diff options
Diffstat (limited to 'drivers/i2c/chips')
| -rw-r--r-- | drivers/i2c/chips/eeprom.c | 92 | ||||
| -rw-r--r-- | drivers/i2c/chips/max6875.c | 120 | ||||
| -rw-r--r-- | drivers/i2c/chips/pca9539.c | 109 | ||||
| -rw-r--r-- | drivers/i2c/chips/pcf8574.c | 108 | ||||
| -rw-r--r-- | drivers/i2c/chips/pcf8575.c | 96 | ||||
| -rw-r--r-- | drivers/i2c/chips/pcf8591.c | 94 |
6 files changed, 248 insertions, 371 deletions
diff --git a/drivers/i2c/chips/eeprom.c b/drivers/i2c/chips/eeprom.c index 373ea8d8fe8f..2c27193aeaa0 100644 --- a/drivers/i2c/chips/eeprom.c +++ b/drivers/i2c/chips/eeprom.c @@ -47,7 +47,6 @@ enum eeprom_nature { /* Each client has this additional data */ struct eeprom_data { - struct i2c_client client; struct mutex update_lock; u8 valid; /* bitfield, bit!=0 if slice is valid */ unsigned long last_updated[8]; /* In jiffies, 8 slices */ @@ -56,19 +55,6 @@ struct eeprom_data { }; -static int eeprom_attach_adapter(struct i2c_adapter *adapter); -static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind); -static int eeprom_detach_client(struct i2c_client *client); - -/* This is the driver that will be inserted */ -static struct i2c_driver eeprom_driver = { - .driver = { - .name = "eeprom", - }, - .attach_adapter = eeprom_attach_adapter, - .detach_client = eeprom_detach_client, -}; - static void eeprom_update_client(struct i2c_client *client, u8 slice) { struct eeprom_data *data = i2c_get_clientdata(client); @@ -148,25 +134,17 @@ static struct bin_attribute eeprom_attr = { .read = eeprom_read, }; -static int eeprom_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & (I2C_CLASS_DDC | I2C_CLASS_SPD))) - return 0; - return i2c_probe(adapter, &addr_data, eeprom_detect); -} - -/* This function is called by i2c_probe */ -static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int eeprom_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - struct i2c_client *client; - struct eeprom_data *data; - int err = 0; + struct i2c_adapter *adapter = client->adapter; /* EDID EEPROMs are often 24C00 EEPROMs, which answer to all addresses 0x50-0x57, but we only care about 0x50. So decline attaching to addresses >= 0x51 on DDC buses */ - if (!(adapter->class & I2C_CLASS_SPD) && address >= 0x51) - goto exit; + if (!(adapter->class & I2C_CLASS_SPD) && client->addr >= 0x51) + return -ENODEV; /* There are four ways we can read the EEPROM data: (1) I2C block reads (faster, but unsupported by most adapters) @@ -177,32 +155,33 @@ static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind) because all known adapters support one of the first two. */ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_WORD_DATA) && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK)) - goto exit; + return -ENODEV; + + strlcpy(info->type, "eeprom", I2C_NAME_SIZE); + + return 0; +} + +static int eeprom_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + struct eeprom_data *data; + int err; if (!(data = kzalloc(sizeof(struct eeprom_data), GFP_KERNEL))) { err = -ENOMEM; goto exit; } - client = &data->client; memset(data->data, 0xff, EEPROM_SIZE); i2c_set_clientdata(client, data); - client->addr = address; - client->adapter = adapter; - client->driver = &eeprom_driver; - - /* Fill in the remaining client fields */ - strlcpy(client->name, "eeprom", I2C_NAME_SIZE); mutex_init(&data->update_lock); data->nature = UNKNOWN; - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto exit_kfree; - /* Detect the Vaio nature of EEPROMs. We use the "PCG-" or "VGN-" prefix as the signature. */ - if (address == 0x57 + if (client->addr == 0x57 && i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) { char name[4]; @@ -221,33 +200,42 @@ static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind) /* create the sysfs eeprom file */ err = sysfs_create_bin_file(&client->dev.kobj, &eeprom_attr); if (err) - goto exit_detach; + goto exit_kfree; return 0; -exit_detach: - i2c_detach_client(client); exit_kfree: kfree(data); exit: return err; } -static int eeprom_detach_client(struct i2c_client *client) +static int eeprom_remove(struct i2c_client *client) { - int err; - sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr); - - err = i2c_detach_client(client); - if (err) - return err; - kfree(i2c_get_clientdata(client)); return 0; } +static