1 files changed, 18 insertions, 7 deletions

diff --git a/drivers/macintosh/windfarm_max6690_sensor.c b/drivers/macintosh/windfarm_max6690_sensor.c
index 5b9ad6ca7cba..8e99d408fddd 100644
--- a/drivers/macintosh/windfarm_max6690_sensor.c
+++ b/drivers/macintosh/windfarm_max6690_sensor.c
@@ -17,7 +17,7 @@
 
 #include "windfarm.h"
 
-#define VERSION "0.1"
+#define VERSION "0.2"
 
 /* This currently only exports the external temperature sensor,
    since that's all the control loops need. */
@@ -81,7 +81,7 @@ static struct wf_sensor_ops wf_max6690_ops = {
 static void wf_max6690_create(struct i2c_adapter *adapter, u8 addr)
 {
         struct wf_6690_sensor *max;
-        char *name = "u4-temp";
+        char *name = "backside-temp";
 
         max = kzalloc(sizeof(struct wf_6690_sensor), GFP_KERNEL);
         if (max == NULL) {
@@ -118,7 +118,6 @@ static int wf_max6690_attach(struct i2c_adapter *adapter)
         struct device_node *busnode, *dev = NULL;
         struct pmac_i2c_bus *bus;
         const char *loc;
-        u32 *reg;
 
         bus = pmac_i2c_adapter_to_bus(adapter);
         if (bus == NULL)
@@ -126,16 +125,23 @@ static int wf_max6690_attach(struct i2c_adapter *adapter)
         busnode = pmac_i2c_get_bus_node(bus);
 
         while ((dev = of_get_next_child(busnode, dev)) != NULL) {
+                u8 addr;
+
+                /* We must re-match the adapter in order to properly check
+                 * the channel on multibus setups
+                 */
+                if (!pmac_i2c_match_adapter(dev, adapter))
+                        continue;
                 if (!device_is_compatible(dev, "max6690"))
                         continue;
+                addr = pmac_i2c_get_dev_addr(dev);
                 loc = get_property(dev, "hwsensor-location", NULL);
-                reg = (u32 *) get_property(dev, "reg", NULL);
-                if (!loc || !reg)
+                if (loc == NULL || addr == 0)
                         continue;
-                printk("found max6690, loc=%s reg=%x\n", loc, *reg);
+                printk("found max6690, loc=%s addr=0x%02x\n", loc, addr);
                 if (strcmp(loc, "BACKSIDE"))
                         continue;
-                wf_max6690_create(adapter, *reg);
+                wf_max6690_create(adapter, addr);
         }
 
         return 0;
@@ -153,6 +159,11 @@ static int wf_max6690_detach(struct i2c_client *client)
 
 static int __init wf_max6690_sensor_init(void)
 {
+        /* Don't register on old machines that use therm_pm72 for now */
+        if (machine_is_compatible("PowerMac7,2") ||
+            machine_is_compatible("PowerMac7,3") ||
+            machine_is_compatible("RackMac3,1"))
+                return -ENODEV;
         return i2c_add_driver(&wf_max6690_driver);
 }