• Srinivas Pandruvada's avatar
    thermal: Intel SoC DTS thermal · bc40b5e3
    Srinivas Pandruvada authored
    In the Intel SoCs like Bay Trail, there are 2 additional digital temperature
    sensors(DTS), in addition to the standard DTSs in the core. Also they support
    4 programmable thresholds, out of which two can be used by OSPM. These
    thresholds can be used by OSPM thermal control. Out of these two thresholds,
    one is used by driver and one user mode can change via thermal sysfs to get
    notifications on threshold violations.
    
    The driver defines one critical trip points, which is set to TJ MAX - offset.
    The offset can be changed via module parameter (default 5C). Also it uses
    one of the thresholds to get notification for this temperature violation.
    This is very important for orderly shutdown as the many of these devices don't
    have ACPI thermal zone, and expects that there is some other thermal control
    mechanism present in OSPM. When a Linux distro is used without additional
    specialized thermal control program, BIOS can do force shutdown when thermals
    are not under control. When temperature reaches critical, the Linux thermal
    core will initiate an orderly shutdown.
    Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
    bc40b5e3
Makefile 1.24 KB