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char/rtc: replace blacklist with whitelist

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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>
This commit is contained in:
Arnd Bergmann 2016-04-27 21:45:01 +02:00 committed by Greg Kroah-Hartman
parent b9c11a2333
commit 2fad622483
1 changed files with 1 additions and 2 deletions
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3
drivers/char/Kconfig
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@ -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