Power management updates for 6.7-rc1

- Add support for several Qualcomm SoC versions and other similar
    changes (Christian Marangi, Dmitry Baryshkov, Luca Weiss, Neil
    Armstrong, Richard Acayan, Robert Marko, Rohit Agarwal, Stephan
    Gerhold and Varadarajan Narayanan).
 
  - Clean up the tegra cpufreq driver (Sumit Gupta).
 
  - Use of_property_read_reg() to parse "reg" in pmac32 driver (Rob
    Herring).
 
  - Add support for TI's am62p5 Soc (Bryan Brattlof).
 
  - Make ARM_BRCMSTB_AVS_CPUFREQ depends on !ARM_SCMI_CPUFREQ (Florian
    Fainelli).
 
  - Update Kconfig to mention i.MX7 as well (Alexander Stein).
 
  - Revise global turbo disable check in intel_pstate (Srinivas
    Pandruvada).
 
  - Carry out initialization of sg_cpu in the schedutil cpufreq governor
    in one loop (Liao Chang).
 
  - Simplify the condition for storing 'down_threshold' in the
    conservative cpufreq governor (Liao Chang).
 
  - Use fine-grained mutex in the userspace cpufreq governor (Liao
    Chang).
 
  - Move is_managed indicator in the userspace cpufreq governor into a
    per-policy structure (Liao Chang).
 
  - Rebuild sched-domains when removing cpufreq driver (Pierre Gondois).
 
  - Fix buffer overflow detection in trans_stats() (Christian Marangi).
 
  - Switch to dev_pm_opp_find_freq_(ceil/floor)_indexed() APIs to support
    specific devices like UFS which handle multiple clocks through OPP
    (Operating Performance Point) framework (Manivannan Sadhasivam).
 
  - Add perf support to the Rockchip DFI (DDR Monitor Module) devfreq-
    event driver:
    * Generalize rockchip-dfi.c to support new RK3568/RK3588 using
      different DDR type (Sascha Hauer).
    * Convert DT binding document format to yaml (Sascha Hauer).
    * Add perf support for DFI (a unit suitable for measuring DDR
      utilization) to rockchip-dfi.c to extend DFI usage (Sascha Hauer).
 
  - Add locking to the OPP handling code in the Mediatek CCI devfreq
    driver, because the voltage of shared OPP might be changed by
    multiple drivers (Mark Tseng, Dan Carpenter).
 
  - Use device_get_match_data() in the Samsung Exynos PPMU devfreq-event
    driver (Rob Herring).
 
  - Extend support for the opp-level beyond required-opps (Ulf Hansson).
 
  - Add dev_pm_opp_find_level_floor() (Krishna chaitanya chundru).
 
  - dt-bindings: Allow opp-peak-kBpsfor kryo CPUs, support Qualcomm Krait
    SoCs and document named opp-microvolt property (Bjorn Andersson,
    Dmitry Baryshkov and Christian Marangi).
 
  - Fix -Wunsequenced warning _of_add_opp_table_v1() (Nathan Chancellor).
 
  - General cleanup of OPP code (Viresh Kumar).
 
  - Use __get_safe_page() rather than touching the list in hibernation
    snapshot code (Brian Geffon).
 
  - Fix symbol export for _SIMPLE_ variants of _PM_OPS() (Raag Jadav).
 
  - Clean up sync_read handling in snapshot_write_next() (Brian Geffon).
 
  - Fix kerneldoc comments for swsusp_check() and swsusp_close() to
    better match code (Christoph Hellwig).
 
  - Downgrade BIOS locked limits pr_warn() in the Intel RAPL power
    capping driver to pr_debug() (Ville Syrjälä).
 
  - Change the minimum python version for the intel_pstate_tracer utility
    from 2.7 to 3.6 (Doug Smythies).
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Merge tag 'pm-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add new hardware support (new Qualcomm SoC versions in cpufreq,
  RK3568/RK3588 in devfreq), extend the OPP (operating performance
  points) framework, improve cpufreq governors, fix issues and clean up
  code (most of the changes are in cpufreq and devfreq).

  Specifics:

   - Add support for several Qualcomm SoC versions and other similar
     changes (Christian Marangi, Dmitry Baryshkov, Luca Weiss, Neil
     Armstrong, Richard Acayan, Robert Marko, Rohit Agarwal, Stephan
     Gerhold and Varadarajan Narayanan)

   - Clean up the tegra cpufreq driver (Sumit Gupta)

   - Use of_property_read_reg() to parse "reg" in pmac32 driver (Rob
     Herring)

   - Add support for TI's am62p5 Soc (Bryan Brattlof)

   - Make ARM_BRCMSTB_AVS_CPUFREQ depends on !ARM_SCMI_CPUFREQ (Florian
     Fainelli)

   - Update Kconfig to mention i.MX7 as well (Alexander Stein)

   - Revise global turbo disable check in intel_pstate (Srinivas
     Pandruvada)

   - Carry out initialization of sg_cpu in the schedutil cpufreq
     governor in one loop (Liao Chang)

   - Simplify the condition for storing 'down_threshold' in the
     conservative cpufreq governor (Liao Chang)

   - Use fine-grained mutex in the userspace cpufreq governor (Liao
     Chang)

   - Move is_managed indicator in the userspace cpufreq governor into a
     per-policy structure (Liao Chang)

   - Rebuild sched-domains when removing cpufreq driver (Pierre Gondois)

   - Fix buffer overflow detection in trans_stats() (Christian Marangi)

   - Switch to dev_pm_opp_find_freq_(ceil/floor)_indexed() APIs to
     support specific devices like UFS which handle multiple clocks
     through OPP (Operating Performance Point) framework (Manivannan
     Sadhasivam)

   - Add perf support to the Rockchip DFI (DDR Monitor Module) devfreq-
     event driver:
      * Generalize rockchip-dfi.c to support new RK3568/RK3588 using
        different DDR type (Sascha Hauer).
      * Convert DT binding document format to yaml (Sascha Hauer).
      * Add perf support for DFI (a unit suitable for measuring DDR
        utilization) to rockchip-dfi.c to extend DFI usage (Sascha
        Hauer)

   - Add locking to the OPP handling code in the Mediatek CCI devfreq
     driver, because the voltage of shared OPP might be changed by
     multiple drivers (Mark Tseng, Dan Carpenter)

   - Use device_get_match_data() in the Samsung Exynos PPMU
     devfreq-event driver (Rob Herring)

   - Extend support for the opp-level beyond required-opps (Ulf Hansson)

   - Add dev_pm_opp_find_level_floor() (Krishna chaitanya chundru)

   - dt-bindings: Allow opp-peak-kBpsfor kryo CPUs, support Qualcomm
     Krait SoCs and document named opp-microvolt property (Bjorn
     Andersson, Dmitry Baryshkov and Christian Marangi)

   - Fix -Wunsequenced warning _of_add_opp_table_v1() (Nathan
     Chancellor)

   - General cleanup of OPP code (Viresh Kumar)

   - Use __get_safe_page() rather than touching the list in hibernation
     snapshot code (Brian Geffon)

   - Fix symbol export for _SIMPLE_ variants of _PM_OPS() (Raag Jadav)

   - Clean up sync_read handling in snapshot_write_next() (Brian Geffon)

   - Fix kerneldoc comments for swsusp_check() and swsusp_close() to
     better match code (Christoph Hellwig)

   - Downgrade BIOS locked limits pr_warn() in the Intel RAPL power
     capping driver to pr_debug() (Ville Syrjälä)

   - Change the minimum python version for the intel_pstate_tracer
     utility from 2.7 to 3.6 (Doug Smythies)"

* tag 'pm-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (82 commits)
  dt-bindings: cpufreq: qcom-hw: document SM8650 CPUFREQ Hardware
  cpufreq: arm: Kconfig: Add i.MX7 to supported SoC for ARM_IMX_CPUFREQ_DT
  cpufreq: qcom-nvmem: add support for IPQ8064
  cpufreq: qcom-nvmem: also accept operating-points-v2-krait-cpu
  cpufreq: qcom-nvmem: drop pvs_ver for format a fuses
  dt-bindings: cpufreq: qcom-cpufreq-nvmem: Document krait-cpu
  cpufreq: qcom-nvmem: add support for IPQ6018
  dt-bindings: cpufreq: qcom-cpufreq-nvmem: document IPQ6018
  cpufreq: qcom-nvmem: Add MSM8909
  cpufreq: qcom-nvmem: Simplify driver data allocation
  powercap: intel_rapl: Downgrade BIOS locked limits pr_warn() to pr_debug()
  cpufreq: stats: Fix buffer overflow detection in trans_stats()
  dt-bindings: devfreq: event: rockchip,dfi: Add rk3588 support
  dt-bindings: devfreq: event: rockchip,dfi: Add rk3568 support
  dt-bindings: devfreq: event: convert Rockchip DFI binding to yaml
  PM / devfreq: rockchip-dfi: add support for RK3588
  PM / devfreq: rockchip-dfi: account for multiple DDRMON_CTRL registers
  PM / devfreq: rockchip-dfi: make register stride SoC specific
  PM / devfreq: rockchip-dfi: Add perf support
  PM / devfreq: rockchip-dfi: give variable a better name
  ...

Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml

@@ -23,6 +23,7 @@ properties:
           - enum:
               - qcom,qcm2290-cpufreq-hw
               - qcom,sc7180-cpufreq-hw
+              - qcom,sdm670-cpufreq-hw
               - qcom,sdm845-cpufreq-hw
               - qcom,sm6115-cpufreq-hw
               - qcom,sm6350-cpufreq-hw
@@ -36,11 +37,13 @@ properties:
               - qcom,sa8775p-cpufreq-epss
               - qcom,sc7280-cpufreq-epss
               - qcom,sc8280xp-cpufreq-epss
+              - qcom,sdx75-cpufreq-epss
               - qcom,sm6375-cpufreq-epss
               - qcom,sm8250-cpufreq-epss
               - qcom,sm8350-cpufreq-epss
               - qcom,sm8450-cpufreq-epss
               - qcom,sm8550-cpufreq-epss
+              - qcom,sm8650-cpufreq-epss
           - const: qcom,cpufreq-epss
 
   reg:
@@ -128,6 +131,7 @@ allOf:
               - qcom,qdu1000-cpufreq-epss
               - qcom,sc7180-cpufreq-hw
               - qcom,sc8280xp-cpufreq-epss
+              - qcom,sdm670-cpufreq-hw
               - qcom,sdm845-cpufreq-hw
               - qcom,sm6115-cpufreq-hw
               - qcom,sm6350-cpufreq-hw

Documentation/devicetree/bindings/cpufreq/qcom-cpufreq-nvmem.yaml

@@ -27,8 +27,12 @@ select:
         enum:
           - qcom,apq8064
           - qcom,apq8096
+          - qcom,ipq5332
+          - qcom,ipq6018
           - qcom,ipq8064
           - qcom,ipq8074
+          - qcom,ipq9574
+          - qcom,msm8909
           - qcom,msm8939
           - qcom,msm8960
           - qcom,msm8974
@@ -43,7 +47,9 @@ patternProperties:
       - if:
           properties:
             compatible:
-              const: operating-points-v2-kryo-cpu
+              enum:
+                - operating-points-v2-krait-cpu
+                - operating-points-v2-kryo-cpu
         then:
           $ref: /schemas/opp/opp-v2-kryo-cpu.yaml#
 

Documentation/devicetree/bindings/devfreq/event/rockchip,dfi.yaml

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/devfreq/event/rockchip,dfi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip DFI
+
+maintainers:
+  - Sascha Hauer <s.hauer@pengutronix.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3399-dfi
+      - rockchip,rk3568-dfi
+      - rockchip,rk3588-dfi
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: pclk_ddr_mon
+
+  interrupts:
+    minItems: 1
+    maxItems: 4
+
+  reg:
+    maxItems: 1
+
+  rockchip,pmu:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the syscon managing the "PMU general register files".
+
+required:
+  - compatible
+  - interrupts
+  - reg
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - rockchip,rk3399-dfi
+
+then:
+  required:
+    - clocks
+    - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/rk3308-cru.h>
+
+    bus {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      dfi: dfi@ff630000 {
+        compatible = "rockchip,rk3399-dfi";
+        reg = <0x00 0xff630000 0x00 0x4000>;
+        interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH 0>;
+        rockchip,pmu = <&pmugrf>;
+        clocks = <&cru PCLK_DDR_MON>;
+        clock-names = "pclk_ddr_mon";
+      };
+    };

Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt

@@ -1,18 +0,0 @@
-
-* 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@ff630000 {
-		compatible = "rockchip,rk3399-dfi";
-		reg = <0x00 0xff630000 0x00 0x4000>;
-		rockchip,pmu = <&pmugrf>;
-		clocks = <&cru PCLK_DDR_MON>;
-		clock-names = "pclk_ddr_mon";
-	};

Documentation/devicetree/bindings/memory-controllers/rockchip,rk3399-dmc.yaml

@@ -18,7 +18,7 @@ properties:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
       Node to get DDR loading. Refer to
-      Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt.
+      Documentation/devicetree/bindings/devfreq/event/rockchip,dfi.yaml.
 
   clocks:
     maxItems: 1

Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml

@@ -26,7 +26,9 @@ description: |
 
 properties:
   compatible:
-    const: operating-points-v2-kryo-cpu
+    enum:
+      - operating-points-v2-krait-cpu
+      - operating-points-v2-kryo-cpu
 
   nvmem-cells:
     description: |
@@ -47,6 +49,8 @@ patternProperties:
 
       opp-microvolt: true
 
+      opp-peak-kBps: true
+
       opp-supported-hw:
         description: |
           A single 32 bit bitmap value, representing compatible HW.
@@ -63,14 +67,22 @@ patternProperties:
           5:  MSM8996SG, speedbin 1
           6:  MSM8996SG, speedbin 2
           7-31:  unused
-        enum: [0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
-               0x9, 0xd, 0xe, 0xf,
-               0x10, 0x20, 0x30, 0x70]
+
+          Bitmap for IPQ806x SoC:
+          0:  IPQ8062
+          1:  IPQ8064/IPQ8066/IPQ8068
+          2:  IPQ8065/IPQ8069
+          3-31:  unused
+
+          Other platforms use bits directly corresponding to speedbin index.
 
       clock-latency-ns: true
 
       required-opps: true
 
+    patternProperties:
+      '^opp-microvolt-speed[0-9]+-pvs[0-9]+$': true
+
     required:
       - opp-hz
 
@@ -256,6 +268,22 @@ examples:
             };
         };
 
+        /* Dummy opp table to give example for named opp-microvolt */
+        opp-table-2 {
+            compatible = "operating-points-v2-krait-cpu";
+            nvmem-cells = <&speedbin_efuse>;
+
+            opp-384000000 {
+                opp-hz = /bits/ 64 <384000000>;
+                opp-microvolt-speed0-pvs0 = <1000000 950000 1050000>;
+                opp-microvolt-speed0-pvs1 = <925000 878750 971250>;
+                opp-microvolt-speed0-pvs2 = <875000 831250 918750>;
+                opp-microvolt-speed0-pvs3 = <800000 760000 840000>;
+                opp-supported-hw = <0x7>;
+                clock-latency-ns = <100000>;
+            };
+        };
+
         smem {
             compatible = "qcom,smem";
             memory-region = <&smem_mem>;

drivers/base/power/common.c

@@ -228,3 +228,24 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd)
 	device_pm_check_callbacks(dev);
 }
 EXPORT_SYMBOL_GPL(dev_pm_domain_set);
+
+/**
+ * dev_pm_domain_set_performance_state - Request a new performance state.
+ * @dev: The device to make the request for.
+ * @state: Target performance state for the device.
+ *
+ * This function should be called when a new performance state needs to be
+ * requested for a device that is attached to a PM domain. Note that, the
+ * support for performance scaling for PM domains is optional.
+ *
+ * Returns 0 on success and when performance scaling isn't supported, negative
+ * error code on failure.
+ */
+int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state)
+{
+	if (dev->pm_domain && dev->pm_domain->set_performance_state)
+		return dev->pm_domain->set_performance_state(dev, state);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dev_pm_domain_set_performance_state);

drivers/base/power/domain.c

@@ -419,6 +419,25 @@ static void genpd_restore_performance_state(struct device *dev,
 		genpd_set_performance_state(dev, state);
 }
 
+static int genpd_dev_pm_set_performance_state(struct device *dev,
+					      unsigned int state)
+{
+	struct generic_pm_domain *genpd = dev_to_genpd(dev);
+	int ret = 0;
+
+	genpd_lock(genpd);
+	if (pm_runtime_suspended(dev)) {
+		dev_gpd_data(dev)->rpm_pstate = state;
+	} else {
+		ret = genpd_set_performance_state(dev, state);
+		if (!ret)
+			dev_gpd_data(dev)->rpm_pstate = 0;
+	}
+	genpd_unlock(genpd);
+
+	return ret;
+}
+
 /**
  * dev_pm_genpd_set_performance_state- Set performance state of device's power
  * domain.
@@ -437,7 +456,6 @@ static void genpd_restore_performance_state(struct device *dev,
 int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 {
 	struct generic_pm_domain *genpd;
-	int ret = 0;
 
 	genpd = dev_to_genpd_safe(dev);
 	if (!genpd)
@@ -447,17 +465,7 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 		     !dev->power.subsys_data->domain_data))
 		return -EINVAL;
 
-	genpd_lock(genpd);
-	if (pm_runtime_suspended(dev)) {
-		dev_gpd_data(dev)->rpm_pstate = state;
-	} else {
-		ret = genpd_set_performance_state(dev, state);
-		if (!ret)
-			dev_gpd_data(dev)->rpm_pstate = 0;
-	}
-	genpd_unlock(genpd);
-
-	return ret;
+	return genpd_dev_pm_set_performance_state(dev, state);
 }
 EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
 
@@ -2079,6 +2087,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	genpd->domain.ops.restore_noirq = genpd_restore_noirq;
 	genpd->domain.ops.complete = genpd_complete;
 	genpd->domain.start = genpd_dev_pm_start;
+	genpd->domain.set_performance_state = genpd_dev_pm_set_performance_state;
 
 	if (genpd->flags & GENPD_FLAG_PM_CLK) {
 		genpd->dev_ops.stop = pm_clk_suspend;

drivers/cpufreq/Kconfig.arm

@@ -90,7 +90,7 @@ config ARM_VEXPRESS_SPC_CPUFREQ
 
 config ARM_BRCMSTB_AVS_CPUFREQ
 	tristate "Broadcom STB AVS CPUfreq driver"
-	depends on ARCH_BRCMSTB || COMPILE_TEST
+	depends on (ARCH_BRCMSTB && !ARM_SCMI_CPUFREQ) || COMPILE_TEST
 	default y
 	help
 	  Some Broadcom STB SoCs use a co-processor running proprietary firmware
@@ -124,8 +124,8 @@ config ARM_IMX_CPUFREQ_DT
 	tristate "Freescale i.MX8M cpufreq support"
 	depends on ARCH_MXC && CPUFREQ_DT
 	help
-	  This adds cpufreq driver support for Freescale i.MX8M series SoCs,
-	  based on cpufreq-dt.
+	  This adds cpufreq driver support for Freescale i.MX7/i.MX8M
+	  series SoCs, based on cpufreq-dt.
 
