Merge branch 'pm-cpufreq'

Merge cpufreq updates for 6.4-rc1:

 - Fix the frequency unit in cpufreq_verify_current_freq checks()
   (Sanjay Chandrashekara).

 - Make mode_state_machine in amd-pstate static (Tom Rix).

 - Make the cpufreq core require drivers with target_index() to set
   freq_table (Viresh Kumar).

 - Fix typo in the ARM_BRCMSTB_AVS_CPUFREQ Kconfig entry (Jingyu Wang).

 - Use of_property_read_bool() for boolean properties in the pmac32
   cpufreq driver (Rob Herring).

 - Make the cpufreq sysfs interface return proper error codes on
   obviously invalid input (qinyu).

 - Add guided autonomous mode support to the AMD P-state driver (Wyes
   Karny).

 - Make the Intel P-state driver enable HWP IO boost on all server
   platforms (Srinivas Pandruvada).

 - Add opp and bandwidth support to tegra194 cpufreq driver (Sumit
   Gupta).

 - Use of_property_present() for testing DT property presence (Rob
   Herring).

 - Remove MODULE_LICENSE in non-modules (Nick Alcock).

 - Add SM7225 to cpufreq-dt-platdev blocklist (Luca Weiss).

 - Optimizations and fixes for qcom-cpufreq-hw driver (Krzysztof
   Kozlowski, Konrad Dybcio, and Bjorn Andersson).

 - DT binding updates for qcom-cpufreq-hw driver (Konrad Dybcio and
   Bartosz Golaszewski).

 - Updates and fixes for mediatek driver (Jia-Wei Chang and
   AngeloGioacchino Del Regno).

* pm-cpufreq: (29 commits)
  cpufreq: use correct unit when verify cur freq
  cpufreq: tegra194: add OPP support and set bandwidth
  cpufreq: amd-pstate: Make varaiable mode_state_machine static
  cpufreq: drivers with target_index() must set freq_table
  cpufreq: qcom-cpufreq-hw: Revert adding cpufreq qos
  dt-bindings: cpufreq: cpufreq-qcom-hw: Add QCM2290
  dt-bindings: cpufreq: cpufreq-qcom-hw: Sanitize data per compatible
  dt-bindings: cpufreq: cpufreq-qcom-hw: Allow just 1 frequency domain
  cpufreq: Add SM7225 to cpufreq-dt-platdev blocklist
  cpufreq: qcom-cpufreq-hw: fix double IO unmap and resource release on exit
  cpufreq: mediatek: Raise proc and sram max voltage for MT7622/7623
  cpufreq: mediatek: raise proc/sram max voltage for MT8516
  cpufreq: mediatek: fix KP caused by handler usage after regulator_put/clk_put
  cpufreq: mediatek: fix passing zero to 'PTR_ERR'
  cpufreq: pmac32: Use of_property_read_bool() for boolean properties
  cpufreq: Fix typo in the ARM_BRCMSTB_AVS_CPUFREQ Kconfig entry
  cpufreq: warn about invalid vals to scaling_max/min_freq interfaces
  Documentation: cpufreq: amd-pstate: Update amd_pstate status sysfs for guided
  cpufreq: amd-pstate: Add guided mode control support via sysfs
  cpufreq: amd-pstate: Add guided autonomous mode
  ...

Documentation/admin-guide/kernel-parameters.txt

@@ -339,6 +339,29 @@
 			             This mode requires kvm-amd.avic=1.
 			             (Default when IOMMU HW support is present.)
 
+	amd_pstate=	[X86]
+			disable
+			  Do not enable amd_pstate as the default
+			  scaling driver for the supported processors
+			passive
+			  Use amd_pstate with passive mode as a scaling driver.
+			  In this mode autonomous selection is disabled.
+			  Driver requests a desired performance level and platform
+			  tries to match the same performance level if it is
+			  satisfied by guaranteed performance level.
+			active
+			  Use amd_pstate_epp driver instance as the scaling driver,
+			  driver provides a hint to the hardware if software wants
+			  to bias toward performance (0x0) or energy efficiency (0xff)
+			  to the CPPC firmware. then CPPC power algorithm will
+			  calculate the runtime workload and adjust the realtime cores
+			  frequency.
+			guided
+			  Activate guided autonomous mode. Driver requests minimum and
+			  maximum performance level and the platform autonomously
+			  selects a performance level in this range and appropriate
+			  to the current workload.
+
 	amijoy.map=	[HW,JOY] Amiga joystick support
 			Map of devices attached to JOY0DAT and JOY1DAT
 			Format: <a>,<b>
@@ -7059,20 +7082,3 @@
 				xmon commands.
 			off	xmon is disabled.
 
-	amd_pstate=	[X86]
-			disable
-			  Do not enable amd_pstate as the default
-			  scaling driver for the supported processors
-			passive
-			  Use amd_pstate as a scaling driver, driver requests a
-			  desired performance on this abstract scale and the power
-			  management firmware translates the requests into actual
-			  hardware states (core frequency, data fabric and memory
-			  clocks etc.)
-			active
-			  Use amd_pstate_epp driver instance as the scaling driver,
-			  driver provides a hint to the hardware if software wants
-			  to bias toward performance (0x0) or energy efficiency (0xff)
-			  to the CPPC firmware. then CPPC power algorithm will
-			  calculate the runtime workload and adjust the realtime cores
-			  frequency.

Documentation/admin-guide/pm/amd-pstate.rst

@@ -303,13 +303,18 @@ efficiency frequency management method on AMD processors.
 AMD Pstate Driver Operation Modes
 =================================
 
-``amd_pstate`` CPPC has two operation modes: CPPC Autonomous(active) mode and
-CPPC non-autonomous(passive) mode.
-active mode and passive mode can be chosen by different kernel parameters.
-When in Autonomous mode, CPPC ignores requests done in the Desired Performance
-Target register and takes into account only the values set to the Minimum requested
-performance, Maximum requested performance, and Energy Performance Preference
-registers. When Autonomous is disabled, it only considers the Desired Performance Target.
+``amd_pstate`` CPPC has 3 operation modes: autonomous (active) mode,
+non-autonomous (passive) mode and guided autonomous (guided) mode.
+Active/passive/guided mode can be chosen by different kernel parameters.
+
+- In autonomous mode, platform ignores the desired performance level request
+  and takes into account only the values set to the minimum, maximum and energy
+  performance preference registers.
+- In non-autonomous mode, platform gets desired performance level
+  from OS directly through Desired Performance Register.
+- In guided-autonomous mode, platform sets operating performance level
+  autonomously according to the current workload and within the limits set by
+  OS through min and max performance registers.
 
 Active Mode
 ------------
@@ -338,6 +343,15 @@ to the Performance Reduction Tolerance register. Above the nominal performance l
 processor must provide at least nominal performance requested and go higher if current
 operating conditions allow.
 
+Guided Mode
+-----------
+
+``amd_pstate=guided``
+
+If ``amd_pstate=guided`` is passed to kernel command line option then this mode
+is activated.  In this mode, driver requests minimum and maximum performance
+level and the platform autonomously selects a performance level in this range
+and appropriate to the current workload.
 
 User Space Interface in ``sysfs`` - General
 ===========================================
@@ -358,6 +372,9 @@ control its functionality at the system level.  They are located in the
 	"passive"
 		The driver is functional and in the ``passive mode``
 
+	"guided"
+		The driver is functional and in the ``guided mode``
+
 	"disable"
 		The driver is unregistered and not functional now.
 

