1 files changed, 48 insertions, 98 deletions

diff --git a/drivers/macintosh/windfarm_max6690_sensor.c b/drivers/macintosh/windfarm_max6690_sensor.c
index e207a90d6b2..87e439b1031 100644
--- a/drivers/macintosh/windfarm_max6690_sensor.c
+++ b/drivers/macintosh/windfarm_max6690_sensor.c
@@ -16,7 +16,7 @@
 
 #include "windfarm.h"
 
-#define VERSION "0.2"
+#define VERSION "1.0"
 
 /* This currently only exports the external temperature sensor,
    since that's all the control loops need. */
@@ -26,34 +26,22 @@
 #define MAX6690_EXTERNAL_TEMP	1
 
 struct wf_6690_sensor {
-	struct i2c_client	i2c;
+	struct i2c_client	*i2c;
 	struct wf_sensor	sens;
 };
 
 #define wf_to_6690(x)	container_of((x), struct wf_6690_sensor, sens)
-#define i2c_to_6690(x)	container_of((x), struct wf_6690_sensor, i2c)
-
-static int wf_max6690_attach(struct i2c_adapter *adapter);
-static int wf_max6690_detach(struct i2c_client *client);
-
-static struct i2c_driver wf_max6690_driver = {
-	.driver = {
-		.name		= "wf_max6690",
-	},
-	.attach_adapter	= wf_max6690_attach,
-	.detach_client	= wf_max6690_detach,
-};
 
 static int wf_max6690_get(struct wf_sensor *sr, s32 *value)
 {
 	struct wf_6690_sensor *max = wf_to_6690(sr);
 	s32 data;
 
-	if (max->i2c.adapter == NULL)
+	if (max->i2c == NULL)
 		return -ENODEV;
 
 	/* chip gets initialized by firmware */
-	data = i2c_smbus_read_byte_data(&max->i2c, MAX6690_EXTERNAL_TEMP);
+	data = i2c_smbus_read_byte_data(max->i2c, MAX6690_EXTERNAL_TEMP);
 	if (data < 0)
 		return data;
 	*value = data << 16;
@@ -64,10 +52,6 @@ static void wf_max6690_release(struct wf_sensor *sr)
 {
 	struct wf_6690_sensor *max = wf_to_6690(sr);
 
-	if (max->i2c.adapter) {
-		i2c_detach_client(&max->i2c);
-		max->i2c.adapter = NULL;
-	}
 	kfree(max);
 }
 
@@ -77,110 +61,76 @@ static struct wf_sensor_ops wf_max6690_ops = {
 	.owner		= THIS_MODULE,
 };
 
-static void wf_max6690_create(struct i2c_adapter *adapter, u8 addr,
-			      const char *loc)
+static int wf_max6690_probe(struct i2c_client *client,
+			    const struct i2c_device_id *id)
 {
+	const char *name, *loc;
 	struct wf_6690_sensor *max;
-	char *name;
+	int rc;
 
-	max = kzalloc(sizeof(struct wf_6690_sensor), GFP_KERNEL);
-	if (max == NULL) {
-		printk(KERN_ERR "windfarm: Couldn't create MAX6690 sensor %s: "
-		       "no memory\n", loc);
-		return;
+	loc = of_get_property(client->dev.of_node, "hwsensor-location", NULL);
+	if (!loc) {
+		dev_warn(&client->dev, "Missing hwsensor-location property!\n");
+		return -ENXIO;
 	}
 
-	if (!strcmp(loc, "BACKSIDE"))
+	/*
+	 * We only expose the external temperature register for
+	 * now as this is all we need for our control loops
+	 */
+	if (!strcmp(loc, "BACKSIDE") || !strcmp(loc, "SYS CTRLR AMBIENT"))
 		name = "backside-temp";
 	else if (!strcmp(loc, "NB Ambient"))
 		name = "north-bridge-temp";
 	else if (!strcmp(loc, "GPU Ambient"))
 		name = "gpu-temp";
 	else
-		goto fail;
+		return -ENXIO;
 
-	max->sens.ops = &wf_max6690_ops;
-	max->sens.name = name;
-	max->i2c.addr = addr >> 1;
-	max->i2c.adapter = adapter;
-	max->i2c.driver = &wf_max6690_driver;
-	strncpy(max->i2c.name, name, I2C_NAME_SIZE-1);
-
-	if (i2c_attach_client(&max->i2c)) {
-		printk(KERN_ERR "windfarm: failed to attach MAX6690 sensor\n");
-		goto fail;
-	}
-
-	if (wf_register_sensor(&max->sens)) {
-		i2c_detach_client(&max->i2c);
-		goto fail;
+	max = kzalloc(sizeof(struct wf_6690_sensor), GFP_KERNEL);
+	if (max == NULL) {
+		printk(KERN_ERR "windfarm: Couldn't create MAX6690 sensor: "
+		       "no memory\n");
+		return -ENOMEM;
 	}
 
-	return;
-
- fail:
-	kfree(max);
-}
-
-static int wf_max6690_attach(struct i2c_adapter *adapter)
-{
-	struct device_node *busnode, *dev = NULL;
-	struct pmac_i2c_bus *bus;
-	const char *loc;
-
-	bus = pmac_i2c_adapter_to_bus(adapter);
-	if (bus == NULL)
-		return -ENODEV;
-	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 (!of_device_is_compatible(dev, "max6690"))
-			continue;
-		addr = pmac_i2c_get_dev_addr(dev);
-		loc = of_get_property(dev, "hwsensor-location", NULL);
-		if (loc == NULL || addr == 0)
-			continue;
-		printk("found max6690, loc=%s addr=0x%02x\n", loc, addr);
-		wf_max6690_create(adapter, addr, loc);
-	}
+	max->i2c = client;
+	max->sens.name = name;
+	max->sens.ops = &wf_max6690_ops;
+	i2c_set_clientdata(client, max);
 
-	return 0;
+	rc = wf_register_sensor(&max->sens);
+	if (rc)
+		kfree(max);
+	return rc;
 }
 
-static int wf_max6690_detach(struct i2c_client *client)
+static int wf_max6690_remove(struct i2c_client *client)
 {
-	struct wf_6690_sensor *max = i2c_to_6690(client);
+	struct wf_6690_sensor *max = i2c_get_clientdata(client);
 
-	max->i2c.adapter = NULL;
+	max->i2c = NULL;
 	wf_unregister_sensor(&max->sens);
 
 	return 0;
 }
 
-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);
-}
+static const struct i2c_device_id wf_max6690_id[] = {
+	{ "MAC,max6690", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wf_max6690_id);
 
-static void __exit wf_max6690_sensor_exit(void)
-{
-	i2c_del_driver(&wf_max6690_driver);
-}
+static struct i2c_driver wf_max6690_driver = {
+	.driver = {
+		.name		= "wf_max6690",
+	},
+	.probe		= wf_max6690_probe,
+	.remove		= wf_max6690_remove,
+	.id_table	= wf_max6690_id,
+};
 
-module_init(wf_max6690_sensor_init);
-module_exit(wf_max6690_sensor_exit);
+module_i2c_driver(wf_max6690_driver);
 
 MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
 MODULE_DESCRIPTION("MAX6690 sensor objects for PowerMac thermal control");