diff options
| -rw-r--r-- | drivers/rtc/rtc-x1205.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c index b1de58e0b3d0..5638b7ba8b06 100644 --- a/drivers/rtc/rtc-x1205.c +++ b/drivers/rtc/rtc-x1205.c @@ -22,6 +22,7 @@ #include <linux/rtc.h> #include <linux/delay.h> #include <linux/module.h> +#include <linux/bitops.h> #define DRV_VERSION "1.0.8" @@ -366,8 +367,7 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim) * perform sign extension. The formula is * Catr = (atr * 0.25pF) + 11.00pF. */ - if (atr & 0x20) - atr |= 0xC0; + atr = sign_extend32(atr, 5); dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __func__, atr, atr); |