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

@@ -20,12 +20,20 @@ properties:
     oneOf:
       - description: v1 of CPUFREQ HW
         items:
+          - enum:
+              - qcom,qcm2290-cpufreq-hw
+              - qcom,sc7180-cpufreq-hw
+              - qcom,sdm845-cpufreq-hw
+              - qcom,sm6115-cpufreq-hw
+              - qcom,sm6350-cpufreq-hw
+              - qcom,sm8150-cpufreq-hw
           - const: qcom,cpufreq-hw
 
       - description: v2 of CPUFREQ HW (EPSS)
         items:
           - enum:
               - qcom,qdu1000-cpufreq-epss
+              - qcom,sa8775p-cpufreq-epss
               - qcom,sc7280-cpufreq-epss
               - qcom,sc8280xp-cpufreq-epss
               - qcom,sm6375-cpufreq-epss
@@ -36,14 +44,14 @@ properties:
           - const: qcom,cpufreq-epss
 
   reg:
-    minItems: 2
+    minItems: 1
     items:
       - description: Frequency domain 0 register region
       - description: Frequency domain 1 register region
       - description: Frequency domain 2 register region
 
   reg-names:
-    minItems: 2
+    minItems: 1
     items:
       - const: freq-domain0
       - const: freq-domain1
@@ -85,6 +93,111 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,qcm2290-cpufreq-hw
+    then:
+      properties:
+        reg:
+          minItems: 1
+          maxItems: 1
+
+        reg-names:
+          minItems: 1
+          maxItems: 1
+
+        interrupts:
+          minItems: 1
+          maxItems: 1
+
+        interrupt-names:
+          minItems: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,qdu1000-cpufreq-epss
+              - qcom,sc7180-cpufreq-hw
+              - qcom,sc8280xp-cpufreq-epss
+              - qcom,sdm845-cpufreq-hw
+              - qcom,sm6115-cpufreq-hw
+              - qcom,sm6350-cpufreq-hw
+              - qcom,sm6375-cpufreq-epss
+    then:
+      properties:
+        reg:
+          minItems: 2
+          maxItems: 2
+
+        reg-names:
+          minItems: 2
+          maxItems: 2
+
+        interrupts:
+          minItems: 2
+          maxItems: 2
+
+        interrupt-names:
+          minItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sc7280-cpufreq-epss
+              - qcom,sm8250-cpufreq-epss
+              - qcom,sm8350-cpufreq-epss
+              - qcom,sm8450-cpufreq-epss
+              - qcom,sm8550-cpufreq-epss
+    then:
+      properties:
+        reg:
+          minItems: 3
+          maxItems: 3
+
+        reg-names:
+          minItems: 3
+          maxItems: 3
+
+        interrupts:
+          minItems: 3
+          maxItems: 3
+
+        interrupt-names:
+          minItems: 3
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,sm8150-cpufreq-hw
+    then:
+      properties:
+        reg:
+          minItems: 3
+          maxItems: 3
+
+        reg-names:
+          minItems: 3
+          maxItems: 3
+
+        # On some SoCs the Prime core shares the LMH irq with Big cores
+        interrupts:
+          minItems: 2
+          maxItems: 2
+
+        interrupt-names:
+          minItems: 2
+
+
 examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-sdm845.h>
@@ -235,7 +348,7 @@ examples:
       #size-cells = <1>;
 
       cpufreq@17d43000 {
-        compatible = "qcom,cpufreq-hw";
+        compatible = "qcom,sdm845-cpufreq-hw", "qcom,cpufreq-hw";
         reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>;
         reg-names = "freq-domain0", "freq-domain1";
 

drivers/acpi/cppc_acpi.c

@@ -1433,6 +1433,102 @@ int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable)
 }
 EXPORT_SYMBOL_GPL(cppc_set_epp_perf);
 
+/**
+ * cppc_get_auto_sel_caps - Read autonomous selection register.
+ * @cpunum : CPU from which to read register.
+ * @perf_caps : struct where autonomous selection register value is updated.
+ */
+int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps)
+{
+	struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpunum);
+	struct cpc_register_resource *auto_sel_reg;
+	u64  auto_sel;
+
+	if (!cpc_desc) {
+		pr_debug("No CPC descriptor for CPU:%d\n", cpunum);
+		return -ENODEV;
+	}
+
+	auto_sel_reg = &cpc_desc->cpc_regs[AUTO_SEL_ENABLE];
+
+	if (!CPC_SUPPORTED(auto_sel_reg))
+		pr_warn_once("Autonomous mode is not unsupported!\n");
+
+	if (CPC_IN_PCC(auto_sel_reg)) {
+		int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpunum);
+		struct cppc_pcc_data *pcc_ss_data = NULL;
+		int ret = 0;
+
+		if (pcc_ss_id < 0)
+			return -ENODEV;
+
+		pcc_ss_data = pcc_data[pcc_ss_id];
+
+		down_write(&pcc_ss_data->pcc_lock);
+
+		if (send_pcc_cmd(pcc_ss_id, CMD_READ) >= 0) {
+			cpc_read(cpunum, auto_sel_reg, &auto_sel);
+			perf_caps->auto_sel = (bool)auto_sel;
+		} else {
+			ret = -EIO;
+		}
+
+		up_write(&pcc_ss_data->pcc_lock);
+
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cppc_get_auto_sel_caps);
+
+/**
+ * cppc_set_auto_sel - Write autonomous selection register.
+ * @cpu    : CPU to which to write register.
+ * @enable : the desired value of autonomous selection resiter to be updated.
+ */
+int cppc_set_auto_sel(int cpu, bool enable)
+{
+	int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
+	struct cpc_register_resource *auto_sel_reg;
+	struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu);
+	struct cppc_pcc_data *pcc_ss_data = NULL;
+	int ret = -EINVAL;
+
+	if (!cpc_desc) {
+		pr_debug("No CPC descriptor for CPU:%d\n", cpu);
+		return -ENODEV;
+	}
+
+	auto_sel_reg = &cpc_desc->cpc_regs[AUTO_SEL_ENABLE];
+
+	if (CPC_IN_PCC(auto_sel_reg)) {
+		if (pcc_ss_id < 0) {
+			pr_debug("Invalid pcc_ss_id\n");
+			return -ENODEV;
+		}
+
+		if (CPC_SUPPORTED(auto_sel_reg)) {
+			ret = cpc_write(cpu, auto_sel_reg, enable);
+			if (ret)
+				return ret;
+		}
+
+		pcc_ss_data = pcc_data[pcc_ss_id];
+
+		down_write(&pcc_ss_data->pcc_lock);
+		/* after writing CPC, transfer the ownership of PCC to platform */
+		ret = send_pcc_cmd(pcc_ss_id, CMD_WRITE);
+		up_write(&pcc_ss_data->pcc_lock);
+	} else {
+		ret = -ENOTSUPP;
+		pr_debug("_CPC in PCC is not supported\n");
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cppc_set_auto_sel);
+
 /**
  * cppc_set_enable - Set to enable CPPC on the processor by writing the
  * Continuous Performance Control package EnableRegister field.
@@ -1488,7 +1584,7 @@ EXPORT_SYMBOL_GPL(cppc_set_enable);
 int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
 {
 	struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu);
-	struct cpc_register_resource *desired_reg;
+	struct cpc_register_resource *desired_reg, *min_perf_reg, *max_perf_reg;
 	int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
 	struct cppc_pcc_data *pcc_ss_data = NULL;
 	int ret = 0;
@@ -1499,6 +1595,8 @@ int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
 	}
 
 	desired_reg = &cpc_desc->cpc_regs[DESIRED_PERF];
+	min_perf_reg = &cpc_desc->cpc_regs[MIN_PERF];
+	max_perf_reg = &cpc_desc->cpc_regs[MAX_PERF];
 
