From: Huisung Kang <hs1218.kang@xxxxxxxxxxx>
When system reboot, the CPUFREQ level should be 800MHz to prevent
system lockup.
Signed-off-by: Huisung Kang <hs1218.kang@xxxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
drivers/cpufreq/s5pv210-cpufreq.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index 78c88a0..082d044 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -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>
@@ -599,6 +600,19 @@ 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,
@@ -616,6 +630,11 @@ 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");
@@ -632,6 +651,7 @@ 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);
}
--
1.7.1
--
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