Merge tag 'pm-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "Traditionally, cpufreq is the area with the greatest number of
  changes, but there are fewer of them than last time. There also is
  some activity in the generic power domains and the devfreq frameworks,
  a couple of system suspend and hibernation fixes and some assorted
  changes in other places.

  One new feature is the cpufreq change to allow the scheduler to pass
  hints to the governors' utilization update callbacks and some code
  rework based on that. Another one is the support for domain removal in
  the generic power domains framework. Also it is now possible to use
  hibernation with PAGE_POISONING_ZERO enabled and devfreq supports the
  RockChip DFI controller and the rk3399 DMC.

  The rest of the changes is mostly fixes and cleanups in a number of
  places.

  Specifics:

   - Add a mechanism for passing hints from the scheduler to cpufreq
     governors via their utilization update callbacks and use it to
     introduce "IOwait boosting" into the schedutil governor and
     intel_pstate that will make them boost performance if the enqueued
     task was previously waiting on I/O (Rafael Wysocki).

   - Fix a schedutil governor problem that causes it to overestimate
     utilization if SMT is in use (Steve Muckle).

   - Update defconfigs trying to use the schedutil governor as a module
     which is not possible any more (Javier Martinez Canillas).

   - Update the intel_pstate's pstate_sample tracepoint to take "IOwait
     boosting" into account (Srinivas Pandruvada).

   - Fix a problem in the cpufreq core causing it to mishandle the
     initialization of CPUs registered after the cpufreq driver (Viresh
     Kumar, Rafael Wysocki).

   - Make the cpufreq-dt driver support per-policy governor tunables,
     clean it up and update its Kconfig description (Viresh Kumar).

   - Add support for more ARM platforms to the cpufreq-dt driver
     (Chanwoo Choi, Dave Gerlach, Geert Uytterhoeven).

   - Make the cpufreq CPPC driver report frequencies in KHz to avoid
     user space compatiblility issues (Al Stone, Hoan Tran).

   - Clean up a few cpufreq drivers (st, kirkwood, SCPI) a bit (Colin
     Ian King, Markus Elfring).

   - Constify some local structures in the intel_pstate driver (Julia
     Lawall).

   - Add a Documentation/cpu-freq/ entry to MAINTAINERS (Jean Delvare).

   - Add support for PM domain removal to the generic power domains
     (genpd) framework, add new DT helper functions to it and make it
     always enable debugfs support if available (Jon Hunter, Tomeu
     Vizoso).

   - Clean up the generic power domains (genpd) framework and make it
     avoid measuring power-on and power-off latencies during system-wide
     PM transitions (Ulf Hansson).

   - Add support for the RockChip DFI controller and the rk3399 DMC to
     the devfreq framework (Lin Huang, Axel Lin, Arnd Bergmann).

   - Add COMPILE_TEST to the devfreq framework (Krzysztof Kozlowski,
     Stephen Rothwell).

   - Fix a minor issue in the exynos-ppmu devfreq driver and fix up
     devfreq Kconfig indentation style (Wei Yongjun, Jisheng Zhang).

   - Fix the system suspend interface to make suspend-to-idle work if
     platform suspend operations have not been registered (Sudeep
     Holla).

   - Make it possible to use hibernation with PAGE_POISONING_ZERO
     enabled (Anisse Astier).

   - Increas the default timeout of the system suspend/resume watchdog
     and make it depend on EXPERT (Chen Yu).

   - Make the operating performance points (OPP) framework avoid using
     OPPs that aren't supported by the platform and fix a build warning
     in it (Dave Gerlach, Arnd Bergmann).

   - Fix the ARM cpuidle driver's return value (Christophe Jaillet).

