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rk30: cpufreq: support sys_state

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黄涛
2013-07-03 10:11:09 +08:00
parent 95ebffb4bf
commit c83124f13a
1 changed files with 30 additions and 1 deletions
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31
arch/arm/mach-rk30/cpufreq.c
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@@ -28,6 +28,7 @@
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/string.h>
#include <linux/earlysuspend.h>
#include <asm/unistd.h>
@@ -127,6 +128,32 @@ static const struct cpufreq_frequency_table temp_limits_high[] = {
extern int rk30_tsadc_get_temp(unsigned int chn);
static char sys_state;
static ssize_t sys_state_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
char state;
if (count < 1)
return count;
if (copy_from_user(&state, buffer, 1)) {
return -EFAULT;
}
sys_state = state;
return count;
}
static const struct file_operations sys_state_fops = {
.owner = THIS_MODULE,
.write = sys_state_write,
};
static struct miscdevice sys_state_dev = {
.fops = &sys_state_fops,
.name = "sys_state",
.minor = MISC_DYNAMIC_MINOR,
};
static void rk30_cpufreq_temp_limit_work_func(struct work_struct *work)
{
struct cpufreq_policy *policy;
@@ -142,7 +169,7 @@ static void rk30_cpufreq_temp_limit_work_func(struct work_struct *work)
FREQ_PRINTK_LOG("cpu_thermal(%d)\n", temp);
gpu_irqs[1] = kstat_irqs(IRQ_GPU_GP);
if (clk_get_rate(gpu_clk) > GPU_MAX_RATE) {
if (sys_state == '1' || clk_get_rate(gpu_clk) > GPU_MAX_RATE) {
delay = HZ / 20;
if ((gpu_irqs[1] - gpu_irqs[0]) < 3) {
limits_table = temp_limits_high;
@@ -279,6 +306,7 @@ static int rk30_cpu_init(struct cpufreq_policy *policy)
freq_wq = create_singlethread_workqueue("rk30_cpufreqd");
#ifdef CONFIG_RK30_CPU_FREQ_LIMIT_BY_TEMP
misc_register(&sys_state_dev);
if (rk30_cpufreq_is_ondemand_policy(policy)) {
queue_delayed_work(freq_wq, &rk30_cpufreq_temp_limit_work, 0*HZ);
}
@@ -321,6 +349,7 @@ static int rk30_cpu_exit(struct cpufreq_policy *policy)
cpufreq_unregister_notifier(&notifier_policy_block, CPUFREQ_POLICY_NOTIFIER);
if (freq_wq)
cancel_delayed_work(&rk30_cpufreq_temp_limit_work);
misc_deregister(&sys_state_dev);
#endif
if (freq_wq) {
flush_workqueue(freq_wq);