diff options
| author | Huisung Kang <hs1218.kang@samsung.com> | 2011-06-24 09:04:18 +0200 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-07-14 00:29:59 +0200 |
| commit | fe7f1bcbff917f22e121d4b2c045fb1de80cc450 (patch) | |
| tree | f702fdf7eda800f91f1c36097f694759d6ae80d1 | |
| parent | [CPUFREQ] S5PV210: Adjust udelay prior to voltage scaling down (diff) | |
| download | linux-fe7f1bcbff917f22e121d4b2c045fb1de80cc450.tar.xz linux-fe7f1bcbff917f22e121d4b2c045fb1de80cc450.zip | |
[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>
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 155242cfc714..7c4bb070b904 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 @@ 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); } |