^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * processor_thermal.c - Passive cooling submodule of the ACPI processor driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * - Added processor hotplug support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/cpufreq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <acpi/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define PREFIX "ACPI: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define ACPI_PROCESSOR_CLASS "processor"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #ifdef CONFIG_CPU_FREQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /* If a passive cooling situation is detected, primarily CPUfreq is used, as it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * offers (in most cases) voltage scaling in addition to frequency scaling, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * thus a cubic (instead of linear) reduction of energy. Also, we allow for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * _any_ cpufreq driver and not only the acpi-cpufreq driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define CPUFREQ_THERMAL_MIN_STEP 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define CPUFREQ_THERMAL_MAX_STEP 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static DEFINE_PER_CPU(unsigned int, cpufreq_thermal_reduction_pctg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define reduction_pctg(cpu) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) per_cpu(cpufreq_thermal_reduction_pctg, phys_package_first_cpu(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * Emulate "per package data" using per cpu data (which should really be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * provided elsewhere)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Note we can lose a CPU on cpu hotunplug, in this case we forget the state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * temporarily. Fortunately that's not a big issue here (I hope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int phys_package_first_cpu(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int id = topology_physical_package_id(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) for_each_online_cpu(i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (topology_physical_package_id(i) == id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int cpu_has_cpufreq(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct cpufreq_policy policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!acpi_processor_cpufreq_init || cpufreq_get_policy(&policy, cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int cpufreq_get_max_state(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (!cpu_has_cpufreq(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return CPUFREQ_THERMAL_MAX_STEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static int cpufreq_get_cur_state(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (!cpu_has_cpufreq(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return reduction_pctg(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int cpufreq_set_cur_state(unsigned int cpu, int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct cpufreq_policy *policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long max_freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (!cpu_has_cpufreq(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) reduction_pctg(cpu) = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * Update all the CPUs in the same package because they all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * contribute to the temperature and often share the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * frequency.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) for_each_online_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (topology_physical_package_id(i) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) topology_physical_package_id(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) pr = per_cpu(processors, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (unlikely(!freq_qos_request_active(&pr->thermal_req)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) policy = cpufreq_cpu_get(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (!policy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) max_freq = (policy->cpuinfo.max_freq * (100 - reduction_pctg(i) * 20)) / 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) cpufreq_cpu_put(policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ret = freq_qos_update_request(&pr->thermal_req, max_freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) pr_warn("Failed to update thermal freq constraint: CPU%d (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pr->id, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) for_each_cpu(cpu, policy->related_cpus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct acpi_processor *pr = per_cpu(processors, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = freq_qos_add_request(&policy->constraints,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) &pr->thermal_req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) FREQ_QOS_MAX, INT_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) pr_err("Failed to add freq constraint for CPU%d (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) cpu, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) for_each_cpu(cpu, policy->related_cpus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct acpi_processor *pr = per_cpu(processors, policy->cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) freq_qos_remove_request(&pr->thermal_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #else /* ! CONFIG_CPU_FREQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int cpufreq_get_max_state(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int cpufreq_get_cur_state(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int cpufreq_set_cur_state(unsigned int cpu, int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* thermal cooling device callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int acpi_processor_max_state(struct acpi_processor *pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int max_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * There exists four states according to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * cpufreq_thermal_reduction_pctg. 0, 1, 2, 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) max_state += cpufreq_get_max_state(pr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (pr->flags.throttling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) max_state += (pr->throttling.state_count -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return max_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) processor_get_max_state(struct thermal_cooling_device *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) unsigned long *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct acpi_device *device = cdev->devdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) *state = acpi_processor_max_state(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) processor_get_cur_state(struct thermal_cooling_device *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) unsigned long *cur_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct acpi_device *device = cdev->devdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) *cur_state = cpufreq_get_cur_state(pr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (pr->flags.throttling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) *cur_state += pr->throttling.state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) processor_set_cur_state(struct thermal_cooling_device *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) unsigned long state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct acpi_device *device = cdev->devdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int max_pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) max_pstate = cpufreq_get_max_state(pr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (state > acpi_processor_max_state(pr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (state <= max_pstate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (pr->flags.throttling && pr->throttling.state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) result = acpi_processor_set_throttling(pr, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) cpufreq_set_cur_state(pr->id, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) cpufreq_set_cur_state(pr->id, max_pstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) result = acpi_processor_set_throttling(pr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) state - max_pstate, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) const struct thermal_cooling_device_ops processor_cooling_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) .get_max_state = processor_get_max_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) .get_cur_state = processor_get_cur_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) .set_cur_state = processor_set_cur_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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