   - Make the SmartReflex AVS (Adaptive Voltage Scaling) driver use more
     common logging style (Joe Perches)"

* tag 'pm-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (58 commits)
  PM / OPP: Don't support OPP if it provides supported-hw but platform does not
  cpufreq: st: add missing \n to end of dev_err message
  cpufreq: kirkwood: add missing \n to end of dev_err messages
  PM / Domains: Rename pm_genpd_sync_poweron|poweroff()
  PM / Domains: Don't measure latency of ->power_on|off() during system PM
  PM / Domains: Remove redundant system PM callbacks
  PM / Domains: Simplify detaching a device from its genpd
  PM / devfreq: rk3399_dmc: Remove explictly regulator_put call in .remove
  PM / devfreq: rockchip: add PM_DEVFREQ_EVENT dependency
  PM / OPP: avoid maybe-uninitialized warning
  PM / Domains: Allow holes in genpd_data.domains array
  cpufreq: CPPC: Avoid overflow when calculating desired_perf
  cpufreq: ti: Use generic platdev driver
  cpufreq: intel_pstate: Add io_boost trace
  partial revert of "PM / devfreq: Add COMPILE_TEST for build coverage"
  cpufreq: intel_pstate: Use IOWAIT flag in Atom algorithm
  cpufreq: schedutil: Add iowait boosting
  cpufreq / sched: SCHED_CPUFREQ_IOWAIT flag to indicate iowait condition
  PM / Domains: Add support for removing nested PM domains by provider
  PM / Domains: Add support for removing PM domains
  ...

