diff options
Diffstat (limited to 'drivers/cpufreq')
33 files changed, 246 insertions, 562 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 2011fec2d6ad..bdce4488ded1 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -71,15 +71,6 @@ config ARM_HIGHBANK_CPUFREQ If in doubt, say N. -config ARM_DB8500_CPUFREQ - tristate "ST-Ericsson DB8500 cpufreq" if COMPILE_TEST && !ARCH_U8500 - default ARCH_U8500 - depends on HAS_IOMEM - depends on !CPU_THERMAL || THERMAL - help - This adds the CPUFreq driver for ST-Ericsson Ux500 (DB8500) SoC - series. - config ARM_IMX6Q_CPUFREQ tristate "Freescale i.MX6 cpufreq support" depends on ARCH_MXC @@ -96,14 +87,13 @@ config ARM_KIRKWOOD_CPUFREQ This adds the CPUFreq driver for Marvell Kirkwood SoCs. -config ARM_MT8173_CPUFREQ - tristate "Mediatek MT8173 CPUFreq support" +config ARM_MEDIATEK_CPUFREQ + tristate "CPU Frequency scaling support for MediaTek SoCs" depends on ARCH_MEDIATEK && REGULATOR - depends on ARM64 || (ARM_CPU_TOPOLOGY && COMPILE_TEST) depends on !CPU_THERMAL || THERMAL select PM_OPP help - This adds the CPUFreq driver support for Mediatek MT8173 SoC. + This adds the CPUFreq driver support for MediaTek SoCs. config ARM_OMAP2PLUS_CPUFREQ bool "TI OMAP2+" @@ -242,6 +232,11 @@ config ARM_STI_CPUFREQ this config option if you wish to add CPUFreq support for STi based SoCs. +config ARM_TANGO_CPUFREQ + bool + depends on CPUFREQ_DT && ARCH_TANGO + default y + config ARM_TEGRA20_CPUFREQ bool "Tegra20 CPUFreq support" depends on ARCH_TEGRA diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index ab3a42cd29ef..c7af9b2a255e 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -53,12 +53,11 @@ obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o obj-$(CONFIG_ARCH_DAVINCI) += davinci-cpufreq.o -obj-$(CONFIG_ARM_DB8500_CPUFREQ) += dbx500-cpufreq.o obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o -obj-$(CONFIG_ARM_MT8173_CPUFREQ) += mt8173-cpufreq.o +obj-$(CONFIG_ARM_MEDIATEK_CPUFREQ) += mediatek-cpufreq.o obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o @@ -75,6 +74,7 @@ obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o obj-$(CONFIG_ARM_SCPI_CPUFREQ) += scpi-cpufreq.o obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o obj-$(CONFIG_ARM_STI_CPUFREQ) += sti-cpufreq.o +obj-$(CONFIG_ARM_TANGO_CPUFREQ) += tango-cpufreq.o obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o obj-$(CONFIG_ARM_TEGRA124_CPUFREQ) += tegra124-cpufreq.o obj-$(CONFIG_ARM_TEGRA186_CPUFREQ) += tegra186-cpufreq.o diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c index ea6d62547b10..17504129fd77 100644 --- a/drivers/cpufreq/arm_big_little.c +++ b/drivers/cpufreq/arm_big_little.c @@ -483,11 +483,8 @@ static int bL_cpufreq_init(struct cpufreq_policy *policy) return ret; } - if (arm_bL_ops->get_transition_latency) - policy->cpuinfo.transition_latency = - arm_bL_ops->get_transition_latency(cpu_dev); - else - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; + policy->cpuinfo.transition_latency = + arm_bL_ops->get_transition_latency(cpu_dev); if (is_bL_switching_enabled()) per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu); @@ -622,7 +619,8 @@ int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops) return -EBUSY; } - if (!ops || !strlen(ops->name) || !ops->init_opp_table) { + if (!ops || !strlen(ops->name) || !ops->init_opp_table || + !ops->get_transition_latency) { pr_err("%s: Invalid arm_bL_ops, exiting\n", __func__); return -ENODEV; } diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 10be285c9055..a1c3025f9df7 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -172,7 +172,6 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) return -EFAULT; } - cpumask_set_cpu(policy->cpu, policy->cpus); cpu->cur_policy = policy; /* Set policy->cur to max now. The governors will adjust later. */ diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 1c262923fe58..a020da7940d6 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -9,11 +9,16 @@ #include <linux/err.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include "cpufreq-dt.h" -static const struct of_device_id machines[] __initconst = { +/* + * Machines for which the cpufreq device is *always* created, mostly used for + * platforms using "operating-points" (V1) property. + */ +static const struct of_device_id whitelist[] __initconst = { { .compatible = "allwinner,sun4i-a10", }, { .compatible = "allwinner,sun5i-a10s", }, { .compatible = "allwinner,sun5i-a13", }, @@ -22,7 +27,6 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "allwinner,sun6i-a31s", }, { .compatible = "allwinner,sun7i-a20", }, { .compatible = "allwinner,sun8i-a23", }, - { .compatible = "allwinner,sun8i-a33", }, { .compatible = "allwinner,sun8i-a83t", }, { .compatible = "allwinner,sun8i-h3", }, @@ -32,7 +36,6 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "arm,integrator-cp", }, { .compatible = "hisilicon,hi3660", }, - { .compatible = "hisilicon,hi6220", }, { .compatible = "fsl,imx27", }, { .compatible = "fsl,imx51", }, @@ -46,11 +49,8 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "samsung,exynos3250", }, { .compatible = "samsung,exynos4210", }, { .compatible = "samsung,exynos4212", }, - { .compatible = "samsung,exynos4412", }, { .compatible = "samsung,exynos5250", }, #ifndef CONFIG_BL_SWITCHER - { .compatible = "samsung,exynos5420", }, - { .compatible = "samsung,exynos5433", }, { .compatible = "samsung,exynos5800", }, #endif @@ -67,6 +67,8 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "renesas,r8a7792", }, { .compatible = "renesas,r8a7793", }, { .compatible = "renesas,r8a7794", }, + { .compatible = "renesas,r8a7795", }, + { .compatible = "renesas,r8a7796", }, { .compatible = "renesas,sh73a0", }, { .compatible = "rockchip,rk2928", }, @@ -76,17 +78,17 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "rockchip,rk3188", }, { .compatible = "rockchip,rk3228", }, { .compatible = "rockchip,rk3288", }, + { .compatible = "rockchip,rk3328", }, { .compatible = "rockchip,rk3366", }, { .compatible = "rockchip,rk3368", }, { .compatible = "rockchip,rk3399", }, - { .compatible = "sigma,tango4" }, - - { .compatible = "socionext,uniphier-pro5", }, - { .compatible = "socionext,uniphier-pxs2", }, { .compatible = "socionext,uniphier-ld6b", }, - { .compatible = "socionext,uniphier-ld11", }, - { .compatible = "socionext,uniphier-ld20", }, + + { .compatible = "st-ericsson,u8500", }, + { .compatible = "st-ericsson,u8540", }, + { .compatible = "st-ericsson,u9500", }, + { .compatible = "st-ericsson,u9540", }, { .compatible = "ti,omap2", }, { .compatible = "ti,omap3", }, @@ -94,27 +96,56 @@ static const struct of_device_id machines[] __initconst = { { .compatible = "ti,omap5", }, { .compatible = "xlnx,zynq-7000", }, + { .compatible = "xlnx,zynqmp", }, - { .compatible = "zte,zx296718", }, + { } +}; +/* + * Machines for which the cpufreq device is *not* created, mostly used for + * platforms using "operating-points-v2" property. + */ +static const struct of_device_id blacklist[] __initconst = { { } }; +static bool __init cpu0_node_has_opp_v2_prop(void) +{ + struct device_node *np = of_cpu_device_node_get(0); + bool ret = false; + + if (of_get_property(np, "operating-points-v2", NULL)) + ret = true; + + of_node_put(np); + return ret; +} + static int __init cpufreq_dt_platdev_init(void) { struct device_node *np = of_find_node_by_path("/"); const struct of_device_id *match; + const void *data = NULL; if (!np) return -ENODEV; - match = of_match_node(machines, np); + match = of_match_node(whitelist, np); + if (match) { + data = match->data; + goto create_pdev; + } + + if (cpu0_node_has_opp_v2_prop() && !of_match_node(blacklist, np)) + goto create_pdev; + of_node_put(np); - if (!match) - return -ENODEV; + return -ENODEV; +create_pdev: + of_node_put(np); return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt", - -1, match->data, + -1, 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 fef3c2160691..d83ab94d041a 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -274,6 +274,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) transition_latency = CPUFREQ_ETERNAL; policy->cpuinfo.transition_latency = transition_latency; + policy->dvfs_possible_from_any_cpu = true; return 0; diff --git a/drivers/cpufreq/cpufreq-nforce2.c b/drivers/cpufreq/cpufreq-nforce2.c index 5503d491b016..dbf82f36d270 100644 --- a/drivers/cpufreq/cpufreq-nforce2.c +++ b/drivers/cpufreq/cpufreq-nforce2.c @@ -357,7 +357,6 @@ static int nforce2_cpu_init(struct cpufreq_policy *policy) /* cpuinfo and default policy values */ policy->min = policy->cpuinfo.min_freq = min_fsb * fid * 100; policy->max = policy->cpuinfo.max_freq = max_fsb * fid * 100; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; return 0; } @@ -369,6 +368,7 @@ static int nforce2_cpu_exit(struct cpufreq_policy *policy) static struct cpufreq_driver nforce2_driver = { .name = "nforce2", + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = nforce2_verify, .target = nforce2_target, .get = nforce2_get, diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 9bf97a366029..ea43b147a7fe 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -524,6 +524,32 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, } EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq); +unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy) +{ + unsigned int latency; + + if (policy->transition_delay_us) + return policy->transition_delay_us; + + latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC; + if (latency) { + /* + * For platforms that can change the frequency very fast (< 10 + * us), the above formula gives a decent transition delay. But + * for platforms where transition_latency is in milliseconds, it + * ends up giving unrealistic values. + * + * Cap the default transition delay to 10 ms, which seems to be + * a reasonable amount of time after which we should reevaluate + * the frequency. + */ + return min(latency * LATENCY_MULTIPLIER, (unsigned int)10000); + } + + return LATENCY_MULTIPLIER; +} +EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us); + /********************************************************************* * SYSFS INTERFACE * *********************************************************************/ @@ -1817,9 +1843,10 @@ EXPORT_SYMBOL(cpufreq_unregister_notifier); * twice in parallel for the same policy and that it will never be called in * parallel with either ->target() or ->target_index() for the same policy. * - * If CPUFREQ_ENTRY_INVALID is returned by the driver's ->fast_switch() - * callback to indicate an error condition, the hardware configuration must be - * preserved. + * Returns the actual frequency set for the CPU. + * + * If 0 is returned by the driver's ->fast_switch() callback to indicate an + * error condition, the hardware configuration must be preserved. */ unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, unsigned int target_freq) @@ -1988,13 +2015,13 @@ static int cpufreq_init_governor(struct cpufreq_policy *policy) if (!policy->governor) return -EINVAL; - if (policy->governor->max_transition_latency && - policy->cpuinfo.transition_latency > - policy->governor->max_transition_latency) { + /* Platform doesn't want dynamic frequency switching ? */ + if (policy->governor->dynamic_switching && + cpufreq_driver->flags & CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING) { struct cpufreq_governor *gov = cpufreq_fallback_governor(); if (gov) { - pr_warn("%s governor failed, too long transition latency of HW, fallback to %s governor\n", + pr_warn("Can't use %s governor as dynamic switching is disallowed. Fallback to %s governor\n", policy->governor->name, gov->name); policy->governor = gov; } else { diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 88220ff3e1c2..f20f20a77d4d 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -246,7 +246,6 @@ gov_show_one_common(sampling_rate); gov_show_one_common(sampling_down_factor); gov_show_one_common(up_threshold); gov_show_one_common(ignore_nice_load); -gov_show_one_common(min_sampling_rate); gov_show_one(cs, down_threshold); gov_show_one(cs, freq_step); @@ -254,12 +253,10 @@ gov_attr_rw(sampling_rate); gov_attr_rw(sampling_down_factor); gov_attr_rw(up_threshold); gov_attr_rw(ignore_nice_load); -gov_attr_ro(min_sampling_rate); gov_attr_rw(down_threshold); gov_attr_rw(freq_step); static struct attribute *cs_attributes[] = { - &min_sampling_rate.attr, &sampling_rate.attr, &sampling_down_factor.attr, &up_threshold.attr, @@ -297,10 +294,7 @@ static int cs_init(struct dbs_data *dbs_data) dbs_data->up_threshold = DEF_FREQUENCY_UP_THRESHOLD; dbs_data->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR; dbs_data->ignore_nice_load = 0; - dbs_data->tuners = tuners; - dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO * - jiffies_to_usecs(10); return 0; } diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 47e24b5384b3..58d4f4e1ad6a 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -47,14 +47,11 @@ ssize_t store_sampling_rate(struct gov_attr_set *attr_set, const char *buf, { struct dbs_data *dbs_data = to_dbs_data(attr_set); struct policy_dbs_info *policy_dbs; - unsigned int rate; int ret; - ret = sscanf(buf, "%u", &rate); + ret = sscanf(buf, "%u", &dbs_data->sampling_rate); if (ret != 1) return -EINVAL; - dbs_data->sampling_rate = max(rate, dbs_data->min_sampling_rate); - /* * We are operating under dbs_data->mutex and so the list and its * entries can't be freed concurrently. @@ -275,6 +272,9 @@ static void dbs_update_util_handler(struct update_util_data *data, u64 time, struct policy_dbs_info *policy_dbs = cdbs->policy_dbs; u64 delta_ns, lst; + if (!cpufreq_can_do_remote_dvfs(policy_dbs->policy)) + return; + /* * The work may not be allowed to be queued up right now. * Possible reasons: @@ -392,7 +392,6 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy) struct dbs_governor *gov = dbs_governor_of(policy); struct dbs_data *dbs_data; struct policy_dbs_info *policy_dbs; - unsigned int latency; int ret = 0; /* State should be equivalent to EXIT */ @@ -431,16 +430,7 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy) if (ret) goto free_policy_dbs_info; - /* policy latency is in ns. Convert it to us first */ - latency = policy->cpuinfo.transition_latency / 1000; - if (latency == 0) - latency = 1; - - /* Bring kernel and HW constraints together */ - dbs_data->min_sampling_rate = max(dbs_data->min_sampling_rate, - MIN_LATENCY_MULTIPLIER * latency); - dbs_data->sampling_rate = max(dbs_data->min_sampling_rate, - LATENCY_MULTIPLIER * latency); + dbs_data->sampling_rate = cpufreq_policy_transition_delay_us(policy); if (!have_governor_per_policy()) gov->gdbs_data = dbs_data; diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 0236ec2cd654..8463f5def0f5 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -41,7 +41,6 @@ enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE}; struct dbs_data { struct gov_attr_set attr_set; void *tuners; - unsigned int min_sampling_rate; unsigned int ignore_nice_load; unsigned int sampling_rate; unsigned int sampling_down_factor; @@ -160,7 +159,7 @@ void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy); #define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \ { \ .name = _name_, \ - .max_transition_latency = TRANSITION_LATENCY_LIMIT, \ + .dynamic_switching = true, \ .owner = THIS_MODULE, \ .init = cpufreq_dbs_governor_init, \ .exit = cpufreq_dbs_governor_exit, \ diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 3937acf7e026..6b423eebfd5d 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -319,7 +319,6 @@ gov_show_one_common(sampling_rate); gov_show_one_common(up_threshold); gov_show_one_common(sampling_down_factor); gov_show_one_common(ignore_nice_load); -gov_show_one_common(min_sampling_rate); gov_show_one_common(io_is_busy); gov_show_one(od, powersave_bias); @@ -329,10 +328,8 @@ gov_attr_rw(up_threshold); gov_attr_rw(sampling_down_factor); gov_attr_rw(ignore_nice_load); gov_attr_rw(powersave_bias); -gov_attr_ro(min_sampling_rate); static struct attribute *od_attributes[] = { - &min_sampling_rate.attr, &sampling_rate.attr, &up_threshold.attr, &sampling_down_factor.attr, @@ -373,17 +370,8 @@ static int od_init(struct dbs_data *dbs_data) if (idle_time != -1ULL) { /* Idle micro accounting is supported. Use finer thresholds */ dbs_data->up_threshold = MICRO_FREQUENCY_UP_THRESHOLD; - /* - * In nohz/micro accounting case we set the minimum frequency - * not depending on HZ, but fixed (very low). - */ - dbs_data->min_sampling_rate = MICRO_FREQUENCY_MIN_SAMPLE_RATE; } else { dbs_data->up_threshold = DEF_FREQUENCY_UP_THRESHOLD; - - /* For correct statistics, we need 10 ticks for each measure */ - dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO * - jiffies_to_usecs(10); } dbs_data->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR; diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c deleted file mode 100644 index 4ee0431579c1..000000000000 --- a/drivers/cpufreq/dbx500-cpufreq.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Copyright (C) STMicroelectronics 2009 - * Copyright (C) ST-Ericsson SA 2010-2012 - * - * License Terms: GNU General Public License v2 - * Author: Sundar Iyer <sundar.iyer@stericsson.com> - * Author: Martin Persson <martin.persson@stericsson.com> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/cpufreq.h> -#include <linux/cpu_cooling.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/clk.h> - -static struct cpufreq_frequency_table *freq_table; -static struct clk *armss_clk; -static struct thermal_cooling_device *cdev; - -static int dbx500_cpufreq_target(struct cpufreq_policy *policy, - unsigned int index) -{ - /* update armss clk frequency */ - return clk_set_rate(armss_clk, freq_table[index].frequency * 1000); -} - -static int dbx500_cpufreq_init(struct cpufreq_policy *policy) -{ - policy->clk = armss_clk; - return cpufreq_generic_init(policy, freq_table, 20 * 1000); -} - -static int dbx500_cpufreq_exit(struct cpufreq_policy *policy) -{ - if (!IS_ERR(cdev)) - cpufreq_cooling_unregister(cdev); - return 0; -} - -static void dbx500_cpufreq_ready(struct cpufreq_policy *policy) -{ - cdev = cpufreq_cooling_register(policy); - if (IS_ERR(cdev)) - pr_err("Failed to register cooling device %ld\n", PTR_ERR(cdev)); - else - pr_info("Cooling device registered: %s\n", cdev->type); -} - -static struct cpufreq_driver dbx500_cpufreq_driver = { - .flags = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS | - CPUFREQ_NEED_INITIAL_FREQ_CHECK, - .verify = cpufreq_generic_frequency_table_verify, - .target_index = dbx500_cpufreq_target, - .get = cpufreq_generic_get, - .init = dbx500_cpufreq_init, - .exit = dbx500_cpufreq_exit, - .ready = dbx500_cpufreq_ready, - .name = "DBX500", - .attr = cpufreq_generic_attr, -}; - -static int dbx500_cpufreq_probe(struct platform_device *pdev) -{ - struct cpufreq_frequency_table *pos; - - freq_table = dev_get_platdata(&pdev->dev); - if (!freq_table) { - pr_err("dbx500-cpufreq: Failed to fetch cpufreq table\n"); - return -ENODEV; - } - - armss_clk = clk_get(&pdev->dev, "armss"); - if (IS_ERR(armss_clk)) { - pr_err("dbx500-cpufreq: Failed to get armss clk\n"); - return PTR_ERR(armss_clk); - } - - pr_info("dbx500-cpufreq: Available frequencies:\n"); - cpufreq_for_each_entry(pos, freq_table) - pr_info(" %d Mhz\n", pos->frequency / 1000); - - return cpufreq_register_driver(&dbx500_cpufreq_driver); -} - -static struct platform_driver dbx500_cpufreq_plat_driver = { - .driver = { - .name = "cpufreq-ux500", - }, - .probe = dbx500_cpufreq_probe, -}; - -static int __init dbx500_cpufreq_register(void) -{ - return platform_driver_register(&dbx500_cpufreq_plat_driver); -} -device_initcall(dbx500_cpufreq_register); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("cpufreq driver for DBX500"); diff --git a/drivers/cpufreq/elanfreq.c b/drivers/cpufreq/elanfreq.c index bfce11cba1df..45e2ca62515e 100644 --- a/drivers/cpufreq/elanfreq.c +++ b/drivers/cpufreq/elanfreq.c @@ -165,9 +165,6 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy) if (pos->frequency > max_freq) pos->frequency = CPUFREQ_ENTRY_INVALID; - /* cpuinfo and default policy values */ - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; - return cpufreq_table_validate_and_show(policy, elanfreq_table); } @@ -196,6 +193,7 @@ __setup("elanfreq=", elanfreq_setup); static struct cpufreq_driver elanfreq_driver = { .get = elanfreq_get_cpu_frequency, + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = elanfreq_target, .init = elanfreq_cpu_init, diff --git a/drivers/cpufreq/gx-suspmod.c b/drivers/cpufreq/gx-suspmod.c index 3488c9c175eb..8f52a06664e3 100644 --- a/drivers/cpufreq/gx-suspmod.c +++ b/drivers/cpufreq/gx-suspmod.c @@ -428,7 +428,6 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy) policy->max = maxfreq; policy->cpuinfo.min_freq = maxfreq / max_duration; policy->cpuinfo.max_freq = maxfreq; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; return 0; } @@ -438,6 +437,7 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy) * MediaGX/Geode GX initialize cpufreq driver */ static struct cpufreq_driver gx_suspmod_driver = { + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .get = gx_get_cpuspeed, .verify = cpufreq_gx_verify, .target = cpufreq_gx_target, diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index b6edd3ccaa55..14466a9b01c0 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -47,6 +47,7 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) struct dev_pm_opp *opp; unsigned long freq_hz, volt, volt_old; unsigned int old_freq, new_freq; + bool pll1_sys_temp_enabled = false; int ret; new_freq = freq_table[index].frequency; @@ -124,6 +125,10 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) if (freq_hz > clk_get_rate(pll2_pfd2_396m_clk)) { clk_set_rate(pll1_sys_clk, new_freq * 1000); clk_set_parent(pll1_sw_clk, pll1_sys_clk); + } else { + /* pll1_sys needs to be enabled for divider rate change to work. */ + pll1_sys_temp_enabled = true; + clk_prepare_enable(pll1_sys_clk); } } @@ -135,6 +140,10 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) return ret; } + /* PLL1 is only needed until after ARM-PODF is set. */ + if (pll1_sys_temp_enabled) + clk_disable_unprepare(pll1_sys_clk); + /* scaling down? scale voltage after frequency */ if (new_freq < old_freq) { ret = regulator_set_voltage_tol(arm_reg, volt, 0); diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 65ee4fcace1f..93a0e88bef76 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -37,8 +37,7 @@ #include <asm/cpufeature.h> #include <asm/intel-family.h> -#define INTEL_PSTATE_DEFAULT_SAMPLING_INTERVAL (10 * NSEC_PER_MSEC) -#define INTEL_PSTATE_HWP_SAMPLING_INTERVAL (50 * NSEC_PER_MSEC) +#define INTEL_PSTATE_SAMPLING_INTERVAL (10 * NSEC_PER_MSEC) #define INTEL_CPUFREQ_TRANSITION_LATENCY 20000 #define INTEL_CPUFREQ_TRANSITION_DELAY 500 @@ -173,28 +172,6 @@ struct vid_data { }; /** - * struct _pid - Stores PID data - * @setpoint: Target set point for busyness or performance - * @integral: Storage for accumulated error values - * @p_gain: PID proportional gain - * @i_gain: PID integral gain - * @d_gain: PID derivative gain - * @deadband: PID deadband - * @last_err: Last error storage for integral part of PID calculation - * - * Stores PID coefficients and last error for PID controller. - */ -struct _pid { - int setpoint; - int32_t integral; - int32_t p_gain; - int32_t i_gain; - int32_t d_gain; - int deadband; - int32_t last_err; -}; - -/** * struct global_params - Global parameters, mostly tunable via sysfs. * @no_turbo: Whether or not to use turbo P-states. * @turbo_disabled: Whethet or not turbo P-states are available at all, @@ -223,7 +200,6 @@ struct global_params { * @last_update: Time of the last update. * @pstate: Stores P state limits for this CPU * @vid: Stores VID limits for this CPU - * @pid: Stores PID parameters for this CPU * @last_sample_time: Last Sample time * @aperf_mperf_shift: Number of clock cycles after aperf, merf is incremented * This shift is a multiplier to mperf delta to @@ -258,7 +234,6 @@ struct cpudata { struct pstate_data pstate; struct vid_data vid; - struct _pid pid; u64 last_update; u64 last_sample_time; @@ -284,28 +259,6 @@ struct cpudata { static struct cpudata **all_cpu_data; /** - * struct pstate_adjust_policy - Stores static PID configuration data - * @sample_rate_ms: PID calculation sample rate in ms - * @sample_rate_ns: Sample rate calculation in ns - * @deadband: PID deadband - * @setpoint: PID Setpoint - * @p_gain_pct: PID proportional gain - * @i_gain_pct: PID integral gain - * @d_gain_pct: PID derivative gain - * - * Stores per CPU model static PID configuration data. - */ -struct pstate_adjust_policy { - int sample_rate_ms; - s64 sample_rate_ns; - int deadband; - int setpoint; - int p_gain_pct; - int d_gain_pct; - int i_gain_pct; -}; - -/** * struct pstate_funcs - Per CPU model specific callbacks * @get_max: Callback to get maximum non turbo effective P state * @get_max_physical: Callback to get maximum non turbo physical P state @@ -314,7 +267,6 @@ struct pstate_adjust_policy { * @get_scaling: Callback to get frequency scaling factor * @get_val: Callback to convert P state to actual MSR write value * @get_vid: Callback to get VID data for Atom platforms - * @update_util: Active mode utilization update callback. * * Core and Atom CPU models have different way to get P State limits. This * structure is used to store those callbacks. @@ -328,20 +280,9 @@ struct pstate_funcs { int (*get_aperf_mperf_shift)(void); u64 (*get_val)(struct cpudata*, int pstate); void (*get_vid)(struct cpudata *); - void (*update_util)(struct update_util_data *data, u64 time, - unsigned int flags); }; static struct pstate_funcs pstate_funcs __read_mostly; -static struct pstate_adjust_policy pid_params __read_mostly = { - .sample_rate_ms = 10, - .sample_rate_ns = 10 * NSEC_PER_MSEC, - .deadband = 0, - .setpoint = 97, - .p_gain_pct = 20, - .d_gain_pct = 0, - .i_gain_pct = 0, -}; static int hwp_active __read_mostly; static bool per_cpu_limits __read_mostly; @@ -509,56 +450,6 @@ static inline void intel_pstate_exit_perf_limits(struct cpufreq_policy *policy) } #endif -static signed int pid_calc(struct _pid *pid, int32_t busy) -{ - signed int result; - int32_t pterm, dterm, fp_error; - int32_t integral_limit; - - fp_error = pid->setpoint - busy; - - if (abs(fp_error) <= pid->deadband) - return 0; - - pterm = mul_fp(pid->p_gain, fp_error); - - pid->integral += fp_error; - - /* - * We limit the integral here so that it will never - * get higher than 30. This prevents it from becoming - * too large an input over long periods of time and allows - * it to get factored out sooner. - * - * The value of 30 was chosen through experimentation. - */ - integral_limit = int_tofp(30); - if (pid->integral > integral_limit) - pid->integral = integral_limit; - if (pid->integral < -integral_limit) - pid->integral = -integral_limit; - - dterm = mul_fp(pid->d_gain, fp_error - pid->last_err); - pid->last_err = fp_error; - - result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm; - result = result + (1 << (FRAC_BITS-1)); - return (signed int)fp_toint(result); -} - -static inline void intel_pstate_pid_reset(struct cpudata *cpu) -{ - struct _pid *pid = &cpu->pid; - - pid->p_gain = percent_fp(pid_params.p_gain_pct); - pid->d_gain = percent_fp(pid_params.d_gain_pct); - pid->i_gain = percent_fp(pid_params.i_gain_pct); - pid->setpoint = int_tofp(pid_params.setpoint); - pid->last_err = pid->setpoint - int_tofp(100); - pid->deadband = int_tofp(pid_params.deadband); - pid->integral = 0; -} - static inline void update_turbo_state(void) { u64 misc_en; @@ -911,82 +802,6 @@ static void