From c2df1591df3ea83b4a5890a1131dd821ca07e761 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 16 Jul 2008 19:30:12 +0200 Subject: [PATCH] hwmon: (fscher) Convert to a new-style i2c driver The new-style fscher driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare Cc: Reinhard Nissl --- drivers/hwmon/fscher.c | 93 +++++++++++++++++++----------------------- 1 file changed, 42 insertions(+), 51 deletions(-) diff --git a/drivers/hwmon/fscher.c b/drivers/hwmon/fscher.c index ed26b66e0831..12c70e402cb2 100644 --- a/drivers/hwmon/fscher.c +++ b/drivers/hwmon/fscher.c @@ -106,9 +106,11 @@ I2C_CLIENT_INSMOD_1(fscher); * Functions declaration */ -static int fscher_attach_adapter(struct i2c_adapter *adapter); -static int fscher_detect(struct i2c_adapter *adapter, int address, int kind); -static int fscher_detach_client(struct i2c_client *client); +static int fscher_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int fscher_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info); +static int fscher_remove(struct i2c_client *client); static struct fscher_data *fscher_update_device(struct device *dev); static void fscher_init_client(struct i2c_client *client); @@ -119,12 +121,21 @@ static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value); * Driver data (common to all clients) */ +static const struct i2c_device_id fscher_id[] = { + { "fscher", fscher }, + { } +}; + static struct i2c_driver fscher_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = "fscher", }, - .attach_adapter = fscher_attach_adapter, - .detach_client = fscher_detach_client, + .probe = fscher_probe, + .remove = fscher_remove, + .id_table = fscher_id, + .detect = fscher_detect, + .address_data = &addr_data, }; /* @@ -132,7 +143,6 @@ static struct i2c_driver fscher_driver = { */ struct fscher_data { - struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ @@ -283,38 +293,14 @@ static const struct attribute_group fscher_group = { * Real code */ -static int fscher_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_probe(adapter, &addr_data, fscher_detect); -} - -static int fscher_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int fscher_detect(struct i2c_client *new_client, int kind, + struct i2c_board_info *info) { - struct i2c_client *new_client; - struct fscher_data *data; - int err = 0; + struct i2c_adapter *adapter = new_client->adapter; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_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 i2c_smbus_read_byte_data. */ - if (!(data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - /* The common I2C client data is placed right before the - * Hermes-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &fscher_driver; - new_client->flags = 0; + return -ENODEV; /* Do the remaining detection unless force or force_fscher parameter */ if (kind < 0) { @@ -324,24 +310,35 @@ static int fscher_detect(struct i2c_adapter *adapter, int address, int kind) FSCHER_REG_IDENT_1) != 0x45) /* 'E' */ || (i2c_smbus_read_byte_data(new_client, FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */ - goto exit_free; + return -ENODEV; + } + + strlcpy(info->type, "fscher", I2C_NAME_SIZE); + + return 0; +} + +static int fscher_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) +{ + struct fscher_data *data; + int err; + + data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; } - /* Fill in the remaining client fields and put it into the - * global list */ - strlcpy(new_client->name, "fscher", 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; - fscher_init_client(new_client); /* Register sysfs hooks */ if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group))) - goto exit_detach; + goto exit_free; data->hwmon_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->hwmon_dev)) { @@ -353,25 +350,19 @@ static int fscher_detect(struct i2c_adapter *adapter, int address, int kind) exit_remove_files: sysfs_remove_group(&new_client->dev.kobj, &fscher_group); -exit_detach: - i2c_detach_client(new_client); exit_free: kfree(data); exit: return err; } -static int fscher_detach_client(struct i2c_client *client) +static int fscher_remove(struct i2c_client *client) { struct fscher_data *data = i2c_get_clientdata(client); - int err; hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &fscher_group); - if ((err = i2c_detach_client(client))) - return err; - kfree(data); return 0; } -- 2.30.2