 	/*
 	 * This is Phase-I where we want to write to CPC registers
@@ -1507,7 +1605,7 @@ int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
 	 * Since read_lock can be acquired by multiple CPUs simultaneously we
 	 * achieve that goal here
 	 */
-	if (CPC_IN_PCC(desired_reg)) {
+	if (CPC_IN_PCC(desired_reg) || CPC_IN_PCC(min_perf_reg) || CPC_IN_PCC(max_perf_reg)) {
 		if (pcc_ss_id < 0) {
 			pr_debug("Invalid pcc_ss_id\n");
 			return -ENODEV;
@@ -1530,13 +1628,19 @@ int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
 		cpc_desc->write_cmd_status = 0;
 	}
 
+	cpc_write(cpu, desired_reg, perf_ctrls->desired_perf);
+
 	/*
-	 * Skip writing MIN/MAX until Linux knows how to come up with
-	 * useful values.
+	 * Only write if min_perf and max_perf not zero. Some drivers pass zero
+	 * value to min and max perf, but they don't mean to set the zero value,
+	 * they just don't want to write to those registers.
 	 */
-	cpc_write(cpu, desired_reg, perf_ctrls->desired_perf);
+	if (perf_ctrls->min_perf)
+		cpc_write(cpu, min_perf_reg, perf_ctrls->min_perf);
+	if (perf_ctrls->max_perf)
+		cpc_write(cpu, max_perf_reg, perf_ctrls->max_perf);
 
-	if (CPC_IN_PCC(desired_reg))
+	if (CPC_IN_PCC(desired_reg) || CPC_IN_PCC(min_perf_reg) || CPC_IN_PCC(max_perf_reg))
 		up_read(&pcc_ss_data->pcc_lock);	/* END Phase-I */
 	/*
 	 * This is Phase-II where we transfer the ownership of PCC to Platform
@@ -1584,7 +1688,7 @@ int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls)
 	 * case during a CMD_READ and if there are pending writes it delivers
 	 * the write command before servicing the read command
 	 */
-	if (CPC_IN_PCC(desired_reg)) {
+	if (CPC_IN_PCC(desired_reg) || CPC_IN_PCC(min_perf_reg) || CPC_IN_PCC(max_perf_reg)) {
 		if (down_write_trylock(&pcc_ss_data->pcc_lock)) {/* BEGIN Phase-II */
 			/* Update only if there are pending write commands */
 			if (pcc_ss_data->pending_pcc_write_cmd)

drivers/cpufreq/Kconfig.arm

@@ -95,7 +95,7 @@ config ARM_BRCMSTB_AVS_CPUFREQ
 	help
 	  Some Broadcom STB SoCs use a co-processor running proprietary firmware
 	  ("AVS") to handle voltage and frequency scaling. This driver provides
-	  a standard CPUfreq interface to to the firmware.
+	  a standard CPUfreq interface to the firmware.
 
 	  Say Y, if you have a Broadcom SoC with AVS support for DFS or DVFS.
 

drivers/cpufreq/amd-pstate.c

@@ -106,6 +106,8 @@ static unsigned int epp_values[] = {
 	[EPP_INDEX_POWERSAVE] = AMD_CPPC_EPP_POWERSAVE,
  };
 
+typedef int (*cppc_mode_transition_fn)(int);
+
 static inline int get_mode_idx_from_str(const char *str, size_t size)
 {
 	int i;
@@ -308,7 +310,22 @@ static int cppc_init_perf(struct amd_cpudata *cpudata)
 		   cppc_perf.lowest_nonlinear_perf);
 	WRITE_ONCE(cpudata->lowest_perf, cppc_perf.lowest_perf);
 
-	return 0;
+	if (cppc_state == AMD_PSTATE_ACTIVE)
+		return 0;
+
+	ret = cppc_get_auto_sel_caps(cpudata->cpu, &cppc_perf);
+	if (ret) {
+		pr_warn("failed to get auto_sel, ret: %d\n", ret);
+		return 0;
+	}
+
+	ret = cppc_set_auto_sel(cpudata->cpu,
+			(cppc_state == AMD_PSTATE_PASSIVE) ? 0 : 1);
+
+	if (ret)
+		pr_warn("failed to set auto_sel, ret: %d\n", ret);
+
+	return ret;
 }
 
 DEFINE_STATIC_CALL(amd_pstate_init_perf, pstate_init_perf);
@@ -385,12 +402,18 @@ static inline bool amd_pstate_sample(struct amd_cpudata *cpudata)
 }
 
 static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf,
-			      u32 des_perf, u32 max_perf, bool fast_switch)
+			      u32 des_perf, u32 max_perf, bool fast_switch, int gov_flags)
 {
 	u64 prev = READ_ONCE(cpudata->cppc_req_cached);
 	u64 value = prev;
 
 	des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf);
+
+	if ((cppc_state == AMD_PSTATE_GUIDED) && (gov_flags & CPUFREQ_GOV_DYNAMIC_SWITCHING)) {
+		min_perf = des_perf;
+		des_perf = 0;
+	}
+
 	value &= ~AMD_CPPC_MIN_PERF(~0L);
 	value |= AMD_CPPC_MIN_PERF(min_perf);
 
@@ -445,7 +468,7 @@ static int amd_pstate_target(struct cpufreq_policy *policy,
 
 	cpufreq_freq_transition_begin(policy, &freqs);
 	amd_pstate_update(cpudata, min_perf, des_perf,
-			  max_perf, false);
+			  max_perf, false, policy->governor->flags);
 	cpufreq_freq_transition_end(policy, &freqs, false);
 
 	return 0;
@@ -479,7 +502,8 @@ static void amd_pstate_adjust_perf(unsigned int cpu,
 	if (max_perf < min_perf)
 		max_perf = min_perf;
 
-	amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true);
+	amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true,
+			policy->governor->flags);
 	cpufreq_cpu_put(policy);
 }
 
@@ -816,6 +840,98 @@ static ssize_t show_energy_performance_preference(
 	return sysfs_emit(buf, "%s\n", energy_perf_strings[preference]);
 }
 
