static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
I2C_CLIENT_END };
-/* Insmod parameters */
-I2C_CLIENT_INSMOD_1(ads7828);
-
-/* Other module parameters */
+/* Module parameters */
static int se_input = 1; /* Default is SE, 0 == diff */
static int int_vref = 1; /* Default is internal ref ON */
static int vref_mv = ADS7828_INT_VREF_MV; /* set if vref != 2.5V */
/* Each client has this additional data */
struct ads7828_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock; /* mutex protect updates */
char valid; /* !=0 if following fields are valid */
};
/* Function declaration - necessary due to function dependencies */
-static int ads7828_detect(struct i2c_adapter *adapter, int address, int kind);
+static int ads7828_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+static int ads7828_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
/* The ADS7828 returns the 12-bit sample in two bytes,
these are read as a word then byte-swapped */
.attrs = ads7828_attributes,
};
-static int ads7828_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, ads7828_detect);
-}
-
-static int ads7828_detach_client(struct i2c_client *client)
+static int ads7828_remove(struct i2c_client *client)
{
struct ads7828_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ads7828_group);
- i2c_detach_client(client);
kfree(i2c_get_clientdata(client));
return 0;
}
+static const struct i2c_device_id ads7828_id[] = {
+ { "ads7828", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ads7828_id);
+
/* This is the driver that will be inserted */
static struct i2c_driver ads7828_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "ads7828",
},
- .attach_adapter = ads7828_attach_adapter,
- .detach_client = ads7828_detach_client,
+ .probe = ads7828_probe,
+ .remove = ads7828_remove,
+ .id_table = ads7828_id,
+ .detect = ads7828_detect,
+ .address_list = normal_i2c,
};
-/* This function is called by i2c_probe */
-static int ads7828_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int ads7828_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct ads7828_data *data;
- int err = 0;
- const char *name = "";
+ struct i2c_adapter *adapter = client->adapter;
+ int ch;
/* Check we have a valid client */
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_WORD_DATA))
- goto exit;
-
- /* OK. For now, we presume we have a valid client. We now create the
- client structure, even though we cannot fill it completely yet.
- But it allows us to access ads7828_read_value. */
- data = kzalloc(sizeof(struct ads7828_data), GFP_KERNEL);
- if (!data) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &ads7828_driver;
+ return -ENODEV;
/* Now, we do the remaining detection. There is no identification
dedicated register so attempt to sanity check using knowledge of
- Read from the 8 channel addresses
- Check the top 4 bits of each result are not set (12 data bits)
*/
- if (kind < 0) {
- int ch;
- for (ch = 0; ch < ADS7828_NCH; ch++) {
- u16 in_data;
- u8 cmd = channel_cmd_byte(ch);
- in_data = ads7828_read_value(client, cmd);
- if (in_data & 0xF000) {
- printk(KERN_DEBUG
- "%s : Doesn't look like an ads7828 device\n",
- __func__);
- goto exit_free;
- }
+ for (ch = 0; ch < ADS7828_NCH; ch++) {
+ u16 in_data;
+ u8 cmd = channel_cmd_byte(ch);
+ in_data = ads7828_read_value(client, cmd);
+ if (in_data & 0xF000) {
+ pr_debug("%s : Doesn't look like an ads7828 device\n",
+ __func__);
+ return -ENODEV;
}
}
- /* Determine the chip type - only one kind supported! */
- if (kind <= 0)
- kind = ads7828;
+ strlcpy(info->type, "ads7828", I2C_NAME_SIZE);
- if (kind == ads7828)
- name = "ads7828";
+ return 0;
+}
- /* Fill in the remaining client fields, put it into the global list */
- strlcpy(client->name, name, I2C_NAME_SIZE);
+static int ads7828_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ads7828_data *data;
+ int err;
- mutex_init(&data->update_lock);
+ data = kzalloc(sizeof(struct ads7828_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
- /* Tell the I2C layer a new client has arrived */
- err = i2c_attach_client(client);
- if (err)
- goto exit_free;
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &ads7828_group);
if (err)
- goto exit_detach;
+ goto exit_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
exit_remove:
sysfs_remove_group(&client->dev.kobj, &ads7828_group);
-exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff