| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/cpufreq/ |
| D | apple,cluster-cpufreq.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/apple,cluster-cpufreq.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Apple SoC cluster cpufreq device
10 - Hector Martin <marcan@marcan.st>
13 Apple SoCs (e.g. M1) have a per-cpu-cluster DVFS controller that is part of
14 the cluster management register block. This binding uses the standard
15 operating-points-v2 table to define the CPU performance states, with the
16 opp-level property specifying the hardware p-state index for that level.
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| D | cpufreq-qcom-hw.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm Technologies, Inc. CPUFREQ
10 - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
14 CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
21 - description: v1 of CPUFREQ HW
23 - enum:
24 - qcom,qcm2290-cpufreq-hw
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| D | cpufreq-mediatek.txt | 1 Binding for MediaTek's CPUFreq driver
5 - clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names.
6 - clock-names: Should contain the following:
7 "cpu" - The multiplexer for clock input of CPU cluster.
8 "intermediate" - A parent of "cpu" clock which is used as "intermediate" clock
11 Please refer to Documentation/devicetree/bindings/clock/clock-bindings.txt for
13 - operating-points-v2: Please refer to Documentation/devicetree/bindings/opp/opp-v2.yaml
15 - proc-supply: Regulator for Vproc of CPU cluster.
18 - sram-supply: Regulator for Vsram of CPU cluster. When present, the cpufreq driver
23 - mediatek,cci:
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| /kernel/linux/linux-6.6/arch/arm64/boot/dts/apple/ |
| D | t600x-dieX.dtsi | 1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
9 DIE_NODE(cpufreq_e): cpufreq@210e20000 {
10 …compatible = "apple,t6000-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq";
12 #performance-domain-cells = <0>;
15 DIE_NODE(cpufreq_p0): cpufreq@211e20000 {
16 …compatible = "apple,t6000-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq";
18 #performance-domain-cells = <0>;
21 DIE_NODE(cpufreq_p1): cpufreq@212e20000 {
22 …compatible = "apple,t6000-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq";
24 #performance-domain-cells = <0>;
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| /kernel/linux/linux-6.6/drivers/cpufreq/ |
| D | vexpress-spc-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Versatile Express SPC CPUFreq Interface driver
5 * Copyright (C) 2013 - 2019 ARM Ltd.
16 #include <linux/cpufreq.h>
45 #define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq) argument
46 #define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq) argument
71 static unsigned int find_cluster_maxfreq(int cluster) in find_cluster_maxfreq() argument
79 if (cluster == per_cpu(physical_cluster, j) && in find_cluster_maxfreq()
138 ret = -EIO; in ve_spc_cpufreq_set_rate()
154 /* Recalc freq for old cluster when switching clusters */ in ve_spc_cpufreq_set_rate()
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| D | apple-soc-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Apple SoC CPU cluster performance state driver
7 * Based on scpi-cpufreq.c
13 #include <linux/cpufreq.h>
90 .compatible = "apple,t8103-cluster-cpufreq",
94 .compatible = "apple,t8112-cluster-cpufreq",
98 .compatible = "apple,cluster-cpufreq",
107 struct apple_cpu_priv *priv = policy->driver_data; in apple_soc_cpufreq_get_rate()
111 if (priv->info->cur_pstate_mask) { in apple_soc_cpufreq_get_rate()
112 u64 reg = readq_relaxed(priv->reg_base + APPLE_DVFS_STATUS); in apple_soc_cpufreq_get_rate()
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| D | tegra186-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/cpufreq.h>
