• Srinivas Pandruvada's avatar
    ACPI: DPTF: Add PCH FIVR participant driver · 2ce6324e
    Srinivas Pandruvada authored
    This driver adds support for Dynamic Platform and Thermal Framework
    (DPTF) PCH (Platform Controller Hub) FIVR (Fully Integrated Voltage
    Regulator) participant support.
    
    This participant is responsible for exposing platform telemetry and
    control for:
    	freq_mhz_high_clock
    	freq_mhz_low_clock
    
    These attributes are used to get and set PCH FIVR switching frequency
    for thermal and radio frequency interference mitigation.
    
    Refer to Documentation/ABI/testing/sysfs-platform-dptf for ABI details.
    
    ACPI methods description used in this driver:
    RFC0: This ACPI method to set PCH FIVR switching frequency when FIVR
    clock is 19.2MHz or 24MHz. The ACPI method takes a DWORD value.
    GFC0: This ACPI method to get PCH FIVR switching frequency when FIVR
    clock is 19.2MHz or 24MHz.
    RFC1: This ACPI method to set PCH FIVR switching frequency when FIVR
    clock is 38.4MHz. The ACPI method takes a DWORD value.
    GFC1: This ACPI method to get PCH FIVR switching frequency when FIVR
    clock is 38.4MHz.
    Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    2ce6324e
sysfs-platform-dptf 3.57 KB