Add suspend/resume support to control the power domain.

ok patrick@

diff --git a/sys/arch/arm64/dev/aplsart.c b/sys/arch/arm64/dev/aplsart.c
index 15e0726..40ae2e3 100644 (file)
--- a/sys/arch/arm64/dev/aplsart.c
+++ b/sys/arch/arm64/dev/aplsart.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: aplsart.c,v 1.2 2022/06/13 12:40:30 kettenis Exp $    */
+/*     $OpenBSD: aplsart.c,v 1.3 2022/11/10 14:15:15 kettenis Exp $    */
 /*
  * Copyright (c) 2022 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -28,6 +28,7 @@
 
 #include <dev/ofw/openfirm.h>
 #include <dev/ofw/fdt.h>
+#include <dev/ofw/ofw_power.h>
 
 #define SART2_CONFIG(idx)      (0x0000 + 4 * (idx))
 #define  SART2_CONFIG_FLAGS_MASK       0xff000000
@@ -53,15 +54,18 @@ struct aplsart_softc {
        struct device           sc_dev;
        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
+       int                     sc_node;
        uint32_t                sc_phandle;
        int                     sc_version;
 };
 
 int    aplsart_match(struct device *, void *, void *);
 void   aplsart_attach(struct device *, struct device *, void *);
+int    aplsart_activate(struct device *, int);
 
 const struct cfattach aplsart_ca = {
-       sizeof (struct aplsart_softc), aplsart_match, aplsart_attach
+       sizeof (struct aplsart_softc), aplsart_match, aplsart_attach, NULL,
+       aplsart_activate
 };
 
 struct cfdriver aplsart_cd = {
@@ -95,16 +99,36 @@ aplsart_attach(struct device *parent, struct device *self, void *aux)
                return;
        }
 
+       sc->sc_node = faa->fa_node;
        sc->sc_phandle = OF_getpropint(faa->fa_node, "phandle", 0);
 
-       if (OF_is_compatible(faa->fa_node, "apple,t8103-sart"))
+       if (OF_is_compatible(sc->sc_node, "apple,t8103-sart"))
                sc->sc_version = 2;
-       if (OF_is_compatible(faa->fa_node, "apple,t6000-sart"))
+       if (OF_is_compatible(sc->sc_node, "apple,t6000-sart"))
                sc->sc_version = 3;
 
+       power_domain_enable_all(sc->sc_node);
+
        printf("\n");
 }
 
+int
+aplsart_activate(struct device *self, int act)
+{
+       struct aplsart_softc *sc = (struct aplsart_softc *)self;
+
+       switch (act) {
+       case DVACT_POWERDOWN:
+               power_domain_disable_all(sc->sc_node);
+               break;
+       case DVACT_RESUME:
+               power_domain_enable_all(sc->sc_node);
+               break;
+       }
+
+       return 0;
+}
+
 int
 aplsart2_map(struct aplsart_softc *sc, bus_addr_t addr, bus_size_t size)
 {