1 files changed, 23 insertions, 9 deletions

diff --git a/drivers/macintosh/windfarm_lm75_sensor.c b/drivers/macintosh/windfarm_lm75_sensor.c
index 906d3ecae6e6..423bfa2432c0 100644
--- a/drivers/macintosh/windfarm_lm75_sensor.c
+++ b/drivers/macintosh/windfarm_lm75_sensor.c
@@ -25,7 +25,7 @@
 
 #include "windfarm.h"
 
-#define VERSION "0.1"
+#define VERSION "0.2"
 
 #undef DEBUG
 
@@ -113,6 +113,7 @@ static struct wf_lm75_sensor *wf_lm75_create(struct i2c_adapter *adapter,
                                              const char *loc)
 {
         struct wf_lm75_sensor *lm;
+        int rc;
 
         DBG("wf_lm75: creating  %s device at address 0x%02x\n",
             ds1775 ? "ds1775" : "lm75", addr);
@@ -139,9 +140,11 @@ static struct wf_lm75_sensor *wf_lm75_create(struct i2c_adapter *adapter,
         lm->i2c.driver = &wf_lm75_driver;
         strncpy(lm->i2c.name, lm->sens.name, I2C_NAME_SIZE-1);
 
-        if (i2c_attach_client(&lm->i2c)) {
-                printk(KERN_ERR "windfarm: failed to attach %s %s to i2c\n",
-                       ds1775 ? "ds1775" : "lm75", lm->i2c.name);
+        rc = i2c_attach_client(&lm->i2c);
+        if (rc) {
+                printk(KERN_ERR "windfarm: failed to attach %s %s to i2c,"
+                       " err %d\n", ds1775 ? "ds1775" : "lm75",
+                       lm->i2c.name, rc);
                 goto fail;
         }
 
@@ -175,16 +178,22 @@ static int wf_lm75_attach(struct i2c_adapter *adapter)
              (dev = of_get_next_child(busnode, dev)) != NULL;) {
                 const char *loc =
                         get_property(dev, "hwsensor-location", NULL);
-                u32 *reg = (u32 *)get_property(dev, "reg", NULL);
-                DBG(" dev: %s... (loc: %p, reg: %p)\n", dev->name, loc, reg);
-                if (loc == NULL || reg == 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;
+                addr = pmac_i2c_get_dev_addr(dev);
+                if (loc == NULL || addr == 0)
                         continue;
                 /* real lm75 */
                 if (device_is_compatible(dev, "lm75"))
-                        wf_lm75_create(adapter, *reg, 0, loc);
+                        wf_lm75_create(adapter, addr, 0, loc);
                 /* ds1775 (compatible, better resolution */
                 else if (device_is_compatible(dev, "ds1775"))
-                        wf_lm75_create(adapter, *reg, 1, loc);
+                        wf_lm75_create(adapter, addr, 1, loc);
         }
         return 0;
 }
@@ -206,6 +215,11 @@ static int wf_lm75_detach(struct i2c_client *client)
 
 static int __init wf_lm75_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_lm75_driver);
 }