7 #include <linux/dma-mapping.h>
13 #include <soc/tegra/bpmp-abi.h>
28 /* CPU0 - A57 Cluster */
33 /* CPU1 - Denver Cluster */
38 /* CPU2 - Denver Cluster */
43 /* CPU3 - A57 Cluster */
48 /* CPU4 - A57 Cluster */
53 /* CPU5 - A57 Cluster */
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| D | tegra194-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2020 - 2022, NVIDIA CORPORATION. All rights reserved
7 #include <linux/cpufreq.h>
9 #include <linux/dma-mapping.h>
20 #include <soc/tegra/bpmp-abi.h>
32 #define SCRATCH_FREQ_CORE_REG(data, cpu) (data->regs + CMU_CLKS_BASE + CORE_OFFSET(cpu))
36 (data->regs + (MMCRAB_CLUSTER_BASE(cl) + data->soc->actmon_cntr_base))
39 /* cpufreq transisition latency */
83 dev = get_cpu_device(policy->cpu); in tegra_cpufreq_set_bw()
85 return -ENODEV; in tegra_cpufreq_set_bw()
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| D | armada-8k-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * CPUFreq support for Armada 8K
25 { .compatible = "marvell,ap806-cpu-clock" },
26 { .compatible = "marvell,ap807-cpu-clock" },
44 /* If the CPUs share the same clock, then they are in the same cluster. */
84 return -EINVAL; in armada_8k_add_opp()
141 return -ENODEV; in armada_8k_cpufreq_init()
148 return -ENOMEM; in armada_8k_cpufreq_init()
190 armada_8k_pdev = platform_device_register_simple("cpufreq-dt", -1, in armada_8k_cpufreq_init()
216 MODULE_DESCRIPTION("Armada 8K cpufreq driver");
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| D | qoriq-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/clk-provider.h>
12 #include <linux/cpufreq.h>
34 * struct soc_data - SoC specific data
48 /* get platform freq by searching bus-frequency property */ in get_bus_freq()
51 ret = of_property_read_u32(soc, "bus-frequency", &sysfreq); in get_bus_freq()
58 pltclk = clk_get(NULL, "cg-pll0-div1"); in get_bus_freq()
88 struct cpumask *dstp = policy->cpus; in set_affected_cpus()
99 if (clk_is_match(policy->clk, clk)) in set_affected_cpus()
131 for (i = 0; i < count - 1; i++) { in freq_table_sort()
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| /kernel/linux/linux-5.10/drivers/cpufreq/ |
| D | vexpress-spc-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Versatile Express SPC CPUFreq Interface driver
5 * Copyright (C) 2013 - 2019 ARM Ltd.
16 #include <linux/cpufreq.h>
47 #define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq) argument
48 #define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq) argument
74 static unsigned int find_cluster_maxfreq(int cluster) in find_cluster_maxfreq() argument
82 if (cluster == per_cpu(physical_cluster, j) && in find_cluster_maxfreq()
141 ret = -EIO; in ve_spc_cpufreq_set_rate()
157 /* Recalc freq for old cluster when switching clusters */ in ve_spc_cpufreq_set_rate()
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| D | tegra186-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/cpufreq.h>
7 #include <linux/dma-mapping.h>
13 #include <soc/tegra/bpmp-abi.h>
26 #define NO_CPU -1
28 /* Denver cluster */
34 /* A57 cluster */
61 for (i = 0; i < data->num_clusters; i++) { in tegra186_cpufreq_init()
62 struct tegra186_cpufreq_cluster *cluster = &data->clusters[i]; in tegra186_cpufreq_init() local
64 cluster->info; in tegra186_cpufreq_init()
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| D | tegra194-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/cpufreq.h>
9 #include <linux/dma-mapping.h>
19 #include <soc/tegra/bpmp-abi.h>
28 /* cpufreq transisition latency */
31 enum cluster { enum
59 static void get_cpu_cluster(void *cluster) in get_cpu_cluster() argument
63 *((uint32_t *)cluster) = MPIDR_AFFINITY_LEVEL(mpidr, 1); in get_cpu_cluster()
67 * Read per-core Read-only system register NVFREQ_FEEDBACK_EL1.