intel_pstate_update_policies(void) cpufreq_update_policy(cpu); } -/************************** debugfs begin ************************/ -static int pid_param_set(void *data, u64 val) -{ - unsigned int cpu; - - *(u32 *)data = val; - pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC; - for_each_possible_cpu(cpu) - if (all_cpu_data[cpu]) - intel_pstate_pid_reset(all_cpu_data[cpu]); - - return 0; -} - -static int pid_param_get(void *data, u64 *val) -{ - *val = *(u32 *)data; - return 0; -} -DEFINE_SIMPLE_ATTRIBUTE(fops_pid_param, pid_param_get, pid_param_set, "%llu\n"); - -static struct dentry *debugfs_parent; - -struct pid_param { - char *name; - void *value; - struct dentry *dentry; -}; - -static struct pid_param pid_files[] = { - {"sample_rate_ms", &pid_params.sample_rate_ms, }, - {"d_gain_pct", &pid_params.d_gain_pct, }, - {"i_gain_pct", &pid_params.i_gain_pct, }, - {"deadband", &pid_params.deadband, }, - {"setpoint", &pid_params.setpoint, }, - {"p_gain_pct", &pid_params.p_gain_pct, }, - {NULL, NULL, } -}; - -static void intel_pstate_debug_expose_params(void) -{ - int i; - - debugfs_parent = debugfs_create_dir("pstate_snb", NULL); - if (IS_ERR_OR_NULL(debugfs_parent)) - return; - - for (i = 0; pid_files[i].name; i++) { - struct dentry *dentry; - - dentry = debugfs_create_file(pid_files[i].name, 0660, - debugfs_parent, pid_files[i].value, - &fops_pid_param); - if (!IS_ERR(dentry)) - pid_files[i].dentry = dentry; - } -} - -static void intel_pstate_debug_hide_params(void) -{ - int i; - - if (IS_ERR_OR_NULL(debugfs_parent)) - return; - - for (i = 0; pid_files[i].name; i++) { - debugfs_remove(pid_files[i].dentry); - pid_files[i].dentry = NULL; - } - - debugfs_remove(debugfs_parent); - debugfs_parent = NULL; -} - -/************************** debugfs end ************************/ - /************************** sysfs begin ************************/ #define show_one(file_name, object) \ static ssize_t show_##file_name \ @@ -1622,7 +1437,7 @@ static inline int32_t get_avg_pstate(struct cpudata *cpu) cpu->sample.core_avg_perf); } -static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu) +static inline int32_t get_target_pstate(struct cpudata *cpu) { struct sample *sample = &cpu->sample; int32_t busy_frac, boost; @@ -1660,44 +1475,6 @@ static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu) return target; } -static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu) -{ - int32_t perf_scaled, max_pstate, current_pstate, sample_ratio; - u64 duration_ns; - - /* - * perf_scaled is the ratio of the average P-state during the last - * sampling period to the P-state requested last time (in percent). - * - * That measures the system's response to the previous P-state - * selection. - */ - max_pstate = cpu->pstate.max_pstate_physical; - current_pstate = cpu->pstate.current_pstate; - perf_scaled = mul_ext_fp(cpu->sample.core_avg_perf, - div_fp(100 * max_pstate, current_pstate)); - - /* - * Since our utilization update callback will not run unless we are - * in C0, check if the actual elapsed time is significantly greater (3x) - * than our sample interval. If it is, then we were idle for a long - * enough period of time to adjust our performance metric. - */ - duration_ns = cpu->sample.time - cpu->last_sample_time; - if ((s64)duration_ns > pid_params.sample_rate_ns * 3) { - sample_ratio = div_fp(pid_params.sample_rate_ns, duration_ns); - perf_scaled = mul_fp(perf_scaled, sample_ratio); - } else { - sample_ratio = div_fp(100 * (cpu->sample.mperf << cpu->aperf_mperf_shift), - cpu->sample.tsc); - if (sample_ratio < int_tofp(1)) - perf_scaled = 0; - } - - cpu->sample.busy_scaled = perf_scaled; - return cpu->pstate.current_pstate - pid_calc(&cpu->pid, perf_scaled); -} - static int intel_pstate_prepare_request(struct cpudata *cpu, int pstate) { int max_pstate = intel_pstate_get_base_pstate(cpu); @@ -1717,13 +1494,15 @@ static void intel_pstate_update_pstate(struct cpudata *cpu, int pstate) wrmsrl(MSR_IA32_PERF_CTL, pstate_funcs.get_val(cpu, pstate)); } -static void intel_pstate_adjust_pstate(struct cpudata *cpu, int target_pstate) +static void intel_pstate_adjust_pstate(struct cpudata *cpu) { int from = cpu->pstate.current_pstate; struct sample *sample; + int target_pstate; update_turbo_state(); + target_pstate = get_target_pstate(cpu); target_pstate = intel_pstate_prepare_request(cpu, target_pstate); trace_cpu_frequency(target_pstate * cpu->pstate.scaling, cpu->cpu); intel_pstate_update_pstate(cpu, target_pstate); @@ -1740,31 +1519,27 @@ static void intel_pstate_adjust_pstate(struct cpudata *cpu, int target_pstate) fp_toint(cpu->iowait_boost * 100)); } -static void intel_pstate_update_util_pid(struct update_util_data *data, - u64 time, unsigned int flags) -{ - struct cpudata *cpu = container_of(data, struct cpudata, update_util); - u64 delta_ns = time - cpu->sample.time; - - if ((s64)delta_ns < pid_params.sample_rate_ns) - return; - - if (intel_pstate_sample(cpu, time)) { - int target_pstate; - - target_pstate = get_target_pstate_use_performance(cpu); - intel_pstate_adjust_pstate(cpu, target_pstate); - } -} - static void intel_pstate_update_util(struct update_util_data *data, u64 time, unsigned int flags) { struct cpudata *cpu = container_of(data, struct cpudata, update_util); u64 delta_ns; + /* Don't allow remote callbacks */ + if (smp_processor_id() != cpu->cpu) + return; + if (flags & SCHED_CPUFREQ_IOWAIT) { cpu->iowait_boost = int_tofp(1); + cpu->last_update = time; + /* + * The last time the busy was 100% so P-state was max anyway + * so avoid overhead of computation. + */ + if (fp_toint(cpu->sample.busy_scaled) == 100) + return; + + goto set_pstate; } else if (cpu->iowait_boost) { /* Clear iowait_boost if the CPU may have been idle. */ delta_ns = time - cpu->last_update; @@ -1773,15 +1548,12 @@ static void intel_pstate_update_util(struct update_util_data *data, u64 time, } cpu->last_update = time; delta_ns = time - cpu->sample.time; - if ((s64)delta_ns < INTEL_PSTATE_DEFAULT_SAMPLING_INTERVAL) + if ((s64)delta_ns < INTEL_PSTATE_SAMPLING_INTERVAL) return; - if (intel_pstate_sample(cpu, time)) { - int target_pstate; - - target_pstate = get_target_pstate_use_cpu_load(cpu); - intel_pstate_adjust_pstate(cpu, target_pstate); - } +set_pstate: + if (intel_pstate_sample(cpu, time)) + intel_pstate_adjust_pstate(cpu); } static struct pstate_funcs core_funcs = { @@ -1791,7 +1563,6 @@ static struct pstate_funcs core_funcs = { .get_turbo = core_get_turbo_pstate, .get_scaling = core_get_scaling, .get_val = core_get_val, - .update_util = intel_pstate_update_util_pid, }; static const struct pstate_funcs silvermont_funcs = { @@ -1802,7 +1573,6 @@ static const struct pstate_funcs silvermont_funcs = { .get_val = atom_get_val, .get_scaling = silvermont_get_scaling, .get_vid = atom_get_vid, - .update_util = intel_pstate_update_util, }; static const struct pstate_funcs airmont_funcs = { @@ -1813,7 +1583,6 @@ static const struct pstate_funcs airmont_funcs = { .get_val = atom_get_val, .get_scaling = airmont_get_scaling, .get_vid = atom_get_vid, - .update_util = intel_pstate_update_util, }; static const struct pstate_funcs knl_funcs = { @@ -1824,7 +1593,6 @@ static const struct pstate_funcs knl_funcs = { .get_aperf_mperf_shift = knl_get_aperf_mperf_shift, .get_scaling = core_get_scaling, .get_val = core_get_val, - .update_util = intel_pstate_update_util_pid, }; static const struct pstate_funcs bxt_funcs = { @@ -1834,7 +1602,6 @@ static const struct pstate_funcs bxt_funcs = { .get_turbo = core_get_turbo_pstate, .get_scaling = core_get_scaling, .get_val = core_get_val, - .update_util = intel_pstate_update_util, }; #define ICPU(model, policy) \ @@ -1878,8 +1645,6 @@ static const struct x86_cpu_id intel_pstate_cpu_ee_disable_ids[] = { {} }; -static bool pid_in_use(void); - static int intel_pstate_init_cpu(unsigned int cpunum) { struct cpudata *cpu; @@ -1910,8 +1675,6 @@ static int intel_pstate_init_cpu(unsigned int cpunum) intel_pstate_disable_ee(cpunum); intel_pstate_hwp_enable(cpu); - } else if (pid_in_use()) { - intel_pstate_pid_reset(cpu); } intel_pstate_get_cpu_pstates(cpu); @@ -1934,7 +1697,7 @@ static void intel_pstate_set_update_util_hook(unsigned int cpu_num) /* Prevent intel_pstate_update_util() from using stale data. */ cpu->sample.time = 0; cpufreq_add_update_util_hook(cpu_num, &cpu->update_util, - pstate_funcs.update_util); + intel_pstate_update_util); cpu->update_util_set = true; } @@ -2132,7 +1895,6 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy) policy->cpuinfo.max_freq *= cpu->pstate.scaling; intel_pstate_init_acpi_perf_limits(policy); - cpumask_set_cpu(policy->cpu, policy->cpus); policy->fast_switch_possible = true; @@ -2146,7 +1908,6 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy) if (ret) return ret; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; if (IS_ENABLED(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE)) policy->policy = CPUFREQ_POLICY_PERFORMANCE; else @@ -2261,12 +2022,6 @@ static struct cpufreq_driver intel_cpufreq = { static struct cpufreq_driver *default_driver = &intel_pstate; -static bool pid_in_use(void) -{ - return intel_pstate_driver == &intel_pstate && - pstate_funcs.update_util == intel_pstate_update_util_pid; -} - static void intel_pstate_driver_cleanup(void) { unsigned int cpu; @@ -2301,9 +2056,6 @@ static int intel_pstate_register_driver(struct cpufreq_driver *driver) global.min_perf_pct = min_perf_pct_min(); - if (pid_in_use()) - intel_pstate_debug_expose_params(); - return 0; } @@ -2312,9 +2064,6 @@ static int intel_pstate_unregister_driver(void) if (hwp_active) return -EBUSY; - if (pid_in_use()) - intel_pstate_debug_hide_params(); - cpufreq_unregister_driver(intel_pstate_driver); intel_pstate_driver_cleanup(); @@ -2382,24 +2131,6 @@ static int __init intel_pstate_msrs_not_valid(void) return 0; } -#ifdef CONFIG_ACPI -static void intel_pstate_use_acpi_profile(void) -{ - switch (acpi_gbl_FADT.preferred_profile) { - case PM_MOBILE: - case PM_TABLET: - case PM_APPLIANCE_PC: - case PM_DESKTOP: - case PM_WORKSTATION: - pstate_funcs.update_util = intel_pstate_update_util; - } -} -#else -static void intel_pstate_use_acpi_profile(void) -{ -} -#endif - static void __init copy_cpu_funcs(struct pstate_funcs *funcs) { pstate_funcs.get_max = funcs->get_max; @@ -2409,10 +2140,7 @@ static void __init copy_cpu_funcs(struct pstate_funcs *funcs) pstate_funcs.get_scaling = funcs->get_scaling; pstate_funcs.get_val = funcs->get_val; pstate_funcs.get_vid = funcs->get_vid; - pstate_funcs.update_util = funcs->update_util; pstate_funcs.get_aperf_mperf_shift = funcs->get_aperf_mperf_shift; - - intel_pstate_use_acpi_profile(); } #ifdef CONFIG_ACPI @@ -2466,39 +2194,31 @@ enum { PPC, }; -struct hw_vendor_info { - u16 valid; - char oem_id[ACPI_OEM_ID_SIZE]; - char oem_table_id[ACPI_OEM_TABLE_ID_SIZE]; - int oem_pwr_table; -}; - /* Hardware vendor-specific info that has its own power management modes */ -static struct hw_vendor_info vendor_info[] __initdata = { - {1, "HP ", "ProLiant", PSS}, - {1, "ORACLE", "X4-2 ", PPC}, - {1, "ORACLE", "X4-2L ", PPC}, - {1, "ORACLE", "X4-2B ", PPC}, - {1, "ORACLE", "X3-2 ", PPC}, - {1, "ORACLE", "X3-2L ", PPC}, - {1, "ORACLE", "X3-2B ", PPC}, - {1, "ORACLE", "X4470M2 ", PPC}, - {1, "ORACLE", "X4270M3 ", PPC}, - {1, "ORACLE", "X4270M2 ", PPC}, - {1, "ORACLE", "X4170M2 ", PPC}, - {1, "ORACLE", "X4170 M3", PPC}, - {1, "ORACLE", "X4275 M3", PPC}, - {1, "ORACLE", "X6-2 ", PPC}, - {1, "ORACLE", "Sudbury ", PPC}, - {0, "", ""}, +static struct acpi_platform_list plat_info[] __initdata = { + {"HP ", "ProLiant", 0, ACPI_SIG_FADT, all_versions, 0, PSS}, + {"ORACLE", "X4-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4-2L ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4-2B ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X3-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X3-2L ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X3-2B ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4470M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4270M3 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4270M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4170M2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4170 M3", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X4275 M3", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "X6-2 ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + {"ORACLE", "Sudbury ", 0, ACPI_SIG_FADT, all_versions, 0, PPC}, + { } /* End */ }; static bool __init intel_pstate_platform_pwr_mgmt_exists(void) { - struct acpi_table_header hdr; - struct hw_vendor_info *v_info; const struct x86_cpu_id *id; u64 misc_pwr; + int idx; id = x86_match_cpu(intel_pstate_cpu_oob_ids); if (id) { @@ -2507,21 +2227,15 @@ static bool __init intel_pstate_platform_pwr_mgmt_exists(void) return true; } - if (acpi_disabled || - ACPI_FAILURE(acpi_get_table_header(ACPI_SIG_FADT, 0, &hdr))) + idx = acpi_match_platform_list(plat_info); + if (idx < 0) return false; - for (v_info = vendor_info; v_info->valid; v_info++) { - if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && - !strncmp(hdr.oem_table_id, v_info->oem_table_id, - ACPI_OEM_TABLE_ID_SIZE)) - switch (v_info->oem_pwr_table) { - case PSS: - return intel_pstate_no_acpi_pss(); - case PPC: - return intel_pstate_has_acpi_ppc() && - (!force_load); - } + switch (plat_info[idx].data) { + case PSS: + return intel_pstate_no_acpi_pss(); + case PPC: + return intel_pstate_has_acpi_ppc() && !force_load; } return false; @@ -2556,9 +2270,7 @@ static int __init intel_pstate_init(void) if (x86_match_cpu(hwp_support_ids)) { copy_cpu_funcs(&core_funcs); - if (no_hwp) { - pstate_funcs.update_util = intel_pstate_update_util; - } else { + if (!no_hwp) { hwp_active++; intel_pstate.attr = hwp_cpufreq_attrs; goto hwp_cpu_matched; diff --git a/drivers/cpufreq/longrun.c b/drivers/cpufreq/longrun.c index 074971b12635..542aa9adba1a 