2 files changed, 228 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt b/Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt
new file mode 100644
index 000000000000..f2233138eba9
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt
@@ -0,0 +1,19 @@
+
+* Rockchip rk3399 DFI device
+
+Required properties:
+- compatible: Must be "rockchip,rk3399-dfi".
+- reg: physical base address of each DFI and length of memory mapped region
+- rockchip,pmu: phandle to the syscon managing the "pmu general register files"
+- clocks: phandles for clock specified in "clock-names" property
+- clock-names : the name of clock used by the DFI, must be "pclk_ddr_mon";
+
+Example:
+	dfi: dfi@0xff630000 {
+		compatible = "rockchip,rk3399-dfi";
+		reg = <0x00 0xff630000 0x00 0x4000>;
+		rockchip,pmu = <&pmugrf>;
+		clocks = <&cru PCLK_DDR_MON>;
+		clock-names = "pclk_ddr_mon";
+		status = "disabled";
+	};
diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
new file mode 100644
index 000000000000..7a9e8603c150
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
@@ -0,0 +1,209 @@
+* Rockchip rk3399 DMC(Dynamic Memory Controller) device
+
+Required properties:
+- compatible:		 Must be "rockchip,rk3399-dmc".
+- devfreq-events:	 Node to get DDR loading, Refer to
+			 Documentation/devicetree/bindings/devfreq/
+			 rockchip-dfi.txt
+- interrupts:		 The interrupt number to the CPU. The interrupt
+			 specifier format depends on the interrupt controller.
+			 It should be DCF interrupts, when DDR dvfs finish,
+			 it will happen.
+- clocks:		 Phandles for clock specified in "clock-names" property
+- clock-names :		 The name of clock used by the DFI, must be
+			 "pclk_ddr_mon";
+- operating-points-v2:	 Refer to Documentation/devicetree/bindings/power/opp.txt
+			 for details.
+- center-supply:	 DMC supply node.
+- status:		 Marks the node enabled/disabled.
+
+Following properties are ddr timing:
+
+- rockchip,dram_speed_bin :	  Value reference include/dt-bindings/clock/ddr.h,
+				  it select ddr3 cl-trp-trcd type, default value
+				  "DDR3_DEFAULT".it must selected according to
+				  "Speed Bin" in ddr3 datasheet, DO NOT use
+				  smaller "Speed Bin" than ddr3 exactly is.
+
+- rockchip,pd_idle :		  Config the PD_IDLE value, defined the power-down
+				  idle period, memories are places into power-down
+				  mode if bus is idle for PD_IDLE DFI clocks.
+
+- rockchip,sr_idle :		  Configure the SR_IDLE value, defined the
+				  selfrefresh idle period, memories are places
+				  into self-refresh mode if bus is idle for
+				  SR_IDLE*1024 DFI clocks (DFI clocks freq is
+				  half of dram's clocks), defaule value is "0".
+
+- rockchip,sr_mc_gate_idle :	  Defined the self-refresh with memory and
+				  controller clock gating idle period, memories
+				  are places into self-refresh mode and memory
+				  controller clock arg gating if bus is idle for
+				  sr_mc_gate_idle*1024 DFI clocks.
+
+- rockchip,srpd_lite_idle :	  Defined the self-refresh power down idle
+				  period, memories are places into self-refresh
+				  power down mode if bus is idle for
+				  srpd_lite_idle*1024 DFI clocks. This parameter
+				  is for LPDDR4 only.
+
+- rockchip,standby_idle :	  Defined the standby idle period, memories are
+				  places into self-refresh than controller, pi,
+				  phy and dram clock will gating if bus is idle
+				  for standby_idle * DFI clocks.
+
+- rockchip,dram_dll_disb_freq :  It's defined the DDR3 dll bypass frequency in
+				  MHz, when ddr freq less than DRAM_DLL_DISB_FREQ,
+				  ddr3 dll will bypssed note: if dll was bypassed,
+				  the odt also stop working.
+
+- rockchip,phy_dll_disb_freq :	  Defined the PHY dll bypass frequency in
+				  MHz (Mega Hz), when ddr freq less than
+				  DRAM_DLL_DISB_FREQ, phy dll will bypssed.
+				  note: phy dll and phy odt are independent.
+
+- rockchip,ddr3_odt_disb_freq :  When dram type is DDR3, this parameter defined
+				  the odt disable frequency in MHz (Mega Hz),
+				  when ddr frequency less then ddr3_odt_disb_freq,
+				  the odt on dram side and controller side are
+				  both disabled.
+
+- rockchip,ddr3_drv :		  When dram type is DDR3, this parameter define
+				  the dram side driver stength in ohm, default
+				  value is DDR3_DS_40ohm.
+
+- rockchip,ddr3_odt :		  When dram type is DDR3, this parameter define
+				  the dram side ODT stength in ohm, default value
+				  is DDR3_ODT_120ohm.
+
+- rockchip,phy_ddr3_ca_drv :	  When dram type is DDR3, this parameter define
+				  the phy side CA line(incluing command line,
+				  address line and clock line) driver strength.
+				  Default value is PHY_DRV_ODT_40.
+
+- rockchip,phy_ddr3_dq_drv :	  When dram type is DDR3, this parameter define
+				  the phy side DQ line(incluing DQS/DQ/DM line)
