acpi_dsd_string
ret = acpi_dsd_string(ad->ad_handle, "compatible",
ret = acpi_dsd_string(handle, "compatible", &compatible);
ACPI_STATUS acpi_dsd_string(ACPI_HANDLE, const char *, char **);
rv = acpi_dsd_string(handle, "snps,axi-config", &sval);
rv = acpi_dsd_string(handle, "phy-mode", &phy_mode);