Hi Kevin, On 5 June 2017 at 11:07, Tao Wang <kevin.wang...@hisilicon.com> wrote: > cpu idle cooling driver performs synchronized idle injection across > all cpu in same cluster, offers a new method to cooling down cpu, > that is similar to intel_power_clamp driver, but is basically > designed for ARM platform. > Each cluster has its own idle cooling device, each core has its own > idle injection thread, idle injection thread use play_idle to enter > idle. In order to reach deepest idle state, all cores are aligned by > jiffies. the injected idle ratio can be controlled through cooling > device interface. > > Signed-off-by: Tao Wang <kevin.wang...@hisilicon.com> > --- > drivers/thermal/Kconfig | 13 + > drivers/thermal/Makefile | 3 + > drivers/thermal/cpu_idle_cooling.c | 648 > ++++++++++++++++++++++++++++++++++++ > 3 files changed, 664 insertions(+) > create mode 100644 drivers/thermal/cpu_idle_cooling.c > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > index b5b5fac..f78e85c 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -154,6 +154,19 @@ config CPU_THERMAL > > If you want this support, you should say Y here. > > +config CPU_IDLE_THERMAL > + tristate "generic cpu idle cooling support" > + depends on CPU_FREQ
Does CPU_IDLE_THERMAL really depend on CPU_FREQ ? This dependency should be put for CPU_THERMAL_COMBO in the patch 2 > + help > + This implements the generic cpu cooling mechanism through idle > + injection. > + > + This will throttle cpu by injecting specified idle time in > + a fixed cycle. All cpu in same cluster will enter idle synchronously > + to reach deepest idle state when injecting idle. > + > + If you want this support, you should say Y here. > + > config CLOCK_THERMAL > bool "Generic clock cooling support" > depends on COMMON_CLK > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index 094d703..a4db66e 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -26,6 +26,9 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o > # devfreq cooling > thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o > > +# cpu idle cooling > +obj-$(CONFIG_CPU_IDLE_THERMAL) += cpu_idle_cooling.o > + > # platform thermal drivers > obj-y += broadcom/ > obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o > diff --git a/drivers/thermal/cpu_idle_cooling.c > b/drivers/thermal/cpu_idle_cooling.c > new file mode 100644 > index 0000000..89a15c5 > --- /dev/null [snip]
