IBM_EC_VOLUME
status = ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);
ACPI_EC_WRITE(sc->ec_dev, IBM_EC_VOLUME,
return ACPI_EC_WRITE(sc->ec_dev, IBM_EC_VOLUME, val_ec, 1);
status = ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);
return ACPI_EC_WRITE(sc->ec_dev, IBM_EC_VOLUME, val_ec, 1);
status = ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);
status = ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);
ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);
ACPI_EC_READ(sc->ec_dev, IBM_EC_VOLUME, &val_ec, 1);