On 09/18/2019 10:18 PM, Thara Gopinath wrote: > Thermal framework today supports monitoring for rising temperatures and > subsequently initiating cooling action in case of a trip point being > crossed. There are scenarios where a SoC needs some warming action to be > activated if the temperature falls below a cetain allowable limit. > Since warming action can be considered mirror opposite of cooling action, > most of the thermal framework can be re-used to achieve this. > > To enable thermal framework to monitor falling temperature, a new parameter > is added to the thermal trip point binding in the device tree to indicate > the direction(rising/falling) of temperature monitoring. Thermal DT > driver is extended to capture this information from the device tree > entries and to reflect it in the thermal framework as a new enum > variable in the thermal trip point structure. > As an initial attempt, step-wise governor is extended to support > bi-directional monitoring of temprature if a trip point is hit, depending > on the newly introduced enum variable. Finally thermal sysfs entries are > extended to indicate the trip point monitor direction. > > Patch series introducing various resources that are used as warming devices > on Qualcomm sdm845: > https://lkml.org/lkml/2019/7/29/749 (already merged) > > https://lkml.org/lkml/2019/9/10/727 (under review) Gentle reminder for reviews! > > > Thara Gopinath (4): > dt-bindings: thermal: Introduce monitor-falling binding to thermal > trip point description > thermal: Thermal core and sysfs changes needed to support > bi-directional monitoring of trip points. > thermal: of-thermal: Extend thermal dt driver to support > bi-directional monitoring of a thermal trip point. > thermal: step_wise: Extend thermal step-wise governor to monitor > falling temperature. > > .../devicetree/bindings/thermal/thermal.txt | 8 +++ > drivers/thermal/of-thermal.c | 22 ++++++++ > drivers/thermal/step_wise.c | 59 +++++++++++++++------ > drivers/thermal/thermal_sysfs.c | 60 ++++++++++++++++++++-- > include/linux/thermal.h | 10 ++++ > include/uapi/linux/thermal.h | 2 +- > 6 files changed, 141 insertions(+), 20 deletions(-) > -- Warm Regards Thara