 	  If in doubt, say N.
 

drivers/cpufreq/cpufreq-dt-platdev.c

@@ -142,9 +142,11 @@ static const struct of_device_id blocklist[] __initconst = {
 	{ .compatible = "nvidia,tegra234", },
 
 	{ .compatible = "qcom,apq8096", },
+	{ .compatible = "qcom,msm8909", },
 	{ .compatible = "qcom,msm8996", },
 	{ .compatible = "qcom,msm8998", },
 	{ .compatible = "qcom,qcm2290", },
+	{ .compatible = "qcom,qcm6490", },
 	{ .compatible = "qcom,qcs404", },
 	{ .compatible = "qcom,qdu1000", },
 	{ .compatible = "qcom,sa8155p" },
@@ -176,7 +178,9 @@ static const struct of_device_id blocklist[] __initconst = {
 	{ .compatible = "ti,omap3", },
 	{ .compatible = "ti,am625", },
 	{ .compatible = "ti,am62a7", },
+	{ .compatible = "ti,am62p5", },
 
+	{ .compatible = "qcom,ipq6018", },
 	{ .compatible = "qcom,ipq8064", },
 	{ .compatible = "qcom,apq8064", },
 	{ .compatible = "qcom,msm8974", },

drivers/cpufreq/cpufreq.c

@@ -1544,7 +1544,7 @@ static int cpufreq_online(unsigned int cpu)
 
 		/*
 		 * Register with the energy model before
-		 * sched_cpufreq_governor_change() is called, which will result
+		 * sugov_eas_rebuild_sd() is called, which will result
 		 * in rebuilding of the sched domains, which should only be done
 		 * once the energy model is properly initialized for the policy
 		 * first.
@@ -2652,7 +2652,6 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
 		ret = cpufreq_start_governor(policy);
 		if (!ret) {
 			pr_debug("governor change\n");
-			sched_cpufreq_governor_change(policy, old_gov);
 			return 0;
 		}
 		cpufreq_exit_governor(policy);

drivers/cpufreq/cpufreq_conservative.c

@@ -187,8 +187,7 @@ static ssize_t down_threshold_store(struct gov_attr_set *attr_set,
 	ret = sscanf(buf, "%u", &input);
 
 	/* cannot be lower than 1 otherwise freq will not fall */
-	if (ret != 1 || input < 1 || input > 100 ||
-			input >= dbs_data->up_threshold)
+	if (ret != 1 || input < 1 || input >= dbs_data->up_threshold)
 		return -EINVAL;
 
 	cs_tuners->down_threshold = input;

drivers/cpufreq/cpufreq_stats.c

@@ -131,23 +131,23 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
 	len += sysfs_emit_at(buf, len, "   From  :    To\n");
 	len += sysfs_emit_at(buf, len, "         : ");
 	for (i = 0; i < stats->state_num; i++) {
-		if (len >= PAGE_SIZE)
+		if (len >= PAGE_SIZE - 1)
 			break;
 		len += sysfs_emit_at(buf, len, "%9u ", stats->freq_table[i]);
 	}
-	if (len >= PAGE_SIZE)
-		return PAGE_SIZE;
+	if (len >= PAGE_SIZE - 1)
+		return PAGE_SIZE - 1;
 
 	len += sysfs_emit_at(buf, len, "\n");
 
 	for (i = 0; i < stats->state_num; i++) {
-		if (len >= PAGE_SIZE)
+		if (len >= PAGE_SIZE - 1)
 			break;
 
 		len += sysfs_emit_at(buf, len, "%9u: ", stats->freq_table[i]);
 
 		for (j = 0; j < stats->state_num; j++) {
-			if (len >= PAGE_SIZE)
+			if (len >= PAGE_SIZE - 1)
 				break;
 
 			if (pending)
@@ -157,12 +157,12 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
 
 			len += sysfs_emit_at(buf, len, "%9u ", count);
 		}
-		if (len >= PAGE_SIZE)
+		if (len >= PAGE_SIZE - 1)
 			break;
 		len += sysfs_emit_at(buf, len, "\n");
 	}
 
-	if (len >= PAGE_SIZE) {
+	if (len >= PAGE_SIZE - 1) {
 		pr_warn_once("cpufreq transition table exceeds PAGE_SIZE. Disabling\n");
 		return -EFBIG;
 	}

drivers/cpufreq/cpufreq_userspace.c

@@ -15,8 +15,11 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 
-static DEFINE_PER_CPU(unsigned int, cpu_is_managed);
-static DEFINE_MUTEX(userspace_mutex);
+struct userspace_policy {
+	unsigned int is_managed;
+	unsigned int setspeed;
+	struct mutex mutex;
+};
 
 /**
  * cpufreq_set - set the CPU frequency
@@ -28,19 +31,19 @@ static DEFINE_MUTEX(userspace_mutex);
 static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq)
 {
 	int ret = -EINVAL;
-	unsigned int *setspeed = policy->governor_data;
+	struct userspace_policy *userspace = policy->governor_data;
 
 	pr_debug("cpufreq_set for cpu %u, freq %u kHz\n", policy->cpu, freq);
 
-	mutex_lock(&userspace_mutex);
-	if (!per_cpu(cpu_is_managed, policy->cpu))
+	mutex_lock(&userspace->mutex);
+	if (!userspace->is_managed)
 		goto err;
 
-	*setspeed = freq;
+	userspace->setspeed = freq;
 
 	ret = __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L);
  err:
-	mutex_unlock(&userspace_mutex);
+	mutex_unlock(&userspace->mutex);
 	return ret;
 }
 
@@ -51,67 +54,74 @@ static ssize_t show_speed(struct cpufreq_policy *policy, char *buf)
 
 static int cpufreq_userspace_policy_init(struct cpufreq_policy *policy)
 {
-	unsigned int *setspeed;
+	struct userspace_policy *userspace;
 
-	setspeed = kzalloc(sizeof(*setspeed), GFP_KERNEL);
-	if (!setspeed)
+	userspace = kzalloc(sizeof(*userspace), GFP_KERNEL);
+	if (!userspace)
 		return -ENOMEM;
 
-	policy->governor_data = setspeed;
+	mutex_init(&userspace->mutex);
+
+	policy->governor_data = userspace;
 	return 0;
 }
 
+/*
+ * Any routine that writes to the policy struct will hold the "rwsem" of
+ * policy struct that means it is free to free "governor_data" here.
+ */
 static void cpufreq_userspace_policy_exit(struct cpufreq_policy *policy)
 {
-	mutex_lock(&userspace_mutex);
 	kfree(policy->governor_data);
 	policy->governor_data = NULL;
-	mutex_unlock(&userspace_mutex);
 }
 
 static int cpufreq_userspace_policy_start(struct cpufreq_policy *policy)
 {
-	unsigned int *setspeed = policy->governor_data;
+	struct userspace_policy *userspace = policy->governor_data;
 
 	BUG_ON(!policy->cur);
 	pr_debug("started managing cpu %u\n", policy->cpu);
 
-	mutex_lock(&userspace_mutex);
-	per_cpu(cpu_is_managed, policy->cpu) = 1;
-	*setspeed = policy->cur;
-	mutex_unlock(&userspace_mutex);
+	mutex_lock(&userspace->mutex);
+	userspace->is_managed = 1;
+	userspace->setspeed = policy->cur;
+	mutex_unlock(&userspace->mutex);
 	return 0;
 }
 
 static void cpufreq_userspace_policy_stop(struct cpufreq_policy *policy)
 {
-	unsigned int *setspeed = policy->governor_data;
+	struct userspace_policy *userspace = policy->governor_data;
 
 	pr_debug("managing cpu %u stopped\n", policy->cpu);
 
-	mutex_lock(&userspace_mutex);
-	per_cpu(cpu_is_managed, policy->cpu) = 0;
-	*setspeed = 0;
-	mutex_unlock(&userspace_mutex);
+	mutex_lock(&userspace->mutex);
+	userspace->is_managed = 0;
+	userspace->setspeed = 0;
+	mutex_unlock(&userspace->mutex);
 }
 
 static void cpufreq_userspace_policy_limits(struct cpufreq_policy *policy)
 {
-	unsigned int *setspeed = policy->governor_data;
+	struct userspace_policy *userspace = policy->governor_data;
 
-	mutex_lock(&userspace_mutex);
+	mutex_lock(&userspace->mutex);
 
 	pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",
-		 policy->cpu, policy->min, policy->max, policy->cur, *setspeed);
+		 policy->cpu, policy->min, policy->max, policy->cur, userspace->setspeed);
 
-	if (policy->max < *setspeed)
-		__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
-	else if (policy->min > *setspeed)
-		__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
+	if (policy->max < userspace->setspeed)
+		__cpufreq_driver_target(policy, policy->max,
+					CPUFREQ_RELATION_H);
+	else if (policy->min > userspace->setspeed)
+		__cpufreq_driver_target(policy, policy->min,
+					CPUFREQ_RELATION_L);
 	else
-		__cpufreq_driver_target(policy, *setspeed, CPUFREQ_RELATION_L);
+		__cpufreq_driver_target(policy, userspace->setspeed,
+					CPUFREQ_RELATION_L);
 
-	mutex_unlock(&userspace_mutex);
+	mutex_unlock(&userspace->mutex);
 }
 
 static struct cpufreq_governor cpufreq_gov_userspace = {

drivers/cpufreq/intel_pstate.c

@@ -571,13 +571,9 @@ static void intel_pstate_hybrid_hwp_adjust(struct cpudata *cpu)
 static inline void update_turbo_state(void)
 {
 	u64 misc_en;
-	struct cpudata *cpu;
 
-	cpu = all_cpu_data[0];
 	rdmsrl(MSR_IA32_MISC_ENABLE, misc_en);
-	global.turbo_disabled =
-		(misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ||
-		 cpu->pstate.max_pstate == cpu->pstate.turbo_pstate);
+	global.turbo_disabled = misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE;
 }
 
 static int min_perf_pct_min(void)

drivers/cpufreq/pmac32-cpufreq.c

@@ -24,6 +24,7 @@
 #include <linux/device.h>
 #include <linux/hardirq.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/machdep.h>
 #include <asm/irq.h>
@@ -378,10 +379,9 @@ static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
 static u32 read_gpio(struct device_node *np)
 {
-	const u32 *reg = of_get_property(np, "reg", NULL);
-	u32 offset;
+	u64 offset;
 
-	if (reg == NULL)
+	if (of_property_read_reg(np, 0, &offset, NULL) < 0)
 		return 0;
 	/* That works for all keylargos but shall be fixed properly
 	 * some day... The problem is that it seems we can't rely
@@ -389,7 +389,6 @@ static u32 read_gpio(struct device_node *np)
 	 * relative to the base of KeyLargo or to the base of the
 	 * GPIO space, and the device-tree doesn't help.
 	 */
-	offset = *reg;
 	if (offset < KEYLARGO_GPIO_LEVELS0)
 		offset += KEYLARGO_GPIO_LEVELS0;
 	return offset;

drivers/cpufreq/qcom-cpufreq-nvmem.c

@@ -30,6 +30,14 @@
 
 #include <dt-bindings/arm/qcom,ids.h>
 
+enum ipq806x_versions {
+	IPQ8062_VERSION = 0,
+	IPQ8064_VERSION,
+	IPQ8065_VERSION,
+};
+
+#define IPQ6000_VERSION	BIT(2)
+
 struct qcom_cpufreq_drv;
 
 struct qcom_cpufreq_match_data {
@@ -40,16 +48,38 @@ struct qcom_cpufreq_match_data {
 	const char **genpd_names;
 };
 
+struct qcom_cpufreq_drv_cpu {
+	int opp_token;
+};
+
 struct qcom_cpufreq_drv {
-	int *opp_tokens;
 	u32 versions;
 	const struct qcom_cpufreq_match_data *data;
+	struct qcom_cpufreq_drv_cpu cpus[];
 };
 
 static struct platform_device *cpufreq_dt_pdev, *cpufreq_pdev;
 
+static int qcom_cpufreq_simple_get_version(struct device *cpu_dev,
+					   struct nvmem_cell *speedbin_nvmem,
+					   char **pvs_name,
+					   struct qcom_cpufreq_drv *drv)
+{
+	u8 *speedbin;
+
+	*pvs_name = NULL;
+	speedbin = nvmem_cell_read(speedbin_nvmem, NULL);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	dev_dbg(cpu_dev, "speedbin: %d\n", *speedbin);
+	drv->versions = 1 << *speedbin;
+	kfree(speedbin);
+	return 0;
+}
+
 static void get_krait_bin_format_a(struct device *cpu_dev,
-					  int *speed, int *pvs, int *pvs_ver,
+					  int *speed, int *pvs,
 					  u8 *buf)
 {
 	u32 pte_efuse;
@@ -180,8 +210,7 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
 
 	switch (len) {
 	case 4:
-		get_krait_bin_format_a(cpu_dev, &speed, &pvs, &pvs_ver,
-				       speedbin);
+		get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin);
 		break;
 	case 8:
 		get_krait_bin_format_b(cpu_dev, &speed, &pvs, &pvs_ver,
@@ -203,6 +232,114 @@ len_error:
 	return ret;
 }
 
+static int qcom_cpufreq_ipq8064_name_version(struct device *cpu_dev,
+					     struct nvmem_cell *speedbin_nvmem,
+					     char **pvs_name,
+					     struct qcom_cpufreq_drv *drv)
+{
+	int speed = 0, pvs = 0;
+	int msm_id, ret = 0;
+	u8 *speedbin;
+	size_t len;
+
+	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	if (len != 4) {
+		dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
+		ret = -ENODEV;
+		goto exit;
+	}
+
+	get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin);
+
+	ret = qcom_smem_get_soc_id(&msm_id);
+	if (ret)
+		goto exit;
+
+	switch (msm_id) {
+	case QCOM_ID_IPQ8062:
+		drv->versions = BIT(IPQ8062_VERSION);
+		break;
+	case QCOM_ID_IPQ8064:
+	case QCOM_ID_IPQ8066:
+	case QCOM_ID_IPQ8068:
+		drv->versions = BIT(IPQ8064_VERSION);
+		break;
+	case QCOM_ID_IPQ8065:
+	case QCOM_ID_IPQ8069:
+		drv->versions = BIT(IPQ8065_VERSION);
+		break;
+	default:
+		dev_err(cpu_dev,
+			"SoC ID %u is not part of IPQ8064 family, limiting to 1.0GHz!\n",
+			msm_id);
+		drv->versions = BIT(IPQ8062_VERSION);
+		break;
+	}
+
+	/* IPQ8064 speed is never fused. Only pvs values are fused. */
+	snprintf(*pvs_name, sizeof("speed0-pvsXX"), "speed0-pvs%d", pvs);
+
+exit:
+	kfree(speedbin);
+	return ret;
+}
+
+static int qcom_cpufreq_ipq6018_name_version(struct device *cpu_dev,
+					     struct nvmem_cell *speedbin_nvmem,
+					     char **pvs_name,
+					     struct qcom_cpufreq_drv *drv)
+{
+	u32 msm_id;
+	int ret;
+	u8 *speedbin;
+	*pvs_name = NULL;
+
+	ret = qcom_smem_get_soc_id(&msm_id);
+	if (ret)
+		return ret;
+
+	speedbin = nvmem_cell_read(speedbin_nvmem, NULL);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	switch (msm_id) {
+	case QCOM_ID_IPQ6005:
+	case QCOM_ID_IPQ6010:
+	case QCOM_ID_IPQ6018:
+	case QCOM_ID_IPQ6028:
+		/* Fuse Value    Freq    BIT to set
+		 * ---------------------------------
+		 *   2’b0     No Limit     BIT(0)
+		 *   2’b1     1.5 GHz      BIT(1)
+		 */
+		drv->versions = 1 << (unsigned int)(*speedbin);
+		break;
+	case QCOM_ID_IPQ6000:
+		/*
+		 * IPQ6018 family only has one bit to advertise the CPU
+		 * speed-bin, but that is not enough for IPQ6000 which
+		 * is only rated up to 1.2GHz.
+		 * So for IPQ6000 manually set BIT(2) based on SMEM ID.
+		 */
+		drv->versions = IPQ6000_VERSION;
+		break;
+	default:
+		dev_err(cpu_dev,
+			"SoC ID %u is not part of IPQ6018 family, limiting to 1.2GHz!\n",
+			msm_id);
+		drv->versions = IPQ6000_VERSION;
+		break;
+	}
+
+	kfree(speedbin);
+	return 0;
+}
+
+static const char *generic_genpd_names[] = { "perf", NULL };
+
 static const struct qcom_cpufreq_match_data match_data_kryo = {
 	.get_version = qcom_cpufreq_kryo_name_version,
 };
@@ -211,12 +348,25 @@ static const struct qcom_cpufreq_match_data match_data_krait = {
 	.get_version = qcom_cpufreq_krait_name_version,
 };
 
