diff options
Diffstat (limited to 'drivers/misc/eeprom/max6875.c')
| -rw-r--r-- | drivers/misc/eeprom/max6875.c | 98 |
1 files changed, 33 insertions, 65 deletions
diff --git a/drivers/misc/eeprom/max6875.c b/drivers/misc/eeprom/max6875.c index 3c0c58eed34..580ff9df552 100644 --- a/drivers/misc/eeprom/max6875.c +++ b/drivers/misc/eeprom/max6875.c @@ -1,44 +1,37 @@ /* - max6875.c - driver for MAX6874/MAX6875 - - Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com> - - Based on eeprom.c - - The MAX6875 has a bank of registers and two banks of EEPROM. - Address ranges are defined as follows: - * 0x0000 - 0x0046 = configuration registers - * 0x8000 - 0x8046 = configuration EEPROM - * 0x8100 - 0x82FF = user EEPROM - - This driver makes the user EEPROM available for read. - - The registers & config EEPROM should be accessed via i2c-dev. - - The MAX6875 ignores the lowest address bit, so each chip responds to - two addresses - 0x50/0x51 and 0x52/0x53. - - Note that the MAX6875 uses i2c_smbus_write_byte_data() to set the read - address, so this driver is destructive if loaded for the wrong EEPROM chip. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. -*/ + * max6875.c - driver for MAX6874/MAX6875 + * + * Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com> + * + * Based on eeprom.c + * + * The MAX6875 has a bank of registers and two banks of EEPROM. + * Address ranges are defined as follows: + * * 0x0000 - 0x0046 = configuration registers + * * 0x8000 - 0x8046 = configuration EEPROM + * * 0x8100 - 0x82FF = user EEPROM + * + * This driver makes the user EEPROM available for read. + * + * The registers & config EEPROM should be accessed via i2c-dev. + * + * The MAX6875 ignores the lowest address bit, so each chip responds to + * two addresses - 0x50/0x51 and 0x52/0x53. + * + * Note that the MAX6875 uses i2c_smbus_write_byte_data() to set the read + * address, so this driver is destructive if loaded for the wrong EEPROM chip. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ #include <linux/kernel.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/mutex.h> -/* Do not scan - the MAX6875 access method will write to some EEPROM chips */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD_1(max6875); - /* The MAX6875 can only read/write 16 bytes at a time */ #define SLICE_SIZE 16 #define SLICE_BITS 4 @@ -113,7 +106,7 @@ exit_up: mutex_unlock(&data->update_lock); } -static ssize_t max6875_read(struct kobject *kobj, +static ssize_t max6875_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { @@ -146,31 +139,21 @@ static struct bin_attribute user_eeprom_attr = { .read = max6875_read, }; -/* Return 0 if detection is successful, -ENODEV otherwise */ -static int max6875_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) +static int max6875_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct i2c_adapter *adapter = client->adapter; + struct max6875_data *data; + int err; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA | I2C_FUNC_SMBUS_READ_BYTE)) return -ENODEV; - /* Only check even addresses */ + /* Only bind to even addresses */ 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; @@ -222,25 +205,10 @@ static struct i2c_driver max6875_driver = { .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); -} - -static void __exit max6875_exit(void) -{ - i2c_del_driver(&max6875_driver); -} - +module_i2c_driver(max6875_driver); MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>"); MODULE_DESCRIPTION("MAX6875 driver"); MODULE_LICENSE("GPL"); - -module_init(max6875_init); -module_exit(max6875_exit); |