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authorLee Jones <lee.jones@linaro.org>2012-12-10 16:25:38 +0100
committerLinus Walleij <linus.walleij@linaro.org>2013-01-07 16:03:01 +0100
commitedb10c11c9af64efc8cdb001ada9792e0b2eef42 (patch)
tree8e076e21f54ece5545fe6db87c3916c813e23a42 /drivers/cpufreq/db8500-cpufreq.c
parentLinux 3.8-rc2 (diff)
downloadlinux-dev-edb10c11c9af64efc8cdb001ada9792e0b2eef42.tar.xz
linux-dev-edb10c11c9af64efc8cdb001ada9792e0b2eef42.zip
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.c179
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 4f154bc0ebe4..000000000000
--- 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");