Set CPU speed to 100% in acpi_throttle attach. This is needed for some

systems that boot with this value at the lowest setting.  Change the
default boot config back to "leave frequency as BIOS set it".  Also, fix
buglet where acpi_throttle wouldn't be used if p4tcc was present but
disabled by the user.

MFC after:	1 week

1 files changed, 10 insertions, 1 deletions

diff --git a/sys/dev/acpica/acpi_throttle.c b/sys/dev/acpica/acpi_throttle.c
index 073b060..105ac1d 100644
--- a/sys/dev/acpica/acpi_throttle.c
+++ b/sys/dev/acpica/acpi_throttle.c
@@ -175,7 +175,8 @@ acpi_throttle_probe(device_t dev)
 	 * Since p4tcc uses the same mechanism (but internal to the CPU),
 	 * we disable acpi_throttle when p4tcc is also present.
 	 */
-	if (device_find_child(device_get_parent(dev), "p4tcc", -1))
+	if (device_find_child(device_get_parent(dev), "p4tcc", -1) &&
+	    !resource_disabled("p4tcc", 0))
 		return (ENXIO);
 
 	device_set_desc(dev, "ACPI CPU Throttling");
@@ -186,6 +187,7 @@ static int
 acpi_throttle_attach(device_t dev)
 {
 	struct acpi_throttle_softc *sc;
+	struct cf_setting set;
 	ACPI_BUFFER buf;
 	ACPI_OBJECT *obj;
 	ACPI_STATUS status;
@@ -217,6 +219,13 @@ acpi_throttle_attach(device_t dev)
 	if (error)
 		return (error);
 
+	/*
+	 * Set our initial frequency to the highest since some systems
+	 * seem to boot with this at the lowest setting.
+	 */
+	set.freq = 10000;
+	acpi_thr_set(dev, &set);
+
 	/* Everything went ok, register with cpufreq(4). */
 	cpufreq_register(dev);
 	return (0);