87 return nltbl->ref_clk_hz / KHZ * ndiv / (nltbl->pdiv * nltbl->mdiv); in map_ndiv_to_freq()
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| D | armada-8k-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * CPUFreq support for Armada 8K
37 /* If the CPUs share the same clock, then they are in the same cluster. */
77 return -EINVAL; in armada_8k_add_opp()
130 node = of_find_compatible_node(NULL, NULL, "marvell,ap806-cpu-clock"); in armada_8k_cpufreq_init()
133 return -ENODEV; in armada_8k_cpufreq_init()
140 return -ENOMEM; in armada_8k_cpufreq_init()
182 armada_8k_pdev = platform_device_register_simple("cpufreq-dt", -1, in armada_8k_cpufreq_init()
208 { .compatible = "marvell,ap806-cpu-clock" },
214 MODULE_DESCRIPTION("Armada 8K cpufreq driver");
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/cpufreq/ |
| D | cpufreq-qcom-hw.txt | 1 Qualcomm Technologies, Inc. CPUFREQ Bindings
3 CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI)
8 - compatible
11 Definition: must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
13 - clocks
18 - clock-names
23 - reg
25 Value type: <prop-encoded-array>
28 - reg-names
32 "freq-domain0", "freq-domain1".
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| D | cpufreq-mediatek.txt | 1 Binding for MediaTek's CPUFreq driver
5 - clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names.
6 - clock-names: Should contain the following:
7 "cpu" - The multiplexer for clock input of CPU cluster.
8 "intermediate" - A parent of "cpu" clock which is used as "intermediate" clock
11 Please refer to Documentation/devicetree/bindings/clock/clock-bindings.txt for
13 - operating-points-v2: Please refer to Documentation/devicetree/bindings/opp/opp.txt
15 - proc-supply: Regulator for Vproc of CPU cluster.
18 - sram-supply: Regulator for Vsram of CPU cluster. When present, the cpufreq driver
23 - #cooling-cells:
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| /kernel/linux/linux-5.10/Documentation/driver-api/thermal/ |
| D | cpu-cooling-api.rst | 21 1.1 cpufreq registration/unregistration APIs
22 --------------------------------------------
29 This interface function registers the cpufreq cooling device with the name
30 "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
41 This interface function registers the cpufreq cooling device with
42 the name "thermal-cpufreq-%x" linking it with a device tree node, in
44 instances of cpufreq cooling devices.
47 CPUFreq policy.
54 This interface function unregisters the "thermal-cpufreq-%x" cooling device.
63 supported currently). This power model requires that the operating-points of
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| D | cpu-idle-cooling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 ----------
26 budget lower than the requested one and under-utilize the CPU, thus
27 losing performance. In other words, one OPP under-utilizes the CPU
33 ----------
42 the control precision of cpufreq, however different vendors have a
48 belong to the same cluster, with a duration greater than the cluster
58 ---------------
63 cpufreq. Ideally, if all CPUs belonging to the same cluster, inject
64 their idle cycles synchronously, the cluster can reach its power down
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| /kernel/linux/linux-6.6/Documentation/driver-api/thermal/ |
| D | cpu-cooling-api.rst | 21 1.1 cpufreq registration/unregistration APIs
22 --------------------------------------------
29 This interface function registers the cpufreq cooling device with the name
30 "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
41 This interface function registers the cpufreq cooling device with
42 the name "thermal-cpufreq-%x" linking it with a device tree node, in
44 instances of cpufreq cooling devices.
47 CPUFreq policy.
54 This interface function unregisters the "thermal-cpufreq-%x" cooling device.
63 supported currently). This power model requires that the operating-points of
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| D | cpu-idle-cooling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 ----------
26 budget lower than the requested one and under-utilize the CPU, thus
27 losing performance. In other words, one OPP under-utilizes the CPU
33 ----------
42 the control precision of cpufreq, however different vendors have a
48 belong to the same cluster, with a duration greater than the cluster
58 ---------------
63 cpufreq. Ideally, if all CPUs belonging to the same cluster, inject
64 their idle cycles synchronously, the cluster can reach its power down
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| /kernel/linux/linux-6.6/Documentation/admin-guide/pm/ |
| D | intel_uncore_frequency_scaling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 :Copyright: |copy| 2022-2023 Intel Corporation
13 ------------
22 the scaling min/max frequencies via cpufreq sysfs to improve CPU performance.
