acpihpet(4): disable/reenable acpihpet_delay() during suspend/resume

We can't use the HPET to delay(9) after we halt it during suspend.
Disable acpihpet_delay() before we halt the HPET and reenable it after
we restart the HPET during resume.

ok mlarkin@

diff --git a/sys/dev/acpi/acpihpet.c b/sys/dev/acpi/acpihpet.c
index 7b7898f..50be09a 100644 (file)
--- a/sys/dev/acpi/acpihpet.c
+++ b/sys/dev/acpi/acpihpet.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: acpihpet.c,v 1.29 2022/09/12 10:58:05 cheloha Exp $ */
+/* $OpenBSD: acpihpet.c,v 1.30 2022/11/08 14:54:47 cheloha Exp $ */
 /*
  * Copyright (c) 2005 Thorsten Lockert <tholo@sigmasoft.com>
  *
@@ -109,6 +109,8 @@ acpihpet_activate(struct device *self, int act)
 
        switch (act) {
        case DVACT_SUSPEND:
+               delay_fini(acpihpet_delay);
+
                /* stop, then save */
                bus_space_write_4(sc->sc_iot, sc->sc_ioh,
                    HPET_CONFIGURATION, sc->sc_conf);
@@ -169,6 +171,8 @@ acpihpet_activate(struct device *self, int act)
                    HPET_TIMER2_COMPARE, sc->sc_save.timers[2].compare);
                bus_space_write_4(sc->sc_iot, sc->sc_ioh,
                    HPET_CONFIGURATION, sc->sc_conf | 1);
+
+               delay_init(acpihpet_delay, 2000);
                break;
        }