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RTC: Fix month offset by one problem in M41T62 RTC driver

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This patch fixes a problem with the month being read and written
incorrectly (offset by one). This only gets visible by also using
the Linux driver (rtc-m41t80).

Tested on AMCC Canyonlands.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2008-04-30 15:50:39 +02:00 • committed by Wolfgang Denk
parent 50f93d30da
commit 0072b78be2
1 changed files with 2 additions and 2 deletions
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4
drivers/rtc/m41t62.c
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@ -81,7 +81,7 @@ int rtc_get(struct rtc_time *tm)
tm->tm_hour = BCD2BIN(buf[M41T62_REG_HOUR] & 0x3f); tm->tm_hour = BCD2BIN(buf[M41T62_REG_HOUR] & 0x3f);
tm->tm_mday = BCD2BIN(buf[M41T62_REG_DAY] & 0x3f); tm->tm_mday = BCD2BIN(buf[M41T62_REG_DAY] & 0x3f);
tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07; tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07;
tm->tm_mon = BCD2BIN(buf[M41T62_REG_MON] & 0x1f) - 1; tm->tm_mon = BCD2BIN(buf[M41T62_REG_MON] & 0x1f);
/* assume 20YY not 19YY, and ignore the Century Bit */ /* assume 20YY not 19YY, and ignore the Century Bit */
/* U-Boot needs to add 1900 here */ /* U-Boot needs to add 1900 here */
@ -119,7 +119,7 @@ void rtc_set(struct rtc_time *tm)
buf[M41T62_REG_DAY] = buf[M41T62_REG_DAY] =
BIN2BCD(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f); BIN2BCD(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
buf[M41T62_REG_MON] = buf[M41T62_REG_MON] =
BIN2BCD(tm->tm_mon + 1) | (buf[M41T62_REG_MON] & ~0x1f); BIN2BCD(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
/* assume 20YY not 19YY */ /* assume 20YY not 19YY */
buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100); buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100);