diff options
Diffstat (limited to 'kernel/power/main.c')
| -rw-r--r-- | kernel/power/main.c | 160 |
1 files changed, 141 insertions, 19 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 1c12581f1c6..428f8a034e9 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -269,8 +269,7 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr, return (s - buf); } -static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, - const char *buf, size_t n) +static suspend_state_t decode_state(const char *buf, size_t n) { #ifdef CONFIG_SUSPEND suspend_state_t state = PM_SUSPEND_STANDBY; @@ -278,27 +277,48 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, #endif char *p; int len; - int error = -EINVAL; p = memchr(buf, '\n', n); len = p ? p - buf : n; - /* First, check if we are requested to hibernate */ - if (len == 4 && !strncmp(buf, "disk", len)) { - error = hibernate(); - goto Exit; - } + /* Check hibernation first. */ + if (len == 4 && !strncmp(buf, "disk", len)) + return PM_SUSPEND_MAX; #ifdef CONFIG_SUSPEND - for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) { - if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) { - error = pm_suspend(state); - break; - } - } + for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) + if (*s && len == strlen(*s) && !strncmp(buf, *s, len)) + return state; #endif - Exit: + return PM_SUSPEND_ON; +} + +static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t n) +{ + suspend_state_t state; + int error; + + error = pm_autosleep_lock(); + if (error) + return error; + + if (pm_autosleep_state() > PM_SUSPEND_ON) { + error = -EBUSY; + goto out; + } + + state = decode_state(buf, n); + if (state < PM_SUSPEND_MAX) + error = pm_suspend(state); + else if (state == PM_SUSPEND_MAX) + error = hibernate(); + else + error = -EINVAL; + + out: + pm_autosleep_unlock(); return error ? error : n; } @@ -339,7 +359,8 @@ static ssize_t wakeup_count_show(struct kobject *kobj, { unsigned int val; - return pm_get_wakeup_count(&val) ? sprintf(buf, "%u\n", val) : -EINTR; + return pm_get_wakeup_count(&val, true) ? + sprintf(buf, "%u\n", val) : -EINTR; } static ssize_t wakeup_count_store(struct kobject *kobj, @@ -347,15 +368,106 @@ static ssize_t wakeup_count_store(struct kobject *kobj, const char *buf, size_t n) { unsigned int val; + int error; + + error = pm_autosleep_lock(); + if (error) + return error; + + if (pm_autosleep_state() > PM_SUSPEND_ON) { + error = -EBUSY; + goto out; + } + error = -EINVAL; if (sscanf(buf, "%u", &val) == 1) { if (pm_save_wakeup_count(val)) - return n; + error = n; } - return -EINVAL; + + out: + pm_autosleep_unlock(); + return error; } power_attr(wakeup_count); + +#ifdef CONFIG_PM_AUTOSLEEP +static ssize_t autosleep_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + suspend_state_t state = pm_autosleep_state(); + + if (state == PM_SUSPEND_ON) + return sprintf(buf, "off\n"); + +#ifdef CONFIG_SUSPEND + if (state < PM_SUSPEND_MAX) + return sprintf(buf, "%s\n", valid_state(state) ? + pm_states[state] : "error"); +#endif +#ifdef CONFIG_HIBERNATION + return sprintf(buf, "disk\n"); +#else + return sprintf(buf, "error"); +#endif +} + +static ssize_t autosleep_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t n) +{ + suspend_state_t state = decode_state(buf, n); + int error; + + if (state == PM_SUSPEND_ON + && strcmp(buf, "off") && strcmp(buf, "off\n")) + return -EINVAL; + + error = pm_autosleep_set_state(state); + return error ? error : n; +} + +power_attr(autosleep); +#endif /* CONFIG_PM_AUTOSLEEP */ + +#ifdef CONFIG_PM_WAKELOCKS +static ssize_t wake_lock_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + return pm_show_wakelocks(buf, true); +} + +static ssize_t wake_lock_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t n) +{ + int error = pm_wake_lock(buf); + return error ? error : n; +} + +power_attr(wake_lock); + +static ssize_t wake_unlock_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + return pm_show_wakelocks(buf, false); +} + +static ssize_t wake_unlock_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t n) +{ + int error = pm_wake_unlock(buf); + return error ? error : n; +} + +power_attr(wake_unlock); + +#endif /* CONFIG_PM_WAKELOCKS */ #endif /* CONFIG_PM_SLEEP */ #ifdef CONFIG_PM_TRACE @@ -409,6 +521,13 @@ static struct attribute * g[] = { #ifdef CONFIG_PM_SLEEP &pm_async_attr.attr, &wakeup_count_attr.attr, +#ifdef CONFIG_PM_AUTOSLEEP + &autosleep_attr.attr, +#endif +#ifdef CONFIG_PM_WAKELOCKS + &wake_lock_attr.attr, + &wake_unlock_attr.attr, +#endif #ifdef CONFIG_PM_DEBUG &pm_test_attr.attr, #endif @@ -444,7 +563,10 @@ static int __init pm_init(void) power_kobj = kobject_create_and_add("power", NULL); if (!power_kobj) return -ENOMEM; - return sysfs_create_group(power_kobj, &attr_group); + error = sysfs_create_group(power_kobj, &attr_group); + if (error) + return error; + return pm_autosleep_init(); } core_initcall(pm_init); |