[PATCH] rtc driver rtc-pcf8563 century bit inversed

The century bit PCF8563_MO_C in the month register is misinterpreted.  It
is set to 1 for the 20th century and 0 for 21th, and the driver is
expecting the opposite behavior.

Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index ba9a583..bd43106 100644 (file)
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -95,7 +95,7 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
        tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
        tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
        tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
-               + (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 100 : 0);
+               + (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 0 : 100);
 
        dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
                "mday=%d, mon=%d, year=%d, wday=%d\n",
@@ -135,7 +135,7 @@ static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
 
        /* year and century */
        buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100);
-       if (tm->tm_year / 100)
+       if (tm->tm_year < 100)
                buf[PCF8563_REG_MO] |= PCF8563_MO_C;
 
        buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;