[PATCH] m41t00: fix bitmasks when writing to chip

Fix the bitmasks used when writing to the M41T00 registers.

The original code used a mask of 0x7f when writing to each register,
this is incorrect and probably the result of a copy-paste error.  As a
result years from 1980 to 1999 will be read back as 2000 to 2019.

Signed-off-by: David Barksdale <amatus@ocgnet.org>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/i2c/chips/m41t00.c b/drivers/i2c/chips/m41t00.c
index 27fc9ff..99ab4ec 100644 (file)
--- a/drivers/i2c/chips/m41t00.c
+++ b/drivers/i2c/chips/m41t00.c
@@ -131,13 +131,13 @@ m41t00_set(void *arg)
        if ((i2c_smbus_write_byte_data(save_client, 0, tm.tm_sec & 0x7f) < 0)
                || (i2c_smbus_write_byte_data(save_client, 1, tm.tm_min & 0x7f)
                        < 0)
-               || (i2c_smbus_write_byte_data(save_client, 2, tm.tm_hour & 0x7f)
+               || (i2c_smbus_write_byte_data(save_client, 2, tm.tm_hour & 0x3f)
                        < 0)
-               || (i2c_smbus_write_byte_data(save_client, 4, tm.tm_mday & 0x7f)
+               || (i2c_smbus_write_byte_data(save_client, 4, tm.tm_mday & 0x3f)
                        < 0)
-               || (i2c_smbus_write_byte_data(save_client, 5, tm.tm_mon & 0x7f)
+               || (i2c_smbus_write_byte_data(save_client, 5, tm.tm_mon & 0x1f)
                        < 0)
-               || (i2c_smbus_write_byte_data(save_client, 6, tm.tm_year & 0x7f)
+               || (i2c_smbus_write_byte_data(save_client, 6, tm.tm_year & 0xff)
                        < 0))
 
                dev_warn(&save_client->dev,"m41t00: can't write to rtc chip\n");