+static const struct qcom_cpufreq_match_data match_data_msm8909 = {
+	.get_version = qcom_cpufreq_simple_get_version,
+	.genpd_names = generic_genpd_names,
+};
+
 static const char *qcs404_genpd_names[] = { "cpr", NULL };
 
 static const struct qcom_cpufreq_match_data match_data_qcs404 = {
 	.genpd_names = qcs404_genpd_names,
 };
 
+static const struct qcom_cpufreq_match_data match_data_ipq6018 = {
+	.get_version = qcom_cpufreq_ipq6018_name_version,
+};
+
+static const struct qcom_cpufreq_match_data match_data_ipq8064 = {
+	.get_version = qcom_cpufreq_ipq8064_name_version,
+};
+
 static int qcom_cpufreq_probe(struct platform_device *pdev)
 {
 	struct qcom_cpufreq_drv *drv;
@@ -237,48 +387,39 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
 	if (!np)
 		return -ENOENT;
 
-	ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");
+	ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu") ||
+	      of_device_is_compatible(np, "operating-points-v2-krait-cpu");
 	if (!ret) {
 		of_node_put(np);
 		return -ENOENT;
 	}
 
-	drv = kzalloc(sizeof(*drv), GFP_KERNEL);
+	drv = devm_kzalloc(&pdev->dev, struct_size(drv, cpus, num_possible_cpus()),
+		           GFP_KERNEL);
 	if (!drv)
 		return -ENOMEM;
 
 	match = pdev->dev.platform_data;
 	drv->data = match->data;
-	if (!drv->data) {
-		ret = -ENODEV;
-		goto free_drv;
-	}
+	if (!drv->data)
+		return -ENODEV;
 
 	if (drv->data->get_version) {
 		speedbin_nvmem = of_nvmem_cell_get(np, NULL);
-		if (IS_ERR(speedbin_nvmem)) {
-			ret = dev_err_probe(cpu_dev, PTR_ERR(speedbin_nvmem),
-					    "Could not get nvmem cell\n");
-			goto free_drv;
-		}
+		if (IS_ERR(speedbin_nvmem))
+			return dev_err_probe(cpu_dev, PTR_ERR(speedbin_nvmem),
+					     "Could not get nvmem cell\n");
 
 		ret = drv->data->get_version(cpu_dev,
 							speedbin_nvmem, &pvs_name, drv);
 		if (ret) {
 			nvmem_cell_put(speedbin_nvmem);
-			goto free_drv;
+			return ret;
 		}
 		nvmem_cell_put(speedbin_nvmem);
 	}
 	of_node_put(np);
 
-	drv->opp_tokens = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tokens),
-				  GFP_KERNEL);
-	if (!drv->opp_tokens) {
-		ret = -ENOMEM;
-		goto free_drv;
-	}
-
 	for_each_possible_cpu(cpu) {
 		struct dev_pm_opp_config config = {
 			.supported_hw = NULL,
@@ -304,9 +445,9 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
 		}
 
 		if (config.supported_hw || config.genpd_names) {
-			drv->opp_tokens[cpu] = dev_pm_opp_set_config(cpu_dev, &config);
-			if (drv->opp_tokens[cpu] < 0) {
-				ret = drv->opp_tokens[cpu];
+			drv->cpus[cpu].opp_token = dev_pm_opp_set_config(cpu_dev, &config);
+			if (drv->cpus[cpu].opp_token < 0) {
+				ret = drv->cpus[cpu].opp_token;
 				dev_err(cpu_dev, "Failed to set OPP config\n");
 				goto free_opp;
 			}
@@ -325,11 +466,7 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
 
 free_opp:
 	for_each_possible_cpu(cpu)
-		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);
-	kfree(drv->opp_tokens);
-free_drv:
-	kfree(drv);
-
+		dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);
 	return ret;
 }
 
@@ -341,10 +478,7 @@ static void qcom_cpufreq_remove(struct platform_device *pdev)
 	platform_device_unregister(cpufreq_dt_pdev);
 
 	for_each_possible_cpu(cpu)
-		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);
-
-	kfree(drv->opp_tokens);
-	kfree(drv);
+		dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);
 }
 
 static struct platform_driver qcom_cpufreq_driver = {
@@ -357,9 +491,11 @@ static struct platform_driver qcom_cpufreq_driver = {
 
 static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
 	{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
+	{ .compatible = "qcom,msm8909", .data = &match_data_msm8909 },
 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
-	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
+	{ .compatible = "qcom,ipq6018", .data = &match_data_ipq6018 },
+	{ .compatible = "qcom,ipq8064", .data = &match_data_ipq8064 },
 	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8960", .data = &match_data_krait },

drivers/cpufreq/tegra194-cpufreq.c

@@ -5,7 +5,6 @@
 
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
-#include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -21,10 +20,11 @@
 
 #define KHZ                     1000
 #define REF_CLK_MHZ             408 /* 408 MHz */
-#define US_DELAY                500
 #define CPUFREQ_TBL_STEP_HZ     (50 * KHZ * KHZ)
 #define MAX_CNT                 ~0U
 
+#define MAX_DELTA_KHZ          115200
+
 #define NDIV_MASK              0x1FF
 
 #define CORE_OFFSET(cpu)			(cpu * 8)
@@ -39,6 +39,12 @@
 /* cpufreq transisition latency */
 #define TEGRA_CPUFREQ_TRANSITION_LATENCY (300 * 1000) /* unit in nanoseconds */
 
+struct tegra_cpu_data {
+	u32 cpuid;
+	u32 clusterid;
+	void __iomem *freq_core_reg;
+};
+
 struct tegra_cpu_ctr {
 	u32 cpu;
 	u32 coreclk_cnt, last_coreclk_cnt;
@@ -62,6 +68,7 @@ struct tegra_cpufreq_soc {
 	int maxcpus_per_cluster;
 	unsigned int num_clusters;
 	phys_addr_t actmon_cntr_base;
+	u32 refclk_delta_min;
 };
 
 struct tegra194_cpufreq_data {
@@ -69,6 +76,7 @@ struct tegra194_cpufreq_data {
 	struct cpufreq_frequency_table **bpmp_luts;
 	const struct tegra_cpufreq_soc *soc;
 	bool icc_dram_bw_scaling;
+	struct tegra_cpu_data *cpu_data;
 };
 
 static struct workqueue_struct *read_counters_wq;
@@ -116,14 +124,8 @@ static void tegra234_get_cpu_cluster_id(u32 cpu, u32 *cpuid, u32 *clusterid)
 static int tegra234_get_cpu_ndiv(u32 cpu, u32 cpuid, u32 clusterid, u64 *ndiv)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
-	void __iomem *freq_core_reg;
-	u64 mpidr_id;
 
-	/* use physical id to get address of per core frequency register */
-	mpidr_id = (clusterid * data->soc->maxcpus_per_cluster) + cpuid;
-	freq_core_reg = SCRATCH_FREQ_CORE_REG(data, mpidr_id);
-
-	*ndiv = readl(freq_core_reg) & NDIV_MASK;
+	*ndiv = readl(data->cpu_data[cpu].freq_core_reg) & NDIV_MASK;
 
 	return 0;
 }
@@ -131,19 +133,10 @@ static int tegra234_get_cpu_ndiv(u32 cpu, u32 cpuid, u32 clusterid, u64 *ndiv)
 static void tegra234_set_cpu_ndiv(struct cpufreq_policy *policy, u64 ndiv)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
-	void __iomem *freq_core_reg;
-	u32 cpu, cpuid, clusterid;
-	u64 mpidr_id;
+	u32 cpu;
 
-	for_each_cpu_and(cpu, policy->cpus, cpu_online_mask) {
-		data->soc->ops->get_cpu_cluster_id(cpu, &cpuid, &clusterid);
-
-		/* use physical id to get address of per core frequency register */
-		mpidr_id = (clusterid * data->soc->maxcpus_per_cluster) + cpuid;
-		freq_core_reg = SCRATCH_FREQ_CORE_REG(data, mpidr_id);
-
-		writel(ndiv, freq_core_reg);
-	}
+	for_each_cpu(cpu, policy->cpus)
+		writel(ndiv, data->cpu_data[cpu].freq_core_reg);
 }
 
 /*
@@ -157,19 +150,35 @@ static void tegra234_read_counters(struct tegra_cpu_ctr *c)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
 	void __iomem *actmon_reg;
-	u32 cpuid, clusterid;
+	u32 delta_refcnt;
+	int cnt = 0;
 	u64 val;
 
-	data->soc->ops->get_cpu_cluster_id(c->cpu, &cpuid, &clusterid);
-	actmon_reg = CORE_ACTMON_CNTR_REG(data, clusterid, cpuid);
+	actmon_reg = CORE_ACTMON_CNTR_REG(data, data->cpu_data[c->cpu].clusterid,
+					  data->cpu_data[c->cpu].cpuid);
 
 	val = readq(actmon_reg);
 	c->last_refclk_cnt = upper_32_bits(val);
 	c->last_coreclk_cnt = lower_32_bits(val);
-	udelay(US_DELAY);
-	val = readq(actmon_reg);
-	c->refclk_cnt = upper_32_bits(val);
-	c->coreclk_cnt = lower_32_bits(val);
+
+	/*
+	 * The sampling window is based on the minimum number of reference
+	 * clock cycles which is known to give a stable value of CPU frequency.
+	 */
+	do {
+		val = readq(actmon_reg);
+		c->refclk_cnt = upper_32_bits(val);
+		c->coreclk_cnt = lower_32_bits(val);
+		if (c->refclk_cnt < c->last_refclk_cnt)
+			delta_refcnt = c->refclk_cnt + (MAX_CNT - c->last_refclk_cnt);
+		else
+			delta_refcnt = c->refclk_cnt - c->last_refclk_cnt;
+		if (++cnt >= 0xFFFF) {
+			pr_warn("cpufreq: problem with refclk on cpu:%d, delta_refcnt:%u, cnt:%d\n",
+				c->cpu, delta_refcnt, cnt);
+			break;
+		}
+	} while (delta_refcnt < data->soc->refclk_delta_min);
 }
 
 static struct tegra_cpufreq_ops tegra234_cpufreq_ops = {
@@ -184,6 +193,7 @@ static const struct tegra_cpufreq_soc tegra234_cpufreq_soc = {
 	.actmon_cntr_base = 0x9000,
 	.maxcpus_per_cluster = 4,
 	.num_clusters = 3,
+	.refclk_delta_min = 16000,
 };
 
 static const struct tegra_cpufreq_soc tegra239_cpufreq_soc = {
@@ -191,6 +201,7 @@ static const struct tegra_cpufreq_soc tegra239_cpufreq_soc = {
 	.actmon_cntr_base = 0x4000,
 	.maxcpus_per_cluster = 8,
 	.num_clusters = 1,
+	.refclk_delta_min = 16000,
 };
 
 static void tegra194_get_cpu_cluster_id(u32 cpu, u32 *cpuid, u32 *clusterid)
@@ -231,15 +242,33 @@ static inline u32 map_ndiv_to_freq(struct mrq_cpu_ndiv_limits_response
 
 static void tegra194_read_counters(struct tegra_cpu_ctr *c)
 {
+	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+	u32 delta_refcnt;
+	int cnt = 0;
 	u64 val;
 
 	val = read_freq_feedback();
 	c->last_refclk_cnt = lower_32_bits(val);
 	c->last_coreclk_cnt = upper_32_bits(val);
-	udelay(US_DELAY);
-	val = read_freq_feedback();
-	c->refclk_cnt = lower_32_bits(val);
-	c->coreclk_cnt = upper_32_bits(val);
+
+	/*
+	 * The sampling window is based on the minimum number of reference
+	 * clock cycles which is known to give a stable value of CPU frequency.
+	 */
+	do {
+		val = read_freq_feedback();
+		c->refclk_cnt = lower_32_bits(val);
+		c->coreclk_cnt = upper_32_bits(val);
+		if (c->refclk_cnt < c->last_refclk_cnt)
+			delta_refcnt = c->refclk_cnt + (MAX_CNT - c->last_refclk_cnt);
+		else
+			delta_refcnt = c->refclk_cnt - c->last_refclk_cnt;
+		if (++cnt >= 0xFFFF) {
+			pr_warn("cpufreq: problem with refclk on cpu:%d, delta_refcnt:%u, cnt:%d\n",
+				c->cpu, delta_refcnt, cnt);
+			break;
+		}
+	} while (delta_refcnt < data->soc->refclk_delta_min);
 }
 
 static void tegra_read_counters(struct work_struct *work)
@@ -297,9 +326,8 @@ static unsigned int tegra194_calculate_speed(u32 cpu)
 	u32 rate_mhz;
 
 	/*
-	 * udelay() is required to reconstruct cpu frequency over an
-	 * observation window. Using workqueue to call udelay() with
-	 * interrupts enabled.
+	 * Reconstruct cpu frequency over an observation/sampling window.
+	 * Using workqueue to keep interrupts enabled during the interval.
 	 */
 	read_counters_work.c.cpu = cpu;
 	INIT_WORK_ONSTACK(&read_counters_work.work, tegra_read_counters);
@@ -357,19 +385,17 @@ static void tegra194_set_cpu_ndiv(struct cpufreq_policy *policy, u64 ndiv)
 static unsigned int tegra194_get_speed(u32 cpu)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+	u32 clusterid = data->cpu_data[cpu].clusterid;
 	struct cpufreq_frequency_table *pos;
-	u32 cpuid, clusterid;
 	unsigned int rate;
 	u64 ndiv;
 	int ret;
 
-	data->soc->ops->get_cpu_cluster_id(cpu, &cpuid, &clusterid);
-
 	/* reconstruct actual cpu freq using counters */
 	rate = tegra194_calculate_speed(cpu);
 
 	/* get last written ndiv value */
-	ret = data->soc->ops->get_cpu_ndiv(cpu, cpuid, clusterid, &ndiv);
+	ret = data->soc->ops->get_cpu_ndiv(cpu, data->cpu_data[cpu].cpuid, clusterid, &ndiv);
 	if (WARN_ON_ONCE(ret))
 		return rate;
 
@@ -383,9 +409,9 @@ static unsigned int tegra194_get_speed(u32 cpu)
 		if (pos->driver_data != ndiv)
 			continue;
 
-		if (abs(pos->frequency - rate) > 115200) {
-			pr_warn("cpufreq: cpu%d,cur:%u,set:%u,set ndiv:%llu\n",
-				cpu, rate, pos->frequency, ndiv);
+		if (abs(pos->frequency - rate) > MAX_DELTA_KHZ) {
+			pr_warn("cpufreq: cpu%d,cur:%u,set:%u,delta:%d,set ndiv:%llu\n",
+				cpu, rate, pos->frequency, abs(rate - pos->frequency), ndiv);
 		} else {
 			rate = pos->frequency;
 		}
@@ -450,6 +476,8 @@ static int tegra_cpufreq_init_cpufreq_table(struct cpufreq_policy *policy,
 		if (IS_ERR(opp))
 			continue;
 
+		dev_pm_opp_put(opp);
+
 		ret = dev_pm_opp_enable(cpu_dev, pos->frequency * KHZ);
 		if (ret < 0)
 			return ret;
@@ -473,13 +501,12 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
 	int maxcpus_per_cluster = data->soc->maxcpus_per_cluster;
+	u32 clusterid = data->cpu_data[policy->cpu].clusterid;
 	struct cpufreq_frequency_table *freq_table;
 	struct cpufreq_frequency_table *bpmp_lut;
 	u32 start_cpu, cpu;
-	u32 clusterid;
 	int ret;
 
-	data->soc->ops->get_cpu_cluster_id(policy->cpu, NULL, &clusterid);
 	if (clusterid >= data->soc->num_clusters || !data->bpmp_luts[clusterid])
 		return -EINVAL;
 
@@ -578,6 +605,7 @@ static const struct tegra_cpufreq_soc tegra194_cpufreq_soc = {
 	.ops = &tegra194_cpufreq_ops,
 	.maxcpus_per_cluster = 2,
 	.num_clusters = 4,
+	.refclk_delta_min = 16000,
 };
 
 static void tegra194_cpufreq_free_resources(void)
@@ -657,6 +685,28 @@ tegra_cpufreq_bpmp_read_lut(struct platform_device *pdev, struct tegra_bpmp *bpm
 	return freq_table;
 }
 