100644 --- a/drivers/cpufreq/longrun.c +++ b/drivers/cpufreq/longrun.c @@ -270,7 +270,6 @@ static int longrun_cpu_init(struct cpufreq_policy *policy) /* cpuinfo and default policy values */ policy->cpuinfo.min_freq = longrun_low_freq; policy->cpuinfo.max_freq = longrun_high_freq; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; longrun_get_policy(policy); return 0; diff --git a/drivers/cpufreq/loongson2_cpufreq.c b/drivers/cpufreq/loongson2_cpufreq.c index 9ac27b22476c..da344696beed 100644 --- a/drivers/cpufreq/loongson2_cpufreq.c +++ b/drivers/cpufreq/loongson2_cpufreq.c @@ -114,7 +114,7 @@ static struct cpufreq_driver loongson2_cpufreq_driver = { .attr = cpufreq_generic_attr, }; -static struct platform_device_id platform_device_ids[] = { +static const struct platform_device_id platform_device_ids[] = { { .name = "loongson2_cpufreq", }, diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index f9f00fb4bc3a..18c4bd9a5c65 100644 --- a/drivers/cpufreq/mt8173-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -507,7 +507,7 @@ static int mtk_cpufreq_exit(struct cpufreq_policy *policy) return 0; } -static struct cpufreq_driver mt8173_cpufreq_driver = { +static struct cpufreq_driver mtk_cpufreq_driver = { .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK | CPUFREQ_HAVE_GOVERNOR_PER_POLICY, .verify = cpufreq_generic_frequency_table_verify, @@ -520,7 +520,7 @@ static struct cpufreq_driver mt8173_cpufreq_driver = { .attr = cpufreq_generic_attr, }; -static int mt8173_cpufreq_probe(struct platform_device *pdev) +static int mtk_cpufreq_probe(struct platform_device *pdev) { struct mtk_cpu_dvfs_info *info, *tmp; int cpu, ret; @@ -547,7 +547,7 @@ static int mt8173_cpufreq_probe(struct platform_device *pdev) list_add(&info->list_head, &dvfs_info_list); } - ret = cpufreq_register_driver(&mt8173_cpufreq_driver); + ret = cpufreq_register_driver(&mtk_cpufreq_driver); if (ret) { dev_err(&pdev->dev, "failed to register mtk cpufreq driver\n"); goto release_dvfs_info_list; @@ -564,15 +564,18 @@ release_dvfs_info_list: return ret; } -static struct platform_driver mt8173_cpufreq_platdrv = { +static struct platform_driver mtk_cpufreq_platdrv = { .driver = { - .name = "mt8173-cpufreq", + .name = "mtk-cpufreq", }, - .probe = mt8173_cpufreq_probe, + .probe = mtk_cpufreq_probe, }; /* List of machines supported by this driver */ -static const struct of_device_id mt8173_cpufreq_machines[] __initconst = { +static const struct of_device_id mtk_cpufreq_machines[] __initconst = { + { .compatible = "mediatek,mt2701", }, + { .compatible = "mediatek,mt7622", }, + { .compatible = "mediatek,mt7623", }, { .compatible = "mediatek,mt817x", }, { .compatible = "mediatek,mt8173", }, { .compatible = "mediatek,mt8176", }, @@ -580,7 +583,7 @@ static const struct of_device_id mt8173_cpufreq_machines[] __initconst = { { } }; -static int __init mt8173_cpufreq_driver_init(void) +static int __init mtk_cpufreq_driver_init(void) { struct device_node *np; const struct of_device_id *match; @@ -591,14 +594,14 @@ static int __init mt8173_cpufreq_driver_init(void) if (!np) return -ENODEV; - match = of_match_node(mt8173_cpufreq_machines, np); + match = of_match_node(mtk_cpufreq_machines, np); of_node_put(np); if (!match) { - pr_warn("Machine is not compatible with mt8173-cpufreq\n"); + pr_warn("Machine is not compatible with mtk-cpufreq\n"); return -ENODEV; } - err = platform_driver_register(&mt8173_cpufreq_platdrv); + err = platform_driver_register(&mtk_cpufreq_platdrv); if (err) return err; @@ -608,7 +611,7 @@ static int __init mt8173_cpufreq_driver_init(void) * and the device registration codes are put here to handle defer * probing. */ - pdev = platform_device_register_simple("mt8173-cpufreq", -1, NULL, 0); + pdev = platform_device_register_simple("mtk-cpufreq", -1, NULL, 0); if (IS_ERR(pdev)) { pr_err("failed to register mtk-cpufreq platform device\n"); return PTR_ERR(pdev); @@ -616,4 +619,4 @@ static int __init mt8173_cpufreq_driver_init(void) return 0; } -device_initcall(mt8173_cpufreq_driver_init); +device_initcall(mtk_cpufreq_driver_init); diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c index ff44016ea031..61ae06ca008e 100644 --- a/drivers/cpufreq/pmac32-cpufreq.c +++ b/drivers/cpufreq/pmac32-cpufreq.c @@ -442,7 +442,8 @@ static struct cpufreq_driver pmac_cpufreq_driver = { .init = pmac_cpufreq_cpu_init, .suspend = pmac_cpufreq_suspend, .resume = pmac_cpufreq_resume, - .flags = CPUFREQ_PM_NO_WARN, + .flags = CPUFREQ_PM_NO_WARN | + CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .attr = cpufreq_generic_attr, .name = "powermac", }; @@ -626,14 +627,16 @@ static int __init pmac_cpufreq_setup(void) if (!value) goto out; cur_freq = (*value) / 1000; - transition_latency = CPUFREQ_ETERNAL; /* Check for 7447A based MacRISC3 */ if (of_machine_is_compatible("MacRISC3") && of_get_property(cpunode, "dynamic-power-step", NULL) && PVR_VER(mfspr(SPRN_PVR)) == 0x8003) { pmac_cpufreq_init_7447A(cpunode); + + /* Allow dynamic switching */ transition_latency = 8000000; + pmac_cpufreq_driver.flags &= ~CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING; /* Check for other MacRISC3 machines */ } else if (of_machine_is_compatible("PowerBook3,4") || of_machine_is_compatible("PowerBook3,5") || diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 267e0894c62d..be623dd7b9f2 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -516,7 +516,7 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpunode) goto bail; } - DBG("cpufreq: i2c clock chip found: %s\n", hwclock->full_name); + DBG("cpufreq: i2c clock chip found: %pOF\n", hwclock); /* Now get all the platform functions */ pfunc_cpu_getfreq = diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index f82074eea779..5d31c2db12a3 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -602,6 +602,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev) } clk_base = of_iomap(np, 0); + of_node_put(np); if (!clk_base) { pr_err("%s: failed to map clock registers\n", __func__); return -EFAULT; @@ -612,6 +613,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev) if (id < 0 || id >= ARRAY_SIZE(dmc_base)) { pr_err("%s: failed to get alias of dmc node '%s'\n", __func__, np->name); + of_node_put(np); return id; } @@ -619,6 +621,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev) if (!dmc_base[id]) { pr_err("%s: failed to map dmc%d registers\n", __func__, id); + of_node_put(np); return -EFAULT; } } diff --git a/drivers/cpufreq/sa1100-cpufreq.c b/drivers/cpufreq/sa1100-cpufreq.c index 728eab77e8e0..e2d8a77c36d5 100644 --- a/drivers/cpufreq/sa1100-cpufreq.c +++ b/drivers/cpufreq/sa1100-cpufreq.c @@ -197,11 +197,12 @@ 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, CPUFREQ_ETERNAL); + return cpufreq_generic_init(policy, sa11x0_freq_table, 0); } static struct cpufreq_driver sa1100_driver __refdata = { - .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, + .