diff options
Diffstat (limited to 'drivers/cpufreq')
81 files changed, 550 insertions, 605 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index f8129edc145e..56c31a78c692 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -93,6 +93,15 @@ config ARM_IMX6Q_CPUFREQ If in doubt, say N. +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. + + If in doubt, say N. + config ARM_KIRKWOOD_CPUFREQ def_bool MACH_KIRKWOOD help @@ -133,6 +142,14 @@ config ARM_QCOM_CPUFREQ_HW The driver implements the cpufreq interface for this HW engine. Say Y if you want to support CPUFreq HW. +config ARM_RASPBERRYPI_CPUFREQ + tristate "Raspberry Pi cpufreq support" + depends on CLK_RASPBERRYPI || COMPILE_TEST + help + This adds the CPUFreq driver for Raspberry Pi + + If in doubt, say N. + config ARM_S3C_CPUFREQ bool help diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 689b26c6f949..5a6c70d26c98 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_ACPI_CPPC_CPUFREQ) += cppc_cpufreq.o obj-$(CONFIG_ARCH_DAVINCI) += davinci-cpufreq.o obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o +obj-$(CONFIG_ARM_IMX_CPUFREQ_DT) += imx-cpufreq-dt.o obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o obj-$(CONFIG_ARM_MEDIATEK_CPUFREQ) += mediatek-cpufreq.o obj-$(CONFIG_MACH_MVEBU_V7) += mvebu-cpufreq.o @@ -64,6 +65,7 @@ obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW) += qcom-cpufreq-hw.o obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o +obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) += raspberrypi-cpufreq.o obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 73bb2aafb1a8..d6f7df33ab8c 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * acpi-cpufreq.c - ACPI Processor P-States Driver * @@ -5,24 +6,6 @@ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de> * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c index 6927a8c0e748..e2df9d112106 100644 --- a/drivers/cpufreq/amd_freq_sensitivity.c +++ b/drivers/cpufreq/amd_freq_sensitivity.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * amd_freq_sensitivity.c: AMD frequency sensitivity feedback powersave bias * for the ondemand governor. @@ -5,10 +6,6 @@ * Copyright (C) 2013 Advanced Micro Devices, Inc. * * Author: Jacob Shin <jacob.shin@amd.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/kernel.h> diff --git a/drivers/cpufreq/armada-37xx-cpufreq.c b/drivers/cpufreq/armada-37xx-cpufreq.c index 0df16eb1eb3c..aa0f06dec959 100644 --- a/drivers/cpufreq/armada-37xx-cpufreq.c +++ b/drivers/cpufreq/armada-37xx-cpufreq.c @@ -257,7 +257,7 @@ static void __init armada37xx_cpufreq_avs_configure(struct regmap *base, static void __init armada37xx_cpufreq_avs_setup(struct regmap *base, struct armada_37xx_dvfs *dvfs) { - unsigned int avs_val = 0, freq; + unsigned int avs_val = 0; int load_level = 0; if (base == NULL) @@ -275,8 +275,6 @@ static void __init armada37xx_cpufreq_avs_setup(struct regmap *base, for (load_level = 1; load_level < LOAD_LEVEL_NR; load_level++) { - freq = dvfs->cpu_freq_max / dvfs->divider[load_level]; - avs_val = dvfs->avs[load_level]; regmap_update_bits(base, ARMADA_37XX_AVS_VSET(load_level-1), ARMADA_37XX_AVS_VDD_MASK << ARMADA_37XX_AVS_HIGH_VDD_LIMIT | diff --git a/drivers/cpufreq/bmips-cpufreq.c b/drivers/cpufreq/bmips-cpufreq.c index 56a4ebbf00e0..f7c23fa468f0 100644 --- a/drivers/cpufreq/bmips-cpufreq.c +++ b/drivers/cpufreq/bmips-cpufreq.c @@ -131,23 +131,18 @@ static int bmips_cpufreq_exit(struct cpufreq_policy *policy) static int bmips_cpufreq_init(struct cpufreq_policy *policy) { struct cpufreq_frequency_table *freq_table; - int ret; freq_table = bmips_cpufreq_get_freq_table(policy); if (IS_ERR(freq_table)) { - ret = PTR_ERR(freq_table); - pr_err("%s: couldn't determine frequency table (%d).\n", - BMIPS_CPUFREQ_NAME, ret); - return ret; + pr_err("%s: couldn't determine frequency table (%ld).\n", + BMIPS_CPUFREQ_NAME, PTR_ERR(freq_table)); + return PTR_ERR(freq_table); } - ret = cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY); - if (ret) - bmips_cpufreq_exit(policy); - else - pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME); + cpufreq_generic_init(policy, freq_table, TRANSITION_LATENCY); + pr_info("%s: registered\n", BMIPS_CPUFREQ_NAME); - return ret; + return 0; } static struct cpufreq_driver bmips_cpufreq_driver = { diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c index e6f9cbe5835f..77b0e5d0fb13 100644 --- a/drivers/cpufreq/brcmstb-avs-cpufreq.c +++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c @@ -384,12 +384,12 @@ static int brcm_avs_set_pstate(struct private_data *priv, unsigned int pstate) return __issue_avs_command(priv, AVS_CMD_SET_PSTATE, true, args); } -static unsigned long brcm_avs_get_voltage(void __iomem *base) +static u32 brcm_avs_get_voltage(void __iomem *base) { return readl(base + AVS_MBOX_VOLTAGE1); } -static unsigned long brcm_avs_get_frequency(void __iomem *base) +static u32 brcm_avs_get_frequency(void __iomem *base) { return readl(base + AVS_MBOX_FREQUENCY) * 1000; /* in kHz */ } @@ -446,8 +446,8 @@ static bool brcm_avs_is_firmware_loaded(struct private_data *priv) rc = brcm_avs_get_pmap(priv, NULL); magic = readl(priv->base + AVS_MBOX_MAGIC); - return (magic == AVS_FIRMWARE_MAGIC) && (rc != -ENOTSUPP) && - (rc != -EINVAL); + return (magic == AVS_FIRMWARE_MAGIC) && ((rc != -ENOTSUPP) || + (rc != -EINVAL)); } static unsigned int brcm_avs_cpufreq_get(unsigned int cpu) @@ -653,14 +653,14 @@ static ssize_t show_brcm_avs_voltage(struct cpufreq_policy *policy, char *buf) { struct private_data *priv = policy->driver_data; - return sprintf(buf, "0x%08lx\n", brcm_avs_get_voltage(priv->base)); + return sprintf(buf, "0x%08x\n", brcm_avs_get_voltage(priv->base)); } static ssize_t show_brcm_avs_frequency(struct cpufreq_policy *policy, char *buf) { struct private_data *priv = policy->driver_data; - return sprintf(buf, "0x%08lx\n", brcm_avs_get_frequency(priv->base)); + return sprintf(buf, "0x%08x\n", brcm_avs_get_frequency(priv->base)); } cpufreq_freq_attr_ro(brcm_avs_pstate); diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 2ae978d27e61..8d8da763adc5 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * CPPC (Collaborative Processor Performance Control) driver for * interfacing with the CPUfreq layer and governors. See @@ -5,11 +6,6 @@ * * (C) Copyright 2014, 2015 Linaro Ltd. * Author: Ashwin Chaugule <ashwin.chaugule@linaro.org> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 - * of the License. */ #define pr_fmt(fmt) "CPPC Cpufreq:" fmt diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 47729a22c159..03dc4244ab00 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2016 Linaro. * Viresh Kumar <viresh.kumar@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/err.h> @@ -40,7 +37,6 @@ static const struct of_device_id whitelist[] __initconst = { { .compatible = "fsl,imx27", }, { .compatible = "fsl,imx51", }, { .compatible = "fsl,imx53", }, - { .compatible = "fsl,imx7d", }, { .compatible = "marvell,berlin", }, { .compatible = "marvell,pxa250", }, @@ -108,6 +104,10 @@ static const struct of_device_id blacklist[] __initconst = { { .compatible = "calxeda,highbank", }, { .compatible = "calxeda,ecx-2000", }, + { .compatible = "fsl,imx7d", }, + { .compatible = "fsl,imx8mq", }, + { .compatible = "fsl,imx8mm", }, + { .compatible = "marvell,armadaxp", }, { .compatible = "mediatek,mt2701", }, diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index bde28878725b..d2b5f062a07b 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Freescale Semiconductor, Inc. * * Copyright (C) 2014 Linaro. * Viresh Kumar <viresh.kumar@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/cpufreq-dt.h b/drivers/cpufreq/cpufreq-dt.h index d5aeea13433e..a5a45b547d0b 100644 --- a/drivers/cpufreq/cpufreq-dt.h +++ b/drivers/cpufreq/cpufreq-dt.h @@ -1,10 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2016 Linaro * Viresh Kumar <viresh.kumar@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #ifndef __CPUFREQ_DT_H__ diff --git a/drivers/cpufreq/cpufreq-nforce2.c b/drivers/cpufreq/cpufreq-nforce2.c index 33c309a08c64..cd53272e2fa2 100644 --- a/drivers/cpufreq/cpufreq-nforce2.c +++ b/drivers/cpufreq/cpufreq-nforce2.c @@ -1,7 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2004-2006 Sebastian Witt <se.witt@gmx.net> * - * Licensed under the terms of the GNU GPL License version 2. * Based upon reverse engineered information * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 85ff958e01f1..8dda62367816 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/cpufreq/cpufreq.c * @@ -9,10 +10,6 @@ * Added handling for CPU hotplug * Feb 2006 - Jacob Shin <jacob.shin@amd.com> * Fix handling for CPU hotplug -- affected CPUs - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -26,6 +23,7 @@ #include <linux/kernel_stat.