diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/cpufreq/cppc_cpufreq.c | 53 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt-platdev.c | 13 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt.c | 6 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt.h | 19 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 93 | ||||
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 8 | ||||
| -rw-r--r-- | drivers/cpufreq/kirkwood-cpufreq.c | 8 | ||||
| -rw-r--r-- | drivers/cpufreq/scpi-cpufreq.c | 1 | ||||
| -rw-r--r-- | drivers/cpufreq/sti-cpufreq.c | 2 |
10 files changed, 122 insertions, 83 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 4dc95250cf4e..d8b164a7c4e5 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -222,7 +222,7 @@ config CPUFREQ_DT help This adds a generic DT based cpufreq driver for frequency management. It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) - systems which share clock and voltage across all CPUs. + systems. If in doubt, say N. diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 8882b8e2ecd0..99db4227ae38 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -19,10 +19,19 @@ #include <linux/delay.h> #include <linux/cpu.h> #include <linux/cpufreq.h> +#include <linux/dmi.h> #include <linux/vmalloc.h> +#include <asm/unaligned.h> + #include <acpi/cppc_acpi.h> +/* Minimum struct length needed for the DMI processor entry we want */ +#define DMI_ENTRY_PROCESSOR_MIN_LENGTH 48 + +/* Offest in the DMI processor structure for the max frequency */ +#define DMI_PROCESSOR_MAX_SPEED 0x14 + /* * These structs contain information parsed from per CPU * ACPI _CPC structures. @@ -32,6 +41,39 @@ */ static struct cpudata **all_cpu_data; +/* Capture the max KHz from DMI */ +static u64 cppc_dmi_max_khz; + +/* Callback function used to retrieve the max frequency from DMI */ +static void cppc_find_dmi_mhz(const struct dmi_header *dm, void *private) +{ + const u8 *dmi_data = (const u8 *)dm; + u16 *mhz = (u16 *)private; + + if (dm->type == DMI_ENTRY_PROCESSOR && + dm->length >= DMI_ENTRY_PROCESSOR_MIN_LENGTH) { + u16 val = (u16)get_unaligned((const u16 *) + (dmi_data + DMI_PROCESSOR_MAX_SPEED)); + *mhz = val > *mhz ? val : *mhz; + } +} + +/* Look up the max frequency in DMI */ +static u64 cppc_get_dmi_max_khz(void) +{ + u16 mhz = 0; + + dmi_walk(cppc_find_dmi_mhz, &mhz); + + /* + * Real stupid fallback value, just in case there is no + * actual value set. + */ + mhz = mhz ? mhz : 1; + + return (1000 * mhz); +} + static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation) @@ -42,7 +84,7 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, cpu = all_cpu_data[policy->cpu]; - cpu->perf_ctrls.desired_perf = target_freq; + cpu->perf_ctrls.desired_perf = (u64)target_freq * policy->max / cppc_dmi_max_khz; freqs.old = policy->cur; freqs.new = target_freq; @@ -94,8 +136,10 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) return ret; } - policy->min = cpu->perf_caps.lowest_perf; - policy->max = cpu->perf_caps.highest_perf; + cppc_dmi_max_khz = cppc_get_dmi_max_khz(); + + policy->min = cpu->perf_caps.lowest_perf * cppc_dmi_max_khz / cpu->perf_caps.highest_perf; + policy->max = cppc_dmi_max_khz; policy->cpuinfo.min_freq = policy->min; policy->cpuinfo.max_freq = policy->max; policy->shared_type = cpu->shared_type; @@ -112,7 +156,8 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) cpu->cur_policy = policy; /* Set policy->cur to max now. The governors will adjust later. */ - policy->cur = cpu->perf_ctrls.desired_perf = cpu->perf_caps.highest_perf; + policy->cur = cppc_dmi_max_khz; + cpu->perf_ctrls.desired_perf = cpu->perf_caps.highest_perf; ret = cppc_set_perf(cpu_num, &cpu->perf_ctrls); if (ret) diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 0bb44d5b5df4..71267626456b 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -11,6 +11,8 @@ #include <linux/of.h> #include <linux/platform_device.h> +#include "cpufreq-dt.h" + static const struct of_device_id machines[] __initconst = { { .compatible = "allwinner,sun4i-a10", }, { .compatible = "allwinner,sun5i-a10s", }, @@ -40,6 +42,7 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "samsung,exynos5250", }, #ifndef CONFIG_BL_SWITCHER { .compatible = "samsung,exynos5420", }, + { .compatible = "samsung,exynos5433", }, { .compatible = "samsung,exynos5800", }, #endif @@ -51,6 +54,7 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "renesas,r8a7779", }, { .compatible = "renesas,r8a7790", }, { .compatible = "renesas,r8a7791", }, + { .compatible = "renesas,r8a7792", }, { .compatible = "renesas,r8a7793", }, { .compatible = "renesas,r8a7794", }, { .compatible = "renesas,sh73a0", }, @@ -68,12 +72,16 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "sigma,tango4" }, + { .compatible = "ti,am33xx", }, + { .compatible = "ti,dra7", }, { .compatible = "ti,omap2", }, { .compatible = "ti,omap3", }, { .compatible = "ti,omap4", }, { .compatible = "ti,omap5", }, { .compatible = "xlnx,zynq-7000", }, + + { } }; static int __init cpufreq_dt_platdev_init(void) @@ -89,7 +97,8 @@ static int __init cpufreq_dt_platdev_init(void) if (!match) return -ENODEV; - return PTR_ERR_OR_ZERO(platform_device_register_simple("cpufreq-dt", -1, - NULL, 0)); + return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt", + -1, match->data, + sizeof(struct cpufreq_dt_platform_data))); } device_initcall(cpufreq_dt_platdev_init); diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 3957de801ae8..5c07ae05d69a 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -25,6 +25,8 @@ #include <linux/slab.h> #include <linux/thermal.h> +#include "cpufreq-dt.h" + struct private_data { struct device *cpu_dev; struct thermal_cooling_device *cdev; @@ -353,6 +355,7 @@ static struct cpufreq_driver dt_cpufreq_driver = { static int dt_cpufreq_probe(struct platform_device *pdev) { + struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev); int ret; /* @@ -366,7 +369,8 @@ static int dt_cpufreq_probe(struct platform_device *pdev) if (ret) return ret; - dt_cpufreq_driver.driver_data = dev_get_platdata(&pdev->dev); + if (data && data->have_governor_per_policy) + dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY; ret = cpufreq_register_driver(&dt_cpufreq_driver); if (ret) diff --git a/drivers/cpufreq/cpufreq-dt.h b/drivers/cpufreq/cpufreq-dt.h new file mode 100644 index 000000000000..54d774e46c43 --- /dev/null +++ b/drivers/cpufreq/cpufreq-dt.h @@ -0,0 +1,19 @@ +/* + * 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__ +#define __CPUFREQ_DT_H__ + +#include <linux/types.h> + +struct cpufreq_dt_platform_data { + bool have_governor_per_policy; +}; + +#endif /* __CPUFREQ_DT_H__ */ diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3dd4884c6f9e..3a64136bf21b 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -916,58 +916,18 @@ static struct kobj_type ktype_cpufreq = { .release = cpufreq_sysfs_release, }; -static int add_cpu_dev_symlink(struct cpufreq_policy *policy, int cpu) +static int add_cpu_dev_symlink(struct cpufreq_policy *policy, + struct device *dev) { - struct device *cpu_dev; - - pr_debug("%s: Adding symlink for CPU: %u\n", __func__, cpu); - - if (!policy) - return 0; - - cpu_dev = get_cpu_device(cpu); - if (WARN_ON(!cpu_dev)) - return 0; - - return sysfs_create_link(&cpu_dev->kobj, &policy->kobj, "cpufreq"); -} - -static void remove_cpu_dev_symlink(struct cpufreq_policy *policy, int cpu) -{ - struct device *cpu_dev; - - pr_debug("%s: Removing symlink for CPU: %u\n", __func__, cpu); - - cpu_dev = get_cpu_device(cpu); - if (WARN_ON(!cpu_dev)) - return; - - sysfs_remove_link(&cpu_dev->kobj, "cpufreq"); + dev_dbg(dev, "%s: Adding symlink\n", __func__); + return sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq"); } -/* Add/remove symlinks for all related CPUs */ -static int cpufreq_add_dev_symlink(struct cpufreq_policy *policy) +static void remove_cpu_dev_symlink(struct cpufreq_policy *policy, + struct device *dev) { - unsigned int j; - int ret = 0; - - /* Some related CPUs might not be present (physically hotplugged) */ - for_each_cpu(j, policy->real_cpus) { - ret = add_cpu_dev_symlink(policy, j); - if (ret) - break; - } - - return ret; -} - -static void cpufreq_remove_dev_symlink(struct cpufreq_policy *policy) -{ - unsigned int j; - - /* Some related CPUs might not be present (physically hotplugged) */ - for_each_cpu(j, policy->real_cpus) - remove_cpu_dev_symlink(policy, j); + dev_dbg(dev, "%s: Removing symlink\n", __func__); + sysfs_remove_link(&dev->kobj, "cpufreq"); } static int cpufreq_add_dev_interface(struct cpufreq_policy *policy) @@ -999,7 +959,7 @@ static int cpufreq_add_dev_interface(struct cpufreq_policy *policy) return ret; } - return cpufreq_add_dev_symlink(policy); + return 0; } __weak struct cpufreq_governor *cpufreq_default_governor(void) @@ -1073,13 +1033,9 @@ static void handle_update(struct work_struct *work) static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu) { - struct device *dev = get_cpu_device(cpu); struct cpufreq_policy *policy; int ret; - if (WARN_ON(!dev)) - return NULL; - policy = kzalloc(sizeof(*policy), GFP_KERNEL); if (!policy) return NULL; @@ -1133,7 +1089,6 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy, bool notify) down_write(&policy->rwsem); cpufreq_stats_free_table(policy); - cpufreq_remove_dev_symlink(policy); kobj = &policy->kobj; cmp = &policy->kobj_unregister; up_write(&policy->rwsem); @@ -1215,8 +1170,8 @@ static int cpufreq_online(unsigned int cpu) if (new_policy) { /* related_cpus should at least include policy->cpus. */ cpumask_copy(policy->related_cpus, policy->cpus); - /* Remember CPUs present at the policy creation time. */ - cpumask_and(policy->real_cpus, policy->cpus, cpu_present_mask); + /* Clear mask of registered CPUs */ + cpumask_clear(policy->real_cpus); } /* @@ -1331,6 +1286,8 @@ out_free_policy: return ret; } +static void cpufreq_offline(unsigned int cpu); + /** * cpufreq_add_dev - the cpufreq interface for a CPU device. * @dev: CPU device. @@ -1340,22 +1297,28 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif) { struct cpufreq_policy *policy; unsigned cpu = dev->id; + int ret; dev_dbg(dev, "%s: adding CPU%u\n", __func__, cpu); - if (cpu_online(cpu)) - return cpufreq_online(cpu); + if (cpu_online(cpu)) { + ret = cpufreq_online(cpu); + if (ret) + return ret; + } - /* - * A hotplug notifier will follow and we will handle it as CPU online - * then. For now, just create the sysfs link, unless there is no policy - * or the link is already present. - */ + /* Create sysfs link on CPU registration */ policy = per_cpu(cpufreq_cpu_data, cpu); if (!policy || cpumask_test_and_set_cpu(cpu, policy->real_cpus)) return 0; - return add_cpu_dev_symlink(policy, cpu); + ret = add_cpu_dev_symlink(policy, dev); + if (ret) { + cpumask_clear_cpu(cpu, policy->real_cpus); + cpufreq_offline(cpu); + } + + return