[CPUFREQ] S5PV210: Add reboot notifier to prevent system hang
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>
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index 155242c..7c4bb070 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>
@@ -590,6 +591,19 @@
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 @@
.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 @@
}
register_pm_notifier(&s5pv210_cpufreq_notifier);
+ register_reboot_notifier(&s5pv210_cpufreq_reboot_notifier);
return cpufreq_register_driver(&s5pv210_driver);
}