+static void amd_pstate_driver_cleanup(void)
+{
+	amd_pstate_enable(false);
+	cppc_state = AMD_PSTATE_DISABLE;
+	current_pstate_driver = NULL;
+}
+
+static int amd_pstate_register_driver(int mode)
+{
+	int ret;
+
+	if (mode == AMD_PSTATE_PASSIVE || mode == AMD_PSTATE_GUIDED)
+		current_pstate_driver = &amd_pstate_driver;
+	else if (mode == AMD_PSTATE_ACTIVE)
+		current_pstate_driver = &amd_pstate_epp_driver;
+	else
+		return -EINVAL;
+
+	cppc_state = mode;
+	ret = cpufreq_register_driver(current_pstate_driver);
+	if (ret) {
+		amd_pstate_driver_cleanup();
+		return ret;
+	}
+	return 0;
+}
+
+static int amd_pstate_unregister_driver(int dummy)
+{
+	cpufreq_unregister_driver(current_pstate_driver);
+	amd_pstate_driver_cleanup();
+	return 0;
+}
+
+static int amd_pstate_change_mode_without_dvr_change(int mode)
+{
+	int cpu = 0;
+
+	cppc_state = mode;
+
+	if (boot_cpu_has(X86_FEATURE_CPPC) || cppc_state == AMD_PSTATE_ACTIVE)
+		return 0;
+
+	for_each_present_cpu(cpu) {
+		cppc_set_auto_sel(cpu, (cppc_state == AMD_PSTATE_PASSIVE) ? 0 : 1);
+	}
+
+	return 0;
+}
+
+static int amd_pstate_change_driver_mode(int mode)
+{
+	int ret;
+
+	ret = amd_pstate_unregister_driver(0);
+	if (ret)
+		return ret;
+
+	ret = amd_pstate_register_driver(mode);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static cppc_mode_transition_fn mode_state_machine[AMD_PSTATE_MAX][AMD_PSTATE_MAX] = {
+	[AMD_PSTATE_DISABLE]         = {
+		[AMD_PSTATE_DISABLE]     = NULL,
+		[AMD_PSTATE_PASSIVE]     = amd_pstate_register_driver,
+		[AMD_PSTATE_ACTIVE]      = amd_pstate_register_driver,
+		[AMD_PSTATE_GUIDED]      = amd_pstate_register_driver,
+	},
+	[AMD_PSTATE_PASSIVE]         = {
+		[AMD_PSTATE_DISABLE]     = amd_pstate_unregister_driver,
+		[AMD_PSTATE_PASSIVE]     = NULL,
+		[AMD_PSTATE_ACTIVE]      = amd_pstate_change_driver_mode,
+		[AMD_PSTATE_GUIDED]      = amd_pstate_change_mode_without_dvr_change,
+	},
+	[AMD_PSTATE_ACTIVE]          = {
+		[AMD_PSTATE_DISABLE]     = amd_pstate_unregister_driver,
+		[AMD_PSTATE_PASSIVE]     = amd_pstate_change_driver_mode,
+		[AMD_PSTATE_ACTIVE]      = NULL,
+		[AMD_PSTATE_GUIDED]      = amd_pstate_change_driver_mode,
+	},
+	[AMD_PSTATE_GUIDED]          = {
+		[AMD_PSTATE_DISABLE]     = amd_pstate_unregister_driver,
+		[AMD_PSTATE_PASSIVE]     = amd_pstate_change_mode_without_dvr_change,
+		[AMD_PSTATE_ACTIVE]      = amd_pstate_change_driver_mode,
+		[AMD_PSTATE_GUIDED]      = NULL,
+	},
+};
+
 static ssize_t amd_pstate_show_status(char *buf)
 {
 	if (!current_pstate_driver)
@@ -824,55 +940,22 @@ static ssize_t amd_pstate_show_status(char *buf)
 	return sysfs_emit(buf, "%s\n", amd_pstate_mode_string[cppc_state]);
 }
 
-static void amd_pstate_driver_cleanup(void)
-{
-	current_pstate_driver = NULL;
-}
-
 static int amd_pstate_update_status(const char *buf, size_t size)
 {
-	int ret = 0;
 	int mode_idx;
 
-	if (size > 7 || size < 6)
+	if (size > strlen("passive") || size < strlen("active"))
 		return -EINVAL;
-	mode_idx = get_mode_idx_from_str(buf, size);
 
-	switch(mode_idx) {
-	case AMD_PSTATE_DISABLE:
-		if (current_pstate_driver) {
-			cpufreq_unregister_driver(current_pstate_driver);
-			amd_pstate_driver_cleanup();
-		}
-		break;
-	case AMD_PSTATE_PASSIVE:
-		if (current_pstate_driver) {
-			if (current_pstate_driver == &amd_pstate_driver)
-				return 0;
-			cpufreq_unregister_driver(current_pstate_driver);
-		}
+	mode_idx = get_mode_idx_from_str(buf, size);
 
-		current_pstate_driver = &amd_pstate_driver;
-		cppc_state = AMD_PSTATE_PASSIVE;
-		ret = cpufreq_register_driver(current_pstate_driver);
-		break;
-	case AMD_PSTATE_ACTIVE:
-		if (current_pstate_driver) {
-			if (current_pstate_driver == &amd_pstate_epp_driver)
-				return 0;
-			cpufreq_unregister_driver(current_pstate_driver);
-		}
+	if (mode_idx < 0 || mode_idx >= AMD_PSTATE_MAX)
+		return -EINVAL;
 
-		current_pstate_driver = &amd_pstate_epp_driver;
-		cppc_state = AMD_PSTATE_ACTIVE;
-		ret = cpufreq_register_driver(current_pstate_driver);
-		break;
-	default:
-		ret = -EINVAL;
-		break;
-	}
+	if (mode_state_machine[cppc_state][mode_idx])
+		return mode_state_machine[cppc_state][mode_idx](mode_idx);
 
-	return ret;
+	return 0;
 }
 
 static ssize_t show_status(struct kobject *kobj,
@@ -1277,7 +1360,7 @@ static int __init amd_pstate_init(void)
 	/* capability check */
 	if (boot_cpu_has(X86_FEATURE_CPPC)) {
 		pr_debug("AMD CPPC MSR based functionality is supported\n");
-		if (cppc_state == AMD_PSTATE_PASSIVE)
+		if (cppc_state != AMD_PSTATE_ACTIVE)
 			current_pstate_driver->adjust_perf = amd_pstate_adjust_perf;
 	} else {
 		pr_debug("AMD CPPC shared memory based functionality is supported\n");
@@ -1339,7 +1422,7 @@ static int __init amd_pstate_param(char *str)
 		if (cppc_state == AMD_PSTATE_ACTIVE)
 			current_pstate_driver = &amd_pstate_epp_driver;
 
-		if (cppc_state == AMD_PSTATE_PASSIVE)
+		if (cppc_state == AMD_PSTATE_PASSIVE || cppc_state == AMD_PSTATE_GUIDED)
 			current_pstate_driver = &amd_pstate_driver;
 
 		return 0;

drivers/cpufreq/cpufreq-dt-platdev.c

@@ -152,6 +152,7 @@ static const struct of_device_id blocklist[] __initconst = {
 	{ .compatible = "qcom,sm6115", },
 	{ .compatible = "qcom,sm6350", },
 	{ .compatible = "qcom,sm6375", },
+	{ .compatible = "qcom,sm7225", },
 	{ .compatible = "qcom,sm8150", },
 	{ .compatible = "qcom,sm8250", },
 	{ .compatible = "qcom,sm8350", },
@@ -179,7 +180,7 @@ static bool __init cpu0_node_has_opp_v2_prop(void)
 	struct device_node *np = of_cpu_device_node_get(0);
 	bool ret = false;
 
-	if (of_get_property(np, "operating-points-v2", NULL))
+	if (of_property_present(np, "operating-points-v2"))
 		ret = true;
 
 	of_node_put(np);

drivers/cpufreq/cpufreq.c

@@ -73,6 +73,11 @@ static inline bool has_target(void)
 	return cpufreq_driver->target_index || cpufreq_driver->target;
 }
 
+bool has_target_index(void)
+{
+	return !!cpufreq_driver->target_index;
+}
+
 /* internal prototypes */
 static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
 static int cpufreq_init_governor(struct cpufreq_policy *policy);
@@ -725,9 +730,9 @@ static ssize_t store_##file_name					\
 	unsigned long val;						\
 	int ret;							\
 									\
-	ret = sscanf(buf, "%lu", &val);					\
-	if (ret != 1)							\
-		return -EINVAL;						\
+	ret = kstrtoul(buf, 0, &val);					\
+	if (ret)							\
+		return ret;						\
 									\
 	ret = freq_qos_update_request(policy->object##_freq_req, val);\
 	return ret >= 0 ? count : ret;					\
@@ -1727,7 +1732,7 @@ static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, b
 		 * MHz. In such cases it is better to avoid getting into
 		 * unnecessary frequency updates.
 		 */
-		if (abs(policy->cur - new_freq) < HZ_PER_MHZ)
+		if (abs(policy->cur - new_freq) < KHZ_PER_MHZ)
 			return policy->cur;
 
 		cpufreq_out_of_sync(policy, new_freq);

drivers/cpufreq/freq_table.c

@@ -355,8 +355,13 @@ int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy)
 {
 	int ret;
 
