If no AC line devices are found, go ahead and notify devd that the system

is on AC power (i.e. not a laptop).  This allows power_profile to run once
for desktop systems as well, for instance, to set C3 or CPU frequency.

MFC after:	2 weeks

1 files changed, 18 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_acad.c b/sys/dev/acpica/acpi_acad.c
index 413a558..02da0e8 100644
--- a/sys/dev/acpica/acpi_acad.c
+++ b/sys/dev/acpica/acpi_acad.c
@@ -66,6 +66,7 @@ static int	acpi_acad_attach(device_t);
 static int	acpi_acad_ioctl(u_long, caddr_t, void *);
 static int	acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
 static void	acpi_acad_init_acline(void *arg);
+static void	acpi_acad_ac_only(void *arg);
 
 static device_method_t acpi_acad_methods[] = {
     /* Device interface */
@@ -87,6 +88,8 @@ MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
 
 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
 
+SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
+
 static void
 acpi_acad_get_status(void *context)
 {
@@ -245,6 +248,21 @@ acpi_acad_init_acline(void *arg)
 }
 
 /*
+ * If no AC line devices detected after boot, create an "online" event
+ * so that userland code can adjust power settings accordingly.  The default
+ * power profile is "performance" so we don't need to repeat that here.
+ */
+static void
+acpi_acad_ac_only(void __unused *arg)
+{
+
+    if (devclass_get_count(acpi_acad_devclass) > 0)
+	return;
+
+    acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
+}
+
+/*
  * Public interfaces.
  */
 int