From edb10c11c9af64efc8cdb001ada9792e0b2eef42 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Mon, 10 Dec 2012 16:25:38 +0100 Subject: cpufreq: Give driver used for dbx500 family a more generic name This driver doesn't only handle cpufreq functionality for the db8500 anymore. There are new variants which rely on it too. Let's make the name a bit more generic. Signed-off-by: Lee Jones Signed-off-by: Ulf Hansson Acked-by: Rafael J. Wysocki Signed-off-by: Linus Walleij --- drivers/cpufreq/Makefile | 2 +- drivers/cpufreq/db8500-cpufreq.c | 179 --------------------------------------- drivers/cpufreq/dbx500-cpufreq.c | 179 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 180 insertions(+), 180 deletions(-) delete mode 100644 drivers/cpufreq/db8500-cpufreq.c create mode 100644 drivers/cpufreq/dbx500-cpufreq.c (limited to 'drivers/cpufreq') diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 1f254ec0..6700251 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -41,7 +41,7 @@ obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o ################################################################################## # ARM SoC drivers -obj-$(CONFIG_UX500_SOC_DB8500) += db8500-cpufreq.o +obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o obj-$(CONFIG_ARM_S3C64XX_CPUFREQ) += s3c64xx-cpufreq.o obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o diff --git a/drivers/cpufreq/db8500-cpufreq.c b/drivers/cpufreq/db8500-cpufreq.c deleted file mode 100644 index 4f154bc..0000000 --- a/drivers/cpufreq/db8500-cpufreq.c +++ /dev/null @@ -1,179 +0,0 @@ -/* - * Copyright (C) STMicroelectronics 2009 - * Copyright (C) ST-Ericsson SA 2010 - * - * License Terms: GNU General Public License v2 - * Author: Sundar Iyer - * Author: Martin Persson - * Author: Jonas Aaberg - * - */ -#include -#include -#include -#include -#include -#include -#include -#include - -static struct cpufreq_frequency_table *freq_table; -static struct clk *armss_clk; - -static struct freq_attr *db8500_cpufreq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static int db8500_cpufreq_verify_speed(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, freq_table); -} - -static int db8500_cpufreq_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) -{ - struct cpufreq_freqs freqs; - unsigned int idx; - - /* scale the target frequency to one of the extremes supported */ - if (target_freq < policy->cpuinfo.min_freq) - target_freq = policy->cpuinfo.min_freq; - if (target_freq > policy->cpuinfo.max_freq) - target_freq = policy->cpuinfo.max_freq; - - /* Lookup the next frequency */ - if (cpufreq_frequency_table_target - (policy, freq_table, target_freq, relation, &idx)) { - return -EINVAL; - } - - freqs.old = policy->cur; - freqs.new = freq_table[idx].frequency; - - if (freqs.old == freqs.new) - return 0; - - /* pre-change notification */ - for_each_cpu(freqs.cpu, policy->cpus) - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - - /* update armss clk frequency */ - if (clk_set_rate(armss_clk, freq_table[idx].frequency * 1000)) { - pr_err("db8500-cpufreq: Failed to update armss clk\n"); - return -EINVAL; - } - - /* post change notification */ - for_each_cpu(freqs.cpu, policy->cpus) - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - - return 0; -} - -static unsigned int db8500_cpufreq_getspeed(unsigned int cpu) -{ - int i = 0; - unsigned long freq = clk_get_rate(armss_clk) / 1000; - - while (freq_table[i].frequency != CPUFREQ_TABLE_END) { - if (freq <= freq_table[i].frequency) - return freq_table[i].frequency; - i++; - } - - /* We