• Harald Welte's avatar
    [CPUFREQ] Enable ACPI PDC handshake for VIA/Centaur CPUs · d77b8197
    Harald Welte authored
    In commit 0de51088
    , we introduced the
    use of acpi-cpufreq on VIA/Centaur CPU's by removing a vendor check for
    VENDOR_INTEL.  However, as it turns out, at least the Nano CPU's also
    need the PDC (processor driver capabilities) handshake in order to
    activate the methods required for acpi-cpufreq.
    Since arch_acpi_processor_init_pdc() contains another vendor check for
    Intel, the PDC is not initialized on VIA CPU's.  The resulting behavior
    of a current mainline kernel on such systems is:  acpi-cpufreq
    loads and it indicates CPU frequency changes.  However, the CPU stays at
    a single frequency
    This trivial patch ensures that init_intel_pdc() is called on Intel and
    VIA/Centaur CPU's alike.
    Signed-off-by: default avatarHarald Welte <HaraldWelte@viatech.com>
    Signed-off-by: default avatarDave Jones <davej@redhat.com>
processor.c 2.25 KB