X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fhwmon%2Flm83.c;h=08b03e6ed0b7adf3a21aab5ac42c4062982fa767;hb=dad48a4ef20774732e53840f371b0cc27981c43a;hp=0336b4572a61bd8001d909b78d1c69979e7e9889;hpb=1beeffe43311f64df8dd0ab08ff6b1858c58363f;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c index 0336b45..08b03e6 100644 --- a/drivers/hwmon/lm83.c +++ b/drivers/hwmon/lm83.c @@ -1,7 +1,7 @@ /* * lm83.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring - * Copyright (C) 2003-2006 Jean Delvare + * Copyright (C) 2003-2009 Jean Delvare * * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is * a sensor chip made by National Semiconductor. It reports up to four @@ -48,10 +48,8 @@ * addresses. */ -static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, - 0x29, 0x2a, 0x2b, - 0x4c, 0x4d, 0x4e, - I2C_CLIENT_END }; +static const unsigned short normal_i2c[] = { + 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; /* * Insmod parameters @@ -120,22 +118,34 @@ static const u8 LM83_REG_W_HIGH[] = { * Functions declaration */ -static int lm83_attach_adapter(struct i2c_adapter *adapter); -static int lm83_detect(struct i2c_adapter *adapter, int address, int kind); -static int lm83_detach_client(struct i2c_client *client); +static int lm83_detect(struct i2c_client *new_client, int kind, + struct i2c_board_info *info); +static int lm83_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int lm83_remove(struct i2c_client *client); static struct lm83_data *lm83_update_device(struct device *dev); /* * Driver data (common to all clients) */ +static const struct i2c_device_id lm83_id[] = { + { "lm83", lm83 }, + { "lm82", lm82 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm83_id); + static struct i2c_driver lm83_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = "lm83", }, - .id = I2C_DRIVERID_LM83, - .attach_adapter = lm83_attach_adapter, - .detach_client = lm83_detach_client, + .probe = lm83_probe, + .remove = lm83_remove, + .id_table = lm83_id, + .detect = lm83_detect, + .address_data = &addr_data, }; /* @@ -143,7 +153,6 @@ static struct i2c_driver lm83_driver = { */ struct lm83_data { - struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ @@ -281,109 +290,68 @@ static const struct attribute_group lm83_group_opt = { * Real code */ -static int lm83_attach_adapter(struct i2c_adapter *adapter) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm83_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, lm83_detect); -} - -/* - * The following function does more than just detection. If detection - * succeeds, it also registers the new chip. - */ -static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *new_client; - struct lm83_data *data; - int err = 0; - const char *name = ""; + struct i2c_adapter *adapter = new_client->adapter; + const char *name; + u8 man_id, chip_id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kzalloc(sizeof(struct lm83_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; + return -ENODEV; + + /* Detection */ + if ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) & 0xA8) || + (i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) & 0x48) || + (i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) & 0x41)) { + dev_dbg(&adapter->dev, "LM83 detection failed at 0x%02x\n", + new_client->addr); + return -ENODEV; } - /* The common I2C client data is placed right after the - * LM83-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &lm83_driver; - new_client->flags = 0; - - /* Now we do the detection and identification. A negative kind - * means that the driver was loaded with no force parameter - * (default), so we must both detect and identify the chip - * (actually there is only one possible kind of chip for now, LM83). - * A zero kind means that the driver was loaded with the force - * parameter, the detection step shall be skipped. A positive kind - * means that the driver was loaded with the force parameter and a - * given kind of chip is requested, so both the detection and the - * identification steps are skipped. */ - - /* Default to an LM83 if forced */ - if (kind == 0) - kind = lm83; - - if (kind < 0) { /* detection */ - if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) - & 0xA8) != 0x00) || - ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) - & 0x48) != 0x00) || - ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) - & 0x41) != 0x00)) { - dev_dbg(&adapter->dev, - "LM83 detection failed at 0x%02x.\n", address); - goto exit_free; - } + /* Identification */ + man_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_MAN_ID); + if (man_id != 0x01) /* National Semiconductor */ + return -ENODEV; + + chip_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_CHIP_ID); + switch (chip_id) { + case 0x03: + name = "lm83"; + break; + case 0x01: + name = "lm82"; + break; + default: + /* identification failed */ + dev_info(&adapter->dev, + "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", + man_id, chip_id); + return -ENODEV; } - if (kind <= 0) { /* identification */ - u8 man_id, chip_id; - - man_id = i2c_smbus_read_byte_data(new_client, - LM83_REG_R_MAN_ID); - chip_id = i2c_smbus_read_byte_data(new_client, - LM83_REG_R_CHIP_ID); - - if (man_id == 0x01) { /* National Semiconductor */ - if (chip_id == 0x03) { - kind = lm83; - } else - if (chip_id == 0x01) { - kind = lm82; - } - } + strlcpy(info->type, name, I2C_NAME_SIZE); - if (kind <= 0) { /* identification failed */ - dev_info(&adapter->dev, - "Unsupported chip (man_id=0x%02X, " - "chip_id=0x%02X).\n", man_id, chip_id); - goto exit_free; - } - } + return 0; +} - if (kind == lm83) { - name = "lm83"; - } else - if (kind == lm82) { - name = "lm82"; +static int lm83_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) +{ + struct lm83_data *data; + int err; + + data = kzalloc(sizeof(struct lm83_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; - /* * Register sysfs hooks * The LM82 can only monitor one external diode which is @@ -392,9 +360,9 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) */ if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group))) - goto exit_detach; + goto exit_free; - if (kind == lm83) { + if (id->driver_data == lm83) { if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group_opt))) goto exit_remove_files; @@ -411,26 +379,20 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) exit_remove_files: sysfs_remove_group(&new_client->dev.kobj, &lm83_group); sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt); -exit_detach: - i2c_detach_client(new_client); exit_free: kfree(data); exit: return err; } -static int lm83_detach_client(struct i2c_client *client) +static int lm83_remove(struct i2c_client *client) { struct lm83_data *data = i2c_get_clientdata(client); - int err; hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &lm83_group); sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); - if ((err = i2c_detach_client(client))) - return err; - kfree(data); return 0; }