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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c')
-rw-r--r--ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c296
1 files changed, 0 insertions, 296 deletions
diff --git a/ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c b/ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c
deleted file mode 100644
index b243a7ee..00000000
--- a/ANDROID_3.4.5/drivers/cpufreq/exynos-cpufreq.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * EXYNOS - CPU frequency scaling support for EXYNOS series
- *
- * 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.
-*/
-
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/regulator/consumer.h>
-#include <linux/cpufreq.h>
-#include <linux/suspend.h>
-
-#include <mach/cpufreq.h>
-
-#include <plat/cpu.h>
-
-static struct exynos_dvfs_info *exynos_info;
-
-static struct regulator *arm_regulator;
-static struct cpufreq_freqs freqs;
-
-static unsigned int locking_frequency;
-static bool frequency_locked;
-static DEFINE_MUTEX(cpufreq_lock);
-
-int exynos_verify_speed(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy,
- exynos_info->freq_table);
-}
-
-unsigned int exynos_getspeed(unsigned int cpu)
-{
- return clk_get_rate(exynos_info->cpu_clk) / 1000;
-}
-
-static int exynos_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int index, old_index;
- unsigned int arm_volt, safe_arm_volt = 0;
- int ret = 0;
- struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
- unsigned int *volt_table = exynos_info->volt_table;
- unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz;
-
- mutex_lock(&cpufreq_lock);
-
- freqs.old = policy->cur;
-
- if (frequency_locked && target_freq != locking_frequency) {
- ret = -EAGAIN;
- goto out;
- }
-
- if (cpufreq_frequency_table_target(policy, freq_table,
- freqs.old, relation, &old_index)) {
- ret = -EINVAL;
- goto out;
- }
-
- if (cpufreq_frequency_table_target(policy, freq_table,
- target_freq, relation, &index)) {
- ret = -EINVAL;
- goto out;
- }
-
- freqs.new = freq_table[index].frequency;
- freqs.cpu = policy->cpu;
-
- /*
- * ARM clock source will be changed APLL to MPLL temporary
- * To support this level, need to control regulator for
- * required voltage level
- */
- if (exynos_info->need_apll_change != NULL) {
- if (exynos_info->need_apll_change(old_index, index) &&
- (freq_table[index].frequency < mpll_freq_khz) &&
- (freq_table[old_index].frequency < mpll_freq_khz))
- safe_arm_volt = volt_table[exynos_info->pll_safe_idx];
- }
- arm_volt = volt_table[index];
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
- /* When the new frequency is higher than current frequency */
- if ((freqs.new > freqs.old) && !safe_arm_volt) {
- /* Firstly, voltage up to increase frequency */
- regulator_set_voltage(arm_regulator, arm_volt,
- arm_volt);
- }
-
- if (safe_arm_volt)
- regulator_set_voltage(arm_regulator, safe_arm_volt,
- safe_arm_volt);
- if (freqs.new != freqs.old)
- exynos_info->set_freq(old_index, index);
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
- /* When the new frequency is lower than current frequency */
- if ((freqs.new < freqs.old) ||
- ((freqs.new > freqs.old) && safe_arm_volt)) {
- /* down the voltage after frequency change */
- regulator_set_voltage(arm_regulator, arm_volt,
- arm_volt);
- }
-
-out:
- mutex_unlock(&cpufreq_lock);
-
- return ret;
-}
-
-#ifdef CONFIG_PM
-static int exynos_cpufreq_suspend(struct cpufreq_policy *policy)
-{
- return 0;
-}
-
-static int exynos_cpufreq_resume(struct cpufreq_policy *policy)
-{
- return 0;
-}
-#endif
-
-/**
- * exynos_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume
- * context
- * @notifier
- * @pm_event
- * @v
- *
- * While frequency_locked == true, target() ignores every frequency but
- * locking_frequency. The locking_frequency value is the initial frequency,
- * which is set by the bootloader. In order to eliminate possible
- * inconsistency in clock values, we save and restore frequencies during
- * suspend and resume and block CPUFREQ activities. Note that the standard
- * suspend/resume cannot be used as they are too deep (syscore_ops) for
- * regulator actions.