-	if (!policy->freq_table)
+	if (!policy->freq_table) {
+		/* Freq table must be passed by drivers with target_index() */
+		if (has_target_index())
+			return -EINVAL;
+
 		return 0;
+	}
 
 	ret = cpufreq_frequency_table_cpuinfo(policy, policy->freq_table);
 	if (ret)
@@ -367,4 +372,3 @@ int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy)
 
 MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
 MODULE_DESCRIPTION("CPUfreq frequency table helpers");
-MODULE_LICENSE("GPL");

drivers/cpufreq/imx-cpufreq-dt.c

@@ -89,7 +89,7 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
 
 	cpu_dev = get_cpu_device(0);
 
-	if (!of_find_property(cpu_dev->of_node, "cpu-supply", NULL))
+	if (!of_property_present(cpu_dev->of_node, "cpu-supply"))
 		return -ENODEV;
 
 	if (of_machine_is_compatible("fsl,imx7ulp")) {

drivers/cpufreq/imx6q-cpufreq.c

@@ -222,7 +222,7 @@ static int imx6q_opp_check_speed_grading(struct device *dev)
 	u32 val;
 	int ret;
 
-	if (of_find_property(dev->of_node, "nvmem-cells", NULL)) {
+	if (of_property_present(dev->of_node, "nvmem-cells")) {
 		ret = nvmem_cell_read_u32(dev, "speed_grade", &val);
 		if (ret)
 			return ret;
@@ -279,7 +279,7 @@ static int imx6ul_opp_check_speed_grading(struct device *dev)
 	u32 val;
 	int ret = 0;
 
-	if (of_find_property(dev->of_node, "nvmem-cells", NULL)) {
+	if (of_property_present(dev->of_node, "nvmem-cells")) {
 		ret = nvmem_cell_read_u32(dev, "speed_grade", &val);
 		if (ret)
 			return ret;

drivers/cpufreq/intel_pstate.c

@@ -2384,12 +2384,6 @@ static const struct x86_cpu_id intel_pstate_cpu_ee_disable_ids[] = {
 	{}
 };
 
-static const struct x86_cpu_id intel_pstate_hwp_boost_ids[] = {
-	X86_MATCH(SKYLAKE_X,		core_funcs),
-	X86_MATCH(SKYLAKE,		core_funcs),
-	{}
-};
-
 static int intel_pstate_init_cpu(unsigned int cpunum)
 {
 	struct cpudata *cpu;
@@ -2408,12 +2402,9 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
 		cpu->epp_default = -EINVAL;
 
 		if (hwp_active) {
-			const struct x86_cpu_id *id;
-
 			intel_pstate_hwp_enable(cpu);
 
-			id = x86_match_cpu(intel_pstate_hwp_boost_ids);
-			if (id && intel_pstate_acpi_pm_profile_server())
+			if (intel_pstate_acpi_pm_profile_server())
 				hwp_boost = true;
 		}
 	} else if (hwp_active) {

drivers/cpufreq/mediatek-cpufreq.c

@@ -373,13 +373,13 @@ static struct device *of_get_cci(struct device *cpu_dev)
 	struct platform_device *pdev;
 
 	np = of_parse_phandle(cpu_dev->of_node, "mediatek,cci", 0);
-	if (IS_ERR_OR_NULL(np))
-		return NULL;
+	if (!np)
+		return ERR_PTR(-ENODEV);
 
 	pdev = of_find_device_by_node(np);
 	of_node_put(np);
-	if (IS_ERR_OR_NULL(pdev))
-		return NULL;
+	if (!pdev)
+		return ERR_PTR(-ENODEV);
 
 	return &pdev->dev;
 }
@@ -401,7 +401,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	info->ccifreq_bound = false;
 	if (info->soc_data->ccifreq_supported) {
 		info->cci_dev = of_get_cci(info->cpu_dev);
-		if (IS_ERR_OR_NULL(info->cci_dev)) {
+		if (IS_ERR(info->cci_dev)) {
 			ret = PTR_ERR(info->cci_dev);
 			dev_err(cpu_dev, "cpu%d: failed to get cci device\n", cpu);
 			return -ENODEV;
@@ -420,7 +420,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 		ret = PTR_ERR(info->inter_clk);
 		dev_err_probe(cpu_dev, ret,
 			      "cpu%d: failed to get intermediate clk\n", cpu);
-		goto out_free_resources;
+		goto out_free_mux_clock;
 	}
 
 	info->proc_reg = regulator_get_optional(cpu_dev, "proc");
@@ -428,13 +428,13 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 		ret = PTR_ERR(info->proc_reg);
 		dev_err_probe(cpu_dev, ret,
 			      "cpu%d: failed to get proc regulator\n", cpu);
-		goto out_free_resources;
+		goto out_free_inter_clock;
 	}
 
 	ret = regulator_enable(info->proc_reg);
 	if (ret) {
 		dev_warn(cpu_dev, "cpu%d: failed to enable vproc\n", cpu);
-		goto out_free_resources;
+		goto out_free_proc_reg;
 	}
 
 	/* Both presence and absence of sram regulator are valid cases. */
@@ -442,14 +442,14 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	if (IS_ERR(info->sram_reg)) {
 		ret = PTR_ERR(info->sram_reg);
 		if (ret == -EPROBE_DEFER)
-			goto out_free_resources;
+			goto out_disable_proc_reg;
 
 		info->sram_reg = NULL;
 	} else {
 		ret = regulator_enable(info->sram_reg);
 		if (ret) {
 			dev_warn(cpu_dev, "cpu%d: failed to enable vsram\n", cpu);
-			goto out_free_resources;
+			goto out_free_sram_reg;
 		}
 	}
 
@@ -458,13 +458,13 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 	if (ret) {
 		dev_err(cpu_dev,
 			"cpu%d: failed to get OPP-sharing information\n", cpu);
-		goto out_free_resources;
+		goto out_disable_sram_reg;
 	}
 
 	ret = dev_pm_opp_of_cpumask_add_table(&info->cpus);
 	if (ret) {
 		dev_warn(cpu_dev, "cpu%d: no OPP table\n", cpu);
-		goto out_free_resources;
+		goto out_disable_sram_reg;
 	}
 
 	ret = clk_prepare_enable(info->cpu_clk);
@@ -533,43 +533,41 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
 out_free_opp_table:
 	dev_pm_opp_of_cpumask_remove_table(&info->cpus);
 
-out_free_resources:
-	if (regulator_is_enabled(info->proc_reg))
-		regulator_disable(info->proc_reg);
-	if (info->sram_reg && regulator_is_enabled(info->sram_reg))
+out_disable_sram_reg:
+	if (info->sram_reg)
 		regulator_disable(info->sram_reg);
 