could not find a corresponding frequency. */ - pr_err("db8500-cpufreq: Failed to find cpufreq speed\n"); - return 0; -} - -static int __cpuinit db8500_cpufreq_init(struct cpufreq_policy *policy) -{ - int i = 0; - int res; - - armss_clk = clk_get(NULL, "armss"); - if (IS_ERR(armss_clk)) { - pr_err("db8500-cpufreq : Failed to get armss clk\n"); - return PTR_ERR(armss_clk); - } - - pr_info("db8500-cpufreq : Available frequencies:\n"); - while (freq_table[i].frequency != CPUFREQ_TABLE_END) { - pr_info(" %d Mhz\n", freq_table[i].frequency/1000); - i++; - } - - /* get policy fields based on the table */ - res = cpufreq_frequency_table_cpuinfo(policy, freq_table); - if (!res) - cpufreq_frequency_table_get_attr(freq_table, policy->cpu); - else { - pr_err("db8500-cpufreq : Failed to read policy table\n"); - clk_put(armss_clk); - return res; - } - - policy->min = policy->cpuinfo.min_freq; - policy->max = policy->cpuinfo.max_freq; - policy->cur = db8500_cpufreq_getspeed(policy->cpu); - policy->governor = CPUFREQ_DEFAULT_GOVERNOR; - - /* - * FIXME : Need to take time measurement across the target() - * function with no/some/all drivers in the notification - * list. - */ - policy->cpuinfo.transition_latency = 20 * 1000; /* in ns */ - - /* policy sharing between dual CPUs */ - cpumask_copy(policy->cpus, cpu_present_mask); - - policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; - - return 0; -} - -static struct cpufreq_driver db8500_cpufreq_driver = { - .flags = CPUFREQ_STICKY, - .verify = db8500_cpufreq_verify_speed, - .target = db8500_cpufreq_target, - .get = db8500_cpufreq_getspeed, - .init = db8500_cpufreq_init, - .name = "DB8500", - .attr = db8500_cpufreq_attr, -}; - -static int db8500_cpufreq_probe(struct platform_device *pdev) -{ - freq_table = dev_get_platdata(&pdev->dev); - - if (!freq_table) { - pr_err("db8500-cpufreq: Failed to fetch cpufreq table\n"); - return -ENODEV; - } - - return cpufreq_register_driver(&db8500_cpufreq_driver); -} - -static struct platform_driver db8500_cpufreq_plat_driver = { - .driver = { - .name = "cpufreq-u8500", - .owner = THIS_MODULE, - }, - .probe = db8500_cpufreq_probe, -}; - -static int __init db8500_cpufreq_register(void) -{ - if (!cpu_is_u8500_family()) - return -ENODEV; - - pr_info("cpufreq for DB8500 started\n"); - return platform_driver_register(&db8500_cpufreq_plat_driver); -} -device_initcall(db8500_cpufreq_register); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("cpufreq driver for DB8500"); diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c new file mode 100644 index 0000000..0a411b5 --- /dev/null +++ b/drivers/cpufreq/dbx500-cpufreq.c @@ -0,0 +1,179 @@ +/* + * Copyright (C) STMicroelectronics 2009 + * Copyright (C) ST-Ericsson SA 2010 + * + * License Terms: GNU General Public License v2 + * Author: Sundar Iyer + * Author: Martin Persson + * Author: Jonas Aaberg + * + */ +#include +#include +#include +#include +#include +#include +#include +#include + +static struct cpufreq_frequency_table *freq_table; +static struct clk *armss_clk; + +static struct freq_attr *dbx500_cpufreq_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, +}; + +static int dbx500_cpufreq_verify_speed(struct cpufreq_policy *policy) +{ + return cpufreq_frequency_table_verify(policy, freq_table); +} + +static int dbx500_cpufreq_target(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation) +{ + struct cpufreq_freqs freqs; + unsigned int idx; + + /* scale the target frequency to one of the extremes supported */ + if (target_freq < policy->cpuinfo.min_freq) + target_freq = policy->cpuinfo.min_freq; + if (target_freq > policy->cpuinfo.max_freq) + target_freq = policy->cpuinfo.max_freq; + + /* Lookup the next frequency */ + if (cpufreq_frequency_table_target + (policy, freq_table, target_freq, relation, &idx)) { + return -EINVAL; + } + + freqs.old = policy->cur; + freqs.new = freq_table[idx].frequency; + + if (freqs.old == freqs.new) + return 0; + + /* pre-change notification */ + for_each_cpu(freqs.cpu, policy->cpus) + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + + /* update armss clk frequency */ + if (clk_set_rate(armss_clk, freq_table[idx].frequency * 1000)) { + pr_err("dbx500-cpufreq: Failed to update armss clk\n"); + return -EINVAL; + } + + /* post change notification */ + for_each_cpu(freqs.cpu, policy->cpus) + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + + return 0; +} + +static unsigned int dbx500_cpufreq_getspeed(unsigned int cpu) +{ + int i = 0; + unsigned long freq = clk_get_rate(armss_clk) / 1000; + + while (freq_table[i].frequency != CPUFREQ_TABLE_END) { + if (freq <= freq_table[i].frequency) + return freq_table[i].frequency; + i++; + } + + /* We could not find a corresponding frequency. */ + pr_err("dbx500-cpufreq: Failed to find cpufreq speed\n"); + return 0; +} + +static int __cpuinit dbx500_cpufreq_init(struct cpufreq_policy *policy) +{ + int i = 0; + int res; + + armss_clk = clk_get(NULL, "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"); + while (freq_table[i].frequency != CPUFREQ_TABLE_END) { + pr_info(" %d Mhz\n", freq_table[i].frequency/1000); + i++; + } + + /* get policy fields based on the table */ + res = cpufreq_frequency_table_cpuinfo(policy, freq_table); + if (!res) + cpufreq_frequency_table_get_attr(freq_table, policy->cpu); + else { + pr_err("dbx500-cpufreq : Failed to read policy table\n"); + clk_put(armss_clk); + return res; + } + + policy->min = policy->cpuinfo.min_freq; + policy->max = policy->cpuinfo.max_freq; + policy->cur = dbx500_cpufreq_getspeed(policy->cpu); + policy->governor = CPUFREQ_DEFAULT_GOVERNOR; + + /* + * FIXME : Need to take time measurement across the target() + * function with no/some/all drivers in the notification + * list. + */ + policy->cpuinfo.transition_latency = 20 * 1000; /* in ns */ + + /* policy sharing between dual CPUs */ + cpumask_copy(policy->cpus, cpu_present_mask); + + policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; + + return 0; +} + +static struct cpufreq_driver dbx500_cpufreq_driver = { + .flags = CPUFREQ_STICKY, + .verify = dbx500_cpufreq_verify_speed, + .target = dbx500_cpufreq_target, + .get = dbx500_cpufreq_getspeed, + .init = dbx500_cpufreq_init, + .name = "DBX500", + .attr = dbx500_cpufreq_attr, +}; + +static int dbx500_cpufreq_probe(struct platform_device *pdev) +{ + freq_table = dev_get_platdata(&pdev->dev); + + if (!freq_table) { + pr_err("dbx500-cpufreq: Failed to fetch cpufreq table\n"); + return -ENODEV; + } + + return cpufreq_register_driver(&dbx500_cpufreq_driver); +} + +static struct platform_driver dbx500_cpufreq_plat_driver = { + .driver = { + .name = "cpufreq-ux500", + .owner = THIS_MODULE, + }, + .probe = dbx500_cpufreq_probe, +}; + +static int __init dbx500_cpufreq_register(void) +{ + if (!cpu_is_u8500_family()) + return -ENODEV; + + pr_info("cpufreq for DBX500 started\n"); + return platform_driver_register(&dbx500_cpufreq_plat_driver); +} +device_initcall(dbx500_cpufreq_register); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("cpufreq driver for DBX500"); -- cgit v1.1