diff options
| author |   Nigel Cunningham <nigel@nigel.suspend2.net> | 2007-07-19 01:47:41 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 10:04:43 -0700 |
| commit | 5a60d6235c8352ade8f2699e72fcdfe853730456 (patch) | |
| tree | cafab638df562b912e9e2a653e5c7238816d9706 /kernel/power | |
| parent | PM: Introduce pm_power_off_prepare (diff) | |
| download | linux-dev-5a60d6235c8352ade8f2699e72fcdfe853730456.tar.xz linux-dev-5a60d6235c8352ade8f2699e72fcdfe853730456.zip | |
PM: Optional beeping during resume from suspend to RAM
Add a feature allowing the user to make the system beep during a resume from
suspend to RAM, on x86_64 and i386.
This is useful for the users with broken resume from RAM, so that they can
verify if the control reaches the kernel after a wake-up event.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/main.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 32147b57c3bf..c74a56436d8b 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -332,6 +332,27 @@ static ssize_t state_store(struct kset *kset, const char *buf, size_t n) power_attr(state); +unsigned long s2ram_beep = 0; + +static ssize_t s2ram_beep_show(struct kset *kset, char *buf) +{ + return sprintf(buf, "%d\n", s2ram_beep); +} + +static ssize_t +s2ram_beep_store(struct kset *kset, const char *buf, size_t n) +{ + int val; + + if (sscanf(buf, "%d", &val) > 0) { + s2ram_beep = val; + return n; + } + return -EINVAL; +} + +power_attr(s2ram_beep); + #ifdef CONFIG_PM_TRACE int pm_trace_enabled; @@ -357,11 +378,13 @@ power_attr(pm_trace); static struct attribute * g[] = { &state_attr.attr, &pm_trace_attr.attr, + &s2ram_beep_attr.attr, NULL, }; #else static struct attribute * g[] = { &state_attr.attr, + &s2ram_beep_attr.attr, NULL, }; #endif /* CONFIG_PM_TRACE */ |