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/pm_qos.h> #include <linux/slab.h> #include <linux/suspend.h> #include <linux/syscore_ops.h> @@ -161,7 +159,7 @@ EXPORT_SYMBOL_GPL(arch_set_freq_scale); * - set policies transition latency * - policy->cpus with all possible CPUs */ -int cpufreq_generic_init(struct cpufreq_policy *policy, +void cpufreq_generic_init(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table, unsigned int transition_latency) { @@ -173,8 +171,6 @@ int cpufreq_generic_init(struct cpufreq_policy *policy, * share the clock and voltage and clock. */ cpumask_setall(policy->cpus); - - return 0; } EXPORT_SYMBOL_GPL(cpufreq_generic_init); @@ -359,12 +355,10 @@ static void cpufreq_notify_transition(struct cpufreq_policy *policy, * which is not equal to what the cpufreq core thinks is * "old frequency". */ - if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) { - if (policy->cur && (policy->cur != freqs->old)) { - pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n", - freqs->old, policy->cur); - freqs->old = policy->cur; - } + if (policy->cur && policy->cur != freqs->old) { + pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n", + freqs->old, policy->cur); + freqs->old = policy->cur; } srcu_notifier_call_chain(&cpufreq_transition_notifier_list, @@ -634,7 +628,7 @@ static int cpufreq_parse_policy(char *str_governor, } /** - * cpufreq_parse_governor - parse a governor string only for !setpolicy + * cpufreq_parse_governor - parse a governor string only for has_target() */ static int cpufreq_parse_governor(char *str_governor, struct cpufreq_policy *policy) @@ -719,23 +713,15 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf) static ssize_t store_##file_name \ (struct cpufreq_policy *policy, const char *buf, size_t count) \ { \ - int ret, temp; \ - struct cpufreq_policy new_policy; \ + unsigned long val; \ + int ret; \ \ - memcpy(&new_policy, policy, sizeof(*policy)); \ - new_policy.min = policy->user_policy.min; \ - new_policy.max = policy->user_policy.max; \ - \ - ret = sscanf(buf, "%u", &new_policy.object); \ + ret = sscanf(buf, "%lu", &val); \ if (ret != 1) \ return -EINVAL; \ \ - temp = new_policy.object; \ - ret = cpufreq_set_policy(policy, &new_policy); \ - if (!ret) \ - policy->user_policy.object = temp; \ - \ - return ret ? ret : count; \ + ret = dev_pm_qos_update_request(policy->object##_freq_req, val);\ + return ret >= 0 ? count : ret; \ } store_one(scaling_min_freq, min); @@ -1001,7 +987,7 @@ static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int cpu) { struct device *dev = get_cpu_device(cpu); - if (!dev) + if (unlikely(!dev)) return; if (cpumask_test_and_set_cpu(cpu, policy->real_cpus)) @@ -1117,20 +1103,79 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp return ret; } +void refresh_frequency_limits(struct cpufreq_policy *policy) +{ + struct cpufreq_policy new_policy; + + if (!policy_is_inactive(policy)) { + new_policy = *policy; + pr_debug("updating policy for CPU %u\n", policy->cpu); + + cpufreq_set_policy(policy, &new_policy); + } +} +EXPORT_SYMBOL(refresh_frequency_limits); + static void handle_update(struct work_struct *work) { struct cpufreq_policy *policy = container_of(work, struct cpufreq_policy, update); - unsigned int cpu = policy->cpu; - pr_debug("handle_update for cpu %u called\n", cpu); - cpufreq_update_policy(cpu); + + pr_debug("handle_update for cpu %u called\n", policy->cpu); + down_write(&policy->rwsem); + refresh_frequency_limits(policy); + up_write(&policy->rwsem); +} + +static int cpufreq_notifier_min(struct notifier_block *nb, unsigned long freq, + void *data) +{ + struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_min); + + schedule_work(&policy->update); + return 0; +} + +static int cpufreq_notifier_max(struct notifier_block *nb, unsigned long freq, + void *data) +{ + struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_max); + + schedule_work(&policy->update); + return 0; +} + +static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy) +{ + struct kobject *kobj; + struct completion *cmp; + + down_write(&policy->rwsem); + cpufreq_stats_free_table(policy); + kobj = &policy->kobj; + cmp = &policy->kobj_unregister; + up_write(&policy->rwsem); + kobject_put(kobj); + + /* + * We need to make sure that the underlying kobj is + * actually not referenced anymore by anybody before we + * proceed with unloading. + */ + pr_debug("waiting for dropping of refcount\n"); + wait_for_completion(cmp); + pr_debug("wait complete\n"); } static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) { struct cpufreq_policy *policy; + struct device *dev = get_cpu_device(cpu); int ret; + if (!dev) + return NULL; + policy = kzalloc(sizeof(*policy), GFP_KERNEL); if (!policy) return NULL; @@ -1147,7 +1192,7 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, cpufreq_global_kobject, "policy%u", cpu); if (ret) { - pr_err("%s: failed to init policy->kobj: %d\n", __func__, ret); + dev_err(dev, "%s: failed to init policy->kobj: %d\n", __func__, ret); /* * The entire policy object will be freed below, but the extra * memory allocated for the kobject name needs to be freed by @@ -1157,6 +1202,25 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) goto err_free_real_cpus; } + policy->nb_min.notifier_call = cpufreq_notifier_min; + policy->nb_max.notifier_call = cpufreq_notifier_max; + + ret = dev_pm_qos_add_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); + if (ret) { + dev_err(dev, "Failed to register MIN QoS notifier: %d (%*pbl)\n", + ret, cpumask_pr_args(policy->cpus)); + goto err_kobj_remove; + } + + ret = dev_pm_qos_add_notifier(dev, &policy->nb_max, + DEV_PM_QOS_MAX_FREQUENCY); + if (ret) { + dev_err(dev, "Failed to register MAX QoS notifier: %d (%*pbl)\n", + ret, cpumask_pr_args(policy->cpus)); + goto err_min_qos_notifier; + } + INIT_LIST_HEAD(&policy->policy_list); init_rwsem(&policy->rwsem); spin_lock_init(&policy->transition_lock); @@ -1167,6 +1231,11 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) policy->cpu = cpu; return policy; +err_min_qos_notifier: + dev_pm_qos_remove_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); +err_kobj_remove: + cpufreq_policy_put_kobj(policy); err_free_real_cpus: free_cpumask_var(policy->real_cpus); err_free_rcpumask: @@ -1179,30 +1248,9 @@ err_free_policy: return NULL; } -static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy) -{ - struct kobject *kobj; - struct completion *cmp; - - down_write(&policy->rwsem); - cpufreq_stats_free_table(policy); - kobj = &policy->kobj; - cmp = &policy->kobj_unregister; - up_write(&policy->rwsem); - kobject_put(kobj); - - /* - * We need to make sure that the underlying kobj is - * actually not referenced anymore by anybody before we - * proceed with unloading. - */ - pr_debug("waiting for dropping of refcount\n"); - wait_for_completion(cmp); - pr_debug("wait complete\n"); -} - static void cpufreq_policy_free(struct cpufreq_policy *policy) { + struct device *dev = get_cpu_device(policy->cpu); unsigned long flags; int cpu; @@ -1214,6 +1262,14 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy) per_cpu(cpufreq_cpu_data, cpu) = NULL; write_unlock_irqrestore(&cpufreq_driver_lock, flags); + dev_pm_qos_remove_notifier(dev, &policy->nb_max, + DEV_PM_QOS_MAX_FREQUENCY); + dev_pm_qos_remove_notifier(dev, &policy->nb_min, + DEV_PM_QOS_MIN_FREQUENCY); + dev_pm_qos_remove_request(policy->max_freq_req); + dev_pm_qos_remove_request(policy->min_freq_req); + kfree(policy->min_freq_req); + cpufreq_policy_put_kobj(policy); free_cpumask_var(policy->real_cpus); free_cpumask_var(policy->related_cpus); @@ -1291,19 +1347,53 @@ static int cpufreq_online(unsigned int cpu) cpumask_and(policy->cpus, policy->cpus, cpu_online_mask); if (new_policy) { - policy->user_policy.min = policy->min; - policy->user_policy.max = policy->max; + struct device *dev = get_cpu_device(cpu); for_each_cpu(j, policy->related_cpus) { per_cpu(cpufreq_cpu_data, j) = policy; add_cpu_dev_symlink(policy, j); } - } else { - policy->min = policy->user_policy.min; - policy->max = policy->user_policy.max; + + policy->min_freq_req = kzalloc(2 * sizeof(*policy->min_freq_req), + GFP_KERNEL); + if (!policy->min_freq_req) + goto out_destroy_policy; + + ret = dev_pm_qos_add_request(dev, policy->min_freq_req, + DEV_PM_QOS_MIN_FREQUENCY, + policy->min); + if (ret < 0) { + /* + * So we don't call dev_pm_qos_remove_request() for an + * uninitialized request. + */ + kfree(policy->min_freq_req); + policy->min_freq_req = NULL; + + dev_err(dev, "Failed to add min-freq constraint (%d)\n", + ret); + goto out_destroy_policy; + } + + /* + * This must be initialized right here to avoid calling + * dev_pm_qos_remove_request() on uninitialized request in case + * of errors. + */ + policy->max_freq_req = policy->min_freq_req + 1; + + ret = dev_pm_qos_add_request(dev, policy->max_freq_req, + DEV_PM_QOS_MAX_FREQUENCY, + policy->max); + if (ret < 0) { + policy->max_freq_req = NULL; + dev_err(dev, "Failed to add max-freq constraint (%d)\n", + ret); + goto out_destroy_policy; + } } - if (cpufreq_driver->get && !cpufreq_driver->setpolicy) { + if (cpufreq_driver->get && has_target()) { policy->cur = cpufreq_driver->get(policy->cpu); if (!policy->cur) { pr_err("%s: ->get() failed\n", __func__); @@ -1378,8 +1468,7 @@ static int cpufreq_online(unsigned int cpu) if (cpufreq_driver->ready) cpufreq_driver->ready(policy); - if (IS_ENABLED(CONFIG_CPU_THERMAL) && - cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) + if (cpufreq_thermal_control_enabled(cpufreq_driver)) policy->cdev = of_cpufreq_cooling_register(policy); pr_debug("initialization complete\n"); @@ -1469,8 +1558,7 @@ static int cpufreq_offline(unsigned int cpu) goto unlock; } - if (IS_ENABLED(CONFIG_CPU_THERMAL) && - cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) { + if (cpufreq_thermal_control_enabled(cpufreq_driver)) { cpufreq_cooling_unregister(policy->cdev); policy->cdev = NULL; } @@ -1549,6 +1637,30 @@ static void cpufreq_out_of_sync(struct cpufreq_policy *policy, cpufreq_freq_transition_end(policy, &freqs, 0); } +static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, bool update) +{ + unsigned int new_freq; + + new_freq = cpufreq_driver->get(policy->cpu); + if (!new_freq) + return 0; + + /* + * If fast frequency switching is used with the given policy, the check + * against policy->cur is pointless, so skip it in that case. + */ + if (policy->fast_switch_enabled || !has_target()) + return new_freq; + + if (policy->cur != new_freq) { + cpufreq_out_of_sync(policy, new_freq); + if (update) + schedule_work(&policy->update); + } + + return new_freq; +} + /** * cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur * @cpu: CPU number @@ -1604,31 +1716,10 @@ EXPORT_SYMBOL(cpufreq_quick_get_max); static unsigned int __cpufreq_get(struct cpufreq_policy *policy) { - unsigned int ret_freq = 0; - if (unlikely(policy_is_inactive(policy))) - return ret_freq; - - ret_freq = cpufreq_driver->get(policy->cpu); - - /* - * If fast frequency switching is used with the given policy, the check - * against policy->cur is pointless, so skip it in that case too. - */ - if (policy->fast_switch_enabled) - return ret_freq; - - if (ret_freq && policy->cur && - !(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) { - /* verify no discrepancy between actual and - saved value exists */ - if (unlikely(ret_freq != policy->cur)) { - cpufreq_out_of_sync(policy, ret_freq); - schedule_work(&policy->update); - } - } + return 0; - return ret_freq; + return cpufreq_verify_current_freq(policy, true); } /** @@ -1655,24 +1746,6 @@ unsigned int cpufreq_get(unsigned int cpu) } EXPORT_SYMBOL(cpufreq_get); -static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy) -{ - unsigned int new_freq; - - new_freq = cpufreq_driver->get(policy->cpu); - if (!new_freq) - return 0; - - if (!policy->cur) { - pr_debug("cpufreq: Driver did not initialize current freq\n"); - policy->cur = new_freq; - } else if (policy->cur != new_freq && has_target()) { - cpufreq_out_of_sync(policy, new_freq); - } - - return new_freq; -} - static struct subsys_interface cpufreq_interface = { .name = "cpufreq", .subsys = &cpu_subsys, @@ -2153,8 +2226,8 @@ static int cpufreq_start_governor(struct cpufreq_policy *policy) pr_debug("%s: for CPU %u\n", __func__, policy->cpu); - if (cpufreq_driver->get && !cpufreq_driver->setpolicy) - cpufreq_update_current_freq(policy); + if (cpufreq_driver->get) + cpufreq_verify_current_freq(policy, false); if (policy->governor->start) { ret = policy->governor->start(policy); @@ -2290,6 +2363,7 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, struct cpufreq_policy *new_policy) { struct cpufreq_governor *old_gov; + struct device *cpu_dev = get_cpu_device(policy->cpu); int ret; pr_debug("setting new policy for CPU %u: %u - %u kHz\n", @@ -2298,17 +2372,21 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, memcpy(&new_policy->cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo)); /* - * This check works well when we store new min/max freq attributes, - * because new_policy is a copy of policy with one field updated. - */ - if (new_policy->min > new_policy->max) - return -EINVAL; + * PM QoS framework collects all the requests from users and provide us + * the final aggregated value here. + */ + new_policy->min = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MIN_FREQUENCY); + new_policy->max = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_MAX_FREQUENCY); /* verify the cpu speed can be set within this limit */ ret = cpufreq_driver->verify(new_policy); if (ret) return ret; + /* + * The notifier-chain shall be removed once all the users of + * CPUFREQ_ADJUST are moved to use the QoS framework. + */ /* adjust if necessary - all reasons */ blocking_notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_ADJUST, new_policy); @@ -2387,15 +2465,13 @@ int cpufreq_set_policy(struct cpufreq_policy *policy, * @cpu: CPU to re-evaluate the policy for. * * Update the current frequency for the cpufreq policy of @cpu and use - * cpufreq_set_policy() to re-apply the min and max limits saved in the - * user_policy sub-structure of that policy, which triggers the evaluation - * of policy notifiers and the cpufreq driver's ->verify() callback for the - * policy in question, among other things. + * cpufreq_set_policy() to re-apply the min and max limits, which triggers the + * evaluation of policy notifiers and the cpufreq driver's ->verify() callback + * for the policy in question, among other things. */ void cpufreq_update_policy(unsigned int cpu) { struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu); - struct cpufreq_policy new_policy; if (!policy) return; @@ -2404,16 +2480,11 @@ void cpufreq_update_policy(unsigned int cpu) * BIOS might change freq behind our back * -> ask driver for current freq and notify governors about a change */ - if (cpufreq_driver->get && !cpufreq_driver->setpolicy && - (cpufreq_suspended || WARN_ON(!cpufreq_update_current_freq(policy)))) + if (cpufreq_driver->get && has_target() && + (cpufreq_suspended || WARN_ON(!cpufreq_verify_current_freq(policy, false)))) goto unlock; - pr_debug("updating policy for CPU %u\n", cpu); - memcpy(&new_policy, policy, sizeof(*policy)); - new_policy.min = policy->user_policy.min; - new_policy.max = policy->user_policy.max; - - cpufreq_set_policy(policy, &new_policy); + refresh_frequency_limits(policy); unlock: cpufreq_cpu_release(policy); @@ -2456,10 +2527,9 @@ static int cpufreq_boost_set_sw(int state) break; } - down_write(&policy->rwsem); - policy->user_policy.max = policy->max; - cpufreq_governor_limits(policy); - up_write(&policy->rwsem); + ret = dev_pm_qos_update_request(policy->max_freq_req, policy->max); + if (ret) + break; } return ret; diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 4268f87e99fc..b66e81c06a57 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/cpufreq/cpufreq_conservative.c * @@ -5,10 +6,6 @@ * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. * Jun Nakajima <jun.nakajima@intel.com> * (C) 2009 Alexander Clouter <alex@digriz.org.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/slab.h> diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 9d1d9bf02710..4bb054d0cb43 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/cpufreq/cpufreq_governor.c * @@ -8,10 +9,6 @@ * (C) 2003 Jun Nakajima <jun.nakajima@intel.com> * (C) 2009 Alexander Clouter <alex@digriz.org.uk> * (c) 2012 Viresh Kumar <viresh.kumar@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 8463f5def0f5..c56773c25757 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * drivers/cpufreq/cpufreq_governor.h * @@ -8,10 +9,6 @@ * (C) 2003 Jun Nakajima <jun.nakajima@intel.com> * (C) 2009 Alexander Clouter <alex@digriz.org.uk> * (c) 2012 Viresh Kumar <viresh.kumar@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #ifndef _CPUFREQ_GOVERNOR_H diff --git a/drivers/cpufreq/cpufreq_governor_attr_set.c b/drivers/cpufreq/cpufreq_governor_attr_set.c index 52841f807a7e..66b05a326910 100644 --- a/drivers/cpufreq/cpufreq_governor_attr_set.c +++ b/drivers/cpufreq/cpufreq_governor_attr_set.