• Srinivas Pandruvada's avatar
    ACPI / DPTF: Add DPTF power participant driver · 6256ebd5
    Srinivas Pandruvada authored
    This driver adds support for Dynamic Platform and Thermal Framework
    (DPTF) Platform Power Participant device (INT3407) support.
    
    This participant is responsible for exposing platform telemetry such as:
        max_platform_power
        platform_power_source
        adapter_rating
        battery_steady_power
        charger_type
    
    These attributes are presented via sysfs interface under the INT3407
    platform device:
    $ls /sys/bus/platform/devices/INT3407\:00/dptf_power/
        adapter_rating_mw
        battery_steady_power_mw
        charger_type
        max_platform_power_mw
        platform_power_source
        `
    ACPI methods description used in this driver:
        PMAX: Maximum platform power that can be supported by the battery in
              mW.
        PSRC: System charge source,
                0x00 = DC
                0x01 = AC
                0x02 = USB
                0x03 = Wireless Charger
        ARTG: Adapter rating in mW (Maximum Adapter power) Must be 0 if no
              AC adapter is plugged in.
        CTYP: Charger Type,
                Traditional : 0x01
                Hybrid: 0x02
                NVDC: 0x03
        PBSS: Returns max sustained power for battery in milliWatts.
    
    The INT3407 also contains _BTS and _BIX objects, which are compliant to
    ACPI 5.0, specification. Those objects are already used by ACPI battery
    (PNP0C0A) driver and information about them is exported via Linux power
    supply class registration.
    Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    6256ebd5
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