ret; } static void cpufreq_offline(unsigned int cpu) @@ -1436,7 +1399,7 @@ static void cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif) cpufreq_offline(cpu); cpumask_clear_cpu(cpu, policy->real_cpus); - remove_cpu_dev_symlink(policy, cpu); + remove_cpu_dev_symlink(policy, dev); if (cpumask_empty(policy->real_cpus)) cpufreq_policy_free(policy, true); diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 86c29af7eb77..806f2039571e 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1035,7 +1035,7 @@ static struct cpu_defaults core_params = { }, }; -static struct cpu_defaults silvermont_params = { +static const struct cpu_defaults silvermont_params = { .pid_policy = { .sample_rate_ms = 10, .deadband = 0, @@ -1057,7 +1057,7 @@ static struct cpu_defaults silvermont_params = { }, }; -static struct cpu_defaults airmont_params = { +static const struct cpu_defaults airmont_params = { .pid_policy = { .sample_rate_ms = 10, .deadband = 0, @@ -1079,7 +1079,7 @@ static struct cpu_defaults airmont_params = { }, }; -static struct cpu_defaults knl_params = { +static const struct cpu_defaults knl_params = { .pid_policy = { .sample_rate_ms = 10, .deadband = 0, @@ -1099,7 +1099,7 @@ static struct cpu_defaults knl_params = { }, }; -static struct cpu_defaults bxt_params = { +static const struct cpu_defaults bxt_params = { .pid_policy = { .sample_rate_ms = 10, .deadband = 0, diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c index be42f103db60..1b9bcd76c60e 100644 --- a/drivers/cpufreq/kirkwood-cpufreq.c +++ b/drivers/cpufreq/kirkwood-cpufreq.c @@ -123,7 +123,7 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) priv.cpu_clk = of_clk_get_by_name(np, "cpu_clk"); if (IS_ERR(priv.cpu_clk)) { - dev_err(priv.dev, "Unable to get cpuclk"); + dev_err(priv.dev, "Unable to get cpuclk\n"); return PTR_ERR(priv.cpu_clk); } @@ -132,7 +132,7 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) priv.ddr_clk = of_clk_get_by_name(np, "ddrclk"); if (IS_ERR(priv.ddr_clk)) { - dev_err(priv.dev, "Unable to get ddrclk"); + dev_err(priv.dev, "Unable to get ddrclk\n"); err = PTR_ERR(priv.ddr_clk); goto out_cpu; } @@ -142,7 +142,7 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) priv.powersave_clk = of_clk_get_by_name(np, "powersave"); if (IS_ERR(priv.powersave_clk)) { - dev_err(priv.dev, "Unable to get powersave"); + dev_err(priv.dev, "Unable to get powersave\n"); err = PTR_ERR(priv.powersave_clk); goto out_ddr; } @@ -155,7 +155,7 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) if (!err) return 0; - dev_err(priv.dev, "Failed to register cpufreq driver"); + dev_err(priv.dev, "Failed to register cpufreq driver\n"); clk_disable_unprepare(priv.powersave_clk); out_ddr: diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c index e8a7bf57b31b..ea7a4e1b68c2 100644 --- a/drivers/cpufreq/scpi-cpufreq.c +++ b/drivers/cpufreq/scpi-cpufreq.c @@ -105,7 +105,6 @@ static int scpi_cpufreq_remove(struct platform_device *pdev) static struct platform_driver scpi_cpufreq_platdrv = { .driver = { .name = "scpi-cpufreq", - .owner = THIS_MODULE, }, .probe = scpi_cpufreq_probe, .remove = scpi_cpufreq_remove, diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c index 04042038ec4b..b366e6d830ea 100644 --- a/drivers/cpufreq/sti-cpufreq.c +++ b/drivers/cpufreq/sti-cpufreq.c @@ -163,7 +163,7 @@ static int sti_cpufreq_set_opp_info(void) reg_fields = sti_cpufreq_match(); if (!reg_fields) { - dev_err(dev, "This SoC doesn't support voltage scaling"); + dev_err(dev, "This SoC doesn't support voltage scaling\n"); return -ENODEV; } |