const struct i2c_device_id eeprom_id[] = { + { "eeprom", 0 }, + { } +}; + +static struct i2c_driver eeprom_driver = { + .driver = { + .name = "eeprom", + }, + .probe = eeprom_probe, + .remove = eeprom_remove, + .id_table = eeprom_id, + + .class = I2C_CLASS_DDC | I2C_CLASS_SPD, + .detect = eeprom_detect, + .address_data = &addr_data, +}; + static int __init eeprom_init(void) { return i2c_add_driver(&eeprom_driver); diff --git a/drivers/i2c/chips/max6875.c b/drivers/i2c/chips/max6875.c index 5a0285d8b6f9..033d9d81ec8a 100644 --- a/drivers/i2c/chips/max6875.c +++ b/drivers/i2c/chips/max6875.c @@ -53,7 +53,7 @@ I2C_CLIENT_INSMOD_1(max6875); /* Each client has this additional data */ struct max6875_data { - struct i2c_client client; + struct i2c_client *fake_client; struct mutex update_lock; u32 valid; @@ -61,19 +61,6 @@ struct max6875_data { unsigned long last_updated[USER_EEPROM_SLICES]; }; -static int max6875_attach_adapter(struct i2c_adapter *adapter); -static int max6875_detect(struct i2c_adapter *adapter, int address, int kind); -static int max6875_detach_client(struct i2c_client *client); - -/* This is the driver that will be inserted */ -static struct i2c_driver max6875_driver = { - .driver = { - .name = "max6875", - }, - .attach_adapter = max6875_attach_adapter, - .detach_client = max6875_detach_client, -}; - static void max6875_update_slice(struct i2c_client *client, int slice) { struct max6875_data *data = i2c_get_clientdata(client); @@ -159,96 +146,87 @@ static struct bin_attribute user_eeprom_attr = { .read = max6875_read, }; -static int max6875_attach_adapter(struct i2c_adapter *adapter) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int max6875_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - return i2c_probe(adapter, &addr_data, max6875_detect); -} - -/* This function is called by i2c_probe */ -static int max6875_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *real_client; - struct i2c_client *fake_client; - struct max6875_data *data; - int err; + struct i2c_adapter *adapter = client->adapter; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA | I2C_FUNC_SMBUS_READ_BYTE)) - return 0; + return -ENODEV; /* Only check even addresses */ - if (address & 1) - return 0; + if (client->addr & 1) + return -ENODEV; + + strlcpy(info->type, "max6875", I2C_NAME_SIZE); + + return 0; +} + +static int max6875_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max6875_data *data; + int err; if (!(data = kzalloc(sizeof(struct max6875_data), GFP_KERNEL))) return -ENOMEM; /* A fake client is created on the odd address */ - if (!(fake_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) { + data->fake_client = i2c_new_dummy(client->adapter, client->addr + 1); + if (!data->fake_client) { err = -ENOMEM; - goto exit_kfree1; + goto exit_kfree; } /* Init real i2c_client */ - real_client = &data->client; - i2c_set_clientdata(real_client, data); - real_client->addr = address; - real_client->adapter = adapter; - real_client->driver = &max6875_driver; - strlcpy(real_client->name, "max6875", I2C_NAME_SIZE); + i2c_set_clientdata(client, data); mutex_init(&data->update_lock); - /* Init fake client data */ - i2c_set_clientdata(fake_client, NULL); - fake_client->addr = address | 1; - fake_client->adapter = adapter; - fake_client->driver = &max6875_driver; - strlcpy(fake_client->name, "max6875 subclient", I2C_NAME_SIZE); - - if ((err = i2c_attach_client(real_client)) != 0) - goto exit_kfree2; - - if ((err = i2c_attach_client(fake_client)) != 0) - goto exit_detach1; - - err = sysfs_create_bin_file(&real_client->dev.kobj, &user_eeprom_attr); + err = sysfs_create_bin_file(&client->dev.kobj, &user_eeprom_attr); if (err) - goto exit_detach2; + goto exit_remove_fake; return 0; -exit_detach2: - i2c_detach_client(fake_client); -exit_detach1: - i2c_detach_client(real_client); -exit_kfree2: - kfree(fake_client); -exit_kfree1: +exit_remove_fake: + i2c_unregister_device(data->fake_client); +exit_kfree: kfree(data); return err; } -/* Will be called for both the real client and the fake client */ -static int max6875_detach_client(struct i2c_client *client) +static int max6875_remove(struct i2c_client *client) { - int err; struct max6875_data *data = i2c_get_clientdata(client); - /* data is NULL for the fake client */ - if (data) - sysfs_remove_bin_file(&client->dev.kobj, &user_eeprom_attr); + i2c_unregister_device(data->fake_client); - err = i2c_detach_client(client); - if (err) - return err; + sysfs_remove_bin_file(&client->dev.kobj, &user_eeprom_attr); + kfree(data); - if (data) /* real client */ - kfree(data); - else /* fake client */ - kfree(client); return 0; } +static const struct i2c_device_id max6875_id[] = { + { "max6875", 0 }, + { } +}; + +static struct i2c_driver max6875_driver = { + .driver = { + .name = "max6875", + }, + .probe = max6875_probe, + .remove = max6875_remove, + .id_table = max6875_id, + + .detect = max6875_detect, + .address_data = &addr_data, +}; + static int __init max6875_init(void) { return i2c_add_driver(&max6875_driver); diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c index 58ab7f26be26..270de4e56a81 100644 --- a/drivers/i2c/chips/pca9539.c +++ b/drivers/i2c/chips/pca9539.c @@ -14,8 +14,8 @@ #include <linux/i2c.h> #include <linux/hwmon-sysfs.h> -/* Addresses to scan */ -static unsigned short normal_i2c[] = {0x74, 0x75, 0x76, 0x77, I2C_CLIENT_END}; +/* Addresses to scan: none, device is not autodetected */ +static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD_1(pca9539); @@ -32,23 +32,6 @@ enum pca9539_cmd PCA9539_DIRECTION_1 = 7, }; -static int pca9539_attach_adapter(struct i2c_adapter *adapter); -static int pca9539_detect(struct i2c_adapter *adapter, int address, int kind); -static int pca9539_detach_client(struct i2c_client *client); - -/* This is the driver that will be inserted */ -static struct i2c_driver pca9539_driver = { - .driver = { - .name = "pca9539", - }, - .attach_adapter = pca9539_attach_adapter, - .detach_client = pca9539_detach_client, -}; - -struct pca9539_data { - struct i2c_client client; -}; - /* following are the sysfs callback functions */ static ssize_t pca9539_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -105,77 +88,51 @@ static struct attribute_group pca9539_defattr_group = { .attrs = pca9539_attributes, }; -static int pca9539_attach_adapter(struct i2c_adapter *adapter) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int pca9539_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - return i2c_probe(adapter, &addr_data, pca9539_detect); -} - -/* This function is called by i2c_probe */ -static int pca9539_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *client; - struct pca9539_data *data; - int err = 0; + struct i2c_adapter *adapter = 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. */ - if (!(data = kzalloc(sizeof(struct pca9539_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - client = &data->client; - i2c_set_clientdata(client, data); - client->addr = address; - client->adapter = adapter; - client->driver = &pca9539_driver; - - if (kind < 0) { - /* Detection: the pca9539 only has 8 registers (0-7). - A read of 7 should succeed, but a read of 8 should fail. */ - if ((i2c_smbus_read_byte_data(client, 7) < 0) || - (i2c_smbus_read_byte_data(client, 8) >= 0)) - goto exit_kfree; - } - - strlcpy(client->name, "pca9539", I2C_NAME_SIZE); - - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto exit_kfree; + return -ENODEV; - /* Register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, - &pca9539_defattr_group); - if (err) - goto exit_detach; + strlcpy(info->type, "pca9539", I2C_NAME_SIZE); return 0; - -exit_detach: - i2c_detach_client(client); -exit_kfree: - kfree(data); -exit: - return err; } -static int pca9539_detach_client(struct i2c_client *client) +static int pca9539_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - int err; + /* Register sysfs hooks */ + return sysfs_create_group(&client->dev.kobj, + &pca9539_defattr_group); +} +static int pca9539_remove(struct i2c_client *client) +{ sysfs_remove_group(&client->dev.kobj, &pca9539_defattr_group); - - if ((err = i2c_detach_client(client))) - return err; - - kfree(i2c_get_clientdata(client)); return 0; } +static const struct i2c_device_id pca9539_id[] = { + { "pca9539", 0 }, + { } +}; + +static struct i2c_driver pca9539_driver = { + .driver = { + .name = "pca9539", + }, + .probe = pca9539_probe, + .remove = pca9539_remove, + .id_table = pca9539_id, + + .detect = pca9539_detect, + .address_data = &addr_data, +}; + static int __init pca9539_init(void) { return