Commit a1614796 authored by Jamie Lenehan's avatar Jamie Lenehan Committed by Paul Mundt
Browse files

rtc: rtc-sh: fix rtc for out-by-one for the month. 



The RMONCNT register, which holds the month in the RTC, takes a value
between 1 and 12 while the tm_mon field in the time structures takes
a value between 0 and 11. This wasn't being taken into account in
rtc-sh resulting in the month being out by one.

eg, on my board during boot the RTC is set to:

  RTC is set to Thu Jul 01 09:00:00 1999

but "hwclock -r" immediately after logging in was showing:

  Sun Aug  1 09:01:43 1999  0.000000 seconds

Signed-off-by: default avatarJamie Lenehan <lenehan@twibble.org>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 55eec11a

drivers/rtc/rtc-sh.c

+3 −3
Original line number Diff line number Diff line
@@ -268,7 +268,7 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) 
		tm->tm_hour	= BCD2BIN(readb(rtc->regbase + RHRCNT));

		tm->tm_wday	= BCD2BIN(readb(rtc->regbase + RWKCNT));

		tm->tm_mday	= BCD2BIN(readb(rtc->regbase + RDAYCNT));

		tm->tm_mon	= BCD2BIN(readb(rtc->regbase + RMONCNT));

		tm->tm_mon	= BCD2BIN(readb(rtc->regbase + RMONCNT)) - 1;



#if defined(CONFIG_CPU_SH4)

		yr  = readw(rtc->regbase + RYRCNT);
@@ -296,7 +296,7 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) 
		"mday=%d, mon=%d, year=%d, wday=%d\n",

		__FUNCTION__,

		tm->tm_sec, tm->tm_min, tm->tm_hour,

		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);

		tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);



	if (rtc_valid_tm(tm) < 0)

		dev_err(dev, "invalid date\n");
@@ -323,7 +323,7 @@ static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) 
	writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT);

	writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT);

	writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT);

	writeb(BIN2BCD(tm->tm_mon),  rtc->regbase + RMONCNT);

	writeb(BIN2BCD(tm->tm_mon + 1), rtc->regbase + RMONCNT);



#ifdef CONFIG_CPU_SH3

	year = tm->tm_year % 100;

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