Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux

Pull thermal management updates from Zhang Rui:

 - Fix a problem where orderly_shutdown() is called for multiple times
   due to multiple critical overheating events raised in a short period
   by platform thermal driver. (Keerthy)

 - Introduce a backup thermal shutdown mechanism, which invokes
   kernel_power_off()/emergency_restart() directly, after
   orderly_shutdown() being issued for certain amount of time(specified
   via Kconfig). This is useful in certain conditions that userspace may
   be unable to power off the system in a clean manner and leaves the
   system in a critical state, like in the middle of driver probing
   phase. (Keerthy)

 - Introduce a new interface in thermal devfreq_cooling code so that the
   driver can provide more precise data regarding actual power to the
   thermal governor every time the power budget is calculated. (Lukasz
   Luba)

 - Introduce BCM 2835 soc thermal driver and northstar thermal driver,
   within a new sub-folder. (Rafał Miłecki)

 - Introduce DA9062/61 thermal driver. (Steve Twiss)

 - Remove non-DT booting on TI-SoC driver. Also add support to fetching
   coefficients from DT. (Keerthy)

 - Refactorf RCAR Gen3 thermal driver. (Niklas Söderlund)

 - Small fix on MTK and intel-soc-dts thermal driver. (Dawei Chien,
   Brian Bian)

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits)
  thermal: core: Add a back up thermal shutdown mechanism
  thermal: core: Allow orderly_poweroff to be called only once
  Thermal: Intel SoC DTS: Change interrupt request behavior
  trace: thermal: add another parameter 'power' to the tracing function
  thermal: devfreq_cooling: add new interface for direct power read
  thermal: devfreq_cooling: refactor code and add get_voltage function
  thermal: mt8173: minor mtk_thermal.c cleanups
  thermal: bcm2835: move to the broadcom subdirectory
  thermal: broadcom: ns: specify myself as MODULE_AUTHOR
  thermal: da9062/61: Thermal junction temperature monitoring driver
  Documentation: devicetree: thermal: da9062/61 TJUNC temperature binding
  thermal: broadcom: add Northstar thermal driver
  dt-bindings: thermal: add support for Broadcom's Northstar thermal
  thermal: bcm2835: add thermal driver for bcm2835 SoC
  dt-bindings: Add thermal zone to bcm2835-thermal example
  thermal: rcar_gen3_thermal: add suspend and resume support
  thermal: rcar_gen3_thermal: store device match data in private structure
  thermal: rcar_gen3_thermal: enable hardware interrupts for trip points
  thermal: rcar_gen3_thermal: record and check number of TSCs found
  thermal: rcar_gen3_thermal: check that TSC exists before memory allocation
  ...

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h
index c35d0c0e0ada..4635f95000a4 100644
--- a/include/linux/devfreq_cooling.h
+++ b/include/linux/devfreq_cooling.h
@@ -34,6 +34,23 @@
  *			If get_dynamic_power() is NULL, then the
  *			dynamic power is calculated as
  *			@dyn_power_coeff * frequency * voltage^2
+ * @get_real_power:	When this is set, the framework uses it to ask the
+ *			device driver for the actual power.
+ *			Some devices have more sophisticated methods
+ *			(like power counters) to approximate the actual power
+ *			that they use.
+ *			This function provides more accurate data to the
+ *			thermal governor. When the driver does not provide
+ *			such function, framework just uses pre-calculated
+ *			table and scale the power by 'utilization'
+ *			(based on 'busy_time' and 'total_time' taken from
+ *			devfreq 'last_status').
+ *			The value returned by this function must be lower
+ *			or equal than the maximum power value
+ *			for the current	state
+ *			(which can be found in power_table[state]).
+ *			When this interface is used, the power_table holds
+ *			max total (static + dynamic) power value for each OPP.
  */
 struct devfreq_cooling_power {
 	unsigned long (*get_static_power)(struct devfreq *devfreq,
@@ -41,6 +58,8 @@ struct devfreq_cooling_power {
 	unsigned long (*get_dynamic_power)(struct devfreq *devfreq,
 					   unsigned long freq,
 					   unsigned long voltage);
+	int (*get_real_power)(struct devfreq *df, u32 *power,
+			      unsigned long freq, unsigned long voltage);
 	unsigned long dyn_power_coeff;
 };