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#define DS1682_EEPROM_SIZE 10/* * Generic counter attributes */static ssize_t ds1682_show(struct device *dev, struct device_attribute *attr, char *buf){ struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); struct i2c_client *client = to_i2c_client(dev); unsigned long long val; unsigned long long val, check; __le32 val_le = 0; int rc; dev_dbg(dev, "ds1682_show() called on %s\n", attr->attr.name); /* Read the register */ rc = i2c_smbus_read_i2c_block_data(client, sattr->index, sattr->nr, (u8 *)&val_le); if (rc < 0) return -EIO; val = le32_to_cpu(val_le); if (sattr->index == DS1682_REG_ELAPSED) { int retries = 5; /* Detect and retry when a tick occurs mid-read */ do { rc = i2c_smbus_read_i2c_block_data(client, sattr->index, sattr->nr, (u8 *)&val_le); if (rc < 0 || retries <= 0) return -EIO; check = val; val = le32_to_cpu(val_le); retries--; } while (val != check && val != (check + 1)); } /* Format the output string and return # of bytes * Special case: the 32 bit regs are time values with 1/4s * resolution, scale them up to milliseconds */ return sprintf(buf, "%llu\n", (sattr->nr == 4) ? (val * 250) : val);}static ssize_t ds1682_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count){