-	if (!IS_ERR(info->proc_reg))
-		regulator_put(info->proc_reg);
-	if (!IS_ERR(info->sram_reg))
+out_free_sram_reg:
+	if (info->sram_reg)
 		regulator_put(info->sram_reg);
-	if (!IS_ERR(info->cpu_clk))
-		clk_put(info->cpu_clk);
-	if (!IS_ERR(info->inter_clk))
-		clk_put(info->inter_clk);
+
+out_disable_proc_reg:
+	regulator_disable(info->proc_reg);
+
+out_free_proc_reg:
+	regulator_put(info->proc_reg);
+
+out_free_inter_clock:
+	clk_put(info->inter_clk);
+
+out_free_mux_clock:
+	clk_put(info->cpu_clk);
 
 	return ret;
 }
 
 static void mtk_cpu_dvfs_info_release(struct mtk_cpu_dvfs_info *info)
 {
-	if (!IS_ERR(info->proc_reg)) {
-		regulator_disable(info->proc_reg);
-		regulator_put(info->proc_reg);
-	}
-	if (!IS_ERR(info->sram_reg)) {
+	regulator_disable(info->proc_reg);
+	regulator_put(info->proc_reg);
+	if (info->sram_reg) {
 		regulator_disable(info->sram_reg);
 		regulator_put(info->sram_reg);
 	}
-	if (!IS_ERR(info->cpu_clk)) {
-		clk_disable_unprepare(info->cpu_clk);
-		clk_put(info->cpu_clk);
-	}
-	if (!IS_ERR(info->inter_clk)) {
-		clk_disable_unprepare(info->inter_clk);
-		clk_put(info->inter_clk);
-	}
-
+	clk_disable_unprepare(info->cpu_clk);
+	clk_put(info->cpu_clk);
+	clk_disable_unprepare(info->inter_clk);
+	clk_put(info->inter_clk);
 	dev_pm_opp_of_cpumask_remove_table(&info->cpus);
 	dev_pm_opp_unregister_notifier(info->cpu_dev, &info->opp_nb);
 }
@@ -695,6 +693,15 @@ static const struct mtk_cpufreq_platform_data mt2701_platform_data = {
 	.ccifreq_supported = false,
 };
 
+static const struct mtk_cpufreq_platform_data mt7622_platform_data = {
+	.min_volt_shift = 100000,
+	.max_volt_shift = 200000,
+	.proc_max_volt = 1360000,
+	.sram_min_volt = 0,
+	.sram_max_volt = 1360000,
+	.ccifreq_supported = false,
+};
+
 static const struct mtk_cpufreq_platform_data mt8183_platform_data = {
 	.min_volt_shift = 100000,
 	.max_volt_shift = 200000,
@@ -713,20 +720,29 @@ static const struct mtk_cpufreq_platform_data mt8186_platform_data = {
 	.ccifreq_supported = true,
 };
 
+static const struct mtk_cpufreq_platform_data mt8516_platform_data = {
+	.min_volt_shift = 100000,
+	.max_volt_shift = 200000,
+	.proc_max_volt = 1310000,
+	.sram_min_volt = 0,
+	.sram_max_volt = 1310000,
+	.ccifreq_supported = false,
+};
+
 /* List of machines supported by this driver */
 static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
 	{ .compatible = "mediatek,mt2701", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt2712", .data = &mt2701_platform_data },
-	{ .compatible = "mediatek,mt7622", .data = &mt2701_platform_data },
-	{ .compatible = "mediatek,mt7623", .data = &mt2701_platform_data },
-	{ .compatible = "mediatek,mt8167", .data = &mt2701_platform_data },
+	{ .compatible = "mediatek,mt7622", .data = &mt7622_platform_data },
+	{ .compatible = "mediatek,mt7623", .data = &mt7622_platform_data },
+	{ .compatible = "mediatek,mt8167", .data = &mt8516_platform_data },
 	{ .compatible = "mediatek,mt817x", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt8173", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt8176", .data = &mt2701_platform_data },
 	{ .compatible = "mediatek,mt8183", .data = &mt8183_platform_data },
 	{ .compatible = "mediatek,mt8186", .data = &mt8186_platform_data },
 	{ .compatible = "mediatek,mt8365", .data = &mt2701_platform_data },
-	{ .compatible = "mediatek,mt8516", .data = &mt2701_platform_data },
+	{ .compatible = "mediatek,mt8516", .data = &mt8516_platform_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mtk_cpufreq_machines);

drivers/cpufreq/pmac32-cpufreq.c

@@ -546,7 +546,7 @@ static int pmac_cpufreq_init_7447A(struct device_node *cpunode)
 {
 	struct device_node *volt_gpio_np;
 
-	if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
+	if (!of_property_read_bool(cpunode, "dynamic-power-step"))
 		return 1;
 
 	volt_gpio_np = of_find_node_by_name(NULL, "cpu-vcore-select");
@@ -576,7 +576,7 @@ static int pmac_cpufreq_init_750FX(struct device_node *cpunode)
 	u32 pvr;
 	const u32 *value;
 
-	if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
+	if (!of_property_read_bool(cpunode, "dynamic-power-step"))
 		return 1;
 
 	hi_freq = cur_freq;
@@ -632,7 +632,7 @@ static int __init pmac_cpufreq_setup(void)
 
 	/*  Check for 7447A based MacRISC3 */
 	if (of_machine_is_compatible("MacRISC3") &&
-	    of_get_property(cpunode, "dynamic-power-step", NULL) &&
+	    of_property_read_bool(cpunode, "dynamic-power-step") &&
 	    PVR_VER(mfspr(SPRN_PVR)) == 0x8003) {
 		pmac_cpufreq_init_7447A(cpunode);
 

drivers/cpufreq/qcom-cpufreq-hw.c

@@ -14,7 +14,6 @@
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/pm_opp.h>
-#include <linux/pm_qos.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/units.h>
@@ -29,6 +28,8 @@
 
 #define GT_IRQ_STATUS			BIT(2)
 
+#define MAX_FREQ_DOMAINS		3
+
 struct qcom_cpufreq_soc_data {
 	u32 reg_enable;
 	u32 reg_domain_state;
@@ -43,7 +44,6 @@ struct qcom_cpufreq_soc_data {
 
 struct qcom_cpufreq_data {
 	void __iomem *base;
-	struct resource *res;
 
 	/*
 	 * Mutex to synchronize between de-init sequence and re-starting LMh
@@ -58,8 +58,6 @@ struct qcom_cpufreq_data {
 	struct clk_hw cpu_clk;
 
 	bool per_core_dcvs;
-
-	struct freq_qos_request throttle_freq_req;
 };
 
 static struct {
@@ -349,8 +347,6 @@ static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
 
 	throttled_freq = freq_hz / HZ_PER_KHZ;
 
-	freq_qos_update_request(&data->throttle_freq_req, throttled_freq);
-
 	/* Update thermal pressure (the boost frequencies are accepted) */
 	arch_update_thermal_pressure(policy->related_cpus, throttled_freq);
 
@@ -443,14 +439,6 @@ static int qcom_cpufreq_hw_lmh_init(struct cpufreq_policy *policy, int index)
 	if (data->throttle_irq < 0)
 		return data->throttle_irq;
 
-	ret = freq_qos_add_request(&policy->constraints,
-				   &data->throttle_freq_req, FREQ_QOS_MAX,
-				   FREQ_QOS_MAX_DEFAULT_VALUE);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "Failed to add freq constraint (%d)\n", ret);
-		return ret;
-	}
-
 	data->cancel_throttle = false;
 	data->policy = policy;
 
@@ -517,7 +505,6 @@ static void qcom_cpufreq_hw_lmh_exit(struct qcom_cpufreq_data *data)
 	if (data->throttle_irq <= 0)
 		return;
 
-	freq_qos_remove_request(&data->throttle_freq_req);
 	free_irq(data->throttle_irq, data);
 }
 