- */
-static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier,
- unsigned long pm_event, void *v)
-{
- struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */
- static unsigned int saved_frequency;
- unsigned int temp;
-
- mutex_lock(&cpufreq_lock);
- switch (pm_event) {
- case PM_SUSPEND_PREPARE:
- if (frequency_locked)
- goto out;
-
- frequency_locked = true;
-
- if (locking_frequency) {
- saved_frequency = exynos_getspeed(0);
-
- mutex_unlock(&cpufreq_lock);
- exynos_target(policy, locking_frequency,
- CPUFREQ_RELATION_H);
- mutex_lock(&cpufreq_lock);
- }
- break;
-
- case PM_POST_SUSPEND:
- if (saved_frequency) {
- /*
- * While frequency_locked, only locking_frequency
- * is valid for target(). In order to use
- * saved_frequency while keeping frequency_locked,
- * we temporarly overwrite locking_frequency.
- */
- temp = locking_frequency;
- locking_frequency = saved_frequency;
-
- mutex_unlock(&cpufreq_lock);
- exynos_target(policy, locking_frequency,
- CPUFREQ_RELATION_H);
- mutex_lock(&cpufreq_lock);
-
- locking_frequency = temp;
- }
- frequency_locked = false;
- break;
- }
-out:
- mutex_unlock(&cpufreq_lock);
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block exynos_cpufreq_nb = {
- .notifier_call = exynos_cpufreq_pm_notifier,
-};
-
-static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
- policy->cur = policy->min = policy->max = exynos_getspeed(policy->cpu);
-
- cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu);
-
- locking_frequency = exynos_getspeed(0);
-
- /* set the transition latency value */
- policy->cpuinfo.transition_latency = 100000;
-
- /*
- * EXYNOS4 multi-core processors has 2 cores
- * that the frequency cannot be set independently.
- * Each cpu is bound to the same speed.
- * So the affected cpu is all of the cpus.
- */
- if (num_online_cpus() == 1) {
- cpumask_copy(policy->related_cpus, cpu_possible_mask);
- cpumask_copy(policy->cpus, cpu_online_mask);
- } else {
- cpumask_setall(policy->cpus);
- }
-
- return cpufreq_frequency_table_cpuinfo(policy, exynos_info->freq_table);
-}
-
-static struct cpufreq_driver exynos_driver = {
- .flags = CPUFREQ_STICKY,
- .verify = exynos_verify_speed,
- .target = exynos_target,
- .get = exynos_getspeed,
- .init = exynos_cpufreq_cpu_init,
- .name = "exynos_cpufreq",
-#ifdef CONFIG_PM
- .suspend = exynos_cpufreq_suspend,
- .resume = exynos_cpufreq_resume,
-#endif
-};
-
-static int __init exynos_cpufreq_init(void)
-{
- int ret = -EINVAL;
-
- exynos_info = kzalloc(sizeof(struct exynos_dvfs_info), GFP_KERNEL);
- if (!exynos_info)
- return -ENOMEM;
-
- if (soc_is_exynos4210())
- ret = exynos4210_cpufreq_init(exynos_info);
- else if (soc_is_exynos4212() || soc_is_exynos4412())
- ret = exynos4x12_cpufreq_init(exynos_info);
- else if (soc_is_exynos5250())
- ret = exynos5250_cpufreq_init(exynos_info);
- else
- pr_err("%s: CPU type not found\n", __func__);
-
- if (ret)
- goto err_vdd_arm;
-
- if (exynos_info->set_freq == NULL) {
- pr_err("%s: No set_freq function (ERR)\n", __func__);
- goto err_vdd_arm;
- }
-
- arm_regulator = regulator_get(NULL, "vdd_arm");
- if (IS_ERR(arm_regulator)) {
- pr_err("%s: failed to get resource vdd_arm\n", __func__);
- goto err_vdd_arm;
- }
-
- register_pm_notifier(&exynos_cpufreq_nb);
-
- if (cpufreq_register_driver(&exynos_driver)) {
- pr_err("%s: failed to register cpufreq driver\n", __func__);
- goto err_cpufreq;
- }
-
- return 0;
-err_cpufreq:
- unregister_pm_notifier(&exynos_cpufreq_nb);
-
- if (!IS_ERR(arm_regulator))
- regulator_put(arm_regulator);
-err_vdd_arm:
- kfree(exynos_info);
- pr_debug("%s: failed initialization\n", __func__);
- return -EINVAL;
-}
-late_initcall(exynos_cpufreq_init);