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK | + CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = sa1100_target, .get = sa11x0_getspeed, diff --git a/drivers/cpufreq/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c index 2bac9b6cfeea..66e5fb088ecc 100644 --- a/drivers/cpufreq/sa1110-cpufreq.c +++ b/drivers/cpufreq/sa1110-cpufreq.c @@ -306,13 +306,14 @@ 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, CPUFREQ_ETERNAL); + return cpufreq_generic_init(policy, sa11x0_freq_table, 0); } /* sa1110_driver needs __refdata because it must remain after init registers * it with cpufreq_register_driver() */ static struct cpufreq_driver sa1110_driver __refdata = { - .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, + .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK | + CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = sa1110_target, .get = sa11x0_getspeed, diff --git a/drivers/cpufreq/sh-cpufreq.c b/drivers/cpufreq/sh-cpufreq.c index 719c3d9f07fb..28893d435cf5 100644 --- a/drivers/cpufreq/sh-cpufreq.c +++ b/drivers/cpufreq/sh-cpufreq.c @@ -137,8 +137,6 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy) (clk_round_rate(cpuclk, ~0UL) + 500) / 1000; } - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; - dev_info(dev, "CPU Frequencies - Minimum %u.%03u MHz, " "Maximum %u.%03u MHz.\n", policy->min / 1000, policy->min % 1000, @@ -159,6 +157,7 @@ static int sh_cpufreq_cpu_exit(struct cpufreq_policy *policy) static struct cpufreq_driver sh_cpufreq_driver = { .name = "sh", + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .get = sh_cpufreq_get, .target = sh_cpufreq_target, .verify = sh_cpufreq_verify, diff --git a/drivers/cpufreq/speedstep-ich.c b/drivers/cpufreq/speedstep-ich.c index b86953a3ddc4..0412a246a785 100644 --- a/drivers/cpufreq/speedstep-ich.c +++ b/drivers/cpufreq/speedstep-ich.c @@ -207,7 +207,7 @@ static unsigned int speedstep_detect_chipset(void) * 8100 which use a pretty old revision of the 82815 * host bridge. Abort on these systems. */ - static struct pci_dev *hostbridge; + struct pci_dev *hostbridge; hostbridge = pci_get_subsys(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_MC, diff --git a/drivers/cpufreq/speedstep-lib.c b/drivers/cpufreq/speedstep-lib.c index 1b8062182c81..ccab452a4ef5 100644 --- a/drivers/cpufreq/speedstep-lib.c +++ b/drivers/cpufreq/speedstep-lib.c @@ -35,7 +35,7 @@ static int relaxed_check; static unsigned int pentium3_get_frequency(enum speedstep_processor processor) { /* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */ - struct { + static const struct { unsigned int ratio; /* Frequency Multiplier (x10) */ u8 bitmap; /* power on configuration bits [27, 25:22] (in MSR 0x2a) */ @@ -58,7 +58,7 @@ static unsigned int pentium3_get_frequency(enum speedstep_processor processor) }; /* PIII(-M) FSB settings: see table b1-b of 24547206.pdf */ - struct { + static const struct { unsigned int value; /* Front Side Bus speed in MHz */ u8 bitmap; /* power on configuration bits [18: 19] (in MSR 0x2a) */ diff --git a/drivers/cpufreq/speedstep-smi.c b/drivers/cpufreq/speedstep-smi.c index 37b30071c220..d23f24ccff38 100644 --- a/drivers/cpufreq/speedstep-smi.c +++ b/drivers/cpufreq/speedstep-smi.c @@ -266,7 +266,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy) pr_debug("workaround worked.\n"); } - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; return cpufreq_table_validate_and_show(policy, speedstep_freqs); } @@ -290,6 +289,7 @@ static int speedstep_resume(struct cpufreq_policy *policy) static struct cpufreq_driver speedstep_driver = { .name = "speedstep-smi", + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = speedstep_target, .init = speedstep_cpu_init, diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c index d2d0430d09d4..47105735df12 100644 --- a/drivers/cpufreq/sti-cpufreq.c +++ b/drivers/cpufreq/sti-cpufreq.c @@ -65,8 +65,8 @@ static int sti_cpufreq_fetch_major(void) { ret = of_property_read_u32_index(np, "st,syscfg", MAJOR_ID_INDEX, &major_offset); if (ret) { - dev_err(dev, "No major number offset provided in %s [%d]\n", - np->full_name, ret); + dev_err(dev, "No major number offset provided in %pOF [%d]\n", + np, ret); return ret; } @@ -92,8 +92,8 @@ static int sti_cpufreq_fetch_minor(void) MINOR_ID_INDEX, &minor_offset); if (ret) { dev_err(dev, - "No minor number offset provided %s [%d]\n", - np->full_name, ret); + "No minor number offset provided %pOF [%d]\n", + np, ret); return ret; } diff --git a/drivers/cpufreq/tango-cpufreq.c b/drivers/cpufreq/tango-cpufreq.c new file mode 100644 index 000000000000..89a7f860bfe8 --- /dev/null +++ b/drivers/cpufreq/tango-cpufreq.c @@ -0,0 +1,38 @@ +#include <linux/of.h> +#include <linux/cpu.h> +#include <linux/clk.h> +#include <linux/pm_opp.h> +#include <linux/platform_device.h> + +static const struct of_device_id machines[] __initconst = { + { .compatible = "sigma,tango4" }, + { /* sentinel */ } +}; + +static int __init tango_cpufreq_init(void) +{ + struct device *cpu_dev = get_cpu_device(0); + unsigned long max_freq; + struct clk *cpu_clk; + void *res; + + if (!of_match_node(machines, of_root)) + return -ENODEV; + + cpu_clk = clk_get(cpu_dev, NULL); + if (IS_ERR(cpu_clk)) + return -ENODEV; + + max_freq = clk_get_rate(cpu_clk); + + dev_pm_opp_add(cpu_dev, max_freq / 1, 0); + dev_pm_opp_add(cpu_dev, max_freq / 2, 0); + dev_pm_opp_add(cpu_dev, max_freq / 3, 0); + dev_pm_opp_add(cpu_dev, max_freq / 5, 0); + dev_pm_opp_add(cpu_dev, max_freq / 9, 0); + + res = platform_device_register_data(NULL, "cpufreq-dt", -1, NULL, 0); + + return PTR_ERR_OR_ZERO(res); +} +device_initcall(tango_cpufreq_init); diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c index a7b5658c0460..b29cd3398463 100644 --- a/drivers/cpufreq/ti-cpufreq.c +++ b/drivers/cpufreq/ti-cpufreq.c @@ -245,8 +245,6 @@ static int ti_cpufreq_init(void) if (ret) goto fail_put_node; - of_node_put(opp_data->opp_node); - ret = PTR_ERR_OR_ZERO(dev_pm_opp_set_supported_hw(opp_data->cpu_dev, version, VERSION_COUNT)); if (ret) { @@ -255,6 +253,8 @@ static int ti_cpufreq_init(void) goto fail_put_node; } + of_node_put(opp_data->opp_node); + register_cpufreq_dt: platform_device_register_simple("cpufreq-dt", -1, NULL, 0); diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c index 6f9dfa80563a..db62d9844751 100644 --- a/drivers/cpufreq/unicore2-cpufreq.c +++ b/drivers/cpufreq/unicore2-cpufreq.c @@ -58,13 +58,12 @@ static int __init ucv2_cpu_init(struct cpufreq_policy *policy) policy->min = policy->cpuinfo.min_freq = 250000; policy->max = policy->cpuinfo.max_freq = 1000000; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; policy->clk = clk_get(NULL, "MAIN_CLK"); return PTR_ERR_OR_ZERO(policy->clk); } static struct cpufreq_driver ucv2_driver = { - .flags = CPUFREQ_STICKY, + .flags = CPUFREQ_STICKY | CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = ucv2_verify_speed, .target = ucv2_target, .get = cpufreq_generic_get, |