# define M41TXX_BIT_CALIB_SIGN BIT(5)
# define M41TXX_M_CALIBRATION GENMASK(4, 0)
+#define DS1388_REG_FLAG 0x0b
+# define DS1388_BIT_OSF BIT(7)
/* negative offset step is -2.034ppm */
#define M41TXX_NEG_OFFSET_STEP_PPB 2034
/* positive offset step is +4.068ppm */
if (tmp & DS1340_BIT_OSF)
return -EINVAL;
break;
+ case ds_1388:
+ ret = regmap_read(ds1307->regmap, DS1388_REG_FLAG, &tmp);
+ if (ret)
+ return ret;
+ if (tmp & DS1388_BIT_OSF)
+ return -EINVAL;
+ break;
case mcp794xx:
if (!(tmp & MCP794XX_BIT_ST))
return -EINVAL;