+static int tegra194_cpufreq_store_physids(unsigned int cpu, struct tegra194_cpufreq_data *data)
+{
+	int num_cpus = data->soc->maxcpus_per_cluster * data->soc->num_clusters;
+	u32 cpuid, clusterid;
+	u64 mpidr_id;
+
+	if (cpu > (num_cpus - 1)) {
+		pr_err("cpufreq: wrong num of cpus or clusters in soc data\n");
+		return -EINVAL;
+	}
+
+	data->soc->ops->get_cpu_cluster_id(cpu, &cpuid, &clusterid);
+
+	mpidr_id = (clusterid * data->soc->maxcpus_per_cluster) + cpuid;
+
+	data->cpu_data[cpu].cpuid = cpuid;
+	data->cpu_data[cpu].clusterid = clusterid;
+	data->cpu_data[cpu].freq_core_reg = SCRATCH_FREQ_CORE_REG(data, mpidr_id);
+
+	return 0;
+}
+
 static int tegra194_cpufreq_probe(struct platform_device *pdev)
 {
 	const struct tegra_cpufreq_soc *soc;
@@ -664,6 +714,7 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 	struct tegra_bpmp *bpmp;
 	struct device *cpu_dev;
 	int err, i;
+	u32 cpu;
 
 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
@@ -671,7 +722,7 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 
 	soc = of_device_get_match_data(&pdev->dev);
 
-	if (soc->ops && soc->maxcpus_per_cluster && soc->num_clusters) {
+	if (soc->ops && soc->maxcpus_per_cluster && soc->num_clusters && soc->refclk_delta_min) {
 		data->soc = soc;
 	} else {
 		dev_err(&pdev->dev, "soc data missing\n");
@@ -690,6 +741,12 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 			return PTR_ERR(data->regs);
 	}
 
+	data->cpu_data = devm_kcalloc(&pdev->dev, data->soc->num_clusters *
+				      data->soc->maxcpus_per_cluster,
+				      sizeof(*data->cpu_data), GFP_KERNEL);
+	if (!data->cpu_data)
+		return -ENOMEM;
+
 	platform_set_drvdata(pdev, data);
 
 	bpmp = tegra_bpmp_get(&pdev->dev);
@@ -711,6 +768,12 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 		}
 	}
 
+	for_each_possible_cpu(cpu) {
+		err = tegra194_cpufreq_store_physids(cpu, data);
+		if (err)
+			goto err_free_res;
+	}
+
 	tegra194_cpufreq_driver.driver_data = data;
 
 	/* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */

drivers/cpufreq/ti-cpufreq.c

@@ -338,6 +338,7 @@ static const struct of_device_id ti_cpufreq_of_match[] = {
 	{ .compatible = "ti,omap36xx", .data = &omap36xx_soc_data, },
 	{ .compatible = "ti,am625", .data = &am625_soc_data, },
 	{ .compatible = "ti,am62a7", .data = &am625_soc_data, },
+	{ .compatible = "ti,am62p5", .data = &am625_soc_data, },
 	/* legacy */
 	{ .compatible = "ti,omap3430", .data = &omap34xx_soc_data, },
 	{ .compatible = "ti,omap3630", .data = &omap36xx_soc_data, },

drivers/devfreq/devfreq.c

@@ -88,7 +88,7 @@ static unsigned long find_available_min_freq(struct devfreq *devfreq)
 	struct dev_pm_opp *opp;
 	unsigned long min_freq = 0;
 
-	opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &min_freq);
+	opp = dev_pm_opp_find_freq_ceil_indexed(devfreq->dev.parent, &min_freq, 0);
 	if (IS_ERR(opp))
 		min_freq = 0;
 	else
@@ -102,7 +102,7 @@ static unsigned long find_available_max_freq(struct devfreq *devfreq)
 	struct dev_pm_opp *opp;
 	unsigned long max_freq = ULONG_MAX;
 
-	opp = dev_pm_opp_find_freq_floor(devfreq->dev.parent, &max_freq);
+	opp = dev_pm_opp_find_freq_floor_indexed(devfreq->dev.parent, &max_freq, 0);
 	if (IS_ERR(opp))
 		max_freq = 0;
 	else
@@ -196,7 +196,7 @@ static int set_freq_table(struct devfreq *devfreq)
 		return -ENOMEM;
 
 	for (i = 0, freq = 0; i < devfreq->max_state; i++, freq++) {
-		opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &freq);
+		opp = dev_pm_opp_find_freq_ceil_indexed(devfreq->dev.parent, &freq, 0);
 		if (IS_ERR(opp)) {
 			devm_kfree(devfreq->dev.parent, devfreq->freq_table);
 			return PTR_ERR(opp);
@@ -2036,18 +2036,18 @@ struct dev_pm_opp *devfreq_recommended_opp(struct device *dev,
 
 	if (flags & DEVFREQ_FLAG_LEAST_UPPER_BOUND) {
 		/* The freq is an upper bound. opp should be lower */
-		opp = dev_pm_opp_find_freq_floor(dev, freq);
+		opp = dev_pm_opp_find_freq_floor_indexed(dev, freq, 0);
 
 		/* If not available, use the closest opp */
 		if (opp == ERR_PTR(-ERANGE))
-			opp = dev_pm_opp_find_freq_ceil(dev, freq);
+			opp = dev_pm_opp_find_freq_ceil_indexed(dev, freq, 0);
 	} else {
 		/* The freq is an lower bound. opp should be higher */
-		opp = dev_pm_opp_find_freq_ceil(dev, freq);
+		opp = dev_pm_opp_find_freq_ceil_indexed(dev, freq, 0);
 
 		/* If not available, use the closest opp */
 		if (opp == ERR_PTR(-ERANGE))
-			opp = dev_pm_opp_find_freq_floor(dev, freq);
+			opp = dev_pm_opp_find_freq_floor_indexed(dev, freq, 0);
 	}
 
 	return opp;

drivers/devfreq/event/exynos-ppmu.c

@@ -12,9 +12,9 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/suspend.h>
 #include <linux/devfreq-event.h>
@@ -507,7 +507,6 @@ static int of_get_devfreq_events(struct device_node *np,
 	struct device *dev = info->dev;
 	struct device_node *events_np, *node;
 	int i, j, count;
-	const struct of_device_id *of_id;
 	int ret;
 
 	events_np = of_get_child_by_name(np, "events");
@@ -525,13 +524,7 @@ static int of_get_devfreq_events(struct device_node *np,
 	}
 	info->num_events = count;
 
-	of_id = of_match_device(exynos_ppmu_id_match, dev);
-	if (of_id)
-		info->ppmu_type = (enum exynos_ppmu_type)of_id->data;
-	else {
-		of_node_put(events_np);
-		return -EINVAL;
-	}
+	info->ppmu_type = (enum exynos_ppmu_type)device_get_match_data(dev);
 
 	j = 0;
 	for_each_child_of_node(events_np, node) {

drivers/devfreq/event/rockchip-dfi.c

@@ -16,30 +16,71 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/list.h>
+#include <linux/seqlock.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/perf_event.h>
 
+#include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
+#include <soc/rockchip/rk3568_grf.h>
+#include <soc/rockchip/rk3588_grf.h>
 
-#define RK3399_DMC_NUM_CH	2
+#define DMC_MAX_CHANNELS	4
+
+#define HIWORD_UPDATE(val, mask)	((val) | (mask) << 16)
 
 /* DDRMON_CTRL */
 #define DDRMON_CTRL	0x04
-#define CLR_DDRMON_CTRL	(0x1f0000 << 0)
-#define LPDDR4_EN	(0x10001 << 4)
-#define HARDWARE_EN	(0x10001 << 3)
-#define LPDDR3_EN	(0x10001 << 2)
-#define SOFTWARE_EN	(0x10001 << 1)
-#define SOFTWARE_DIS	(0x10000 << 1)
-#define TIME_CNT_EN	(0x10001 << 0)
+#define DDRMON_CTRL_DDR4		BIT(5)
+#define DDRMON_CTRL_LPDDR4		BIT(4)
+#define DDRMON_CTRL_HARDWARE_EN		BIT(3)
+#define DDRMON_CTRL_LPDDR23		BIT(2)
+#define DDRMON_CTRL_SOFTWARE_EN		BIT(1)
+#define DDRMON_CTRL_TIMER_CNT_EN	BIT(0)
+#define DDRMON_CTRL_DDR_TYPE_MASK	(DDRMON_CTRL_DDR4 | \
+					 DDRMON_CTRL_LPDDR4 | \
+					 DDRMON_CTRL_LPDDR23)
 
+#define DDRMON_CH0_WR_NUM		0x20
+#define DDRMON_CH0_RD_NUM		0x24
 #define DDRMON_CH0_COUNT_NUM		0x28
 #define DDRMON_CH0_DFI_ACCESS_NUM	0x2c
 #define DDRMON_CH1_COUNT_NUM		0x3c
 #define DDRMON_CH1_DFI_ACCESS_NUM	0x40
 
-struct dmc_usage {
-	u32 access;
-	u32 total;
+#define PERF_EVENT_CYCLES		0x0
+#define PERF_EVENT_READ_BYTES		0x1
+#define PERF_EVENT_WRITE_BYTES		0x2
+#define PERF_EVENT_READ_BYTES0		0x3
+#define PERF_EVENT_WRITE_BYTES0		0x4
+#define PERF_EVENT_READ_BYTES1		0x5
+#define PERF_EVENT_WRITE_BYTES1		0x6
+#define PERF_EVENT_READ_BYTES2		0x7
+#define PERF_EVENT_WRITE_BYTES2		0x8
+#define PERF_EVENT_READ_BYTES3		0x9
+#define PERF_EVENT_WRITE_BYTES3		0xa
+#define PERF_EVENT_BYTES		0xb
+#define PERF_ACCESS_TYPE_MAX		0xc
+
+/**
+ * struct dmc_count_channel - structure to hold counter values from the DDR controller
+ * @access:       Number of read and write accesses
+ * @clock_cycles: DDR clock cycles
+ * @read_access:  number of read accesses
+ * @write_access: number of write accesses
+ */
+struct dmc_count_channel {
+	u64 access;
+	u64 clock_cycles;
+	u64 read_access;
+	u64 write_access;
+};
+
+struct dmc_count {
+	struct dmc_count_channel c[DMC_MAX_CHANNELS];
 };
 
 /*
@@ -49,98 +90,157 @@ struct dmc_usage {
  */
 struct rockchip_dfi {
 	struct devfreq_event_dev *edev;
-	struct devfreq_event_desc *desc;
-	struct dmc_usage ch_usage[RK3399_DMC_NUM_CH];
+	struct devfreq_event_desc desc;
+	struct dmc_count last_event_count;
+
+	struct dmc_count last_perf_count;
+	struct dmc_count total_count;
+	seqlock_t count_seqlock; /* protects last_perf_count and total_count */
+
 	struct device *dev;
 	void __iomem *regs;
 	struct regmap *regmap_pmu;
 	struct clk *clk;
+	int usecount;
+	struct mutex mutex;
+	u32 ddr_type;
+	unsigned int channel_mask;
+	unsigned int max_channels;
+	enum cpuhp_state cpuhp_state;
+	struct hlist_node node;
+	struct pmu pmu;
+	struct hrtimer timer;
+	unsigned int cpu;
+	int active_events;
+	int burst_len;
+	int buswidth[DMC_MAX_CHANNELS];
+	int ddrmon_stride;
+	bool ddrmon_ctrl_single;
 };
 
-static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
+static int rockchip_dfi_enable(struct rockchip_dfi *dfi)
 {
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-	void __iomem *dfi_regs = info->regs;
-	u32 val;
-	u32 ddr_type;
+	void __iomem *dfi_regs = dfi->regs;
+	int i, ret = 0;
 
-	/* get ddr type */
-	regmap_read(info->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
-	ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
-		    RK3399_PMUGRF_DDRTYPE_MASK;
+	mutex_lock(&dfi->mutex);
 
-	/* clear DDRMON_CTRL setting */
-	writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
+	dfi->usecount++;
+	if (dfi->usecount > 1)
+		goto out;
 
-	/* set ddr type to dfi */
-	if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
-		writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
-	else if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
-		writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);
-
-	/* enable count, use software mode */
-	writel_relaxed(SOFTWARE_EN, dfi_regs + DDRMON_CTRL);
-}
-
-static void rockchip_dfi_stop_hardware_counter(struct devfreq_event_dev *edev)
-{
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-	void __iomem *dfi_regs = info->regs;
-
-	writel_relaxed(SOFTWARE_DIS, dfi_regs + DDRMON_CTRL);
-}
-
-static int rockchip_dfi_get_busier_ch(struct devfreq_event_dev *edev)
-{
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-	u32 tmp, max = 0;
-	u32 i, busier_ch = 0;
-	void __iomem *dfi_regs = info->regs;
-
-	rockchip_dfi_stop_hardware_counter(edev);
-
-	/* Find out which channel is busier */
-	for (i = 0; i < RK3399_DMC_NUM_CH; i++) {
-		info->ch_usage[i].access = readl_relaxed(dfi_regs +
-				DDRMON_CH0_DFI_ACCESS_NUM + i * 20) * 4;
-		info->ch_usage[i].total = readl_relaxed(dfi_regs +
-				DDRMON_CH0_COUNT_NUM + i * 20);
-		tmp = info->ch_usage[i].access;
-		if (tmp > max) {
-			busier_ch = i;
-			max = tmp;
-		}
-	}
-	rockchip_dfi_start_hardware_counter(edev);
-
-	return busier_ch;
-}
-
-static int rockchip_dfi_disable(struct devfreq_event_dev *edev)
-{
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-
-	rockchip_dfi_stop_hardware_counter(edev);
-	clk_disable_unprepare(info->clk);
-
-	return 0;
-}
-
-static int rockchip_dfi_enable(struct devfreq_event_dev *edev)
-{
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-	int ret;
-
-	ret = clk_prepare_enable(info->clk);
+	ret = clk_prepare_enable(dfi->clk);
 	if (ret) {
-		dev_err(&edev->dev, "failed to enable dfi clk: %d\n", ret);
-		return ret;
+		dev_err(&dfi->edev->dev, "failed to enable dfi clk: %d\n", ret);
+		goto out;
 	}
 
-	rockchip_dfi_start_hardware_counter(edev);
+	for (i = 0; i < dfi->max_channels; i++) {
+		u32 ctrl = 0;
+
+		if (!(dfi->channel_mask & BIT(i)))
+			continue;
+
+		/* clear DDRMON_CTRL setting */
+		writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_TIMER_CNT_EN |
+			       DDRMON_CTRL_SOFTWARE_EN | DDRMON_CTRL_HARDWARE_EN),
+			       dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL);
+
+		/* set ddr type to dfi */
+		switch (dfi->ddr_type) {
+		case ROCKCHIP_DDRTYPE_LPDDR2:
+		case ROCKCHIP_DDRTYPE_LPDDR3:
+			ctrl = DDRMON_CTRL_LPDDR23;
+			break;
+		case ROCKCHIP_DDRTYPE_LPDDR4:
+		case ROCKCHIP_DDRTYPE_LPDDR4X:
+			ctrl = DDRMON_CTRL_LPDDR4;
+			break;
+		default:
+			break;
+		}
+
+		writel_relaxed(HIWORD_UPDATE(ctrl, DDRMON_CTRL_DDR_TYPE_MASK),
+			       dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL);
+
+		/* enable count, use software mode */
+		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_SOFTWARE_EN, DDRMON_CTRL_SOFTWARE_EN),
+			       dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL);
+
+		if (dfi->ddrmon_ctrl_single)
+			break;
+	}
+out:
+	mutex_unlock(&dfi->mutex);
+
+	return ret;
+}
+
+static void rockchip_dfi_disable(struct rockchip_dfi *dfi)
+{
+	void __iomem *dfi_regs = dfi->regs;
+	int i;
+
+	mutex_lock(&dfi->mutex);
+
+	dfi->usecount--;
+
+	WARN_ON_ONCE(dfi->usecount < 0);
+
+	if (dfi->usecount > 0)
+		goto out;
+
+	for (i = 0; i < dfi->max_channels; i++) {
+		if (!(dfi->channel_mask & BIT(i)))
+			continue;
+
+		writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_SOFTWARE_EN),
+			      dfi_regs + i * dfi->ddrmon_stride + DDRMON_CTRL);
+
+		if (dfi->ddrmon_ctrl_single)
+			break;
+	}
+
+	clk_disable_unprepare(dfi->clk);
+out:
+	mutex_unlock(&dfi->mutex);
+}
+
+static void rockchip_dfi_read_counters(struct rockchip_dfi *dfi, struct dmc_count *res)
+{
+	u32 i;
+	void __iomem *dfi_regs = dfi->regs;
+
+	for (i = 0; i < dfi->max_channels; i++) {
+		if (!(dfi->channel_mask & BIT(i)))
+			continue;
+		res->c[i].read_access = readl_relaxed(dfi_regs +
+				DDRMON_CH0_RD_NUM + i * dfi->ddrmon_stride);
+		res->c[i].write_access = readl_relaxed(dfi_regs +
+				DDRMON_CH0_WR_NUM + i * dfi->ddrmon_stride);
+		res->c[i].access = readl_relaxed(dfi_regs +
+				DDRMON_CH0_DFI_ACCESS_NUM + i * dfi->ddrmon_stride);
+		res->c[i].clock_cycles = readl_relaxed(dfi_regs +
+				DDRMON_CH0_COUNT_NUM + i * dfi->ddrmon_stride);
+	}
+}
+
+static int rockchip_dfi_event_disable(struct devfreq_event_dev *edev)
+{
+	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
+
+	rockchip_dfi_disable(dfi);
+
 	return 0;
 }
 