i2c_add_driver(&pca9539_driver); diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c index 1b3db2b3ada9..6ec309894c88 100644 --- a/drivers/i2c/chips/pcf8574.c +++ b/drivers/i2c/chips/pcf8574.c @@ -38,37 +38,19 @@ #include <linux/slab.h> #include <linux/i2c.h> -/* Addresses to scan */ -static const unsigned short normal_i2c[] = { - 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, - 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, - I2C_CLIENT_END -}; +/* Addresses to scan: none, device can't be detected */ +static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD_2(pcf8574, pcf8574a); /* Each client has this additional data */ struct pcf8574_data { - struct i2c_client client; - int write; /* Remember last written value */ }; -static int pcf8574_attach_adapter(struct i2c_adapter *adapter); -static int pcf8574_detect(struct i2c_adapter *adapter, int address, int kind); -static int pcf8574_detach_client(struct i2c_client *client); static void pcf8574_init_client(struct i2c_client *client); -/* This is the driver that will be inserted */ -static struct i2c_driver pcf8574_driver = { - .driver = { - .name = "pcf8574", - }, - .attach_adapter = pcf8574_attach_adapter, - .detach_client = pcf8574_detach_client, -}; - /* following are the sysfs callback functions */ static ssize_t show_read(struct device *dev, struct device_attribute *attr, char *buf) { @@ -119,41 +101,22 @@ static const struct attribute_group pcf8574_attr_group = { * Real code */ -static int pcf8574_attach_adapter(struct i2c_adapter *adapter) -{ - return i2c_probe(adapter, &addr_data, pcf8574_detect); -} - -/* This function is called by i2c_probe */ -static int pcf8574_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int pcf8574_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - struct i2c_client *client; - struct pcf8574_data *data; - int err = 0; - const char *client_name = ""; + struct i2c_adapter *adapter = client->adapter; + const char *client_name; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) - 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. */ - if (!(data = kzalloc(sizeof(struct pcf8574_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - client = &data->client; - i2c_set_clientdata(client, data); - client->addr = address; - client->adapter = adapter; - client->driver = &pcf8574_driver; + return -ENODEV; /* Now, we would do the remaining detection. But the PCF8574 is plainly impossible to detect! Stupid chip. */ /* Determine the chip type */ if (kind <= 0) { - if (address >= 0x38 && address <= 0x3f) + if (client->addr >= 0x38 && client->addr <= 0x3f) kind = pcf8574a; else kind = pcf8574; @@ -163,40 +126,43 @@ static int pcf8574_detect(struct i2c_adapter *adapter, int address, int kind) client_name = "pcf8574a"; else client_name = "pcf8574"; + strlcpy(info->type, client_name, I2C_NAME_SIZE); - /* Fill in the remaining client fields and put it into the global list */ - strlcpy(client->name, client_name, I2C_NAME_SIZE); + return 0; +} + +static int pcf8574_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pcf8574_data *data; + int err; + + data = kzalloc(sizeof(struct pcf8574_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; + } + + i2c_set_clientdata(client, data); - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto exit_free; - /* Initialize the PCF8574 chip */ pcf8574_init_client(client); /* Register sysfs hooks */ err = sysfs_create_group(&client->dev.kobj, &pcf8574_attr_group); if (err) - goto exit_detach; + goto exit_free; return 0; - exit_detach: - i2c_detach_client(client); exit_free: kfree(data); exit: return err; } -static int pcf8574_detach_client(struct i2c_client *client) +static int pcf8574_remove(struct i2c_client *client) { - int err; - sysfs_remove_group(&client->dev.kobj, &pcf8574_attr_group); - - if ((err = i2c_detach_client(client))) - return err; - kfree(i2c_get_clientdata(client)); return 0; } @@ -208,6 +174,24 @@ static void pcf8574_init_client(struct i2c_client *client) data->write = -EAGAIN; } +static const struct i2c_device_id pcf8574_id[] = { + { "pcf8574", 0 }, + { "pcf8574a", 0 }, + { } +}; + +static struct i2c_driver pcf8574_driver = { + .driver = { + .name = "pcf8574", + }, + .probe = pcf8574_probe, + .remove = pcf8574_remove, + .id_table = pcf8574_id, + + .detect = pcf8574_detect, + .address_data = &addr_data, +}; + static int __init pcf8574_init(void) { return i2c_add_driver(&pcf8574_driver); diff --git a/drivers/i2c/chips/pcf8575.c b/drivers/i2c/chips/pcf8575.c index 3ea08ac0bfa3..07fd7cb3c57d 100644 --- a/drivers/i2c/chips/pcf8575.c +++ b/drivers/i2c/chips/pcf8575.c @@ -32,11 +32,8 @@ #include <linux/slab.h> /* kzalloc() */ #include <linux/sysfs.h> /* sysfs_create_group() */ -/* Addresses to scan */ -static const unsigned short normal_i2c[] = { - 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, - I2C_CLIENT_END -}; +/* Addresses to scan: none, device can't be detected */ +static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD; @@ -44,24 +41,9 @@ I2C_CLIENT_INSMOD; /* Each client has this additional data */ struct pcf8575_data { - struct i2c_client client; int write; /* last written value, or error code */ }; -static int pcf8575_attach_adapter(struct i2c_adapter *adapter); -static int pcf8575_detect(struct i2c_adapter *adapter, int address, int kind); -static int pcf8575_detach_client(struct i2c_client *client); - -/* This is the driver that will be inserted */ -static struct i2c_driver pcf8575_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "pcf8575", - }, - .attach_adapter = pcf8575_attach_adapter, - .detach_client = pcf8575_detach_client, -}; - /* following are the sysfs callback functions */ static ssize_t show_read(struct device *dev, struct device_attribute *attr, char *buf) @@ -126,75 +108,77 @@ static const struct attribute_group pcf8575_attr_group = { * Real code */ -static int pcf8575_attach_adapter(struct i2c_adapter *adapter) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int pcf8575_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - return i2c_probe(adapter, &addr_data, pcf8575_detect); + struct i2c_adapter *adapter = client->adapter; + + if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) + return -ENODEV; + + /* This is the place to detect whether the chip at the specified + address really is a PCF8575 chip. However, there is no method known + to detect whether an I2C chip is a PCF8575 or any other I2C chip. */ + + strlcpy(info->type, "pcf8575", I2C_NAME_SIZE); + + return 0; } -/* This function is called by i2c_probe */ -static int pcf8575_detect(struct i2c_adapter *adapter, int address, int kind) +static int pcf8575_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct i2c_client *client; struct pcf8575_data *data; - int err = 0; - - if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) - goto exit; + int err; - /* OK. For now, we presume we have a valid client. We now create the - client structure, even though we cannot fill it completely yet. */ data = kzalloc(sizeof(struct pcf8575_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 = &pcf8575_driver; - strlcpy(client->name, "pcf8575", I2C_NAME_SIZE); data->write = -EAGAIN; - /* This is the place to detect whether the chip at the specified - address really is a PCF8575 chip. However, there is no method known - to detect whether an I2C chip is a PCF8575 or any other I2C chip. */ - - /* Tell the I2C layer a new client has arrived */ - err = i2c_attach_client(client); - if (err) - goto exit_free; - /* Register sysfs hooks */ err = sysfs_create_group(&client->dev.kobj, &pcf8575_attr_group); if (err) - goto exit_detach; + goto exit_free; return 0; -exit_detach: - i2c_detach_client(client); exit_free: kfree(data); exit: return err; } -static int pcf8575_detach_client(struct i2c_client *client) +static int pcf8575_remove(struct i2c_client *client) { - int err; - sysfs_remove_group(&client->dev.kobj, &pcf8575_attr_group); - - err = i2c_detach_client(client); - if (err) - return err; - kfree(i2c_get_clientdata(client)); return 0; } +static const struct i2c_device_id pcf8575_id[] = { + { "pcf8575", 0 }, + { } +}; + +static struct i2c_driver pcf8575_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "pcf8575", + }, + .probe = pcf8575_probe, + .remove = pcf8575_remove, + .id_table = pcf8575_id, + + .detect = pcf8575_detect, + .address_data = &addr_data, +}; + static int __init pcf8575_init(void) { return i2c_add_driver(&pcf8575_driver); diff --git a/drivers/i2c/chips/pcf8591.c b/drivers/i2c/chips/pcf8591.c index db735379f22f..16ce3e193776 100644 --- a/drivers/i2c/chips/pcf8591.c +++ b/drivers/i2c/chips/pcf8591.c @@ -72,28 +72,15 @@ MODULE_PARM_DESC(input_mode, #define REG_TO_SIGNED(reg) (((reg) & 0x80)?