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MIPS: generic: Set RTC_ALWAYS_BCD to 0

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Drivers for the mc146818 RTC generally check control registers to
determine whether a value is encoded as binary or as a binary coded
decimal. Setting RTC_ALWAYS_BCD to 1 effectively bypasses these checks
and causes drivers to always expect binary coded decimal values,
regardless of control register values.

This does not seem like a sane default - defaulting to 0 allows the
drivers to check control registers to determine encoding type & allows
the driver to work generically with both binary & BCD encodings. Set
this in mach-generic/mc146818rtc.h such that the generic kernel, or
platforms which don't provide a custom mc146818rtc.h, can have an RTC
driver which works with both encodings.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16185/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2017-06-02 12:29:55 -07:00 committed by Ralf Baechle
parent e889dfca12
commit ae7ce6b1e0
1 changed files with 1 additions and 1 deletions
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2
arch/mips/include/asm/mach-generic/mc146818rtc.h
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@ -27,7 +27,7 @@ static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
outb_p(data, RTC_PORT(1));
}
#define RTC_ALWAYS_BCD 1
#define RTC_ALWAYS_BCD 0
#ifndef mc146818_decode_year
#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1900)