return val;
 }
 
-static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name)
+static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name,
+                               unsigned int i2c_class)
 {
        int rc;
 
        strcpy(chan->adapter.name, name);
        chan->adapter.owner = THIS_MODULE;
        chan->adapter.id = I2C_HW_B_NVIDIA;
+       chan->adapter.class = i2c_class;
        chan->adapter.algo_data = &chan->algo;
        chan->adapter.dev.parent = &chan->par->pci_dev->dev;
        chan->algo.setsda = nvidia_gpio_setsda;
        par->chan[2].par = par;
 
        par->chan[0].ddc_base = 0x36;
-       nvidia_setup_i2c_bus(&par->chan[0], "nvidia #0");
+       nvidia_setup_i2c_bus(&par->chan[0], "nvidia #0", I2C_CLASS_HWMON);
 
        par->chan[1].ddc_base = 0x3e;
-       nvidia_setup_i2c_bus(&par->chan[1], "nvidia #1");
+       nvidia_setup_i2c_bus(&par->chan[1], "nvidia #1", 0);
 
        par->chan[2].ddc_base = 0x50;
-       nvidia_setup_i2c_bus(&par->chan[2], "nvidia #2");
+       nvidia_setup_i2c_bus(&par->chan[2], "nvidia #2", 0);
 }
 
 void nvidia_delete_i2c_busses(struct nvidia_par *par)
 
        return val;
 }
 
-static int riva_setup_i2c_bus(struct riva_i2c_chan *chan, const char *name)
+static int riva_setup_i2c_bus(struct riva_i2c_chan *chan, const char *name,
+                             unsigned int i2c_class)
 {
        int rc;
 
        strcpy(chan->adapter.name, name);
        chan->adapter.owner             = THIS_MODULE;
        chan->adapter.id                = I2C_HW_B_RIVA;
+       chan->adapter.class             = i2c_class;
        chan->adapter.algo_data         = &chan->algo;
        chan->adapter.dev.parent        = &chan->par->pdev->dev;
        chan->algo.setsda               = riva_gpio_setsda;
        par->chan[0].ddc_base = 0x3e;
        par->chan[1].ddc_base = 0x36;
        par->chan[2].ddc_base = 0x50;
-       riva_setup_i2c_bus(&par->chan[0], "BUS1");
-       riva_setup_i2c_bus(&par->chan[1], "BUS2");
-       riva_setup_i2c_bus(&par->chan[2], "BUS3");
+       riva_setup_i2c_bus(&par->chan[0], "BUS1", 0);
+       riva_setup_i2c_bus(&par->chan[1], "BUS2", I2C_CLASS_HWMON);
+       riva_setup_i2c_bus(&par->chan[2], "BUS3", 0);
 }
 
 void riva_delete_i2c_busses(struct riva_par *par)