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Abstract code for CPUFreq governor tunable sysfs attributes. * * Copyright (C) 2016, Intel Corporation * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include "cpufreq_governor.h" diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 6b423eebfd5d..dced033875bf 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/cpufreq/cpufreq_ondemand.c * * Copyright (C) 2001 Russell King * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. * Jun Nakajima <jun.nakajima@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/cpufreq_ondemand.h b/drivers/cpufreq/cpufreq_ondemand.h index 640ea4e97106..1af8e5c4b86f 100644 --- a/drivers/cpufreq/cpufreq_ondemand.h +++ b/drivers/cpufreq/cpufreq_ondemand.h @@ -1,12 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Header file for CPUFreq ondemand governor and related code. * * Copyright (C) 2016, Intel Corporation * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include "cpufreq_governor.h" diff --git a/drivers/cpufreq/cpufreq_performance.c b/drivers/cpufreq/cpufreq_performance.c index dafb679adc58..aaa04dfcacd9 100644 --- a/drivers/cpufreq/cpufreq_performance.c +++ b/drivers/cpufreq/cpufreq_performance.c @@ -1,13 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/cpufreq/cpufreq_performance.c * * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/cpufreq_powersave.c b/drivers/cpufreq/cpufreq_powersave.c index 78a651038faf..c143dc237d87 100644 --- a/drivers/cpufreq/cpufreq_powersave.c +++ b/drivers/cpufreq/cpufreq_powersave.c @@ -1,13 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/cpufreq/cpufreq_powersave.c * * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index 08b192eb22c6..f9bcf0f3ea30 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * drivers/cpufreq/cpufreq_stats.c * * Copyright (C) 2003-2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. * (C) 2004 Zou Nan hai <nanhai.zou@intel.com>. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/cpu.h> diff --git a/drivers/cpufreq/cpufreq_userspace.c b/drivers/cpufreq/cpufreq_userspace.c index bd897e3e134d..cbd81c58cb8f 100644 --- a/drivers/cpufreq/cpufreq_userspace.c +++ b/drivers/cpufreq/cpufreq_userspace.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/cpufreq/cpufreq_userspace.c * * Copyright (C) 2001 Russell King * (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c index 940fe85db97a..297d23cad8b5 100644 --- a/drivers/cpufreq/davinci-cpufreq.c +++ b/drivers/cpufreq/davinci-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * CPU frequency scaling for DaVinci * @@ -13,10 +14,6 @@ * Copyright (C) 2007-2008 Texas Instruments, Inc. * Updated to support OMAP3 * Rajendra Nayak <rnayak@ti.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/types.h> #include <linux/cpufreq.h> @@ -93,7 +90,8 @@ static int davinci_cpu_init(struct cpufreq_policy *policy) * Setting the latency to 2000 us to accommodate addition of drivers * to pre/post change notification list. */ - return cpufreq_generic_init(policy, freq_table, 2000 * 1000); + cpufreq_generic_init(policy, freq_table, 2000 * 1000); + return 0; } static struct cpufreq_driver davinci_driver = { diff --git a/drivers/cpufreq/e_powersaver.c b/drivers/cpufreq/e_powersaver.c index 2d3ef208dd70..45c18c6b8081 100644 --- a/drivers/cpufreq/e_powersaver.c +++ b/drivers/cpufreq/e_powersaver.c @@ -1,8 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Based on documentation provided by Dave Jones. Thanks! * - * Licensed under the terms of the GNU GPL License version 2. - * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* */ diff --git a/drivers/cpufreq/elanfreq.c b/drivers/cpufreq/elanfreq.c index 03419f064752..2242541f7ae3 100644 --- a/drivers/cpufreq/elanfreq.c +++ b/drivers/cpufreq/elanfreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * elanfreq: cpufreq driver for the AMD ELAN family * @@ -7,13 +8,7 @@ * * All Rights Reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * 2002-02-13: - initial revision for 2.4.18-pre9 by Robert Schwebel - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c index e7be0af3199f..ded427e0a488 100644 --- a/drivers/cpufreq/freq_table.c +++ b/drivers/cpufreq/freq_table.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/cpufreq/freq_table.c * * Copyright (C) 2002 - 2003 Dominik Brodowski - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/gx-suspmod.c b/drivers/cpufreq/gx-suspmod.c index 8f52a06664e3..e97b5733aa24 100644 --- a/drivers/cpufreq/gx-suspmod.c +++ b/drivers/cpufreq/gx-suspmod.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Cyrix MediaGX and NatSemi Geode Suspend Modulation * (C) 2002 Zwane Mwaikambo <zwane@commfireservices.com> * (C) 2002 Hiroshi Miura <miura@da-cha.org> * All Rights Reserved * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation - * * The author(s) of this software shall not be held liable for damages * of any nature resulting due to the use of this software. This * software is provided AS-IS with no warranties. @@ -48,7 +45,6 @@ * off_duration = (freq * DURATION) / stock_freq * on_duration = DURATION - off_duration * - * *--------------------------------------------------------------------------- * * ChangeLog: diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c index 1608f7105c9f..5a7f6dafcddb 100644 --- a/drivers/cpufreq/highbank-cpufreq.c +++ b/drivers/cpufreq/highbank-cpufreq.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Calxeda, Inc. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * This driver provides the clk notifier callbacks that are used when * the cpufreq-dt driver changes to frequency to alert the highbank * EnergyCore Management Engine (ECME) about the need to change diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c new file mode 100644 index 000000000000..4f85f3112784 --- /dev/null +++ b/drivers/cpufreq/imx-cpufreq-dt.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP + */ + +#include <linux/cpu.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/nvmem-consumer.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_opp.h> +#include <linux/slab.h> + +#define OCOTP_CFG3_SPEED_GRADE_SHIFT 8 +#define OCOTP_CFG3_SPEED_GRADE_MASK (0x3 << 8) +#define OCOTP_CFG3_MKT_SEGMENT_SHIFT 6 +#define OCOTP_CFG3_MKT_SEGMENT_MASK (0x3 << 6) + +/* cpufreq-dt device registered by imx-cpufreq-dt */ +static struct platform_device *cpufreq_dt_pdev; +static struct opp_table *cpufreq_opp_table; + +static int imx_cpufreq_dt_probe(struct platform_device *pdev) +{ + struct device *cpu_dev = get_cpu_device(0); + u32 cell_value, supported_hw[2]; + int speed_grade, mkt_segment; + int ret; + + ret = nvmem_cell_read_u32(cpu_dev, "speed_grade", &cell_value); + if (ret) + return ret; + + speed_grade = (cell_value & OCOTP_CFG3_SPEED_GRADE_MASK) >> OCOTP_CFG3_SPEED_GRADE_SHIFT; + mkt_segment = (cell_value & OCOTP_CFG3_MKT_SEGMENT_MASK) >> OCOTP_CFG3_MKT_SEGMENT_SHIFT; + + /* + * Early samples without fuses written report "0 0" which means + * consumer segment and minimum speed grading. + * + * According to datasheet minimum speed grading is not supported for + * consumer parts so clamp to 1 to avoid warning for "no OPPs" + * + * Applies to i.MX8M series SoCs. + */ + if (mkt_segment == 0 && speed_grade == 0 && ( + of_machine_is_compatible("fsl,imx8mm") || + of_machine_is_compatible("fsl,imx8mn") || + of_machine_is_compatible("fsl,imx8mq"))) + speed_grade = 1; + + supported_hw[0] = BIT(speed_grade); + supported_hw[1] = BIT(mkt_segment); + dev_info(&pdev->dev, "cpu speed grade %d mkt segment %d supported-hw %#x %#x\n", + speed_grade, mkt_segment, supported_hw[0], supported_hw[1]); + + cpufreq_opp_table = dev_pm_opp_set_supported_hw(cpu_dev, supported_hw, 2); + if (IS_ERR(cpufreq_opp_table)) { + ret = PTR_ERR(cpufreq_opp_table); + dev_err(&pdev->dev, "Failed to set supported opp: %d\n", ret); + return ret; + } + + cpufreq_dt_pdev = platform_device_register_data( + &pdev->dev, "cpufreq-dt", -1, NULL, 0); + if (IS_ERR(cpufreq_dt_pdev)) { + dev_pm_opp_put_supported_hw(cpufreq_opp_table); + ret = PTR_ERR(cpufreq_dt_pdev); + dev_err(&pdev->dev, "Failed to register cpufreq-dt: %d\n", ret); + return ret; + } + + return 0; +} + +static int imx_cpufreq_dt_remove(struct platform_device *pdev) +{ + platform_device_unregister(cpufreq_dt_pdev); + dev_pm_opp_put_supported_hw(cpufreq_opp_table); + + return 0; +} + +static struct platform_driver imx_cpufreq_dt_driver = { + .probe = imx_cpufreq_dt_probe, + .remove = imx_cpufreq_dt_remove, + .driver = { + .name = "imx-cpufreq-dt", + }, +}; +module_platform_driver(imx_cpufreq_dt_driver); + +MODULE_ALIAS("platform:imx-cpufreq-dt"); +MODULE_DESCRIPTION("Freescale i.MX cpufreq speed grading driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index 3e17560b1efe..648a09a1778a 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -1,9 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2013 Freescale Semiconductor, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/clk.h> @@ -193,14 +190,12 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) static int imx6q_cpufreq_init(struct cpufreq_policy *policy) { - int ret; - policy->clk = clks[ARM].clk; - ret = cpufreq_generic_init(policy, freq_table, transition_latency); + cpufreq_generic_init(policy, freq_table, transition_latency); policy->suspend_freq = max_freq; dev_pm_opp_of_register_em(policy->cpus); - return ret; + return 0; } static struct cpufreq_driver imx6q_cpufreq_driver = { diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 34b54df41aaa..cc27d4c59dca 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * intel_pstate.c: Native P state management for Intel processors * * (C) Copyright 2012 Intel Corporation * Author: Dirk Brandewie <dirk.j.brandewie@intel.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 - * of the License. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -902,7 +898,6 @@ static void intel_pstate_update_policies(void) static void intel_pstate_update_max_freq(unsigned int cpu) { struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu); - struct cpufreq_policy new_policy; struct cpudata *cpudata; if (!policy) @@ -912,11 +907,7 @@ static void intel_pstate_update_max_freq(unsigned int cpu) policy->cpuinfo.max_freq = global.turbo_disabled_mf ? cpudata->pstate.max_freq : cpudata->pstate.turbo_freq; - memcpy(&new_policy, policy, sizeof(*policy)); - new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq); - new_policy.min = min(policy->user_policy.min, new_policy.max); - - cpufreq_set_policy(policy, &new_policy); + refresh_frequency_limits(policy); cpufreq_cpu_release(policy); } diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c index 8d63a6dc8383..cb74bdc5baaa 100644 --- a/drivers/cpufreq/kirkwood-cpufreq.c +++ b/drivers/cpufreq/kirkwood-cpufreq.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * kirkwood_freq.c: cpufreq driver for the Marvell kirkwood * * Copyright (C) 2013 Andrew Lunn <andrew@lunn.ch> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/kernel.h> @@ -89,7 +85,8 @@ static int kirkwood_cpufreq_target(struct cpufreq_policy *policy, /* Module init and exit code */ static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, kirkwood_freq_table, 5000); + cpufreq_generic_init(policy, kirkwood_freq_table, 5000); + return 0; } static struct cpufreq_driver kirkwood_cpufreq_driver = { diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c index fb546e0d0356..92d92e67ae0a 100644 --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2001-2004 Dave Jones. * (C) 2002 Padraig Brady. <padraig@antefacto.com> * - * Licensed under the terms of the GNU GPL License version 2. * Based upon datasheets & sample CPUs kindly provided by VIA. * * VIA have currently 3 different versions of Longhaul. diff --git a/drivers/cpufreq/longhaul.h b/drivers/cpufreq/longhaul.h index 1928b923a57b..89c4cc297cb6 100644 --- a/drivers/cpufreq/longhaul.h +++ b/drivers/cpufreq/longhaul.h @@ -1,9 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * longhaul.h * (C) 2003 Dave Jones. * - * Licensed under the terms of the GNU GPL License version 2. - * * VIA-specific information */ diff --git a/drivers/cpufreq/longrun.c b/drivers/cpufreq/longrun.c index 542aa9adba1a..64b8689f7a4a 100644 --- a/drivers/cpufreq/longrun.c +++ b/drivers/cpufreq/longrun.c @@ -1,8 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> * - * Licensed under the terms of the GNU GPL License version 2. - * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* */ diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c index 21c9ce8526c0..0ea88778882a 100644 --- a/drivers/cpufreq/loongson1-cpufreq.c +++ b/drivers/cpufreq/loongson1-cpufreq.c @@ -81,7 +81,7 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev = get_cpu_device(policy->cpu); struct cpufreq_frequency_table *freq_tbl; unsigned int pll_freq, freq; - int steps, i, ret; + int steps, i; pll_freq = clk_get_rate(cpufreq->pll_clk) / 1000; @@ -103,11 +103,9 @@ static int ls1x_cpufreq_init(struct cpufreq_policy *policy) freq_tbl[i].frequency = CPUFREQ_TABLE_END; policy->clk = cpufreq->clk; - ret = cpufreq_generic_init(policy, freq_tbl, 0); - if (ret) - kfree(freq_tbl); + cpufreq_generic_init(policy, freq_tbl, 0); - return ret; + return 0; } static int ls1x_cpufreq_exit(struct cpufreq_policy *policy) diff --git a/drivers/cpufreq/loongson2_cpufreq.c b/drivers/cpufreq/loongson2_cpufreq.c index da344696beed..890813e0bb76 100644 --- a/drivers/cpufreq/loongson2_cpufreq.c +++ b/drivers/cpufreq/loongson2_cpufreq.c @@ -95,7 +95,8 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy) } policy->clk = cpuclk; - return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0); + cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0); + return 0; } static int loongson2_cpufreq_exit(struct cpufreq_policy *policy) diff --git a/drivers/cpufreq/maple-cpufreq.c b/drivers/cpufreq/maple-cpufreq.c index a94355723ef8..28d346062166 100644 --- a/drivers/cpufreq/maple-cpufreq.c +++ b/drivers/cpufreq/maple-cpufreq.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2011 Dmitry Eremin-Solenikov * Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org> * and Markus Demleitner <msdemlei@cl.uni-heidelberg.de> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * This driver adds basic cpufreq support for SMU & 970FX based G5 Macs, * that is iMac G5 and latest single CPU desktop. */ @@ -143,7 +140,8 @@ static unsigned int maple_cpufreq_get_speed(unsigned int cpu) static int maple_cpufreq_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, maple_cpu_freqs, 12000); + cpufreq_generic_init(policy, maple_cpu_freqs, 12000); + return 0; } static struct cpufreq_driver maple_cpufreq_driver = { diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index 48e9829274c6..f14f3a85f2f7 100644 --- a/drivers/cpufreq/mediatek-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2015 Linaro Ltd. * Author: Pi-Cheng Chen <pi-cheng.chen@linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/clk.h> diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c index 68052b74d28f..8d14b42a8c6f 100644 --- a/drivers/cpufreq/omap-cpufreq.c +++ b/drivers/cpufreq/omap-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * CPU frequency scaling for OMAP using OPP information * @@ -8,10 +9,6 @@ * * Copyright (C) 2007-2011 Texas Instruments, Inc. * - OMAP3/4 support by Rajendra Nayak, Santosh Shilimkar - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -125,23 +122,18 @@ static int omap_cpu_init(struct cpufreq_policy *policy) dev_err(mpu_dev, "%s: cpu%d: failed creating freq table[%d]\n", __func__, policy->cpu, result); - goto fail; + clk_put(policy->clk); + return result; } } atomic_inc_return(&freq_table_users); /* FIXME: what's the actual transition time? */ - result = cpufreq_generic_init(policy, freq_table, 300 * 1000); - if (!result) { - dev_pm_opp_of_register_em(policy->cpus); - return 0; - } + cpufreq_generic_init(policy, freq_table, 300 * 1000); + dev_pm_opp_of_register_em(policy->cpus); - freq_table_free(); -fail: - clk_put(policy->clk); - return result; + return 0; } static int omap_cpu_exit(struct cpufreq_policy *policy) diff --git a/drivers/cpufreq/p4-clockmod.c b/drivers/cpufreq/p4-clockmod.c index 911206243050..efc0b46efada 100644 --- a/drivers/cpufreq/p4-clockmod.c +++ b/drivers/cpufreq/p4-clockmod.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Pentium 4/Xeon CPU on demand clock modulation/speed scaling * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> @@ -6,18 +7,12 @@ * (C) 2002 Tora T. Engstad * All Rights Reserved * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * The author(s) of this software shall not be held liable for damages * of any nature resulting due to the use of this software. This * software is provided AS-IS with no warranties. * * Date Errata Description * 20020525 N44, O17 12.5% or 25% DC causes lockup - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c index c7710c149de8..c66f566a854c 100644 --- a/drivers/cpufreq/pasemi-cpufreq.c +++ b/drivers/cpufreq/pasemi-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2007 PA Semi, Inc * @@ -8,21 +9,6 @@ * * Based on arch/powerpc/platforms/cell/cbe_cpufreq.c: * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ #include <linux/cpufreq.h> @@ -145,10 +131,18 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) int err = -ENODEV; cpu = of_get_cpu_node(policy->cpu, NULL); + if (!cpu) + goto out; + max_freqp = of_get_property(cpu, "clock-frequency", NULL); of_node_put(cpu); - if (!cpu) + if (!max_freqp) { + err = -EINVAL; goto out; + } + + /* we need the freq in kHz */ + max_freq = *max_freqp / 1000; dn = of_find_compatible_node(NULL, NULL, "1682m-sdc"); if (!dn) @@ -185,16 +179,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) } pr_debug("init cpufreq on CPU %d\n", policy->cpu); - - max_freqp = of_get_property(cpu, "clock-frequency", NULL); - if (!max_freqp) { - err = -EINVAL; - goto out_unmap_sdcpwr; - } - - /* we need the freq in kHz */ - max_freq = *max_freqp / 1000; - pr_debug("max clock-frequency is at %u kHz\n", max_freq); pr_debug("initializing frequency table\n"); @@ -210,10 +194,8 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->cur = pas_freqs[cur_astate].frequency; ppc_proc_freq = policy->cur * 1000ul; - return cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency()); - -out_unmap_sdcpwr: - iounmap(sdcpwr_mapbase); + cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency()); + return 0; out_unmap_sdcasr: iounmap(sdcasr_mapbase); diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index 1e5e64643c3a..fdc767fdbe6a 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -582,10 +582,10 @@ static int __init pcc_cpufreq_init(void) /* Skip initialization if another cpufreq driver is there. */ if (cpufreq_get_current_driver()) - return 0; + return -EEXIST; if (acpi_disabled) - return 0; + return -ENODEV; ret = pcc_cpufreq_probe(); if (ret) { diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c index 9b4ce2eb8222..73621bc11976 100644 --- a/drivers/cpufreq/pmac32-cpufreq.c +++ b/drivers/cpufreq/pmac32-cpufreq.c @@ -1,16 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org> * Copyright (C) 2004 John Steele Scott <toojays@toojays.net> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * TODO: Need a big cleanup here. Basically, we need to have different * cpufreq_driver structures for the different type of HW instead of the * current mess. We also need to better deal with the detection of the * type of machine. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -376,7 +372,8 @@ static int pmac_cpufreq_target( struct cpufreq_policy *policy, static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, pmac_cpu_freqs, transition_latency); + cpufreq_generic_init(policy, pmac_cpu_freqs, transition_latency); + return 0; } static u32 read_gpio(struct device_node *np) diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 1d32a863332d..d7542a106e6b 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org> * and Markus Demleitner <msdemlei@cl.uni-heidelberg.de> * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * This driver adds basic cpufreq support for SMU & 970FX based G5 Macs, * that is iMac G5 and latest single CPU desktop. */ @@ -324,7 +321,8 @@ static unsigned int g5_cpufreq_get_speed(unsigned int cpu) static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, g5_cpu_freqs, transition_latency); + cpufreq_generic_init(policy, g5_cpu_freqs, transition_latency); + return 0; } static struct cpufreq_driver g5_cpufreq_driver = { diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c index 8a8ea68611a8..0196f8129597 100644 --- a/drivers/cpufreq/powernow-k6.c +++ b/drivers/cpufreq/powernow-k6.c @@ -1,10 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * This file was based upon code in Powertweak Linux (http://powertweak.sf.net) * (C) 2000-2003 Dave Jones, Arjan van de Ven, Janne Pänkälä, * Dominik Brodowski. * - * Licensed under the terms of the GNU GPL License version 2. - * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* */ diff --git a/drivers/cpufreq/powernow-k7.c b/drivers/cpufreq/powernow-k7.c index d6cb052b0a75..5e5171d3eece 100644 --- a/drivers/cpufreq/powernow-k7.c +++ b/drivers/cpufreq/powernow-k7.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * AMD K7 Powernow driver. * (C) 2003 Dave Jones on behalf of SuSE Labs. * - * Licensed under the terms of the GNU GPL License version 2. * Based upon datasheets & sample CPUs kindly provided by AMD. * * Errata 5: diff --git a/drivers/cpufreq/powernow-k7.h b/drivers/cpufreq/powernow-k7.h index 35fb4eaf6e1c..4bc673faeef7 100644 --- a/drivers/cpufreq/powernow-k7.h +++ b/drivers/cpufreq/powernow-k7.h @@ -1,10 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * (C) 2003 Dave Jones. * - * Licensed under the terms of the GNU GPL License version 2. - * * AMD-specific information - * */ union msr_fidvidctl { diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 3c12e03fa343..2db2f1739e09 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -1,8 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (c) 2003-2012 Advanced Micro Devices, Inc. - * Your use of this code is subject to the terms and conditions of the - * GNU general public license version 2. See "COPYING" or - * http://www.gnu.org/licenses/gpl.html * * Maintainer: * Andreas Herrmann <herrmann.der.user@googlemail.com> @@ -11,7 +9,6 @@ * (C) 2003 Dave Jones on behalf of SuSE Labs * (C) 2004 Dominik Brodowski <linux@brodo.de> * (C) 2004 Pavel Machek <pavel@ucw.cz> - * Licensed under the terms of the GNU GPL License version 2. * Based upon datasheets & sample CPUs kindly provided by AMD. * * Valuable input gratefully received from Dave Jones, Pavel Machek, diff --git a/drivers/cpufreq/powernow-k8.h b/drivers/cpufreq/powernow-k8.h index 45ce11e86626..83331ceb6bc3 100644 --- a/drivers/cpufreq/powernow-k8.h +++ b/drivers/cpufreq/powernow-k8.h @@ -1,8 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * (c) 2003-2006 Advanced Micro Devices, Inc. - * Your use of this code is subject to the terms and conditions of the - * GNU general public license version 2. See "COPYING" or - * http://www.gnu.org/licenses/gpl.html */ struct powernow_k8_data { diff --git a/drivers/cpufreq/ppc_cbe_cpufreq.c b/drivers/cpufreq/ppc_cbe_cpufreq.c index 8414c3a4ea08..b83f36febf03 100644 --- a/drivers/cpufreq/ppc_cbe_cpufreq.c +++ b/drivers/cpufreq/ppc_cbe_cpufreq.c @@ -1,23 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * cpufreq driver for the cell processor * * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007 * * Author: Christian Krafft <krafft@de.ibm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/cpufreq.h> diff --git a/drivers/cpufreq/ppc_cbe_cpufreq_pervasive.c b/drivers/cpufreq/ppc_cbe_cpufreq_pervasive.c index 84d2f2cf5ba7..04830cd95333 100644 --- a/drivers/cpufreq/ppc_cbe_cpufreq_pervasive.c +++ b/drivers/cpufreq/ppc_cbe_cpufreq_pervasive.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pervasive backend for the cbe_cpufreq driver * @@ -7,20 +8,6 @@ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007 * * Author: Christian Krafft <krafft@de.ibm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/io.h> diff --git a/drivers/cpufreq/ppc_cbe_cpufreq_pmi.c b/drivers/cpufreq/ppc_cbe_cpufreq_pmi.c index eeaa92251512..97c8ee4614b7 100644 --- a/drivers/cpufreq/ppc_cbe_cpufreq_pmi.c +++ b/drivers/cpufreq/ppc_cbe_cpufreq_pmi.c @@ -1,23 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pmi backend for the cbe_cpufreq driver * * (C) Copyright IBM Deutschland Entwicklung GmbH 2005-2007 * * Author: Christian Krafft <krafft@de.ibm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/kernel.h> diff --git a/drivers/cpufreq/pxa2xx-cpufreq.c b/drivers/cpufreq/pxa2xx-cpufreq.c index 74e0e0c20c46..f0b6f52eb2c3 100644 --- a/drivers/cpufreq/pxa2xx-cpufreq.c +++ b/drivers/cpufreq/pxa2xx-cpufreq.c @@ -1,20 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2002,2003 Intrinsyc Software * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * * History: * 31-Jul-2002 : Initial version [FB] * 29-Jan-2003 : added PXA255 support [FB] @@ -26,7 +13,6 @@ * memory connected to CS0, you will need to register a platform specific * notifier which will adjust the memory access strobes to maintain a * minimum strobe width. - * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/pxa3xx-cpufreq.c b/drivers/cpufreq/pxa3xx-cpufreq.c index 9daa2cc318bb..32f993c94675 100644 --- a/drivers/cpufreq/pxa3xx-cpufreq.c +++ b/drivers/cpufreq/pxa3xx-cpufreq.