char/rtc: replace blacklist with whitelist

Every new architecture has to add itself to the growing list of those
that do not support the legacy PC RTC driver.

This replaces the long list of architectures that don't support it
with a shorter list of those that do.

The list is taken from those architectures that have a non-empty
asm/mc146818rtc.h header file and were not explicitly blacklisted
or select RTC_LIB.

Alpha and Loongson64 can already choose between this driver and
an rtc-class based one. mn10300 is actually the only architecture
now that still requires this driver, and that should be fairly
easy to change to use rtc-cmos if we want to kill off rtc.ko
for good.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 3ec0766ed5e97a80390f3e8dcbe009c4414c9cf2..ca397384dc152881f86243af1aeca1cacac2640e 100644 (file)
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -279,8 +279,7 @@ if RTC_LIB=n
 
 config RTC
        tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
-       depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV \
-                       && !ARM && !SUPERH && !S390 && !AVR32 && !BLACKFIN && !UML
+       depends on ALPHA || (MIPS && MACH_LOONGSON64) || MN10300
        ---help---
          If you say Y here and create a character special file /dev/rtc with
          major number 10 and minor number 135 using mknod ("man mknod"), you