@@ -590,16 +577,12 @@ static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
 {
 	struct device *cpu_dev = get_cpu_device(policy->cpu);
 	struct qcom_cpufreq_data *data = policy->driver_data;
-	struct resource *res = data->res;
-	void __iomem *base = data->base;
 
 	dev_pm_opp_remove_all_dynamic(cpu_dev);
 	dev_pm_opp_of_cpumask_remove_table(policy->related_cpus);
 	qcom_cpufreq_hw_lmh_exit(data);
 	kfree(policy->freq_table);
 	kfree(data);
-	iounmap(base);
-	release_mem_region(res->start, resource_size(res));
 
 	return 0;
 }
@@ -651,10 +634,9 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
 {
 	struct clk_hw_onecell_data *clk_data;
 	struct device *dev = &pdev->dev;
-	struct device_node *soc_node;
 	struct device *cpu_dev;
 	struct clk *clk;
-	int ret, i, num_domains, reg_sz;
+	int ret, i, num_domains;
 
 	clk = clk_get(dev, "xo");
 	if (IS_ERR(clk))
@@ -681,24 +663,9 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	/* Allocate qcom_cpufreq_data based on the available frequency domains in DT */
-	soc_node = of_get_parent(dev->of_node);
-	if (!soc_node)
-		return -EINVAL;
-
-	ret = of_property_read_u32(soc_node, "#address-cells", &reg_sz);
-	if (ret)
-		goto of_exit;
-
-	ret = of_property_read_u32(soc_node, "#size-cells", &i);
-	if (ret)
-		goto of_exit;
-
-	reg_sz += i;
-
-	num_domains = of_property_count_elems_of_size(dev->of_node, "reg", sizeof(u32) * reg_sz);
-	if (num_domains <= 0)
-		return num_domains;
+	for (num_domains = 0; num_domains < MAX_FREQ_DOMAINS; num_domains++)
+		if (!platform_get_resource(pdev, IORESOURCE_MEM, num_domains))
+			break;
 
 	qcom_cpufreq.data = devm_kzalloc(dev, sizeof(struct qcom_cpufreq_data) * num_domains,
 					 GFP_KERNEL);
@@ -718,17 +685,15 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
 	for (i = 0; i < num_domains; i++) {
 		struct qcom_cpufreq_data *data = &qcom_cpufreq.data[i];
 		struct clk_init_data clk_init = {};
-		struct resource *res;
 		void __iomem *base;
 
-		base = devm_platform_get_and_ioremap_resource(pdev, i, &res);
+		base = devm_platform_ioremap_resource(pdev, i);
 		if (IS_ERR(base)) {
-			dev_err(dev, "Failed to map resource %pR\n", res);
+			dev_err(dev, "Failed to map resource index %d\n", i);
 			return PTR_ERR(base);
 		}
 
 		data->base = base;
-		data->res = res;
 
 		/* Register CPU clock for each frequency domain */
 		clk_init.name = kasprintf(GFP_KERNEL, "qcom_cpufreq%d", i);
@@ -762,9 +727,6 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
 	else
 		dev_dbg(dev, "QCOM CPUFreq HW driver initialized\n");
 
-of_exit:
-	of_node_put(soc_node);
-
 	return ret;
 }
 

drivers/cpufreq/scmi-cpufreq.c

@@ -310,7 +310,7 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev)
 
 #ifdef CONFIG_COMMON_CLK
 	/* dummy clock provider as needed by OPP if clocks property is used */
-	if (of_find_property(dev->of_node, "#clock-cells", NULL))
+	if (of_property_present(dev->of_node, "#clock-cells"))
 		devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, NULL);
 #endif
 

drivers/cpufreq/tegra124-cpufreq.c

@@ -221,4 +221,3 @@ module_init(tegra_cpufreq_init);
 
 MODULE_AUTHOR("Tuomas Tynkkynen <ttynkkynen@nvidia.com>");
 MODULE_DESCRIPTION("cpufreq driver for NVIDIA Tegra124");
-MODULE_LICENSE("GPL v2");

drivers/cpufreq/tegra194-cpufreq.c

@@ -12,6 +12,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/units.h>
 
 #include <asm/smp_plat.h>
 
@@ -65,12 +66,36 @@ struct tegra_cpufreq_soc {
 
 struct tegra194_cpufreq_data {
 	void __iomem *regs;
-	struct cpufreq_frequency_table **tables;
+	struct cpufreq_frequency_table **bpmp_luts;
 	const struct tegra_cpufreq_soc *soc;
+	bool icc_dram_bw_scaling;
 };
 
 static struct workqueue_struct *read_counters_wq;
 
+static int tegra_cpufreq_set_bw(struct cpufreq_policy *policy, unsigned long freq_khz)
+{
+	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+	struct dev_pm_opp *opp;
+	struct device *dev;
+	int ret;
+
+	dev = get_cpu_device(policy->cpu);
+	if (!dev)
+		return -ENODEV;
+
+	opp = dev_pm_opp_find_freq_exact(dev, freq_khz * KHZ, true);
+	if (IS_ERR(opp))
+		return PTR_ERR(opp);
+
+	ret = dev_pm_opp_set_opp(dev, opp);
+	if (ret)
+		data->icc_dram_bw_scaling = false;
+
+	dev_pm_opp_put(opp);
+	return ret;
+}
+
 static void tegra_get_cpu_mpidr(void *mpidr)
 {
 	*((u64 *)mpidr) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
@@ -354,7 +379,7 @@ static unsigned int tegra194_get_speed(u32 cpu)
 	 * to the last written ndiv value from freq_table. This is
 	 * done to return consistent value.
 	 */
-	cpufreq_for_each_valid_entry(pos, data->tables[clusterid]) {
+	cpufreq_for_each_valid_entry(pos, data->bpmp_luts[clusterid]) {
 		if (pos->driver_data != ndiv)
 			continue;
 
@@ -369,16 +394,93 @@ static unsigned int tegra194_get_speed(u32 cpu)
 	return rate;
 }
 
+static int tegra_cpufreq_init_cpufreq_table(struct cpufreq_policy *policy,
+					    struct cpufreq_frequency_table *bpmp_lut,
+					    struct cpufreq_frequency_table **opp_table)
+{
+	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+	struct cpufreq_frequency_table *freq_table = NULL;
+	struct cpufreq_frequency_table *pos;
+	struct device *cpu_dev;
+	struct dev_pm_opp *opp;
+	unsigned long rate;
+	int ret, max_opps;
+	int j = 0;
+
+	cpu_dev = get_cpu_device(policy->cpu);
+	if (!cpu_dev) {
+		pr_err("%s: failed to get cpu%d device\n", __func__, policy->cpu);
+		return -ENODEV;
+	}
+
+	/* Initialize OPP table mentioned in operating-points-v2 property in DT */
+	ret = dev_pm_opp_of_add_table_indexed(cpu_dev, 0);
+	if (!ret) {
+		max_opps = dev_pm_opp_get_opp_count(cpu_dev);
+		if (max_opps <= 0) {
+			dev_err(cpu_dev, "Failed to add OPPs\n");
+			return max_opps;
+		}
+
+		/* Disable all opps and cross-validate against LUT later */
+		for (rate = 0; ; rate++) {
+			opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
+			if (IS_ERR(opp))
+				break;
+
+			dev_pm_opp_put(opp);
+			dev_pm_opp_disable(cpu_dev, rate);
+		}
+	} else {
+		dev_err(cpu_dev, "Invalid or empty opp table in device tree\n");
+		data->icc_dram_bw_scaling = false;
+		return ret;
+	}
+
+	freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_KERNEL);
+	if (!freq_table)
+		return -ENOMEM;
+
+	/*
+	 * Cross check the frequencies from BPMP-FW LUT against the OPP's present in DT.
+	 * Enable only those DT OPP's which are present in LUT also.
+	 */
+	cpufreq_for_each_valid_entry(pos, bpmp_lut) {
+		opp = dev_pm_opp_find_freq_exact(cpu_dev, pos->frequency * KHZ, false);
+		if (IS_ERR(opp))
+			continue;
+
+		ret = dev_pm_opp_enable(cpu_dev, pos->frequency * KHZ);
+		if (ret < 0)
+			return ret;
+
+		freq_table[j].driver_data = pos->driver_data;
+		freq_table[j].frequency = pos->frequency;
+		j++;
+	}
+
+	freq_table[j].driver_data = pos->driver_data;
+	freq_table[j].frequency = CPUFREQ_TABLE_END;
+
+	*opp_table = &freq_table[0];
+
+	dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus);
+
+	return ret;
+}
+
 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;
+	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->tables[clusterid])
+	if (clusterid >= data->soc->num_clusters || !data->bpmp_luts[clusterid])
 		return -EINVAL;
 
