PMBUS_WRITE_PROTECT
PMBUS_WRITE_PROTECT, 0);
PMBUS_WRITE_PROTECT, PB_WP_VOUT);
PMBUS_WRITE_PROTECT, PB_WP_OP);
PMBUS_WRITE_PROTECT, PB_WP_ALL);
ret = _pmbus_read_byte_data(client, -1, PMBUS_WRITE_PROTECT);
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
case PMBUS_WRITE_PROTECT:
case PMBUS_WRITE_PROTECT: