From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> drivers/rtc/rtc-m48t35.c: In function 'm48t35_read_time': drivers/rtc/rtc-m48t35.c:59: error: implicit declaration of function 'readb' drivers/rtc/rtc-m48t35.c:60: error: implicit declaration of function 'writeb' drivers/rtc/rtc-m48t35.c: In function 'm48t35_probe': drivers/rtc/rtc-m48t35.c:168: error: implicit declaration of function 'ioremap' drivers/rtc/rtc-m48t35.c:168: warning: assignment makes pointer from integer without a cast drivers/rtc/rtc-m48t35.c:188: error: implicit declaration of function 'iounmap' Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> Cc: Alessandro Zummo <alessandro.zummo@xxxxxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/rtc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff -puN drivers/rtc/Kconfig~drivers-rtc-rtc-m48t35c-is-borked-too drivers/rtc/Kconfig --- a/drivers/rtc/Kconfig~drivers-rtc-rtc-m48t35c-is-borked-too +++ a/drivers/rtc/Kconfig @@ -432,6 +432,7 @@ config RTC_DRV_M48T86 config RTC_DRV_M48T35 tristate "ST M48T35" + depends on MIPS help If you say Y here you will get support for the ST M48T35 RTC chip. _