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2008 Marvell International Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/kernel.h> diff --git a/drivers/cpufreq/qoriq-cpufreq.c b/drivers/cpufreq/qoriq-cpufreq.c index 71b640c8c1a5..8e436dc75c8b 100644 --- a/drivers/cpufreq/qoriq-cpufreq.c +++ b/drivers/cpufreq/qoriq-cpufreq.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2013 Freescale Semiconductor, Inc. * * CPU Frequency Scaling driver for Freescale QorIQ SoCs. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/raspberrypi-cpufreq.c b/drivers/cpufreq/raspberrypi-cpufreq.c new file mode 100644 index 000000000000..2bc7d9734272 --- /dev/null +++ b/drivers/cpufreq/raspberrypi-cpufreq.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Raspberry Pi cpufreq driver + * + * Copyright (C) 2019, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> + */ + +#include <linux/clk.h> +#include <linux/cpu.h> +#include <linux/cpufreq.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_opp.h> + +#define RASPBERRYPI_FREQ_INTERVAL 100000000 + +static struct platform_device *cpufreq_dt; + +static int raspberrypi_cpufreq_probe(struct platform_device *pdev) +{ + struct device *cpu_dev; + unsigned long min, max; + unsigned long rate; + struct clk *clk; + int ret; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) { + pr_err("Cannot get CPU for cpufreq driver\n"); + return -ENODEV; + } + + clk = clk_get(cpu_dev, NULL); + if (IS_ERR(clk)) { + dev_err(cpu_dev, "Cannot get clock for CPU0\n"); + return PTR_ERR(clk); + } + + /* + * The max and min frequencies are configurable in the Raspberry Pi + * firmware, so we query them at runtime. + */ + min = roundup(clk_round_rate(clk, 0), RASPBERRYPI_FREQ_INTERVAL); + max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL); + clk_put(clk); + + for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) { + ret = dev_pm_opp_add(cpu_dev, rate, 0); + if (ret) + goto remove_opp; + } + + cpufreq_dt = platform_device_register_simple("cpufreq-dt", -1, NULL, 0); + ret = PTR_ERR_OR_ZERO(cpufreq_dt); + if (ret) { + dev_err(cpu_dev, "Failed to create platform device, %d\n", ret); + goto remove_opp; + } + + return 0; + +remove_opp: + dev_pm_opp_remove_all_dynamic(cpu_dev); + + return ret; +} + +static int raspberrypi_cpufreq_remove(struct platform_device *pdev) +{ + struct device *cpu_dev; + + cpu_dev = get_cpu_device(0); + if (cpu_dev) + dev_pm_opp_remove_all_dynamic(cpu_dev); + + platform_device_unregister(cpufreq_dt); + + return 0; +} + +/* + * Since the driver depends on clk-raspberrypi, which may return EPROBE_DEFER, + * all the activity is performed in the probe, which may be defered as well. + */ +static struct platform_driver raspberrypi_cpufreq_driver = { + .driver = { + .name = "raspberrypi-cpufreq", + }, + .probe = raspberrypi_cpufreq_probe, + .remove = raspberrypi_cpufreq_remove, +}; +module_platform_driver(raspberrypi_cpufreq_driver); + +MODULE_AUTHOR("Nicolas Saenz Julienne <nsaenzjulienne@suse.de"); +MODULE_DESCRIPTION("Raspberry Pi cpufreq driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:raspberrypi-cpufreq"); diff --git a/drivers/cpufreq/s3c2410-cpufreq.c b/drivers/cpufreq/s3c2410-cpufreq.c index b8e5da8e188b..0c4f2ccd7e22 100644 --- a/drivers/cpufreq/s3c2410-cpufreq.c +++ b/drivers/cpufreq/s3c2410-cpufreq.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2006-2008 Simtec Electronics * http://armlinux.simtec.co.uk/ * Ben Dooks <ben@simtec.co.uk> * * S3C2410 CPU Frequency scaling - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/init.h> diff --git a/drivers/cpufreq/s3c2412-cpufreq.c b/drivers/cpufreq/s3c2412-cpufreq.c index b04b6f02bbdc..53385a9ab957 100644 --- a/drivers/cpufreq/s3c2412-cpufreq.c +++ b/drivers/cpufreq/s3c2412-cpufreq.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2008 Simtec Electronics * http://armlinux.simtec.co.uk/ * Ben Dooks <ben@simtec.co.uk> * * S3C2412 CPU Frequency scalling - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/s3c2416-cpufreq.c b/drivers/cpufreq/s3c2416-cpufreq.c index 5b2db3c6568f..106910351c41 100644 --- a/drivers/cpufreq/s3c2416-cpufreq.c +++ b/drivers/cpufreq/s3c2416-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * S3C2416/2450 CPUfreq Support * @@ -6,10 +7,6 @@ * based on s3c64xx_cpufreq.c * * Copyright 2009 Wolfson Microelectronics plc - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/kernel.h> @@ -450,21 +447,16 @@ static int s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy) /* Datasheet says PLL stabalisation time must be at least 300us, * so but add some fudge. (reference in LOCKCON0 register description) */ - ret = cpufreq_generic_init(policy, s3c_freq->freq_table, + cpufreq_generic_init(policy, s3c_freq->freq_table, (500 * 1000) + s3c_freq->regulator_latency); - if (ret) - goto err_freq_table; - register_reboot_notifier(&s3c2416_cpufreq_reboot_notifier); return 0; -err_freq_table: #ifdef CONFIG_ARM_S3C2416_CPUFREQ_VCORESCALE - regulator_put(s3c_freq->vddarm); err_vddarm: -#endif clk_put(s3c_freq->armclk); +#endif err_armclk: clk_put(s3c_freq->hclk); err_hclk: diff --git a/drivers/cpufreq/s3c2440-cpufreq.c b/drivers/cpufreq/s3c2440-cpufreq.c index d2f67b7a20dd..3f772ba8896e 100644 --- a/drivers/cpufreq/s3c2440-cpufreq.c +++ b/drivers/cpufreq/s3c2440-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2006-2009 Simtec Electronics * http://armlinux.simtec.co.uk/ @@ -5,10 +6,6 @@ * Vincent Sanders <vince@simtec.co.uk> * * S3C2440/S3C2442 CPU Frequency scaling - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/s3c24xx-cpufreq-debugfs.c b/drivers/cpufreq/s3c24xx-cpufreq-debugfs.c index 0df87b6480fe..290e3539d03e 100644 --- a/drivers/cpufreq/s3c24xx-cpufreq-debugfs.c +++ b/drivers/cpufreq/s3c24xx-cpufreq-debugfs.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2009 Simtec Electronics * http://armlinux.simtec.co.uk/ * Ben Dooks <ben@simtec.co.uk> * * S3C24XX CPU Frequency scaling - debugfs status support - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c index 3b291a2b0cb3..ed0e713b1b57 100644 --- a/drivers/cpufreq/s3c24xx-cpufreq.c +++ b/drivers/cpufreq/s3c24xx-cpufreq.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2006-2008 Simtec Electronics * http://armlinux.simtec.co.uk/ * Ben Dooks <ben@simtec.co.uk> * * S3C24XX CPU Frequency scaling - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/s3c64xx-cpufreq.c b/drivers/cpufreq/s3c64xx-cpufreq.c index 0cb9040eca49..af0c00dabb22 100644 --- a/drivers/cpufreq/s3c64xx-cpufreq.c +++ b/drivers/cpufreq/s3c64xx-cpufreq.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2009 Wolfson Microelectronics plc * * S3C64xx CPUfreq Support - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) "cpufreq: " fmt @@ -147,7 +144,6 @@ out: static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy) { - int ret; struct cpufreq_frequency_table *freq; if (policy->cpu != 0) @@ -168,8 +164,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy) #ifdef CONFIG_REGULATOR vddarm = regulator_get(NULL, "vddarm"); if (IS_ERR(vddarm)) { - ret = PTR_ERR(vddarm); - pr_err("Failed to obtain VDDARM: %d\n", ret); + pr_err("Failed to obtain VDDARM: %ld\n", PTR_ERR(vddarm)); pr_err("Only frequency scaling available\n"); vddarm = NULL; } else { @@ -199,16 +194,9 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy) * the PLLs, which we don't currently) is ~300us worst case, * but add some fudge. */ - ret = cpufreq_generic_init(policy, s3c64xx_freq_table, + cpufreq_generic_init(policy, s3c64xx_freq_table, (500 * 1000) + regulator_latency); - if (ret != 0) { - pr_err("Failed to configure frequency table: %d\n", - ret); - regulator_put(vddarm); - clk_put(policy->clk); - } - - return ret; + return 0; } static struct cpufreq_driver s3c64xx_cpufreq_driver = { diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 5b4289460bc9..5d10030f2560 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2010 Samsung Electronics Co., Ltd. * http://www.samsung.com * * CPU frequency scaling for S5PC110/S5PV210 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -481,7 +478,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index) arm_volt, arm_volt_max); } - printk(KERN_DEBUG "Perf changed[L%d]\n", index); + pr_debug("Perf changed[L%d]\n", index); exit: mutex_unlock(&set_freq_lock); @@ -544,7 +541,8 