((reg) - 256):(reg)) struct pcf8591_data { - struct i2c_client client; struct mutex update_lock; u8 control; u8 aout; }; -static int pcf8591_attach_adapter(struct i2c_adapter *adapter); -static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind); -static int pcf8591_detach_client(struct i2c_client *client); static void pcf8591_init_client(struct i2c_client *client); static int pcf8591_read_channel(struct device *dev, int channel); -/* This is the driver that will be inserted */ -static struct i2c_driver pcf8591_driver = { - .driver = { - .name = "pcf8591", - }, - .attach_adapter = pcf8591_attach_adapter, - .detach_client = pcf8591_detach_client, -}; - /* following are the sysfs callback functions */ #define show_in_channel(channel) \ static ssize_t show_in##channel##_input(struct device *dev, struct device_attribute *attr, char *buf) \ @@ -180,58 +167,46 @@ static const struct attribute_group pcf8591_attr_group_opt = { /* * Real code */ -static int pcf8591_attach_adapter(struct i2c_adapter *adapter) -{ - return i2c_probe(adapter, &addr_data, pcf8591_detect); -} -/* This function is called by i2c_probe */ -static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int pcf8591_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - struct i2c_client *client; - struct pcf8591_data *data; - int err = 0; + struct i2c_adapter *adapter = client->adapter; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) - goto exit; + return -ENODEV; + + /* Now, we would do the remaining detection. But the PCF8591 is plainly + impossible to detect! Stupid chip. */ + + strlcpy(info->type, "pcf8591", I2C_NAME_SIZE); + + return 0; +} + +static int pcf8591_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct pcf8591_data *data; + int err; - /* OK. For now, we presume we have a valid client. We now create the - client structure, even though we cannot fill it completely yet. */ if (!(data = kzalloc(sizeof(struct pcf8591_data), GFP_KERNEL))) { err = -ENOMEM; goto exit; } - client = &data->client; i2c_set_clientdata(client, data); - client->addr = address; - client->adapter = adapter; - client->driver = &pcf8591_driver; - - /* Now, we would do the remaining detection. But the PCF8591 is plainly - impossible to detect! Stupid chip. */ - - /* Determine the chip type - only one kind supported! */ - if (kind <= 0) - kind = pcf8591; - - /* Fill in the remaining client fields and put it into the global - list */ - strlcpy(client->name, "pcf8591", I2C_NAME_SIZE); mutex_init(&data->update_lock); - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto exit_kfree; - /* Initialize the PCF8591 chip */ pcf8591_init_client(client); /* Register sysfs hooks */ err = sysfs_create_group(&client->dev.kobj, &pcf8591_attr_group); if (err) - goto exit_detach; + goto exit_kfree; /* Register input2 if not in "two differential inputs" mode */ if (input_mode != 3) { @@ -252,24 +227,16 @@ static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind) exit_sysfs_remove: sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt); sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group); -exit_detach: - i2c_detach_client(client); exit_kfree: kfree(data); exit: return err; } -static int pcf8591_detach_client(struct i2c_client *client) +static int pcf8591_remove(struct i2c_client *client) { - int err; - sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt); sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group); - - if ((err = i2c_detach_client(client))) - return err; - kfree(i2c_get_clientdata(client)); return 0; } @@ -316,6 +283,25 @@ static int pcf8591_read_channel(struct device *dev, int channel) return (10 * value); } +static const struct i2c_device_id pcf8591_id[] = { + { "pcf8591", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pcf8591_id); + +static struct i2c_driver pcf8591_driver = { + .driver = { + .name = "pcf8591", + }, + .probe = pcf8591_probe, + .remove = pcf8591_remove, + .id_table = pcf8591_id, + + .class = I2C_CLASS_HWMON, /* Nearest choice */ + .detect = pcf8591_detect, + .address_data = &addr_data, +}; + static int __init pcf8591_init(void) { if (input_mode < 0 || input_mode > 3) { |
