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>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 9deb274841f1..d5aceb7fb125 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -506,6 +506,15 @@ static int __init pmac_declare_of_platform_devices(void)
                 of_platform_device_create(np, "smu", NULL);
                 of_node_put(np);
         }
+        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) {
+                of_platform_device_create(np, "temperature", NULL);
+                of_node_put(np);
+        }
 
         return 0;
 }