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) s5pv210_dram_conf[1].freq = clk_get_rate(dmc1_clk); policy->suspend_freq = SLEEP_FREQ; - return cpufreq_generic_init(policy, s5pv210_freq_table, 40000); + cpufreq_generic_init(policy, s5pv210_freq_table, 40000); + return 0; out_dmc1: clk_put(dmc0_clk); diff --git a/drivers/cpufreq/sa1100-cpufreq.c b/drivers/cpufreq/sa1100-cpufreq.c index e2d8a77c36d5..5c075ef6adc0 100644 --- a/drivers/cpufreq/sa1100-cpufreq.c +++ b/drivers/cpufreq/sa1100-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * cpu-sa1100.c: clock scaling for the SA1100 * @@ -26,22 +27,6 @@ * 2600 GA Delft * The Netherlands * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * * Theory of operations * ==================== * @@ -80,7 +65,6 @@ * sa1100_update_dram_timings(), you'll have to read sections 8.2, * 9.5.7.3, and 10.2 from the "Intel StrongARM SA-1100 Microprocessor * Developers Manual" (available for free from Intel). - * */ #include <linux/kernel.h> @@ -197,7 +181,8 @@ static int sa1100_target(struct cpufreq_policy *policy, unsigned int ppcr) static int __init sa1100_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, sa11x0_freq_table, 0); + cpufreq_generic_init(policy, sa11x0_freq_table, 0); + return 0; } static struct cpufreq_driver sa1100_driver __refdata = { diff --git a/drivers/cpufreq/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c index 66e5fb088ecc..d9d04d935b3a 100644 --- a/drivers/cpufreq/sa1110-cpufreq.c +++ b/drivers/cpufreq/sa1110-cpufreq.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/arch/arm/mach-sa1100/cpu-sa1110.c * * Copyright (C) 2001 Russell King * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * Note: there are two erratas that apply to the SA1110 here: * 7 - SDRAM auto-power-up failure (rev A0) * 13 - Corruption of internal register reads/writes following @@ -306,7 +303,8 @@ static int sa1110_target(struct cpufreq_policy *policy, unsigned int ppcr) static int __init sa1110_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, sa11x0_freq_table, 0); + cpufreq_generic_init(policy, sa11x0_freq_table, 0); + return 0; } /* sa1110_driver needs __refdata because it must remain after init registers diff --git a/drivers/cpufreq/sc520_freq.c b/drivers/cpufreq/sc520_freq.c index abaa75e86148..c6f647babaad 100644 --- a/drivers/cpufreq/sc520_freq.c +++ b/drivers/cpufreq/sc520_freq.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * sc520_freq.c: cpufreq driver for the AMD Elan sc520 * * Copyright (C) 2005 Sean Young <sean@mess.org> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Based on elanfreq.c * * 2005-03-30: - initial revision diff --git a/drivers/cpufreq/sfi-cpufreq.c b/drivers/cpufreq/sfi-cpufreq.c index 978770432b13..45cfdf67cf03 100644 --- a/drivers/cpufreq/sfi-cpufreq.c +++ b/drivers/cpufreq/sfi-cpufreq.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * SFI Performance States Driver * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * * Author: Vishwesh M Rudramuni <vishwesh.m.rudramuni@intel.com> * Author: Srinidhi Kasagar <srinidhi.kasagar@intel.com> */ diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c index 4074e2615522..73bd8dc47074 100644 --- a/drivers/cpufreq/spear-cpufreq.c +++ b/drivers/cpufreq/spear-cpufreq.c @@ -153,8 +153,9 @@ static int spear_cpufreq_target(struct cpufreq_policy *policy, static int spear_cpufreq_init(struct cpufreq_policy *policy) { policy->clk = spear_cpufreq.clk; - return cpufreq_generic_init(policy, spear_cpufreq.freq_tbl, + cpufreq_generic_init(policy, spear_cpufreq.freq_tbl, spear_cpufreq.transition_latency); + return 0; } static struct cpufreq_driver spear_cpufreq_driver = { diff --git a/drivers/cpufreq/speedstep-ich.c b/drivers/cpufreq/speedstep-ich.c index 5d8a09b82efb..547fd7af5bf5 100644 --- a/drivers/cpufreq/speedstep-ich.c +++ b/drivers/cpufreq/speedstep-ich.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2001 Dave Jones, Arjan van de ven. * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> * - * Licensed under the terms of the GNU GPL License version 2. * Based upon reverse engineered information, and on Intel documentation * for chipsets ICH2-M and ICH3-M. * diff --git a/drivers/cpufreq/speedstep-lib.c b/drivers/cpufreq/speedstep-lib.c index cabb6f48eb77..5c4f8f07c5a6 100644 --- a/drivers/cpufreq/speedstep-lib.c +++ b/drivers/cpufreq/speedstep-lib.c @@ -1,8 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> * - * Licensed under the terms of the GNU GPL License version 2. - * * Library for common functions for Intel SpeedStep v.1 and v.2 support * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* diff --git a/drivers/cpufreq/speedstep-lib.h b/drivers/cpufreq/speedstep-lib.h index 70d9cea1219d..dc762ea786be 100644 --- a/drivers/cpufreq/speedstep-lib.h +++ b/drivers/cpufreq/speedstep-lib.h @@ -1,8 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> * - * Licensed under the terms of the GNU GPL License version 2. - * * Library for common functions for Intel SpeedStep v.1 and v.2 support * * BIG FAT DISCLAIMER: Work in progress code. Possibly *dangerous* diff --git a/drivers/cpufreq/speedstep-smi.c b/drivers/cpufreq/speedstep-smi.c index 01fe70dae20b..eeb31bc21cc9 100644 --- a/drivers/cpufreq/speedstep-smi.c +++ b/drivers/cpufreq/speedstep-smi.c @@ -1,10 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Intel SpeedStep SMI driver. * * (C) 2003 Hiroshi Miura <miura@da-cha.org> - * - * Licensed under the terms of the GNU GPL License version 2. - * */ diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c index 47105735df12..8f16bbb164b8 100644 --- a/drivers/cpufreq/sti-cpufreq.c +++ b/drivers/cpufreq/sti-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Match running platform with pre-defined OPP values for CPUFreq * @@ -5,10 +6,6 @@ * Lee Jones <lee.jones@linaro.org> * * Copyright (C) 2015 STMicroelectronics (R&D) Limited - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the version 2 of the GNU General Public License as - * published by the Free Software Foundation */ #include <linux/cpu.h> diff --git a/drivers/cpufreq/tegra124-cpufreq.c b/drivers/cpufreq/tegra124-cpufreq.c index 5e748c8a5c9a..4f0c637b3b49 100644 --- a/drivers/cpufreq/tegra124-cpufreq.c +++ b/drivers/cpufreq/tegra124-cpufreq.c @@ -1,14 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Tegra 124 cpufreq driver - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c index f1e09022b819..bcecb068b51b 100644 --- a/drivers/cpufreq/tegra186-cpufreq.c +++ b/drivers/cpufreq/tegra186-cpufreq.c @@ -1,14 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. */ #include <linux/cpufreq.h> diff --git a/drivers/cpufreq/tegra20-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c index 05f57dcd5215..f84ecd22f488 100644 --- a/drivers/cpufreq/tegra20-cpufreq.c +++ b/drivers/cpufreq/tegra20-cpufreq.c @@ -1,19 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010 Google, Inc. * * Author: * Colin Cross <ccross@google.com> * Based on arch/arm/plat-omap/cpu-omap.c, (C) 2005 Nokia Corporation - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/clk.h> @@ -127,17 +118,11 @@ static int tegra_target(struct cpufreq_policy *policy, unsigned int index) static int tegra_cpu_init(struct cpufreq_policy *policy) { struct tegra20_cpufreq *cpufreq = cpufreq_get_driver_data(); - int ret; clk_prepare_enable(cpufreq->cpu_clk); /* FIXME: what's the actual transition time? */ - ret = cpufreq_generic_init(policy, freq_table, 300 * 1000); - if (ret) { - clk_disable_unprepare(cpufreq->cpu_clk); - return ret; - } - + cpufreq_generic_init(policy, freq_table, 300 * 1000); policy->clk = cpufreq->cpu_clk; policy->suspend_freq = freq_table[0].frequency; return 0; diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c index 22b53bf26817..2ad1ae17932d 100644 --- a/drivers/cpufreq/ti-cpufreq.c +++ b/drivers/cpufreq/ti-cpufreq.c @@ -1,17 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * TI CPUFreq/OPP hw-supported driver * * Copyright (C) 2016-2017 Texas Instruments, Inc. * Dave Gerlach <d-gerlach@ti.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/cpu.h> diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c index db62d9844751..707dbc1b7ac8 100644 --- a/drivers/cpufreq/unicore2-cpufreq.c +++ b/drivers/cpufreq/unicore2-cpufreq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * clock scaling for the UniCore-II * @@ -5,10 +6,6 @@ * * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> * Copyright (C) 2001-2010 Guan Xuetao - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/err.h> |