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PM: Optional beeping during resume from suspend to RAM

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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>
This commit is contained in:
Nigel Cunningham
2007-07-19 01:47:41 -07:00
committed by Linus Torvalds
parent bd804eba1c
commit 5a60d6235c
4 changed files with 76 additions and 0 deletions
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23
kernel/power/main.c
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@ -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 */