 	start_cpu = rounddown(policy->cpu, maxcpus_per_cluster);
@@ -387,9 +489,22 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
 		if (cpu_possible(cpu))
 			cpumask_set_cpu(cpu, policy->cpus);
 	}
-	policy->freq_table = data->tables[clusterid];
 	policy->cpuinfo.transition_latency = TEGRA_CPUFREQ_TRANSITION_LATENCY;
 
+	bpmp_lut = data->bpmp_luts[clusterid];
+
+	if (data->icc_dram_bw_scaling) {
+		ret = tegra_cpufreq_init_cpufreq_table(policy, bpmp_lut, &freq_table);
+		if (!ret) {
+			policy->freq_table = freq_table;
+			return 0;
+		}
+	}
+
+	data->icc_dram_bw_scaling = false;
+	policy->freq_table = bpmp_lut;
+	pr_info("OPP tables missing from DT, EMC frequency scaling disabled\n");
+
 	return 0;
 }
 
@@ -406,6 +521,9 @@ static int tegra194_cpufreq_set_target(struct cpufreq_policy *policy,
 	 */
 	data->soc->ops->set_cpu_ndiv(policy, (u64)tbl->driver_data);
 
+	if (data->icc_dram_bw_scaling)
+		tegra_cpufreq_set_bw(policy, tbl->frequency);
+
 	return 0;
 }
 
@@ -439,8 +557,8 @@ static void tegra194_cpufreq_free_resources(void)
 }
 
 static struct cpufreq_frequency_table *
-init_freq_table(struct platform_device *pdev, struct tegra_bpmp *bpmp,
-		unsigned int cluster_id)
+tegra_cpufreq_bpmp_read_lut(struct platform_device *pdev, struct tegra_bpmp *bpmp,
+			    unsigned int cluster_id)
 {
 	struct cpufreq_frequency_table *freq_table;
 	struct mrq_cpu_ndiv_limits_response resp;
@@ -515,6 +633,7 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 	const struct tegra_cpufreq_soc *soc;
 	struct tegra194_cpufreq_data *data;
 	struct tegra_bpmp *bpmp;
+	struct device *cpu_dev;
 	int err, i;
 
 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
@@ -530,9 +649,9 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	data->tables = devm_kcalloc(&pdev->dev, data->soc->num_clusters,
-				    sizeof(*data->tables), GFP_KERNEL);
-	if (!data->tables)
+	data->bpmp_luts = devm_kcalloc(&pdev->dev, data->soc->num_clusters,
+				       sizeof(*data->bpmp_luts), GFP_KERNEL);
+	if (!data->bpmp_luts)
 		return -ENOMEM;
 
 	if (soc->actmon_cntr_base) {
@@ -556,15 +675,26 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
 	}
 
 	for (i = 0; i < data->soc->num_clusters; i++) {
-		data->tables[i] = init_freq_table(pdev, bpmp, i);
-		if (IS_ERR(data->tables[i])) {
-			err = PTR_ERR(data->tables[i]);
+		data->bpmp_luts[i] = tegra_cpufreq_bpmp_read_lut(pdev, bpmp, i);
+		if (IS_ERR(data->bpmp_luts[i])) {
+			err = PTR_ERR(data->bpmp_luts[i]);
 			goto err_free_res;
 		}
 	}
 
 	tegra194_cpufreq_driver.driver_data = data;
 
+	/* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
+	cpu_dev = get_cpu_device(0);
+	if (!cpu_dev)
+		return -EPROBE_DEFER;
+
+	if (dev_pm_opp_of_get_opp_desc_node(cpu_dev)) {
+		err = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);
+		if (!err)
+			data->icc_dram_bw_scaling = true;
+	}
+
 	err = cpufreq_register_driver(&tegra194_cpufreq_driver);
 	if (!err)
 		goto put_bpmp;

drivers/cpufreq/tegra20-cpufreq.c

@@ -25,7 +25,7 @@ static bool cpu0_node_has_opp_v2_prop(void)
 	struct device_node *np = of_cpu_device_node_get(0);
 	bool ret = false;
 
-	if (of_get_property(np, "operating-points-v2", NULL))
+	if (of_property_present(np, "operating-points-v2"))
 		ret = true;
 
 	of_node_put(np);

include/acpi/cppc_acpi.h

@@ -109,6 +109,7 @@ struct cppc_perf_caps {
 	u32 lowest_freq;
 	u32 nominal_freq;
 	u32 energy_perf;
+	bool auto_sel;
 };
 
 struct cppc_perf_ctrls {
@@ -153,6 +154,8 @@ extern int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val);
 extern int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val);
 extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf);
 extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable);
+extern int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps);
+extern int cppc_set_auto_sel(int cpu, bool enable);
 #else /* !CONFIG_ACPI_CPPC_LIB */
 static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf)
 {
@@ -214,6 +217,14 @@ static inline int cppc_get_epp_perf(int cpunum, u64 *epp_perf)
 {
 	return -ENOTSUPP;
 }
+static inline int cppc_set_auto_sel(int cpu, bool enable)
+{
+	return -ENOTSUPP;
+}
+static inline int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps)
+{
+	return -ENOTSUPP;
+}
 #endif /* !CONFIG_ACPI_CPPC_LIB */
 
 #endif /* _CPPC_ACPI_H*/

include/linux/amd-pstate.h

@@ -97,6 +97,7 @@ enum amd_pstate_mode {
 	AMD_PSTATE_DISABLE = 0,
 	AMD_PSTATE_PASSIVE,
 	AMD_PSTATE_ACTIVE,
+	AMD_PSTATE_GUIDED,
 	AMD_PSTATE_MAX,
 };
 
@@ -104,6 +105,7 @@ static const char * const amd_pstate_mode_string[] = {
 	[AMD_PSTATE_DISABLE]     = "disable",
 	[AMD_PSTATE_PASSIVE]     = "passive",
 	[AMD_PSTATE_ACTIVE]      = "active",
+	[AMD_PSTATE_GUIDED]      = "guided",
 	NULL,
 };
 #endif /* _LINUX_AMD_PSTATE_H */

include/linux/cpufreq.h

@@ -237,6 +237,7 @@ bool cpufreq_supports_freq_invariance(void);
 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
+bool has_target_index(void);
 #else
 static inline unsigned int cpufreq_get(unsigned int cpu)
 {