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[v2,3/6] rtc: mcp795: fix time range difference between linux and RTC chip.

Message ID 20cd15adcd8ffcf603987f6d928f6b7762eb1e58.1481151278.git.emilbart@gmail.com
State Accepted
Headers show

Commit Message

Emil Bartczak Dec. 7, 2016, 11:27 p.m. UTC 
In linux rtc_time struct, tm_mon range is 0~11, while in RTC HW REG,
month range is 1~12. This patch adjusts difference of them.

Signed-off-by: Emil Bartczak <emilbart@gmail.com>
---
 drivers/rtc/rtc-mcp795.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c
index 5fbdb4c..4618f4f 100644
--- a/drivers/rtc/rtc-mcp795.c
+++ b/drivers/rtc/rtc-mcp795.c
@@ -110,7 +110,7 @@  static int mcp795_set_time(struct device *dev, struct rtc_time *tim)
 	data[1] = (data[1] & 0x80) | bin2bcd(tim->tm_min);
 	data[2] = bin2bcd(tim->tm_hour);
 	data[4] = bin2bcd(tim->tm_mday);
-	data[5] = (data[5] & MCP795_LP_BIT) | bin2bcd(tim->tm_mon);
+	data[5] = (data[5] & MCP795_LP_BIT) | bin2bcd(tim->tm_mon + 1);
 
 	if (tim->tm_year > 100)
 		tim->tm_year -= 100;
@@ -143,7 +143,7 @@  static int mcp795_read_time(struct device *dev, struct rtc_time *tim)
 	tim->tm_min	= bcd2bin(data[1] & 0x7F);
 	tim->tm_hour	= bcd2bin(data[2] & 0x3F);
 	tim->tm_mday	= bcd2bin(data[4] & 0x3F);
-	tim->tm_mon	= bcd2bin(data[5] & 0x1F);
+	tim->tm_mon	= bcd2bin(data[5] & 0x1F) - 1;
 	tim->tm_year	= bcd2bin(data[6]) + 100; /* Assume we are in 20xx */
 
 	dev_dbg(dev, "Read from mcp795: %04d-%02d-%02d %02d:%02d:%02d\n",