diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2013-12-19 03:27:11 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2013-12-19 03:27:11 +0000 |
| commit | 71eccd9f92c0fb46676163b1201acf9c8f29bccc (patch) | |
| tree | 44d559d5c36d406ce81a2ad94f3ff82de37b4d94 /sys/dev | |
| parent | 3ba536fc469b7116f928ed7be0885cb7b30b9b7c (diff) | |
be more careful during suspend/resume cycles, as roughly detailed in the
spec. More might be required.
ok jordan matthew mlarkin
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/acpi/acpihpet.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/sys/dev/acpi/acpihpet.c b/sys/dev/acpi/acpihpet.c index 697a5e704f3..6b3ec2d4fe9 100644 --- a/sys/dev/acpi/acpihpet.c +++ b/sys/dev/acpi/acpihpet.c @@ -1,4 +1,4 @@ -/* $OpenBSD: acpihpet.c,v 1.14 2012/08/16 18:41:17 tedu Exp $ */ +/* $OpenBSD: acpihpet.c,v 1.15 2013/12/19 03:27:10 deraadt Exp $ */ /* * Copyright (c) 2005 Thorsten Lockert <tholo@sigmasoft.com> * @@ -49,6 +49,7 @@ struct acpihpet_softc { bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; + u_int32_t sc_conf; }; struct cfattach acpihpet_ca = { @@ -69,9 +70,13 @@ acpihpet_activate(struct device *self, int act) struct acpihpet_softc *sc = (struct acpihpet_softc *) self; switch (act) { + case DVACT_SUSPEND: + bus_space_write_4(sc->sc_iot, sc->sc_ioh, + HPET_CONFIGURATION, sc->sc_conf); + break; case DVACT_RESUME: bus_space_write_4(sc->sc_iot, sc->sc_ioh, - HPET_CONFIGURATION, 1); + HPET_CONFIGURATION, sc->sc_conf | 1); break; } @@ -138,7 +143,10 @@ acpihpet_attach(struct device *parent, struct device *self, void *aux) } /* enable hpet */ - bus_space_write_4(sc->sc_iot, sc->sc_ioh, HPET_CONFIGURATION, 1); + sc->sc_conf = bus_space_read_4(sc->sc_iot, sc->sc_ioh, + HPET_CONFIGURATION) & ~1; + bus_space_write_4(sc->sc_iot, sc->sc_ioh, HPET_CONFIGURATION, + sc->sc_conf | 1); /* make sure hpet is working */ v1 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, HPET_MAIN_COUNTER); @@ -147,7 +155,7 @@ acpihpet_attach(struct device *parent, struct device *self, void *aux) if (v1 == v2) { printf(": counter not incrementing\n"); bus_space_write_4(sc->sc_iot, sc->sc_ioh, - HPET_CONFIGURATION, 0); + HPET_CONFIGURATION, sc->sc_conf); return; } @@ -156,7 +164,7 @@ acpihpet_attach(struct device *parent, struct device *self, void *aux) if (period == 0) { printf(": invalid period\n"); bus_space_write_4(sc->sc_iot, sc->sc_ioh, - HPET_CONFIGURATION, 0); + HPET_CONFIGURATION, sc->sc_conf); return; } freq = 1000000000000000ull / period; |