diff options
author | Jon Medhurst <tixy@linaro.org> | 2013-05-20 10:24:37 +0100 |
---|---|---|
committer | Jon Medhurst <tixy@linaro.org> | 2013-05-20 10:24:37 +0100 |
commit | af9137a6124f0148f72d605b03b4a37da672373d (patch) | |
tree | 3c70186293657fc0cc14b3995c8985c7d5bf897e /drivers/cpufreq/cpufreq_stats.c | |
parent | 35b0f142acc57b3f0df06e70f003eb1840135401 (diff) | |
parent | faf864ee5412631f70109b7601b33f40d99e4c88 (diff) |
Merge branch 'IKS-rebase' into integration-linaro-vexpresstracking-integration-linaro-vexpress-ll-20130520.1
Diffstat (limited to 'drivers/cpufreq/cpufreq_stats.c')
-rw-r--r-- | drivers/cpufreq/cpufreq_stats.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index 6c287ae7bbba..7dc9c4efbcfb 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -21,6 +21,7 @@ #include <linux/spinlock.h> #include <linux/notifier.h> #include <asm/cputime.h> +#include <asm/bL_switcher.h> static spinlock_t cpufreq_stats_lock; @@ -403,7 +404,7 @@ static struct notifier_block notifier_trans_block = { .notifier_call = cpufreq_stat_notifier_trans }; -static int __init cpufreq_stats_init(void) +static int cpufreq_stats_setup(void) { int ret; unsigned int cpu; @@ -431,7 +432,8 @@ static int __init cpufreq_stats_init(void) return 0; } -static void __exit cpufreq_stats_exit(void) + +static void cpufreq_stats_cleanup(void) { unsigned int cpu; @@ -446,6 +448,49 @@ static void __exit cpufreq_stats_exit(void) } } +static int cpufreq_stats_switcher_notifier(struct notifier_block *nfb, + unsigned long action, void *_arg) +{ + switch (action) { + case BL_NOTIFY_PRE_ENABLE: + case BL_NOTIFY_PRE_DISABLE: + cpufreq_stats_cleanup(); + break; + + case BL_NOTIFY_POST_ENABLE: + case BL_NOTIFY_POST_DISABLE: + cpufreq_stats_setup(); + break; + + default: + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static struct notifier_block switcher_notifier = { + .notifier_call = cpufreq_stats_switcher_notifier, +}; + +static int __init cpufreq_stats_init(void) +{ + int ret; + spin_lock_init(&cpufreq_stats_lock); + + ret = cpufreq_stats_setup(); + if (!ret) + bL_switcher_register_notifier(&switcher_notifier); + + return ret; +} + +static void __exit cpufreq_stats_exit(void) +{ + bL_switcher_unregister_notifier(&switcher_notifier); + cpufreq_stats_cleanup(); +} + MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>"); MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats " "through sysfs filesystem"); |