diff options
| author | Emil Bartczak <emilbart@gmail.com> | 2016-12-08 00:27:37 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-12-19 00:59:22 +0100 |
| commit | bcf18d88ac16c1a86bac7e8f5f4b1de1f752865f (patch) | |
| tree | 682300c7954114742262a5d310737f74a847a8b4 | |
| parent | 0b6a8f5c9bebe51b95ff23939db570e8d298a36f (diff) | |
rtc: mcp795: use bcd2bin/bin2bcd.
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 <emilbart@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
| -rw-r--r-- | drivers/rtc/rtc-mcp795.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c index 4021fd04cb0a..0389ee03c660 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, |