diff options
author | Lee Jones <lee.jones@linaro.org> | 2012-12-10 16:25:38 +0100 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2013-01-07 16:03:01 +0100 |
commit | edb10c11c9af64efc8cdb001ada9792e0b2eef42 (patch) | |
tree | 8e076e21f54ece5545fe6db87c3916c813e23a42 /drivers/cpufreq/db8500-cpufreq.c | |
parent | d1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff) |
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 <lee.jones@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/cpufreq/db8500-cpufreq.c')
-rw-r--r-- | drivers/cpufreq/db8500-cpufreq.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/drivers/cpufreq/db8500-cpufreq.c b/drivers/cpufreq/db8500-cpufreq.c deleted file mode 100644 index 4f154bc0ebe..00000000000 --- 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 <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/delay.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <mach/id.h> - -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"); |