26 use both cpufreq and the uncore scaling interface to distribute power and
30 ---------------
45 This is a read-only attribute. If users adjust max_freq_khz,
50 This is a read-only attribute. If users adjust min_freq_khz,
63 -----------------------------------------------------------------
66 of mesh partitions. This partition is called fabric cluster.
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| /kernel/linux/linux-6.6/drivers/base/ |
| D | arch_topology.c | 1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/cpufreq.h>
49 * either cpufreq or counter driven. If the support status changes as in update_scale_freq_invariant()
67 * supported by cpufreq. in topology_set_scale_freq_source()
78 if (!sfd || sfd->source != SCALE_FREQ_SOURCE_ARCH) { in topology_set_scale_freq_source()
101 if (sfd && sfd->source == source) { in topology_clear_scale_freq_source()
111 * use-after-free races. in topology_clear_scale_freq_source()
124 sfd->set_freq_scale(); in topology_scale_freq_tick()
141 * want to update the scale factor with information from CPUFREQ. in topology_set_freq_scale()
164 * topology_update_thermal_pressure() - Update thermal pressure for CPUs
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| /kernel/linux/linux-5.10/drivers/base/ |
| D | arch_topology.c | 1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/cpufreq.h>
47 * want to update the scale factor with information from CPUFREQ. in topology_set_freq_scale()
83 return sysfs_emit(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id)); in cpu_capacity_show()
118 * Updating the sched_domains can't be done directly from cpufreq callbacks
176 ret = of_property_read_u32(cpu_node, "capacity-dmips-mhz", in topology_parse_cpu_capacity()
194 * For non-clk CPU DVFS mechanism, there's no way to get the in topology_parse_cpu_capacity()
237 cpumask_pr_args(policy->related_cpus), in init_cpu_capacity_callback()
240 cpumask_andnot(cpus_to_visit, cpus_to_visit, policy->related_cpus); in init_cpu_capacity_callback()
242 for_each_cpu(cpu, policy->related_cpus) in init_cpu_capacity_callback()
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| /kernel/linux/linux-5.10/kernel/sched/ |
| D | walt.c | 1 // SPDX-License-Identifier: GPL-2.0
19 #include <linux/cpufreq.h>
90 raw_spin_lock(&cpu_rq(cpu)->lock); in acquire_rq_locks_irqsave()
92 raw_spin_lock_nested(&cpu_rq(cpu)->lock, level); in acquire_rq_locks_irqsave()
103 raw_spin_unlock(&cpu_rq(cpu)->lock); in release_rq_locks_irqrestore()
121 /* 1 -> use PELT based load stats, 0 -> use window-based load stats */
151 * A after-boot constant divisor for cpu_util_freq_walt() to apply the load
174 unsigned int max_capacity = 1024; /* max(rq->capacity) */
175 unsigned int min_capacity = 1024; /* min(rq->capacity) */
176 unsigned int max_possible_capacity = 1024; /* max(rq->max_possible_capacity) */
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| /kernel/linux/linux-6.6/kernel/sched/ |
| D | walt.c | 1 // SPDX-License-Identifier: GPL-2.0
19 #include <linux/cpufreq.h>
91 raw_spin_lock(&cpu_rq(cpu)->__lock); in acquire_rq_locks_irqsave()
93 raw_spin_lock_nested(&cpu_rq(cpu)->__lock, level); in acquire_rq_locks_irqsave()
104 raw_spin_unlock(&cpu_rq(cpu)->__lock); in release_rq_locks_irqrestore()
122 /* 1 -> use PELT based load stats, 0 -> use window-based load stats */
152 * A after-boot constant divisor for cpu_util_freq_walt() to apply the load
175 unsigned int max_capacity = 1024; /* max(rq->capacity) */
176 unsigned int min_capacity = 1024; /* min(rq->capacity) */
177 unsigned int max_possible_capacity = 1024; /* max(rq->max_possible_capacity) */
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