[PATCH V2] rtc: fix pcf8523 month definition

[PATCH V2] rtc: fix pcf8523 month definition

[Chris Cui]

This is the correct patch.

PCF8523 uses 1-12 to represent month according to datasheet. 
link: www.nxp.com/documents/data_sheet/PCF8523.pdf.

Signed-off-by: Chris Cui <chris.wei.cui@gmail.com>
---
 drivers/rtc/rtc-pcf8523.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 5c8f822..4cdb64b 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -206,7 +206,7 @@ static int pcf8523_rtc_read_time(struct device *dev, struct rtc_time *tm)
 	tm->tm_hour = bcd2bin(regs[2] & 0x3f);
 	tm->tm_mday = bcd2bin(regs[3] & 0x3f);
 	tm->tm_wday = regs[4] & 0x7;
-	tm->tm_mon = bcd2bin(regs[5] & 0x1f);
+	tm->tm_mon = bcd2bin(regs[5] & 0x1f) - 1;
 	tm->tm_year = bcd2bin(regs[6]) + 100;
 
 	return rtc_valid_tm(tm);
@@ -229,7 +229,7 @@ static int pcf8523_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	regs[3] = bin2bcd(tm->tm_hour);
 	regs[4] = bin2bcd(tm->tm_mday);
 	regs[5] = tm->tm_wday;
-	regs[6] = bin2bcd(tm->tm_mon);
+	regs[6] = bin2bcd(tm->tm_mon + 1);
 	regs[7] = bin2bcd(tm->tm_year - 100);
 
 	msg.addr = client->addr;
-- 
1.8.3.2