hwmon: (lm95241) Convert to new-style i2c driver

The legacy i2c binding model is going away really soon now, so convert
the lm95241 driver to the new binding model or it will break.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Davide Rizzo <elpa.rizzo@gmail.com>

1 files changed, 47 insertions, 65 deletions

diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
index 091d95f38aaa..e34f9e402a2c 100644
--- a/drivers/hwmon/lm95241.c
+++ b/drivers/hwmon/lm95241.c
@@ -87,25 +87,11 @@ I2C_CLIENT_INSMOD_1(lm95241);
     (val_h)) * 1000 + (val_l) * 1000 / 256)
 
 /* Functions declaration */
-static int lm95241_attach_adapter(struct i2c_adapter *adapter);
-static int lm95241_detect(struct i2c_adapter *adapter, int address,
-                          int kind);
 static void lm95241_init_client(struct i2c_client *client);
-static int lm95241_detach_client(struct i2c_client *client);
 static struct lm95241_data *lm95241_update_device(struct device *dev);
 
-/* Driver data (common to all clients) */
-static struct i2c_driver lm95241_driver = {
-        .driver = {
-                .name   = "lm95241",
-        },
-        .attach_adapter = lm95241_attach_adapter,
-        .detach_client  = lm95241_detach_client,
-};
-
 /* Client data (each client gets its own) */
 struct lm95241_data {
-        struct i2c_client client;
         struct device *hwmon_dev;
         struct mutex update_lock;
         unsigned long last_updated, rate; /* in jiffies */
@@ -323,42 +309,16 @@ static const struct attribute_group lm95241_group = {
         .attrs = lm95241_attributes,
 };
 
-/* Init/exit code */
-static int lm95241_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm95241_detect(struct i2c_client *new_client, int kind,
+                          struct i2c_board_info *info)
 {
-        if (!(adapter->class & I2C_CLASS_HWMON))
-                return 0;
-        return i2c_probe(adapter, &addr_data, lm95241_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
-{
-        struct i2c_client *new_client;
-        struct lm95241_data *data;
-        int err = 0;
+        struct i2c_adapter *adapter = new_client->adapter;
+        int address = new_client->addr;
         const char *name = "";
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-                goto exit;
-
-        data = kzalloc(sizeof(struct lm95241_data), GFP_KERNEL);
-        if (!data) {
-                err = -ENOMEM;
-                goto exit;
-        }
-
-        /* The common I2C client data is placed right before the
-           LM95241-specific data. */
-        new_client = &data->client;
-        i2c_set_clientdata(new_client, data);
-        new_client->addr = address;
-        new_client->adapter = adapter;
-        new_client->driver = &lm95241_driver;
-        new_client->flags = 0;
+                return -ENODEV;
 
         /*
          * Now we do the remaining detection. A negative kind means that
@@ -378,7 +338,7 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
                         dev_dbg(&adapter->dev,
                                 "LM95241 detection failed at 0x%02x.\n",
                                 address);
-                        goto exit_free;
+                        return -ENODEV;
                 }
         }
 
@@ -392,23 +352,32 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
 
                         if (kind <= 0) { /* identification failed */
                                 dev_info(&adapter->dev, "Unsupported chip\n");
-                                goto exit_free;
+                                return -ENODEV;
                         }
                 }
         }
 
+        /* Fill the i2c board info */
         if (kind == lm95241)
                 name = "lm95241";
+        strlcpy(info->type, name, I2C_NAME_SIZE);
+        return 0;
+}
 
-        /* We can fill in the remaining client fields */
-        strlcpy(new_client->name, name, I2C_NAME_SIZE);
-        data->valid = 0;
-        mutex_init(&data->update_lock);
+static int lm95241_probe(struct i2c_client *new_client,
+                         const struct i2c_device_id *id)
+{
+        struct lm95241_data *data;
+        int err;
 
-        /* Tell the I2C layer a new client has arrived */
-        err = i2c_attach_client(new_client);
-        if (err)
-                goto exit_free;
+        data = kzalloc(sizeof(struct lm95241_data), GFP_KERNEL);
+        if (!data) {
+                err = -ENOMEM;
+                goto exit;
+        }
+
+        i2c_set_clientdata(new_client, data);
+        mutex_init(&data->update_lock);
 
         /* Initialize the LM95241 chip */
         lm95241_init_client(new_client);
@@ -416,7 +385,7 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
         /* Register sysfs hooks */
         err = sysfs_create_group(&new_client->dev.kobj, &lm95241_group);
         if (err)
-                goto exit_detach;
+                goto exit_free;
 
         data->hwmon_dev = hwmon_device_register(&new_client->dev);
         if (IS_ERR(data->hwmon_dev)) {
@@ -428,8 +397,6 @@ static int lm95241_detect(struct i2c_adapter *adapter, int address, int kind)
 
 exit_remove_files:
         sysfs_remove_group(&new_client->dev.kobj, &lm95241_group);
-exit_detach:
-        i2c_detach_client(new_client);
 exit_free:
         kfree(data);
 exit:
@@ -456,18 +423,14 @@ static void lm95241_init_client(struct i2c_client *client)
                                   data->model);
 }
 
-static int lm95241_detach_client(struct i2c_client *client)
+static int lm95241_remove(struct i2c_client *client)
 {
         struct lm95241_data *data = i2c_get_clientdata(client);
-        int err;
 
         hwmon_device_unregister(data->hwmon_dev);
         sysfs_remove_group(&client->dev.kobj, &lm95241_group);
 
-        err = i2c_detach_client(client);
-        if (err)
-                return err;
-
+        i2c_set_clientdata(client, NULL);
         kfree(data);
         return 0;
 }
@@ -509,6 +472,25 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
         return data;
 }
 
+/* Driver data (common to all clients) */
+static const struct i2c_device_id lm95241_id[] = {
+        { "lm95241", lm95241 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, lm95241_id);
+
+static struct i2c_driver lm95241_driver = {
+        .class          = I2C_CLASS_HWMON,
+        .driver = {
+                .name   = "lm95241",
+        },
+        .probe          = lm95241_probe,
+        .remove         = lm95241_remove,
+        .id_table       = lm95241_id,
+        .detect         = lm95241_detect,
+        .address_data   = &addr_data,
+};
+
 static int __init sensors_lm95241_init(void)
 {
         return i2c_add_driver(&lm95241_driver);