this patch add button status control to acpibtn(4) driver via sensor
framework.

% dmesg | grep acpibtn
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
% sysctl hw.sensors
hw.sensors.0=acpibtn0, button status, Off
hw.sensors.1=acpibtn1, button status, Off

please test, comment

Index: acpibtn.c
================================================== =================
RCS file: /cvs/src/sys/dev/acpi/acpibtn.c,v
retrieving revision 1.10
diff -u -p -u -r1.10 acpibtn.c
--- acpibtn.c 31 May 2006 10:01:56 -0000 1.10
+++ acpibtn.c 10 Oct 2006 09:44:59 -0000
@@ -34,6 +34,7 @@

int acpibtn_match(struct device *, void *, void *);
void acpibtn_attach(struct device *, struct device *, void *);
+void acpibtn_refresh(void *);
int acpibtn_notify(struct aml_node *, int, void *);

struct acpibtn_softc {
@@ -46,6 +47,8 @@ struct acpibtn_softc {
struct aml_node *sc_devnode;

int sc_btn_type;
+ int sc_flag;
+ struct sensor sc_sens;
#define ACPIBTN_LID 0
#define ACPIBTN_POWER 1
#define ACPIBTN_SLEEP 2
@@ -96,7 +99,27 @@ acpibtn_attach(struct device *parent, st

printf(": %s\n", sc->sc_devnode->parent->name);

- aml_register_notify(sc->sc_devnode->parent, aa->aaa_dev, acpibtn_notify, sc);
+ aml_register_notify(sc->sc_devnode->parent, aa->aaa_dev,
+ acpibtn_notify, sc);
+
+ memset(&sc->sc_sens, 0, sizeof(sc->sc_sens));
+ strlcpy(sc->sc_sens.device, DEVNAME(sc), sizeof(sc->sc_sens.device));
+ strlcpy(sc->sc_sens.desc, "button status",
+ sizeof(sc->sc_sens.desc));
+ sc->sc_sens.type = SENSOR_INDICATOR;
+ sensor_add(&sc->sc_sens);
+ sc->sc_sens.value = 0;
+
+ if (sensor_task_register(sc, acpibtn_refresh, 5))
+ printf(", unable to register update task\n");
+}
+
+void
+acpibtn_refresh(void *arg)
+{
+ struct acpibtn_softc *sc = arg;
+
+ sc->sc_sens.value = sc->sc_flag;
}

int
@@ -125,6 +148,11 @@ acpibtn_notify(struct aml_node *node, in

dnprintf(10, "acpibtn_notify: %.2x %s\n", notify_type,
sc->sc_devnode->parent->name);
+
+ if (sc->sc_flag == 0)
+ sc->sc_flag = 1;
+ else
+ sc->sc_flag = 0;

switch (sc->sc_btn_type) {
case ACPIBTN_LID: