Change rtc-mcp795.c to use the bcd2bin/bin2bcd functions.
This change fixes the wrong conversion of month value
from binary to BCD (missing right shift operation for 10 month).
Signed-off-by: Emil Bartczak <emilb...@gmail.com>
---
drivers/rtc/rtc-mcp795.c | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c
index 4021fd0..0389ee0 100644
--- a/drivers/rtc/rtc-mcp795.c
+++ b/drivers/rtc/rtc-mcp795.c
@@ -21,6 +21,7 @@
#include <linux/spi/spi.h>
#include <linux/rtc.h>
#include <linux/of.h>
+#include <linux/bcd.h>
/* MCP795 Instructions, see datasheet table 3-1 */
#define MCP795_EEREAD 0x03
@@ -104,16 +105,16 @@ static int mcp795_set_time(struct device *dev, struct
rtc_time *tim)
if (ret)
return ret;
- data[0] = (data[0] & 0x80) | ((tim->tm_sec / 10) << 4) | (tim->tm_sec %
10);
- data[1] = (data[1] & 0x80) | ((tim->tm_min / 10) << 4) | (tim->tm_min %
10);
- data[2] = ((tim->tm_hour / 10) << 4) | (tim->tm_hour % 10);
- data[4] = ((tim->tm_mday / 10) << 4) | ((tim->tm_mday) % 10);
- data[5] = (data[5] & 0x10) | (tim->tm_mon / 10) | (tim->tm_mon % 10);
+ data[0] = (data[0] & 0x80) | bin2bcd(tim->tm_sec);
+ 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] & 0x10) | bin2bcd(tim->tm_mon);
if (tim->tm_year > 100)
tim->tm_year -= 100;
- data[6] = ((tim->tm_year / 10) << 4) | (tim->tm_year % 10);
+ data[6] = bin2bcd(tim->tm_year);
ret = mcp795_rtcc_write(dev, 0x01, data, sizeof(data));
@@ -137,12 +138,12 @@ static int mcp795_read_time(struct device *dev, struct
rtc_time *tim)
if (ret)
return ret;
- tim->tm_sec = ((data[0] & 0x70) >> 4) * 10 + (data[0] &
0x0f);
- tim->tm_min = ((data[1] & 0x70) >> 4) * 10 + (data[1] &
0x0f);
- tim->tm_hour = ((data[2] & 0x30) >> 4) * 10 + (data[2] & 0x0f);
- tim->tm_mday = ((data[4] & 0x30) >> 4) * 10 + (data[4] & 0x0f);
- tim->tm_mon = ((data[5] & 0x10) >> 4) * 10 + (data[5] &
0x0f);
- tim->tm_year = ((data[6] & 0xf0) >> 4) * 10 + (data[6] & 0x0f) +
100; /* Assume we are in 20xx */
+ tim->tm_sec = bcd2bin(data[0] & 0x7F);
+ 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_year = bcd2bin(data[6]) + 100; /* Assume we are in 20xx */
dev_dbg(dev, "Read from mcp795: %04d-%02d-%02d %02d:%02d:%02d\n",
tim->tm_year + 1900, tim->tm_mon, tim->tm_mday,
--
2.7.4
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