Disable display backlight on Apple Silicon laptops when suspending.

ok kettenis@ patrick@

diff --git a/sys/dev/fdt/gpiobl.c b/sys/dev/fdt/gpiobl.c
index 96c169a..41a613f 100644 (file)
--- a/sys/dev/fdt/gpiobl.c
+++ b/sys/dev/fdt/gpiobl.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: gpiobl.c,v 1.2 2022/11/09 22:56:44 tobhe Exp $        */
+/*     $OpenBSD: gpiobl.c,v 1.3 2023/01/03 10:59:00 tobhe Exp $        */
 /*
  * Copyright (c) 2022 Tobias Heider <tobhe@openbsd.org>
  *
@@ -44,9 +44,11 @@ struct gpiobl_softc *sc_gpiobl;
 
 int    gpiobl_match(struct device *, void *, void *);
 void   gpiobl_attach(struct device *, struct device *, void *);
+int    gpiobl_activate(struct device *, int);
 
 const struct cfattach gpiobl_ca = {
-       sizeof(struct gpiobl_softc), gpiobl_match, gpiobl_attach
+       sizeof(struct gpiobl_softc), gpiobl_match, gpiobl_attach, NULL,
+       gpiobl_activate
 };
 
 struct cfdriver gpiobl_cd = {
@@ -88,6 +90,23 @@ gpiobl_attach(struct device *parent, struct device *self, void *aux)
        printf("\n");
 }
 
+int
+gpiobl_activate(struct device *self, int act)
+{
+       struct gpiobl_softc *sc = (struct gpiobl_softc *)self;
+
+       switch (act) {
+       case DVACT_QUIESCE:
+               gpio_controller_set_pin(&sc->sc_gpio[0], 0);
+               break;
+       case DVACT_WAKEUP:
+               gpio_controller_set_pin(&sc->sc_gpio[0], sc->sc_on);
+               break;
+       }
+
+       return 0;
+}
+
 void
 gpiobl_set(u_int on)
 {