From c6d3f6fa1b0b984991d6e2a261c7dd7f2685c7bd Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 16 Jul 2008 19:30:15 +0200 Subject: [PATCH] hwmon: (max1619) Convert to a new-style i2c driver The new-style max1619 driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare Cc: Alexey Fisher --- drivers/hwmon/max1619.c | 101 +++++++++++++++++----------------------- 1 file changed, 44 insertions(+), 57 deletions(-) diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c index 7e7267a0454..1ab1cacad59 100644 --- a/drivers/hwmon/max1619.c +++ b/drivers/hwmon/max1619.c @@ -79,23 +79,34 @@ I2C_CLIENT_INSMOD_1(max1619); * Functions declaration */ -static int max1619_attach_adapter(struct i2c_adapter *adapter); -static int max1619_detect(struct i2c_adapter *adapter, int address, - int kind); +static int max1619_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int max1619_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info); static void max1619_init_client(struct i2c_client *client); -static int max1619_detach_client(struct i2c_client *client); +static int max1619_remove(struct i2c_client *client); static struct max1619_data *max1619_update_device(struct device *dev); /* * Driver data (common to all clients) */ +static const struct i2c_device_id max1619_id[] = { + { "max1619", max1619 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max1619_id); + static struct i2c_driver max1619_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = "max1619", }, - .attach_adapter = max1619_attach_adapter, - .detach_client = max1619_detach_client, + .probe = max1619_probe, + .remove = max1619_remove, + .id_table = max1619_id, + .detect = max1619_detect, + .address_data = &addr_data, }; /* @@ -103,7 +114,6 @@ static struct i2c_driver max1619_driver = { */ struct max1619_data { - struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ @@ -208,41 +218,15 @@ static const struct attribute_group max1619_group = { * Real code */ -static int max1619_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_probe(adapter, &addr_data, max1619_detect); -} - -/* - * The following function does more than just detection. If detection - * succeeds, it also registers the new chip. - */ -static int max1619_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int max1619_detect(struct i2c_client *new_client, int kind, + struct i2c_board_info *info) { - struct i2c_client *new_client; - struct max1619_data *data; - int err = 0; - const char *name = ""; + struct i2c_adapter *adapter = new_client->adapter; u8 reg_config=0, reg_convrate=0, reg_status=0; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - /* The common I2C client data is placed right before the - MAX1619-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &max1619_driver; - new_client->flags = 0; + return -ENODEV; /* * Now we do the remaining detection. A negative kind means that @@ -265,8 +249,8 @@ static int max1619_detect(struct i2c_adapter *adapter, int address, int kind) || reg_convrate > 0x07 || (reg_status & 0x61 ) !=0x00) { dev_dbg(&adapter->dev, "MAX1619 detection failed at 0x%02x.\n", - address); - goto exit_free; + new_client->addr); + return -ENODEV; } } @@ -285,28 +269,37 @@ static int max1619_detect(struct i2c_adapter *adapter, int address, int kind) dev_info(&adapter->dev, "Unsupported chip (man_id=0x%02X, " "chip_id=0x%02X).\n", man_id, chip_id); - goto exit_free; + return -ENODEV; } } - if (kind == max1619) - name = "max1619"; + strlcpy(info->type, "max1619", I2C_NAME_SIZE); + + return 0; +} + +static int max1619_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) +{ + struct max1619_data *data; + int err; + + data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; + } - /* We can fill in the remaining client fields */ - strlcpy(new_client->name, name, I2C_NAME_SIZE); + i2c_set_clientdata(new_client, data); data->valid = 0; mutex_init(&data->update_lock); - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) - goto exit_free; - /* Initialize the MAX1619 chip */ max1619_init_client(new_client); /* Register sysfs hooks */ if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group))) - goto exit_detach; + goto exit_free; data->hwmon_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->hwmon_dev)) { @@ -318,8 +311,6 @@ static int max1619_detect(struct i2c_adapter *adapter, int address, int kind) exit_remove_files: sysfs_remove_group(&new_client->dev.kobj, &max1619_group); -exit_detach: - i2c_detach_client(new_client); exit_free: kfree(data); exit: @@ -341,17 +332,13 @@ static void max1619_init_client(struct i2c_client *client) config & 0xBF); /* run */ } -static int max1619_detach_client(struct i2c_client *client) +static int max1619_remove(struct i2c_client *client) { struct max1619_data *data = i2c_get_clientdata(client); - int err; hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &max1619_group); - if ((err = i2c_detach_client(client))) - return err; - kfree(data); return 0; } -- 2.41.1