+static int rockchip_dfi_event_enable(struct devfreq_event_dev *edev)
+{
+	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
+
+	return rockchip_dfi_enable(dfi);
+}
+
 static int rockchip_dfi_set_event(struct devfreq_event_dev *edev)
 {
 	return 0;
@@ -149,77 +249,576 @@ static int rockchip_dfi_set_event(struct devfreq_event_dev *edev)
 static int rockchip_dfi_get_event(struct devfreq_event_dev *edev,
 				  struct devfreq_event_data *edata)
 {
-	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
-	int busier_ch;
+	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
+	struct dmc_count count;
+	struct dmc_count *last = &dfi->last_event_count;
+	u32 access = 0, clock_cycles = 0;
+	int i;
 
-	busier_ch = rockchip_dfi_get_busier_ch(edev);
+	rockchip_dfi_read_counters(dfi, &count);
 
-	edata->load_count = info->ch_usage[busier_ch].access;
-	edata->total_count = info->ch_usage[busier_ch].total;
+	/* We can only report one channel, so find the busiest one */
+	for (i = 0; i < dfi->max_channels; i++) {
+		u32 a, c;
+
+		if (!(dfi->channel_mask & BIT(i)))
+			continue;
+
+		a = count.c[i].access - last->c[i].access;
+		c = count.c[i].clock_cycles - last->c[i].clock_cycles;
+
+		if (a > access) {
+			access = a;
+			clock_cycles = c;
+		}
+	}
+
+	edata->load_count = access * 4;
+	edata->total_count = clock_cycles;
+
+	dfi->last_event_count = count;
 
 	return 0;
 }
 
 static const struct devfreq_event_ops rockchip_dfi_ops = {
-	.disable = rockchip_dfi_disable,
-	.enable = rockchip_dfi_enable,
+	.disable = rockchip_dfi_event_disable,
+	.enable = rockchip_dfi_event_enable,
 	.get_event = rockchip_dfi_get_event,
 	.set_event = rockchip_dfi_set_event,
 };
 
+#ifdef CONFIG_PERF_EVENTS
+
+static void rockchip_ddr_perf_counters_add(struct rockchip_dfi *dfi,
+					   const struct dmc_count *now,
+					   struct dmc_count *res)
+{
+	const struct dmc_count *last = &dfi->last_perf_count;
+	int i;
+
+	for (i = 0; i < dfi->max_channels; i++) {
+		res->c[i].read_access = dfi->total_count.c[i].read_access +
+			(u32)(now->c[i].read_access - last->c[i].read_access);
+		res->c[i].write_access = dfi->total_count.c[i].write_access +
+			(u32)(now->c[i].write_access - last->c[i].write_access);
+		res->c[i].access = dfi->total_count.c[i].access +
+			(u32)(now->c[i].access - last->c[i].access);
+		res->c[i].clock_cycles = dfi->total_count.c[i].clock_cycles +
+			(u32)(now->c[i].clock_cycles - last->c[i].clock_cycles);
+	}
+}
+
+static ssize_t ddr_perf_cpumask_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct pmu *pmu = dev_get_drvdata(dev);
+	struct rockchip_dfi *dfi = container_of(pmu, struct rockchip_dfi, pmu);
+
+	return cpumap_print_to_pagebuf(true, buf, cpumask_of(dfi->cpu));
+}
+
+static struct device_attribute ddr_perf_cpumask_attr =
+	__ATTR(cpumask, 0444, ddr_perf_cpumask_show, NULL);
+
+static struct attribute *ddr_perf_cpumask_attrs[] = {
+	&ddr_perf_cpumask_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group ddr_perf_cpumask_attr_group = {
+	.attrs = ddr_perf_cpumask_attrs,
+};
+
+PMU_EVENT_ATTR_STRING(cycles, ddr_pmu_cycles, "event="__stringify(PERF_EVENT_CYCLES))
+
+#define DFI_PMU_EVENT_ATTR(_name, _var, _str) \
+	PMU_EVENT_ATTR_STRING(_name, _var, _str); \
+	PMU_EVENT_ATTR_STRING(_name.unit, _var##_unit, "MB"); \
+	PMU_EVENT_ATTR_STRING(_name.scale, _var##_scale, "9.536743164e-07")
+
+DFI_PMU_EVENT_ATTR(read-bytes0, ddr_pmu_read_bytes0, "event="__stringify(PERF_EVENT_READ_BYTES0));
+DFI_PMU_EVENT_ATTR(write-bytes0, ddr_pmu_write_bytes0, "event="__stringify(PERF_EVENT_WRITE_BYTES0));
+
+DFI_PMU_EVENT_ATTR(read-bytes1, ddr_pmu_read_bytes1, "event="__stringify(PERF_EVENT_READ_BYTES1));
+DFI_PMU_EVENT_ATTR(write-bytes1, ddr_pmu_write_bytes1, "event="__stringify(PERF_EVENT_WRITE_BYTES1));
+
+DFI_PMU_EVENT_ATTR(read-bytes2, ddr_pmu_read_bytes2, "event="__stringify(PERF_EVENT_READ_BYTES2));
+DFI_PMU_EVENT_ATTR(write-bytes2, ddr_pmu_write_bytes2, "event="__stringify(PERF_EVENT_WRITE_BYTES2));
+
+DFI_PMU_EVENT_ATTR(read-bytes3, ddr_pmu_read_bytes3, "event="__stringify(PERF_EVENT_READ_BYTES3));
+DFI_PMU_EVENT_ATTR(write-bytes3, ddr_pmu_write_bytes3, "event="__stringify(PERF_EVENT_WRITE_BYTES3));
+
+DFI_PMU_EVENT_ATTR(read-bytes, ddr_pmu_read_bytes, "event="__stringify(PERF_EVENT_READ_BYTES));
+DFI_PMU_EVENT_ATTR(write-bytes, ddr_pmu_write_bytes, "event="__stringify(PERF_EVENT_WRITE_BYTES));
+
+DFI_PMU_EVENT_ATTR(bytes, ddr_pmu_bytes, "event="__stringify(PERF_EVENT_BYTES));
+
+#define DFI_ATTR_MB(_name) 		\
+	&_name.attr.attr,		\
+	&_name##_unit.attr.attr,	\
+	&_name##_scale.attr.attr
+
+static struct attribute *ddr_perf_events_attrs[] = {
+	&ddr_pmu_cycles.attr.attr,
+	DFI_ATTR_MB(ddr_pmu_read_bytes),
+	DFI_ATTR_MB(ddr_pmu_write_bytes),
+	DFI_ATTR_MB(ddr_pmu_read_bytes0),
+	DFI_ATTR_MB(ddr_pmu_write_bytes0),
+	DFI_ATTR_MB(ddr_pmu_read_bytes1),
+	DFI_ATTR_MB(ddr_pmu_write_bytes1),
+	DFI_ATTR_MB(ddr_pmu_read_bytes2),
+	DFI_ATTR_MB(ddr_pmu_write_bytes2),
+	DFI_ATTR_MB(ddr_pmu_read_bytes3),
+	DFI_ATTR_MB(ddr_pmu_write_bytes3),
+	DFI_ATTR_MB(ddr_pmu_bytes),
+	NULL,
+};
+
+static const struct attribute_group ddr_perf_events_attr_group = {
+	.name = "events",
+	.attrs = ddr_perf_events_attrs,
+};
+
+PMU_FORMAT_ATTR(event, "config:0-7");
+
+static struct attribute *ddr_perf_format_attrs[] = {
+	&format_attr_event.attr,
+	NULL,
+};
+
+static const struct attribute_group ddr_perf_format_attr_group = {
+	.name = "format",
+	.attrs = ddr_perf_format_attrs,
+};
+
+static const struct attribute_group *attr_groups[] = {
+	&ddr_perf_events_attr_group,
+	&ddr_perf_cpumask_attr_group,
+	&ddr_perf_format_attr_group,
+	NULL,
+};
+
+static int rockchip_ddr_perf_event_init(struct perf_event *event)
+{
+	struct rockchip_dfi *dfi = container_of(event->pmu, struct rockchip_dfi, pmu);
+
+	if (event->attr.type != event->pmu->type)
+		return -ENOENT;
+
+	if (event->attach_state & PERF_ATTACH_TASK)
+		return -EINVAL;
+
+	if (event->cpu < 0) {
+		dev_warn(dfi->dev, "Can't provide per-task data!\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static u64 rockchip_ddr_perf_event_get_count(struct perf_event *event)
+{
+	struct rockchip_dfi *dfi = container_of(event->pmu, struct rockchip_dfi, pmu);
+	int blen = dfi->burst_len;
+	struct dmc_count total, now;
+	unsigned int seq;
+	u64 count = 0;
+	int i;
+
+	rockchip_dfi_read_counters(dfi, &now);
+
+	do {
+		seq = read_seqbegin(&dfi->count_seqlock);
+		rockchip_ddr_perf_counters_add(dfi, &now, &total);
+	} while (read_seqretry(&dfi->count_seqlock, seq));
+
+	switch (event->attr.config) {
+	case PERF_EVENT_CYCLES:
+		count = total.c[0].clock_cycles;
+		break;
+	case PERF_EVENT_READ_BYTES:
+		for (i = 0; i < dfi->max_channels; i++)
+			count += total.c[i].read_access * blen * dfi->buswidth[i];
+		break;
+	case PERF_EVENT_WRITE_BYTES:
+		for (i = 0; i < dfi->max_channels; i++)
+			count += total.c[i].write_access * blen * dfi->buswidth[i];
+		break;
+	case PERF_EVENT_READ_BYTES0:
+		count = total.c[0].read_access * blen * dfi->buswidth[0];
+		break;
+	case PERF_EVENT_WRITE_BYTES0:
+		count = total.c[0].write_access * blen * dfi->buswidth[0];
+		break;
+	case PERF_EVENT_READ_BYTES1:
+		count = total.c[1].read_access * blen * dfi->buswidth[1];
+		break;
+	case PERF_EVENT_WRITE_BYTES1:
+		count = total.c[1].write_access * blen * dfi->buswidth[1];
+		break;
+	case PERF_EVENT_READ_BYTES2:
+		count = total.c[2].read_access * blen * dfi->buswidth[2];
+		break;
+	case PERF_EVENT_WRITE_BYTES2:
+		count = total.c[2].write_access * blen * dfi->buswidth[2];
+		break;
+	case PERF_EVENT_READ_BYTES3:
+		count = total.c[3].read_access * blen * dfi->buswidth[3];
+		break;
+	case PERF_EVENT_WRITE_BYTES3:
+		count = total.c[3].write_access * blen * dfi->buswidth[3];
+		break;
+	case PERF_EVENT_BYTES:
+		for (i = 0; i < dfi->max_channels; i++)
+			count += total.c[i].access * blen * dfi->buswidth[i];
+		break;
+	}
+
+	return count;
+}
+
+static void rockchip_ddr_perf_event_update(struct perf_event *event)
+{
+	u64 now;
+	s64 prev;
+
+	if (event->attr.config >= PERF_ACCESS_TYPE_MAX)
+		return;
+
+	now = rockchip_ddr_perf_event_get_count(event);
+	prev = local64_xchg(&event->hw.prev_count, now);
+	local64_add(now - prev, &event->count);
+}
+
+static void rockchip_ddr_perf_event_start(struct perf_event *event, int flags)
+{
+	u64 now = rockchip_ddr_perf_event_get_count(event);
+
+	local64_set(&event->hw.prev_count, now);
+}
+
+static int rockchip_ddr_perf_event_add(struct perf_event *event, int flags)
+{
+	struct rockchip_dfi *dfi = container_of(event->pmu, struct rockchip_dfi, pmu);
+
+	dfi->active_events++;
+
+	if (dfi->active_events == 1) {
+		dfi->total_count = (struct dmc_count){};
+		rockchip_dfi_read_counters(dfi, &dfi->last_perf_count);
+		hrtimer_start(&dfi->timer, ns_to_ktime(NSEC_PER_SEC), HRTIMER_MODE_REL);
+	}
+
+	if (flags & PERF_EF_START)
+		rockchip_ddr_perf_event_start(event, flags);
+
+	return 0;
+}
+
+static void rockchip_ddr_perf_event_stop(struct perf_event *event, int flags)
+{
+	rockchip_ddr_perf_event_update(event);
+}
+
+static void rockchip_ddr_perf_event_del(struct perf_event *event, int flags)
+{
+	struct rockchip_dfi *dfi = container_of(event->pmu, struct rockchip_dfi, pmu);
+
+	rockchip_ddr_perf_event_stop(event, PERF_EF_UPDATE);
+
+	dfi->active_events--;
+
+	if (dfi->active_events == 0)
+		hrtimer_cancel(&dfi->timer);
+}
+
+static enum hrtimer_restart rockchip_dfi_timer(struct hrtimer *timer)
+{
+	struct rockchip_dfi *dfi = container_of(timer, struct rockchip_dfi, timer);
+	struct dmc_count now, total;
+
+	rockchip_dfi_read_counters(dfi, &now);
+
+	write_seqlock(&dfi->count_seqlock);
+
+	rockchip_ddr_perf_counters_add(dfi, &now, &total);
+	dfi->total_count = total;
+	dfi->last_perf_count = now;
+
+	write_sequnlock(&dfi->count_seqlock);
+
+	hrtimer_forward_now(&dfi->timer, ns_to_ktime(NSEC_PER_SEC));
+
+	return HRTIMER_RESTART;
+};
+
+static int ddr_perf_offline_cpu(unsigned int cpu, struct hlist_node *node)
+{
+	struct rockchip_dfi *dfi = hlist_entry_safe(node, struct rockchip_dfi, node);
+	int target;
+
+	if (cpu != dfi->cpu)
+		return 0;
+
+	target = cpumask_any_but(cpu_online_mask, cpu);
+	if (target >= nr_cpu_ids)
+		return 0;
+
+	perf_pmu_migrate_context(&dfi->pmu, cpu, target);
+	dfi->cpu = target;
+
+	return 0;
+}
+
+static void rockchip_ddr_cpuhp_remove_state(void *data)
+{
+	struct rockchip_dfi *dfi = data;
+
+	cpuhp_remove_multi_state(dfi->cpuhp_state);
+
+	rockchip_dfi_disable(dfi);
+}
+
+static void rockchip_ddr_cpuhp_remove_instance(void *data)
+{
+	struct rockchip_dfi *dfi = data;
+
+	cpuhp_state_remove_instance_nocalls(dfi->cpuhp_state, &dfi->node);
+}
+
+static void rockchip_ddr_perf_remove(void *data)
+{
+	struct rockchip_dfi *dfi = data;
+
+	perf_pmu_unregister(&dfi->pmu);
+}
+
+static int rockchip_ddr_perf_init(struct rockchip_dfi *dfi)
+{
+	struct pmu *pmu = &dfi->pmu;
+	int ret;
+
+	seqlock_init(&dfi->count_seqlock);
+
+	pmu->module = THIS_MODULE;
+	pmu->capabilities = PERF_PMU_CAP_NO_EXCLUDE;
+	pmu->task_ctx_nr = perf_invalid_context;
+	pmu->attr_groups = attr_groups;
+	pmu->event_init  = rockchip_ddr_perf_event_init;
+	pmu->add = rockchip_ddr_perf_event_add;
+	pmu->del = rockchip_ddr_perf_event_del;
+	pmu->start = rockchip_ddr_perf_event_start;
+	pmu->stop = rockchip_ddr_perf_event_stop;
+	pmu->read = rockchip_ddr_perf_event_update;
+
+	dfi->cpu = raw_smp_processor_id();
+
+	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+				      "rockchip_ddr_perf_pmu",
+				      NULL,
+				      ddr_perf_offline_cpu);
+
+	if (ret < 0) {
+		dev_err(dfi->dev, "cpuhp_setup_state_multi failed: %d\n", ret);
+		return ret;
+	}
+
+	dfi->cpuhp_state = ret;
+
+	rockchip_dfi_enable(dfi);
+
+	ret = devm_add_action_or_reset(dfi->dev, rockchip_ddr_cpuhp_remove_state, dfi);
+	if (ret)
+		return ret;
+
+	ret = cpuhp_state_add_instance_nocalls(dfi->cpuhp_state, &dfi->node);
+	if (ret) {
+		dev_err(dfi->dev, "Error %d registering hotplug\n", ret);
+		return ret;
+	}
+
+	ret = devm_add_action_or_reset(dfi->dev, rockchip_ddr_cpuhp_remove_instance, dfi);
+	if (ret)
+		return ret;
+
+	hrtimer_init(&dfi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	dfi->timer.function = rockchip_dfi_timer;
+
+	switch (dfi->ddr_type) {
+	case ROCKCHIP_DDRTYPE_LPDDR2:
+	case ROCKCHIP_DDRTYPE_LPDDR3:
+		dfi->burst_len = 8;
+		break;
+	case ROCKCHIP_DDRTYPE_LPDDR4:
+	case ROCKCHIP_DDRTYPE_LPDDR4X:
+		dfi->burst_len = 16;
+		break;
+	}
+
+	ret = perf_pmu_register(pmu, "rockchip_ddr", -1);
+	if (ret)
+		return ret;
+
+	return devm_add_action_or_reset(dfi->dev, rockchip_ddr_perf_remove, dfi);
+}
+#else
+static int rockchip_ddr_perf_init(struct rockchip_dfi *dfi)
+{
+	return 0;
+}
+#endif
+
+static int rk3399_dfi_init(struct rockchip_dfi *dfi)
+{
+	struct regmap *regmap_pmu = dfi->regmap_pmu;
+	u32 val;
+
+	dfi->clk = devm_clk_get(dfi->dev, "pclk_ddr_mon");
+	if (IS_ERR(dfi->clk))
+		return dev_err_probe(dfi->dev, PTR_ERR(dfi->clk),
+				     "Cannot get the clk pclk_ddr_mon\n");
+
+	/* get ddr type */
+	regmap_read(regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
+	dfi->ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);
+
+	dfi->channel_mask = GENMASK(1, 0);
+	dfi->max_channels = 2;
+
+	dfi->buswidth[0] = FIELD_GET(RK3399_PMUGRF_OS_REG2_BW_CH0, val) == 0 ? 4 : 2;
+	dfi->buswidth[1] = FIELD_GET(RK3399_PMUGRF_OS_REG2_BW_CH1, val) == 0 ? 4 : 2;
+
+	dfi->ddrmon_stride = 0x14;
+	dfi->ddrmon_ctrl_single = true;
+
+	return 0;
+};
+
+static int rk3568_dfi_init(struct rockchip_dfi *dfi)
+{
+	struct regmap *regmap_pmu = dfi->regmap_pmu;
+	u32 reg2, reg3;
+
+	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG2, &reg2);
+	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG3, &reg3);
+
+	/* lower 3 bits of the DDR type */
+	dfi->ddr_type = FIELD_GET(RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO, reg2);
+
+	/*
+	 * For version three and higher the upper two bits of the DDR type are
+	 * in RK3568_PMUGRF_OS_REG3
+	 */
+	if (FIELD_GET(RK3568_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
+		dfi->ddr_type |= FIELD_GET(RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3, reg3) << 3;
+
+	dfi->channel_mask = BIT(0);
+	dfi->max_channels = 1;
+
+	dfi->buswidth[0] = FIELD_GET(RK3568_PMUGRF_OS_REG2_BW_CH0, reg2) == 0 ? 4 : 2;
+
+	dfi->ddrmon_stride = 0x0; /* not relevant, we only have a single channel on this SoC */
+	dfi->ddrmon_ctrl_single = true;
+
+	return 0;
+};
+
+static int rk3588_dfi_init(struct rockchip_dfi *dfi)
+{
+	struct regmap *regmap_pmu = dfi->regmap_pmu;
+	u32 reg2, reg3, reg4;
+
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG2, &reg2);
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG3, &reg3);
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG4, &reg4);
+
+	/* lower 3 bits of the DDR type */
+	dfi->ddr_type = FIELD_GET(RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO, reg2);
+
+	/*
+	 * For version three and higher the upper two bits of the DDR type are
+	 * in RK3588_PMUGRF_OS_REG3
+	 */
+	if (FIELD_GET(RK3588_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
+		dfi->ddr_type |= FIELD_GET(RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3, reg3) << 3;
+
+	dfi->buswidth[0] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH0, reg2) == 0 ? 4 : 2;
+	dfi->buswidth[1] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg2) == 0 ? 4 : 2;
+	dfi->buswidth[2] = FIELD_GET(RK3568_PMUGRF_OS_REG2_BW_CH0, reg4) == 0 ? 4 : 2;
+	dfi->buswidth[3] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg4) == 0 ? 4 : 2;
+	dfi->channel_mask = FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg2) |
+			    FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg4) << 2;
+	dfi->max_channels = 4;
+
+	dfi->ddrmon_stride = 0x4000;
+
+	return 0;
+};
+
 static const struct of_device_id rockchip_dfi_id_match[] = {
-	{ .compatible = "rockchip,rk3399-dfi" },
+	{ .compatible = "rockchip,rk3399-dfi", .data = rk3399_dfi_init },
+	{ .compatible = "rockchip,rk3568-dfi", .data = rk3568_dfi_init },
+	{ .compatible = "rockchip,rk3588-dfi", .data = rk3588_dfi_init },
 	{ },
 };
+
 MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
 
