB is disabled. For correct operation of max3355, you should add the dependency to the extcon-max3355.c driver. This driver use the GPIO library certainly. COMPILE_TEST is used for just build test. You can see the detailed data[1]. [1] https://lkml.org/lkml/2013/5/22/155 Thanks, Chanwoo Choi -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html