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[CPUFREQ] S5PV210: Add reboot notifier to prevent system hang

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When system reboot, the CPUFREQ level should be 800MHz to prevent
system lockup.

Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Huisung Kang 2011-06-24 16:04:18 +09:00 committed by Dave Jones
parent 74df8e69e9
commit fe7f1bcbff
1 changed files with 19 additions and 0 deletions
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19
drivers/cpufreq/s5pv210-cpufreq.c
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@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/cpufreq.h>
#include <linux/reboot.h>
#include <linux/regulator/consumer.h>
#include <linux/suspend.h>
@ -590,6 +591,19 @@ static int s5pv210_cpufreq_notifier_event(struct notifier_block *this,
return NOTIFY_DONE;
}
static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
int ret;
ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ,
DISABLE_FURTHER_CPUFREQ);
if (ret < 0)
return NOTIFY_BAD;
return NOTIFY_DONE;
}
static struct cpufreq_driver s5pv210_driver = {
.flags = CPUFREQ_STICKY,
.verify = s5pv210_verify_speed,
@ -607,6 +621,10 @@ static struct notifier_block s5pv210_cpufreq_notifier = {
.notifier_call = s5pv210_cpufreq_notifier_event,
};
static struct notifier_block s5pv210_cpufreq_reboot_notifier = {
.notifier_call = s5pv210_cpufreq_reboot_notifier_event,
};
static int __init s5pv210_cpufreq_init(void)
{
arm_regulator = regulator_get(NULL, "vddarm");
@ -623,6 +641,7 @@ static int __init s5pv210_cpufreq_init(void)
}
register_pm_notifier(&s5pv210_cpufreq_notifier);
register_reboot_notifier(&s5pv210_cpufreq_reboot_notifier);
return cpufreq_register_driver(&s5pv210_driver);
}