 static int rockchip_dfi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct rockchip_dfi *data;
+	struct rockchip_dfi *dfi;
 	struct devfreq_event_desc *desc;
 	struct device_node *np = pdev->dev.of_node, *node;
+	int (*soc_init)(struct rockchip_dfi *dfi);
+	int ret;
 
-	data = devm_kzalloc(dev, sizeof(struct rockchip_dfi), GFP_KERNEL);
-	if (!data)
+	soc_init = of_device_get_match_data(&pdev->dev);
+	if (!soc_init)
+		return -EINVAL;
+
+	dfi = devm_kzalloc(dev, sizeof(*dfi), GFP_KERNEL);
+	if (!dfi)
 		return -ENOMEM;
 
-	data->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(data->regs))
-		return PTR_ERR(data->regs);
+	dfi->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dfi->regs))
+		return PTR_ERR(dfi->regs);
 
-	data->clk = devm_clk_get(dev, "pclk_ddr_mon");
-	if (IS_ERR(data->clk))
-		return dev_err_probe(dev, PTR_ERR(data->clk),
-				     "Cannot get the clk pclk_ddr_mon\n");
-
-	/* try to find the optional reference to the pmu syscon */
 	node = of_parse_phandle(np, "rockchip,pmu", 0);
-	if (node) {
-		data->regmap_pmu = syscon_node_to_regmap(node);
-		of_node_put(node);
-		if (IS_ERR(data->regmap_pmu))
-			return PTR_ERR(data->regmap_pmu);
-	}
-	data->dev = dev;
+	if (!node)
+		return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n");
 
-	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
-	if (!desc)
-		return -ENOMEM;
+	dfi->regmap_pmu = syscon_node_to_regmap(node);
+	of_node_put(node);
+	if (IS_ERR(dfi->regmap_pmu))
+		return PTR_ERR(dfi->regmap_pmu);
 
+	dfi->dev = dev;
+	mutex_init(&dfi->mutex);
+
+	desc = &dfi->desc;
 	desc->ops = &rockchip_dfi_ops;
-	desc->driver_data = data;
+	desc->driver_data = dfi;
 	desc->name = np->name;
-	data->desc = desc;
 
-	data->edev = devm_devfreq_event_add_edev(&pdev->dev, desc);
-	if (IS_ERR(data->edev)) {
+	ret = soc_init(dfi);
+	if (ret)
+		return ret;
+
+	dfi->edev = devm_devfreq_event_add_edev(&pdev->dev, desc);
+	if (IS_ERR(dfi->edev)) {
 		dev_err(&pdev->dev,
 			"failed to add devfreq-event device\n");
-		return PTR_ERR(data->edev);
+		return PTR_ERR(dfi->edev);
 	}
 
-	platform_set_drvdata(pdev, data);
+	ret = rockchip_ddr_perf_init(dfi);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, dfi);
 
 	return 0;
 }
@@ -229,6 +828,7 @@ static struct platform_driver rockchip_dfi_driver = {
 	.driver = {
 		.name	= "rockchip-dfi",
 		.of_match_table = rockchip_dfi_id_match,
+		.suppress_bind_attrs = true,
 	},
 };
 module_platform_driver(rockchip_dfi_driver);

drivers/devfreq/mtk-cci-devfreq.c

@@ -137,6 +137,8 @@ static int mtk_ccifreq_target(struct device *dev, unsigned long *freq,
 	if (drv->pre_freq == *freq)
 		return 0;
 
+	mutex_lock(&drv->reg_lock);
+
 	inter_voltage = drv->inter_voltage;
 	cci_pll = clk_get_parent(drv->cci_clk);
 
@@ -144,11 +146,10 @@ static int mtk_ccifreq_target(struct device *dev, unsigned long *freq,
 	opp = devfreq_recommended_opp(dev, &opp_rate, 1);
 	if (IS_ERR(opp)) {
 		dev_err(dev, "failed to find opp for freq: %ld\n", opp_rate);
-		return PTR_ERR(opp);
+		ret = PTR_ERR(opp);
+		goto out_unlock;
 	}
 
-	mutex_lock(&drv->reg_lock);
-
 	voltage = dev_pm_opp_get_voltage(opp);
 	dev_pm_opp_put(opp);
 
@@ -227,9 +228,9 @@ static int mtk_ccifreq_opp_notifier(struct notifier_block *nb,
 	drv = container_of(nb, struct mtk_ccifreq_drv, opp_nb);
 
 	if (event == OPP_EVENT_ADJUST_VOLTAGE) {
+		mutex_lock(&drv->reg_lock);
 		freq = dev_pm_opp_get_freq(opp);
 
-		mutex_lock(&drv->reg_lock);
 		/* current opp item is changed */
 		if (freq == drv->pre_freq) {
 			volt = dev_pm_opp_get_voltage(opp);

drivers/devfreq/rk3399_dmc.c

@@ -22,6 +22,7 @@
 #include <linux/suspend.h>
 
 #include <soc/rockchip/pm_domains.h>
+#include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
 #include <soc/rockchip/rockchip_sip.h>
 
@@ -381,17 +382,16 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	}
 
 	regmap_read(data->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
-	ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
-		    RK3399_PMUGRF_DDRTYPE_MASK;
+	ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);
 
 	switch (ddr_type) {
-	case RK3399_PMUGRF_DDRTYPE_DDR3:
+	case ROCKCHIP_DDRTYPE_DDR3:
 		data->odt_dis_freq = data->ddr3_odt_dis_freq;
 		break;
-	case RK3399_PMUGRF_DDRTYPE_LPDDR3:
+	case ROCKCHIP_DDRTYPE_LPDDR3:
 		data->odt_dis_freq = data->lpddr3_odt_dis_freq;
 		break;
-	case RK3399_PMUGRF_DDRTYPE_LPDDR4:
+	case ROCKCHIP_DDRTYPE_LPDDR4:
 		data->odt_dis_freq = data->lpddr4_odt_dis_freq;
 		break;
 	default:

drivers/opp/core.c

@@ -813,6 +813,31 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil);
 
+/**
+ * dev_pm_opp_find_level_floor() - Search for a rounded floor level
+ * @dev:	device for which we do this operation
+ * @level:	Start level
+ *
+ * Search for the matching floor *available* OPP from a starting level
+ * for a device.
+ *
+ * Return: matching *opp and refreshes *level accordingly, else returns
+ * ERR_PTR in case of error and should be handled using IS_ERR. Error return
+ * values can be:
+ * EINVAL:	for bad pointer
+ * ERANGE:	no match found for search
+ * ENODEV:	if device not found in list of registered devices
+ *
+ * The callers are required to call dev_pm_opp_put() for the returned OPP after
+ * use.
+ */
+struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
+					       unsigned long *level)
+{
+	return _find_key_floor(dev, level, 0, true, _read_level, NULL);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor);
+
 /**
  * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth
  * @dev:	device for which we do this operation
@@ -1030,7 +1055,7 @@ static int _set_performance_state(struct device *dev, struct device *pd_dev,
 	if (!pd_dev)
 		return 0;
 
-	ret = dev_pm_genpd_set_performance_state(pd_dev, pstate);
+	ret = dev_pm_domain_set_performance_state(pd_dev, pstate);
 	if (ret) {
 		dev_err(dev, "Failed to set performance state of %s: %d (%d)\n",
 			dev_name(pd_dev), pstate, ret);
@@ -1051,32 +1076,28 @@ static int _opp_set_required_opps_genpd(struct device *dev,
 {
 	struct device **genpd_virt_devs =
 		opp_table->genpd_virt_devs ? opp_table->genpd_virt_devs : &dev;
-	int i, ret = 0;
-
-	/*
-	 * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev
-	 * after it is freed from another thread.
-	 */
-	mutex_lock(&opp_table->genpd_virt_dev_lock);
+	int index, target, delta, ret;
 
 	/* Scaling up? Set required OPPs in normal order, else reverse */
 	if (!scaling_down) {
-		for (i = 0; i < opp_table->required_opp_count; i++) {
-			ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
-			if (ret)
-				break;
-		}
+		index = 0;
+		target = opp_table->required_opp_count;
+		delta = 1;
 	} else {
-		for (i = opp_table->required_opp_count - 1; i >= 0; i--) {
-			ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
-			if (ret)
-				break;
-		}
+		index = opp_table->required_opp_count - 1;
+		target = -1;
+		delta = -1;
 	}
 
-	mutex_unlock(&opp_table->genpd_virt_dev_lock);
+	while (index != target) {
+		ret = _set_performance_state(dev, genpd_virt_devs[index], opp, index);
+		if (ret)
+			return ret;
 
-	return ret;
+		index += delta;
+	}
+
+	return 0;
 }
 
 /* This is only called for PM domain for now */
@@ -1107,6 +1128,28 @@ void _update_set_required_opps(struct opp_table *opp_table)
 		opp_table->set_required_opps = _opp_set_required_opps_generic;
 }
 
+static int _set_opp_level(struct device *dev, struct opp_table *opp_table,
+			  struct dev_pm_opp *opp)
+{
+	unsigned int level = 0;
+	int ret = 0;
+
+	if (opp) {
+		if (!opp->level)
+			return 0;
+
+		level = opp->level;
+	}
+
+	/* Request a new performance state through the device's PM domain. */
+	ret = dev_pm_domain_set_performance_state(dev, level);
+	if (ret)
+		dev_err(dev, "Failed to set performance state %u (%d)\n", level,
+			ret);
+
+	return ret;
+}
+
 static void _find_current_opp(struct device *dev, struct opp_table *opp_table)
 {
 	struct dev_pm_opp *opp = ERR_PTR(-ENODEV);
@@ -1154,8 +1197,13 @@ static int _disable_opp_table(struct device *dev, struct opp_table *opp_table)
 	if (opp_table->regulators)
 		regulator_disable(opp_table->regulators[0]);
 
+	ret = _set_opp_level(dev, opp_table, NULL);
+	if (ret)
+		goto out;
+
 	ret = _set_required_opps(dev, opp_table, NULL, false);
 
+out:
 	opp_table->enabled = false;
 	return ret;
 }
@@ -1198,6 +1246,10 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
 			return ret;
 		}
 
+		ret = _set_opp_level(dev, opp_table, opp);
+		if (ret)
+			return ret;
+
 		ret = _set_opp_bw(opp_table, opp, dev);
 		if (ret) {
 			dev_err(dev, "Failed to set bw: %d\n", ret);
@@ -1241,6 +1293,10 @@ static int _set_opp(struct device *dev, struct opp_table *opp_table,
 			return ret;
 		}
 
+		ret = _set_opp_level(dev, opp_table, opp);
+		if (ret)
+			return ret;
+
 		ret = _set_required_opps(dev, opp_table, opp, false);
 		if (ret) {
 			dev_err(dev, "Failed to set required opps: %d\n", ret);
@@ -1410,7 +1466,6 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 		return ERR_PTR(-ENOMEM);
 
 	mutex_init(&opp_table->lock);
-	mutex_init(&opp_table->genpd_virt_dev_lock);
 	INIT_LIST_HEAD(&opp_table->dev_list);
 	INIT_LIST_HEAD(&opp_table->lazy);
 
@@ -1446,7 +1501,6 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 remove_opp_dev:
 	_of_clear_opp_table(opp_table);
 	_remove_opp_dev(opp_dev, opp_table);
-	mutex_destroy(&opp_table->genpd_virt_dev_lock);
 	mutex_destroy(&opp_table->lock);
 err:
 	kfree(opp_table);
@@ -1614,7 +1668,6 @@ static void _opp_table_kref_release(struct kref *kref)
 	list_for_each_entry_safe(opp_dev, temp, &opp_table->dev_list, node)
 		_remove_opp_dev(opp_dev, opp_table);
 
-	mutex_destroy(&opp_table->genpd_virt_dev_lock);
 	mutex_destroy(&opp_table->lock);
 	kfree(opp_table);
 }
@@ -2002,8 +2055,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
  * _opp_add_v1() - Allocate a OPP based on v1 bindings.
  * @opp_table:	OPP table
  * @dev:	device for which we do this operation
- * @freq:	Frequency in Hz for this OPP
- * @u_volt:	Voltage in uVolts for this OPP
+ * @data:	The OPP data for the OPP to add
  * @dynamic:	Dynamically added OPPs.
  *
  * This function adds an opp definition to the opp table and returns status.
@@ -2021,10 +2073,10 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
  * -ENOMEM	Memory allocation failure
  */
 int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
-		unsigned long freq, long u_volt, bool dynamic)
+		struct dev_pm_opp_data *data, bool dynamic)
 {
 	struct dev_pm_opp *new_opp;
-	unsigned long tol;
+	unsigned long tol, u_volt = data->u_volt;
 	int ret;
 
 	if (!assert_single_clk(opp_table))
@@ -2035,7 +2087,8 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
 		return -ENOMEM;
 
 	/* populate the opp table */
-	new_opp->rates[0] = freq;
+	new_opp->rates[0] = data->freq;
+	new_opp->level = data->level;
 	tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
 	new_opp->supplies[0].u_volt = u_volt;
 	new_opp->supplies[0].u_volt_min = u_volt - tol;
@@ -2064,12 +2117,7 @@ free_opp:
 	return ret;
 }
 
