powerpc/powermac: Make auto-loading of therm_pm72 possible
The therm_pm72 driver, used on the PowerMac G5 range, cannot be
auto-loaded, since the driver itself creates both the device node
and the driver instance.
Moving the device node creation to the platform setup code and
adding the necessary MODULE_DEVICE_TABLE() information allows the
driver to be automatically loaded by udev on any semi-modern
distribution.
It "fixes" a major source of problem on G5 machines where the
driver wasn't explicitely loaded by default, and the system
would automatically shutdown under load.
Tested on an Xserve G5.
Signed-off-by: Marc Zyngier <maz@misterjones.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
index 4454927..2e041fd 100644
--- a/drivers/macintosh/therm_pm72.c
+++ b/drivers/macintosh/therm_pm72.c
@@ -2213,6 +2213,9 @@
static int fcu_of_probe(struct platform_device* dev, const struct of_device_id *match)
{
state = state_detached;
+ of_dev = dev;
+
+ dev_info(&dev->dev, "PowerMac G5 Thermal control driver %s\n", VERSION);
/* Lookup the fans in the device tree */
fcu_lookup_fans(dev->dev.of_node);
@@ -2235,6 +2238,7 @@
},
{},
};
+MODULE_DEVICE_TABLE(of, fcu_match);
static struct of_platform_driver fcu_of_platform_driver =
{
@@ -2252,8 +2256,6 @@
*/
static int __init therm_pm72_init(void)
{
- struct device_node *np;
-
rackmac = of_machine_is_compatible("RackMac3,1");
if (!of_machine_is_compatible("PowerMac7,2") &&
@@ -2261,34 +2263,12 @@
!rackmac)
return -ENODEV;
- printk(KERN_INFO "PowerMac G5 Thermal control driver %s\n", VERSION);
-
- np = of_find_node_by_type(NULL, "fcu");
- if (np == NULL) {
- /* Some machines have strangely broken device-tree */
- np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
- if (np == NULL) {
- printk(KERN_ERR "Can't find FCU in device-tree !\n");
- return -ENODEV;
- }
- }
- of_dev = of_platform_device_create(np, "temperature", NULL);
- if (of_dev == NULL) {
- printk(KERN_ERR "Can't register FCU platform device !\n");
- return -ENODEV;
- }
-
- of_register_platform_driver(&fcu_of_platform_driver);
-
- return 0;
+ return of_register_platform_driver(&fcu_of_platform_driver);
}
static void __exit therm_pm72_exit(void)
{
of_unregister_platform_driver(&fcu_of_platform_driver);
-
- if (of_dev)
- of_device_unregister(of_dev);
}
module_init(therm_pm72_init);