+				  driver strength. default value is PHY_DRV_ODT_40.
+
+- rockchip,phy_ddr3_odt : 	  When dram type is DDR3, this parameter define the
+				  phy side odt strength, default value is
+				  PHY_DRV_ODT_240.
+
+- rockchip,lpddr3_odt_disb_freq : When dram type is LPDDR3, this parameter defined
+				  then odt disable frequency in MHz (Mega Hz),
+				  when ddr frequency less then ddr3_odt_disb_freq,
+				  the odt on dram side and controller side are
+				  both disabled.
+
+- rockchip,lpddr3_drv :	  When dram type is LPDDR3, this parameter define
+				  the dram side driver stength in ohm, default
+				  value is LP3_DS_34ohm.
+
+- rockchip,lpddr3_odt :	  When dram type is LPDDR3, this parameter define
+				  the dram side ODT stength in ohm, default value
+				  is LP3_ODT_240ohm.
+
+- rockchip,phy_lpddr3_ca_drv :	  When dram type is LPDDR3, this parameter define
+				  the phy side CA line(incluing command line,
+				  address line and clock line) driver strength.
+				  default value is PHY_DRV_ODT_40.
+
+- rockchip,phy_lpddr3_dq_drv :	  When dram type is LPDDR3, this parameter define
+				  the phy side DQ line(incluing DQS/DQ/DM line)
+				  driver strength. default value is
+				  PHY_DRV_ODT_40.
+
+- rockchip,phy_lpddr3_odt : 	  When dram type is LPDDR3, this parameter define
+				  the phy side odt strength, default value is
+				  PHY_DRV_ODT_240.
+
+- rockchip,lpddr4_odt_disb_freq : When dram type is LPDDR4, this parameter
+				  defined the odt disable frequency in
+				  MHz (Mega Hz), when ddr frequency less then
+				  ddr3_odt_disb_freq, the odt on dram side and
+				  controller side are both disabled.
+
+- rockchip,lpddr4_drv :	  When dram type is LPDDR4, this parameter define
+				  the dram side driver stength in ohm, default
+				  value is LP4_PDDS_60ohm.
+
+- rockchip,lpddr4_dq_odt : 	  When dram type is LPDDR4, this parameter define
+				  the dram side ODT on dqs/dq line stength in ohm,
+				  default value is LP4_DQ_ODT_40ohm.
+
+- rockchip,lpddr4_ca_odt :	  When dram type is LPDDR4, this parameter define
+				  the dram side ODT on ca line stength in ohm,
+				  default value is LP4_CA_ODT_40ohm.
+
+- rockchip,phy_lpddr4_ca_drv :	  When dram type is LPDDR4, this parameter define
+				  the phy side  CA line(incluing command address
+				  line) driver strength. default value is
+				  PHY_DRV_ODT_40.
+
+- rockchip,phy_lpddr4_ck_cs_drv : When dram type is LPDDR4, this parameter define
+				  the phy side clock line and cs line driver
+				  strength. default value is PHY_DRV_ODT_80.
+
+- rockchip,phy_lpddr4_dq_drv :	  When dram type is LPDDR4, this parameter define
+				  the phy side DQ line(incluing DQS/DQ/DM line)
+				  driver strength. default value is PHY_DRV_ODT_80.
+
+- rockchip,phy_lpddr4_odt :	  When dram type is LPDDR4, this parameter define
+				  the phy side odt strength, default value is
+				  PHY_DRV_ODT_60.
+
+Example:
+	dmc_opp_table: dmc_opp_table {
+		compatible = "operating-points-v2";
+
+		opp00 {
+			opp-hz = /bits/ 64 <300000000>;
+			opp-microvolt = <900000>;
+		};
+		opp01 {
+			opp-hz = /bits/ 64 <666000000>;
+			opp-microvolt = <900000>;
+		};
+	};
+
+	dmc: dmc {
+		compatible = "rockchip,rk3399-dmc";
+		devfreq-events = <&dfi>;
+		interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru SCLK_DDRCLK>;
+		clock-names = "dmc_clk";
+		operating-points-v2 = <&dmc_opp_table>;
+		center-supply = <&ppvar_centerlogic>;
+		upthreshold = <15>;
+		downdifferential = <10>;
+		rockchip,ddr3_speed_bin = <21>;
+		rockchip,pd_idle = <0x40>;
+		rockchip,sr_idle = <0x2>;
+		rockchip,sr_mc_gate_idle = <0x3>;
+		rockchip,srpd_lite_idle	= <0x4>;
+		rockchip,standby_idle = <0x2000>;
+		rockchip,dram_dll_dis_freq = <300>;
+		rockchip,phy_dll_dis_freq = <125>;
+		rockchip,auto_pd_dis_freq = <666>;
+		rockchip,ddr3_odt_dis_freq = <333>;
+		rockchip,ddr3_drv = <DDR3_DS_40ohm>;
+		rockchip,ddr3_odt = <DDR3_ODT_120ohm>;
+		rockchip,phy_ddr3_ca_drv = <PHY_DRV_ODT_40>;
+		rockchip,phy_ddr3_dq_drv = <PHY_DRV_ODT_40>;
+		rockchip,phy_ddr3_odt = <PHY_DRV_ODT_240>;
+		rockchip,lpddr3_odt_dis_freq = <333>;
+		rockchip,lpddr3_drv = <LP3_DS_34ohm>;
+		rockchip,lpddr3_odt = <LP3_ODT_240ohm>;
+		rockchip,phy_lpddr3_ca_drv = <PHY_DRV_ODT_40>;
+		rockchip,phy_lpddr3_dq_drv = <PHY_DRV_ODT_40>;
+		rockchip,phy_lpddr3_odt = <PHY_DRV_ODT_240>;
+		rockchip,lpddr4_odt_dis_freq = <333>;
+		rockchip,lpddr4_drv = <LP4_PDDS_60ohm>;
+		rockchip,lpddr4_dq_odt = <LP4_DQ_ODT_40ohm>;
+		rockchip,lpddr4_ca_odt = <LP4_CA_ODT_40ohm>;
+		rockchip,phy_lpddr4_ca_drv = <PHY_DRV_ODT_40>;
+		rockchip,phy_lpddr4_ck_cs_drv = <PHY_DRV_ODT_80>;
+		rockchip,phy_lpddr4_dq_drv = <PHY_DRV_ODT_80>;
+		rockchip,phy_lpddr4_odt = <PHY_DRV_ODT_60>;
+		status = "disabled";
+	};