-/**
- * _opp_set_supported_hw() - Set supported platforms
- * @dev: Device for which supported-hw has to be set.
- * @versions: Array of hierarchy of versions to match.
- * @count: Number of elements in the array.
- *
+/*
  * This is required only for the V2 bindings, and it enables a platform to
  * specify the hierarchy of versions it supports. OPP layer will then enable
  * OPPs, which are available for those versions, based on its 'opp-supported-hw'
@@ -2092,14 +2140,6 @@ static int _opp_set_supported_hw(struct opp_table *opp_table,
 	return 0;
 }
 
-/**
- * _opp_put_supported_hw() - Releases resources blocked for supported hw
- * @opp_table: OPP table returned by _opp_set_supported_hw().
- *
- * This is required only for the V2 bindings, and is called for a matching
- * _opp_set_supported_hw(). Until this is called, the opp_table structure
- * will not be freed.
- */
 static void _opp_put_supported_hw(struct opp_table *opp_table)
 {
 	if (opp_table->supported_hw) {
@@ -2109,11 +2149,7 @@ static void _opp_put_supported_hw(struct opp_table *opp_table)
 	}
 }
 
-/**
- * _opp_set_prop_name() - Set prop-extn name
- * @dev: Device for which the prop-name has to be set.
- * @name: name to postfix to properties.
- *
+/*
  * This is required only for the V2 bindings, and it enables a platform to
  * specify the extn to be used for certain property names. The properties to
  * which the extension will apply are opp-microvolt and opp-microamp. OPP core
@@ -2131,14 +2167,6 @@ static int _opp_set_prop_name(struct opp_table *opp_table, const char *name)
 	return 0;
 }
 
-/**
- * _opp_put_prop_name() - Releases resources blocked for prop-name
- * @opp_table: OPP table returned by _opp_set_prop_name().
- *
- * This is required only for the V2 bindings, and is called for a matching
- * _opp_set_prop_name(). Until this is called, the opp_table structure
- * will not be freed.
- */
 static void _opp_put_prop_name(struct opp_table *opp_table)
 {
 	if (opp_table->prop_name) {
@@ -2147,12 +2175,7 @@ static void _opp_put_prop_name(struct opp_table *opp_table)
 	}
 }
 
-/**
- * _opp_set_regulators() - Set regulator names for the device
- * @dev: Device for which regulator name is being set.
- * @names: Array of pointers to the names of the regulator.
- * @count: Number of regulators.
- *
+/*
  * In order to support OPP switching, OPP layer needs to know the name of the
  * device's regulators, as the core would be required to switch voltages as
  * well.
@@ -2214,10 +2237,6 @@ free_regulators:
 	return ret;
 }
 
-/**
- * _opp_put_regulators() - Releases resources blocked for regulator
- * @opp_table: OPP table returned from _opp_set_regulators().
- */
 static void _opp_put_regulators(struct opp_table *opp_table)
 {
 	int i;
@@ -2249,11 +2268,7 @@ static void _put_clks(struct opp_table *opp_table, int count)
 	opp_table->clks = NULL;
 }
 
-/**
- * _opp_set_clknames() - Set clk names for the device
- * @dev: Device for which clk names is being set.
- * @names: Clk names.
- *
+/*
  * In order to support OPP switching, OPP layer needs to get pointers to the
  * clocks for the device. Simple cases work fine without using this routine
  * (i.e. by passing connection-id as NULL), but for a device with multiple
@@ -2337,10 +2352,6 @@ free_clks:
 	return ret;
 }
 
-/**
- * _opp_put_clknames() - Releases resources blocked for clks.
- * @opp_table: OPP table returned from _opp_set_clknames().
- */
 static void _opp_put_clknames(struct opp_table *opp_table)
 {
 	if (!opp_table->clks)
@@ -2352,11 +2363,7 @@ static void _opp_put_clknames(struct opp_table *opp_table)
 	_put_clks(opp_table, opp_table->clk_count);
 }
 
-/**
- * _opp_set_config_regulators_helper() - Register custom set regulator helper.
- * @dev: Device for which the helper is getting registered.
- * @config_regulators: Custom set regulator helper.
- *
+/*
  * This is useful to support platforms with multiple regulators per device.
  *
  * This must be called before any OPPs are initialized for the device.
@@ -2371,20 +2378,13 @@ static int _opp_set_config_regulators_helper(struct opp_table *opp_table,
 	return 0;
 }
 
-/**
- * _opp_put_config_regulators_helper() - Releases resources blocked for
- *					 config_regulators helper.
- * @opp_table: OPP table returned from _opp_set_config_regulators_helper().
- *
- * Release resources blocked for platform specific config_regulators helper.
- */
 static void _opp_put_config_regulators_helper(struct opp_table *opp_table)
 {
 	if (opp_table->config_regulators)
 		opp_table->config_regulators = NULL;
 }
 
-static void _detach_genpd(struct opp_table *opp_table)
+static void _opp_detach_genpd(struct opp_table *opp_table)
 {
 	int index;
 
@@ -2403,12 +2403,7 @@ static void _detach_genpd(struct opp_table *opp_table)
 	opp_table->genpd_virt_devs = NULL;
 }
 
-/**
- * _opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer
- * @dev: Consumer device for which the genpd is getting attached.
- * @names: Null terminated array of pointers containing names of genpd to attach.
- * @virt_devs: Pointer to return the array of virtual devices.
- *
+/*
  * Multiple generic power domains for a device are supported with the help of
  * virtual genpd devices, which are created for each consumer device - genpd
  * pair. These are the device structures which are attached to the power domain
@@ -2435,21 +2430,11 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
 	if (opp_table->genpd_virt_devs)
 		return 0;
 
-	/*
-	 * If the genpd's OPP table isn't already initialized, parsing of the
-	 * required-opps fail for dev. We should retry this after genpd's OPP
-	 * table is added.
-	 */
-	if (!opp_table->required_opp_count)
-		return -EPROBE_DEFER;
-
-	mutex_lock(&opp_table->genpd_virt_dev_lock);
-
 	opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
 					     sizeof(*opp_table->genpd_virt_devs),
 					     GFP_KERNEL);
 	if (!opp_table->genpd_virt_devs)
-		goto unlock;
+		return -ENOMEM;
 
 	while (*name) {
 		if (index >= opp_table->required_opp_count) {
@@ -2472,36 +2457,15 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
 
 	if (virt_devs)
 		*virt_devs = opp_table->genpd_virt_devs;
-	mutex_unlock(&opp_table->genpd_virt_dev_lock);
 
 	return 0;
 
 err:
-	_detach_genpd(opp_table);
-unlock:
-	mutex_unlock(&opp_table->genpd_virt_dev_lock);
+	_opp_detach_genpd(opp_table);
 	return ret;
 
 }
 
-/**
- * _opp_detach_genpd() - Detach genpd(s) from the device.
- * @opp_table: OPP table returned by _opp_attach_genpd().
- *
- * This detaches the genpd(s), resets the virtual device pointers, and puts the
- * OPP table.
- */
-static void _opp_detach_genpd(struct opp_table *opp_table)
-{
-	/*
-	 * Acquire genpd_virt_dev_lock to make sure virt_dev isn't getting
-	 * used in parallel.
-	 */
-	mutex_lock(&opp_table->genpd_virt_dev_lock);
-	_detach_genpd(opp_table);
-	mutex_unlock(&opp_table->genpd_virt_dev_lock);
-}
-
 static void _opp_clear_config(struct opp_config_data *data)
 {
 	if (data->flags & OPP_CONFIG_GENPD)
@@ -2642,7 +2606,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_config);
 
 /**
  * dev_pm_opp_clear_config() - Releases resources blocked for OPP configuration.
- * @opp_table: OPP table returned from dev_pm_opp_set_config().
+ * @token: The token returned by dev_pm_opp_set_config() previously.
  *
  * This allows all device OPP configurations to be cleared at once. This must be
  * called once for each call made to dev_pm_opp_set_config(), in order to free
@@ -2825,10 +2789,9 @@ unlock:
 }
 
 /**
- * dev_pm_opp_add()  - Add an OPP table from a table definitions
- * @dev:	device for which we do this operation
- * @freq:	Frequency in Hz for this OPP
- * @u_volt:	Voltage in uVolts for this OPP
+ * dev_pm_opp_add_dynamic()  - Add an OPP table from a table definitions
+ * @dev:	The device for which we do this operation
+ * @data:	The OPP data for the OPP to add
  *
  * This function adds an opp definition to the opp table and returns status.
  * The opp is made available by default and it can be controlled using
@@ -2841,7 +2804,7 @@ unlock:
  *		Duplicate OPPs (both freq and volt are same) and !opp->available
  * -ENOMEM	Memory allocation failure
  */
-int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
+int dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *data)
 {
 	struct opp_table *opp_table;
 	int ret;
@@ -2853,13 +2816,13 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 	/* Fix regulator count for dynamic OPPs */
 	opp_table->regulator_count = 1;
 
-	ret = _opp_add_v1(opp_table, dev, freq, u_volt, true);
+	ret = _opp_add_v1(opp_table, dev, data, true);
 	if (ret)
 		dev_pm_opp_put_opp_table(opp_table);
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(dev_pm_opp_add);
+EXPORT_SYMBOL_GPL(dev_pm_opp_add_dynamic);
 
 /**
  * _opp_set_availability() - helper to set the availability of an opp

drivers/opp/debugfs.c

@@ -56,7 +56,7 @@ static void opp_debug_create_bw(struct dev_pm_opp *opp,
 				struct dentry *pdentry)
 {
 	struct dentry *d;
-	char name[11];
+	char name[20];
 	int i;
 
 	for (i = 0; i < opp_table->path_count; i++) {

drivers/opp/of.c

@@ -208,9 +208,9 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
 		mutex_lock(&opp_table_lock);
 		list_add(&opp_table->lazy, &lazy_opp_tables);
 		mutex_unlock(&opp_table_lock);
-	}
-	else
+	} else {
 		_update_set_required_opps(opp_table);
+	}
 
 	goto put_np;
 
@@ -296,24 +296,41 @@ void _of_clear_opp(struct opp_table *opp_table, struct dev_pm_opp *opp)
 	of_node_put(opp->np);
 }
 
+static int _link_required_opps(struct dev_pm_opp *opp,
+			       struct opp_table *required_table, int index)
+{
+	struct device_node *np;
+
+	np = of_parse_required_opp(opp->np, index);
+	if (unlikely(!np))
+		return -ENODEV;
+
+	opp->required_opps[index] = _find_opp_of_np(required_table, np);
+	of_node_put(np);
+
+	if (!opp->required_opps[index]) {
+		pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
+		       __func__, opp->np, index);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
 /* Populate all required OPPs which are part of "required-opps" list */
 static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
 				       struct dev_pm_opp *opp)
 {
-	struct dev_pm_opp **required_opps;
 	struct opp_table *required_table;
-	struct device_node *np;
 	int i, ret, count = opp_table->required_opp_count;
 
 	if (!count)
 		return 0;
 
-	required_opps = kcalloc(count, sizeof(*required_opps), GFP_KERNEL);
-	if (!required_opps)
+	opp->required_opps = kcalloc(count, sizeof(*opp->required_opps), GFP_KERNEL);
+	if (!opp->required_opps)
 		return -ENOMEM;
 
-	opp->required_opps = required_opps;
-
 	for (i = 0; i < count; i++) {
 		required_table = opp_table->required_opp_tables[i];
 
@@ -321,21 +338,9 @@ static int _of_opp_alloc_required_opps(struct opp_table *opp_table,
 		if (IS_ERR_OR_NULL(required_table))
 			continue;
 
-		np = of_parse_required_opp(opp->np, i);
-		if (unlikely(!np)) {
-			ret = -ENODEV;
+		ret = _link_required_opps(opp, required_table, i);
+		if (ret)
 			goto free_required_opps;
-		}
-
-		required_opps[i] = _find_opp_of_np(required_table, np);
-		of_node_put(np);
-
-		if (!required_opps[i]) {
-			pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
-			       __func__, opp->np, i);
-			ret = -ENODEV;
-			goto free_required_opps;
-		}
 	}
 
 	return 0;
@@ -350,22 +355,13 @@ free_required_opps:
 static int lazy_link_required_opps(struct opp_table *opp_table,
 				   struct opp_table *new_table, int index)
 {
-	struct device_node *required_np;
 	struct dev_pm_opp *opp;
+	int ret;
 
 	list_for_each_entry(opp, &opp_table->opp_list, node) {
-		required_np = of_parse_required_opp(opp->np, index);
-		if (unlikely(!required_np))
-			return -ENODEV;
-
-		opp->required_opps[index] = _find_opp_of_np(new_table, required_np);
-		of_node_put(required_np);
-
-		if (!opp->required_opps[index]) {
-			pr_err("%s: Unable to find required OPP node: %pOF (%d)\n",
-			       __func__, opp->np, index);
-			return -ENODEV;
-		}
+		ret = _link_required_opps(opp, new_table, index);
+		if (ret)
+			return ret;
 	}
 
 	return 0;
@@ -1079,11 +1075,15 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
 	while (nr) {
 		unsigned long freq = be32_to_cpup(val++) * 1000;
 		unsigned long volt = be32_to_cpup(val++);
+		struct dev_pm_opp_data data = {
+			.freq = freq,
+			.u_volt = volt,
+		};
 
-		ret = _opp_add_v1(opp_table, dev, freq, volt, false);
+		ret = _opp_add_v1(opp_table, dev, &data, false);
 		if (ret) {
 			dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
-				__func__, freq, ret);
+				__func__, data.freq, ret);
 			goto remove_static_opp;
 		}
 		nr -= 2;

drivers/opp/opp.h

@@ -160,7 +160,6 @@ enum opp_table_access {
  * @rate_clk_single: Currently configured frequency for single clk.
  * @current_opp: Currently configured OPP for the table.
  * @suspend_opp: Pointer to OPP to be used during device suspend.
- * @genpd_virt_dev_lock: Mutex protecting the genpd virtual device pointers.
  * @genpd_virt_devs: List of virtual devices for multiple genpd support.
  * @required_opp_tables: List of device OPP tables that are required by OPPs in
  *		this table.
@@ -212,7 +211,6 @@ struct opp_table {
 	struct dev_pm_opp *current_opp;
 	struct dev_pm_opp *suspend_opp;
 
-	struct mutex genpd_virt_dev_lock;
 	struct device **genpd_virt_devs;
 	struct opp_table **required_opp_tables;
 	unsigned int required_opp_count;
@@ -251,7 +249,7 @@ struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);
 void _opp_free(struct dev_pm_opp *opp);
 int _opp_compare_key(struct opp_table *opp_table, struct dev_pm_opp *opp1, struct dev_pm_opp *opp2);
 int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
-int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
+int _opp_add_v1(struct opp_table *opp_table, struct device *dev, struct dev_pm_opp_data *data, bool dynamic);
 void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, int last_cpu);
 struct opp_table *_add_opp_table_indexed(struct device *dev, int index, bool getclk);
 void _put_opp_list_kref(struct opp_table *opp_table);

drivers/powercap/intel_rapl_common.c

@@ -892,7 +892,7 @@ static int rapl_write_pl_data(struct rapl_domain *rd, int pl,
 		return -EINVAL;
 
 	if (rd->rpl[pl].locked) {
-		pr_warn("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl]);
+		pr_debug("%s:%s:%s locked by BIOS\n", rd->rp->name, rd->name, pl_names[pl]);
 		return -EACCES;
 	}
 

include/linux/cpufreq.h

@@ -1193,14 +1193,6 @@ static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_
 }
 #endif
 
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
-void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
-			struct cpufreq_governor *old_gov);
-#else
-static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
-			struct cpufreq_governor *old_gov) { }
-#endif
-
 extern unsigned int arch_freq_get_on_cpu(int cpu);
 
 #ifndef arch_set_freq_scale

include/linux/pm.h

@@ -374,24 +374,39 @@ const struct dev_pm_ops name = { \
 	RUNTIME_PM_OPS(runtime_suspend_fn, runtime_resume_fn, idle_fn) \
 }
 
-#ifdef CONFIG_PM
-#define _EXPORT_DEV_PM_OPS(name, license, ns)				\
+#define _EXPORT_PM_OPS(name, license, ns)				\
 	const struct dev_pm_ops name;					\
 	__EXPORT_SYMBOL(name, license, ns);				\
 	const struct dev_pm_ops name
-#define EXPORT_PM_FN_GPL(name)		EXPORT_SYMBOL_GPL(name)
-#define EXPORT_PM_FN_NS_GPL(name, ns)	EXPORT_SYMBOL_NS_GPL(name, ns)
-#else
-#define _EXPORT_DEV_PM_OPS(name, license, ns)				\
+
+#define _DISCARD_PM_OPS(name, license, ns)				\
 	static __maybe_unused const struct dev_pm_ops __static_##name
+
+#ifdef CONFIG_PM
+#define _EXPORT_DEV_PM_OPS(name, license, ns)		_EXPORT_PM_OPS(name, license, ns)
+#define EXPORT_PM_FN_GPL(name)				EXPORT_SYMBOL_GPL(name)
+#define EXPORT_PM_FN_NS_GPL(name, ns)			EXPORT_SYMBOL_NS_GPL(name, ns)
+#else
+#define _EXPORT_DEV_PM_OPS(name, license, ns)		_DISCARD_PM_OPS(name, license, ns)
 #define EXPORT_PM_FN_GPL(name)
 #define EXPORT_PM_FN_NS_GPL(name, ns)
 #endif
 
