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diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -195,6 +195,7 @@
static enum power_stype acpi_sstate_to_stype(int sstate);
static int acpi_sname_to_sstate(const char *sname);
static const char *acpi_sstate_to_sname(int sstate);
+static int acpi_suspend_state_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_stype_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
@@ -616,6 +617,11 @@
&sc->acpi_lid_switch_stype, 0, acpi_stype_sysctl, "A",
"Lid ACPI sleep state. Set to s2idle or s2mem if you want to suspend "
"your laptop when close the lid.");
+ SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
+ OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE,
+ NULL, 0, acpi_suspend_state_sysctl, "A",
+ "Current ACPI suspend state. This sysctl is deprecated; you probably "
+ "want to use kern.power.suspend instead.");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "standby_state",
CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE,
@@ -4352,6 +4358,32 @@
return (error);
}
+static int
+acpi_suspend_state_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ char name[10];
+ int err;
+ struct acpi_softc *sc = oidp->oid_arg1;
+ enum power_stype new_stype;
+ enum power_stype old_stype = power_suspend_stype;
+ int old_sstate = acpi_stype_to_sstate(sc, old_stype);
+ int new_sstate;
+
+ strlcpy(name, acpi_sstate_to_sname(old_sstate), sizeof(name));
+ err = sysctl_handle_string(oidp, name, sizeof(name), req);
+ if (err != 0 || req->newptr == NULL)
+ return (err);
+
+ new_sstate = acpi_sname_to_sstate(name);
+ if (new_sstate < 0)
+ return (EINVAL);
+ new_stype = acpi_sstate_to_stype(new_sstate);
+ if (acpi_supported_stypes[new_stype] == false)
+ return (EOPNOTSUPP);
+ if (new_stype != old_stype)
+ power_suspend_stype = new_stype;
+ return (err);
+}
static int
acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)

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