-#define EXPORT_DEV_PM_OPS(name) _EXPORT_DEV_PM_OPS(name, "", "")
-#define EXPORT_GPL_DEV_PM_OPS(name) _EXPORT_DEV_PM_OPS(name, "GPL", "")
-#define EXPORT_NS_DEV_PM_OPS(name, ns) _EXPORT_DEV_PM_OPS(name, "", #ns)
-#define EXPORT_NS_GPL_DEV_PM_OPS(name, ns) _EXPORT_DEV_PM_OPS(name, "GPL", #ns)
+#ifdef CONFIG_PM_SLEEP
+#define _EXPORT_DEV_SLEEP_PM_OPS(name, license, ns)	_EXPORT_PM_OPS(name, license, ns)
+#else
+#define _EXPORT_DEV_SLEEP_PM_OPS(name, license, ns)	_DISCARD_PM_OPS(name, license, ns)
+#endif
+
+#define EXPORT_DEV_PM_OPS(name)				_EXPORT_DEV_PM_OPS(name, "", "")
+#define EXPORT_GPL_DEV_PM_OPS(name)			_EXPORT_DEV_PM_OPS(name, "GPL", "")
+#define EXPORT_NS_DEV_PM_OPS(name, ns)			_EXPORT_DEV_PM_OPS(name, "", #ns)
+#define EXPORT_NS_GPL_DEV_PM_OPS(name, ns)		_EXPORT_DEV_PM_OPS(name, "GPL", #ns)
+
+#define EXPORT_DEV_SLEEP_PM_OPS(name)			_EXPORT_DEV_SLEEP_PM_OPS(name, "", "")
+#define EXPORT_GPL_DEV_SLEEP_PM_OPS(name)		_EXPORT_DEV_SLEEP_PM_OPS(name, "GPL", "")
+#define EXPORT_NS_DEV_SLEEP_PM_OPS(name, ns)		_EXPORT_DEV_SLEEP_PM_OPS(name, "", #ns)
+#define EXPORT_NS_GPL_DEV_SLEEP_PM_OPS(name, ns)	_EXPORT_DEV_SLEEP_PM_OPS(name, "GPL", #ns)
 
 /*
  * Use this if you want to use the same suspend and resume callbacks for suspend
@@ -404,19 +419,19 @@ const struct dev_pm_ops name = { \
 	_DEFINE_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL)
 
 #define EXPORT_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
-	EXPORT_DEV_PM_OPS(name) = { \
+	EXPORT_DEV_SLEEP_PM_OPS(name) = { \
 		SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
 	}
 #define EXPORT_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
-	EXPORT_GPL_DEV_PM_OPS(name) = { \
+	EXPORT_GPL_DEV_SLEEP_PM_OPS(name) = { \
 		SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
 	}
 #define EXPORT_NS_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn, ns)	\
-	EXPORT_NS_DEV_PM_OPS(name, ns) = { \
+	EXPORT_NS_DEV_SLEEP_PM_OPS(name, ns) = { \
 		SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
 	}
 #define EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn, ns)	\
-	EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
+	EXPORT_NS_GPL_DEV_SLEEP_PM_OPS(name, ns) = { \
 		SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
 	}
 
@@ -719,6 +734,7 @@ extern void dev_pm_put_subsys_data(struct device *dev);
  * @activate: Called before executing probe routines for bus types and drivers.
  * @sync: Called after successful driver probe.
  * @dismiss: Called after unsuccessful driver probe and after driver removal.
+ * @set_performance_state: Called to request a new performance state.
  *
  * Power domains provide callbacks that are executed during system suspend,
  * hibernation, system resume and during runtime PM transitions instead of
@@ -731,6 +747,7 @@ struct dev_pm_domain {
 	int (*activate)(struct device *dev);
 	void (*sync)(struct device *dev);
 	void (*dismiss)(struct device *dev);
+	int (*set_performance_state)(struct device *dev, unsigned int state);
 };
 
 /*

include/linux/pm_domain.h

@@ -430,6 +430,7 @@ struct device *dev_pm_domain_attach_by_name(struct device *dev,
 void dev_pm_domain_detach(struct device *dev, bool power_off);
 int dev_pm_domain_start(struct device *dev);
 void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
+int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state);
 #else
 static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
 {
@@ -452,6 +453,11 @@ static inline int dev_pm_domain_start(struct device *dev)
 }
 static inline void dev_pm_domain_set(struct device *dev,
 				     struct dev_pm_domain *pd) {}
+static inline int dev_pm_domain_set_performance_state(struct device *dev,
+						      unsigned int state)
+{
+	return 0;
+}
 #endif
 
 #endif /* _LINUX_PM_DOMAIN_H */

include/linux/pm_opp.h

@@ -92,6 +92,18 @@ struct dev_pm_opp_config {
 	struct device ***virt_devs;
 };
 
+/**
+ * struct dev_pm_opp_data - The data to use to initialize an OPP.
+ * @level: The performance level for the OPP.
+ * @freq: The clock rate in Hz for the OPP.
+ * @u_volt: The voltage in uV for the OPP.
+ */
+struct dev_pm_opp_data {
+	unsigned int level;
+	unsigned long freq;
+	unsigned long u_volt;
+};
+
 #if defined(CONFIG_PM_OPP)
 
 struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
@@ -144,6 +156,9 @@ struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
 struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 					      unsigned int *level);
 
+struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
+					       unsigned long *level);
+
 struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
 					   unsigned int *bw, int index);
 
@@ -152,8 +167,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
 
 void dev_pm_opp_put(struct dev_pm_opp *opp);
 
-int dev_pm_opp_add(struct device *dev, unsigned long freq,
-		   unsigned long u_volt);
+int dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *opp);
+
 void dev_pm_opp_remove(struct device *dev, unsigned long freq);
 void dev_pm_opp_remove_all_dynamic(struct device *dev);
 
@@ -308,6 +323,12 @@ static inline struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 	return ERR_PTR(-EOPNOTSUPP);
 }
 
+static inline struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev,
+							     unsigned long *level)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
 static inline struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
 					unsigned int *bw, int index)
 {
@@ -322,8 +343,8 @@ static inline struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
 
 static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
 
-static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
-					unsigned long u_volt)
+static inline int
+dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *opp)
 {
 	return -EOPNOTSUPP;
 }
@@ -519,6 +540,17 @@ static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_ta
 
 /* OPP Configuration helpers */
 
+static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
+				 unsigned long u_volt)
+{
+	struct dev_pm_opp_data data = {
+		.freq = freq,
+		.u_volt = u_volt,
+	};
+
+	return dev_pm_opp_add_dynamic(dev, &data);
+}
+
 /* Regulators helpers */
 static inline int dev_pm_opp_set_regulators(struct device *dev,
 					    const char * const names[])

include/soc/rockchip/rk3399_grf.h

@@ -11,11 +11,8 @@
 
 /* PMU GRF Registers */
 #define RK3399_PMUGRF_OS_REG2		0x308
-#define RK3399_PMUGRF_DDRTYPE_SHIFT	13
-#define RK3399_PMUGRF_DDRTYPE_MASK	7
-#define RK3399_PMUGRF_DDRTYPE_DDR3	3
-#define RK3399_PMUGRF_DDRTYPE_LPDDR2	5
-#define RK3399_PMUGRF_DDRTYPE_LPDDR3	6
-#define RK3399_PMUGRF_DDRTYPE_LPDDR4	7
+#define RK3399_PMUGRF_OS_REG2_DDRTYPE		GENMASK(15, 13)
+#define RK3399_PMUGRF_OS_REG2_BW_CH0		GENMASK(3, 2)
+#define RK3399_PMUGRF_OS_REG2_BW_CH1		GENMASK(19, 18)
 
 #endif

include/soc/rockchip/rk3568_grf.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __SOC_RK3568_GRF_H
+#define __SOC_RK3568_GRF_H
+
+#define RK3568_PMUGRF_OS_REG2		0x208
+#define RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
+#define RK3568_PMUGRF_OS_REG2_BW_CH0			GENMASK(3, 2)
+
+#define RK3568_PMUGRF_OS_REG3		0x20c
+#define RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13, 12)
+#define RK3568_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
+
+#endif /* __SOC_RK3568_GRF_H */

include/soc/rockchip/rk3588_grf.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __SOC_RK3588_GRF_H
+#define __SOC_RK3588_GRF_H
+
+#define RK3588_PMUGRF_OS_REG2		0x208
+#define RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
+#define RK3588_PMUGRF_OS_REG2_BW_CH0			GENMASK(3, 2)
+#define RK3588_PMUGRF_OS_REG2_BW_CH1                    GENMASK(19, 18)
+#define RK3588_PMUGRF_OS_REG2_CH_INFO                   GENMASK(29, 28)
+
+#define RK3588_PMUGRF_OS_REG3		0x20c
+#define RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13, 12)
+#define RK3588_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
+
+#define RK3588_PMUGRF_OS_REG4           0x210
+#define RK3588_PMUGRF_OS_REG5           0x214
+
+#endif /* __SOC_RK3588_GRF_H */

include/soc/rockchip/rockchip_grf.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Rockchip General Register Files definitions
+ */
+
+#ifndef __SOC_ROCKCHIP_GRF_H
+#define __SOC_ROCKCHIP_GRF_H
+
+/* Rockchip DDRTYPE defines */
+enum {
+	ROCKCHIP_DDRTYPE_DDR3	= 3,
+	ROCKCHIP_DDRTYPE_LPDDR2	= 5,
+	ROCKCHIP_DDRTYPE_LPDDR3	= 6,
+	ROCKCHIP_DDRTYPE_LPDDR4	= 7,
+	ROCKCHIP_DDRTYPE_LPDDR4X = 8,
+};
+
+#endif /* __SOC_ROCKCHIP_GRF_H */

kernel/power/snapshot.c

@@ -2545,8 +2545,9 @@ static void *get_highmem_page_buffer(struct page *page,
 		pbe->copy_page = tmp;
 	} else {
 		/* Copy of the page will be stored in normal memory */
-		kaddr = safe_pages_list;
-		safe_pages_list = safe_pages_list->next;
+		kaddr = __get_safe_page(ca->gfp_mask);
+		if (!kaddr)
+			return ERR_PTR(-ENOMEM);
 		pbe->copy_page = virt_to_page(kaddr);
 	}
 	pbe->next = highmem_pblist;
@@ -2750,8 +2751,9 @@ static void *get_buffer(struct memory_bitmap *bm, struct chain_allocator *ca)
 		return ERR_PTR(-ENOMEM);
 	}
 	pbe->orig_address = page_address(page);
-	pbe->address = safe_pages_list;
-	safe_pages_list = safe_pages_list->next;
+	pbe->address = __get_safe_page(ca->gfp_mask);
+	if (!pbe->address)
+		return ERR_PTR(-ENOMEM);
 	pbe->next = restore_pblist;
 	restore_pblist = pbe;
 	return pbe->address;
@@ -2783,8 +2785,6 @@ next:
 	if (handle->cur > 1 && handle->cur > nr_meta_pages + nr_copy_pages + nr_zero_pages)
 		return 0;
 
-	handle->sync_read = 1;
-
 	if (!handle->cur) {
 		if (!buffer)
 			/* This makes the buffer be freed by swsusp_free() */
@@ -2827,7 +2827,6 @@ next:
 			memory_bm_position_reset(&zero_bm);
 			restore_pblist = NULL;
 			handle->buffer = get_buffer(&orig_bm, &ca);
-			handle->sync_read = 0;
 			if (IS_ERR(handle->buffer))
 				return PTR_ERR(handle->buffer);
 		}
@@ -2837,9 +2836,8 @@ next:
 		handle->buffer = get_buffer(&orig_bm, &ca);
 		if (IS_ERR(handle->buffer))
 			return PTR_ERR(handle->buffer);
-		if (handle->buffer != buffer)
-			handle->sync_read = 0;
 	}
+	handle->sync_read = (handle->buffer == buffer);
 	handle->cur++;
 
 	/* Zero pages were not included in the image, memset it and move on. */

kernel/power/swap.c

@@ -1514,7 +1514,7 @@ end:
 static void *swsusp_holder;
 
 /**
- * swsusp_check - Check for swsusp signature in the resume device
+ * swsusp_check - Open the resume device and check for the swsusp signature.
  * @exclusive: Open the resume device exclusively.
  */
 
@@ -1565,7 +1565,7 @@ put:
 }
 
 /**
- * swsusp_close - close swap device.
+ * swsusp_close - close resume device.
  * @exclusive: Close the resume device which is exclusively opened.
  */
 

kernel/sched/cpufreq_schedutil.c

@@ -556,6 +556,31 @@ static const struct kobj_type sugov_tunables_ktype = {
 
 /********************** cpufreq governor interface *********************/
 
+#ifdef CONFIG_ENERGY_MODEL
+static void rebuild_sd_workfn(struct work_struct *work)
+{
+	rebuild_sched_domains_energy();
+}
+
+static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn);
+
+/*
+ * EAS shouldn't be attempted without sugov, so rebuild the sched_domains
+ * on governor changes to make sure the scheduler knows about it.
+ */
+static void sugov_eas_rebuild_sd(void)
+{
+	/*
+	 * When called from the cpufreq_register_driver() path, the
+	 * cpu_hotplug_lock is already held, so use a work item to
+	 * avoid nested locking in rebuild_sched_domains().
+	 */
+	schedule_work(&rebuild_sd_work);
+}
+#else
+static inline void sugov_eas_rebuild_sd(void) { };
+#endif
+
 struct cpufreq_governor schedutil_gov;
 
 static struct sugov_policy *sugov_policy_alloc(struct cpufreq_policy *policy)
@@ -710,6 +735,8 @@ static int sugov_init(struct cpufreq_policy *policy)
 	if (ret)
 		goto fail;
 
+	sugov_eas_rebuild_sd();
+
 out:
 	mutex_unlock(&global_tunables_lock);
 	return 0;
@@ -751,6 +778,8 @@ static void sugov_exit(struct cpufreq_policy *policy)
 	sugov_kthread_stop(sg_policy);
 	sugov_policy_free(sg_policy);
 	cpufreq_disable_fast_switch(policy);
+
+	sugov_eas_rebuild_sd();
 }
 
 static int sugov_start(struct cpufreq_policy *policy)
@@ -768,14 +797,6 @@ static int sugov_start(struct cpufreq_policy *policy)
 
 	sg_policy->need_freq_update = cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS);
 
-	for_each_cpu(cpu, policy->cpus) {
-		struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
-
-		memset(sg_cpu, 0, sizeof(*sg_cpu));
-		sg_cpu->cpu			= cpu;
-		sg_cpu->sg_policy		= sg_policy;
-	}
-
 	if (policy_is_shared(policy))
 		uu = sugov_update_shared;
 	else if (policy->fast_switch_enabled && cpufreq_driver_has_adjust_perf())
@@ -786,6 +807,9 @@ static int sugov_start(struct cpufreq_policy *policy)
 	for_each_cpu(cpu, policy->cpus) {
 		struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
 
+		memset(sg_cpu, 0, sizeof(*sg_cpu));
+		sg_cpu->cpu = cpu;
+		sg_cpu->sg_policy = sg_policy;
 		cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util, uu);
 	}
 	return 0;
@@ -839,29 +863,3 @@ struct cpufreq_governor *cpufreq_default_governor(void)
 #endif
 
 cpufreq_governor_init(schedutil_gov);
-
-#ifdef CONFIG_ENERGY_MODEL
-static void rebuild_sd_workfn(struct work_struct *work)
-{
-	rebuild_sched_domains_energy();
-}
-static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn);
-
-/*
- * EAS shouldn't be attempted without sugov, so rebuild the sched_domains
- * on governor changes to make sure the scheduler knows about it.
- */
-void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
-				  struct cpufreq_governor *old_gov)
-{
-	if (old_gov == &schedutil_gov || policy->governor == &schedutil_gov) {
-		/*
-		 * When called from the cpufreq_register_driver() path, the
-		 * cpu_hotplug_lock is already held, so use a work item to
-		 * avoid nested locking in rebuild_sched_domains().
-		 */
-		schedule_work(&rebuild_sd_work);
-	}
-
-}
-#endif

tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0-only
 # -*- coding: utf-8 -*-
 #
@@ -11,11 +11,11 @@ then this utility enables and collects trace data for a user specified interval
 and generates performance plots.
 
 Prerequisites:
-    Python version 2.7.x or higher
+    Python version 3.6.x or higher
     gnuplot 5.0 or higher
-    gnuplot-py 1.8 or higher
+    python3-gnuplot 1.8 or higher
     (Most of the distributions have these required packages. They may be called
-     gnuplot-py, phython-gnuplot or phython3-gnuplot, gnuplot-nox, ... )
+     gnuplot-py, python-gnuplot or python3-gnuplot, gnuplot-nox, ... )
 
     HWP (Hardware P-States are disabled)
     Kernel config for Linux trace is enabled
@@ -23,7 +23,7 @@ Prerequisites:
     see print_help(): for Usage and Output details
 
 """
-from __future__ import print_function
+
 from datetime import datetime
 import subprocess
 import os
@@ -562,7 +562,7 @@ if __name__ == "__main__":
 
     # Temporary (or perhaps not)
     cur_version = sys.version_info
-    print('python version (should be >= 2.7):')
+    print('python version (should be >= 3.6):')
     print(cur_version)
 
     # Left as "cleanup" for potential future re-run ability.