diff options
Diffstat (limited to 'drivers/i2c/chips/pca9539.c')
| -rw-r--r-- | drivers/i2c/chips/pca9539.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c deleted file mode 100644 index 270de4e..0000000 --- a/drivers/i2c/chips/pca9539.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - pca9539.c - 16-bit I/O port with interrupt and reset - - Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com> - - 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/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/hwmon-sysfs.h> - -/* Addresses to scan: none, device is not autodetected */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD_1(pca9539); - -enum pca9539_cmd -{ - PCA9539_INPUT_0 = 0, - PCA9539_INPUT_1 = 1, - PCA9539_OUTPUT_0 = 2, - PCA9539_OUTPUT_1 = 3, - PCA9539_INVERT_0 = 4, - PCA9539_INVERT_1 = 5, - PCA9539_DIRECTION_0 = 6, - PCA9539_DIRECTION_1 = 7, -}; - -/* following are the sysfs callback functions */ -static ssize_t pca9539_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct sensor_device_attribute *psa = to_sensor_dev_attr(attr); - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%d\n", i2c_smbus_read_byte_data(client, - psa->index)); -} - -static ssize_t pca9539_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct sensor_device_attribute *psa = to_sensor_dev_attr(attr); - struct i2c_client *client = to_i2c_client(dev); - unsigned long val = simple_strtoul(buf, NULL, 0); - if (val > 0xff) - return -EINVAL; - i2c_smbus_write_byte_data(client, psa->index, val); - return count; -} - -/* Define the device attributes */ - -#define PCA9539_ENTRY_RO(name, cmd_idx) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO, pca9539_show, NULL, cmd_idx) - -#define PCA9539_ENTRY_RW(name, cmd_idx) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO | S_IWUSR, pca9539_show, \ - pca9539_store, cmd_idx) - -PCA9539_ENTRY_RO(input0, PCA9539_INPUT_0); -PCA9539_ENTRY_RO(input1, PCA9539_INPUT_1); -PCA9539_ENTRY_RW(output0, PCA9539_OUTPUT_0); -PCA9539_ENTRY_RW(output1, PCA9539_OUTPUT_1); -PCA9539_ENTRY_RW(invert0, PCA9539_INVERT_0); -PCA9539_ENTRY_RW(invert1, PCA9539_INVERT_1); -PCA9539_ENTRY_RW(direction0, PCA9539_DIRECTION_0); -PCA9539_ENTRY_RW(direction1, PCA9539_DIRECTION_1); - -static struct attribute *pca9539_attributes[] = { - &sensor_dev_attr_input0.dev_attr.attr, - &sensor_dev_attr_input1.dev_attr.attr, - &sensor_dev_attr_output0.dev_attr.attr, - &sensor_dev_attr_output1.dev_attr.attr, - &sensor_dev_attr_invert0.dev_attr.attr, - &sensor_dev_attr_invert1.dev_attr.attr, - &sensor_dev_attr_direction0.dev_attr.attr, - &sensor_dev_attr_direction1.dev_attr.attr, - NULL -}; - -static struct attribute_group pca9539_defattr_group = { - .attrs = pca9539_attributes, -}; - -/* Return 0 if detection is successful, -ENODEV otherwise */ -static int pca9539_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) -{ - struct i2c_adapter *adapter = client->adapter; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - return -ENODEV; - - strlcpy(info->type, "pca9539", I2C_NAME_SIZE); - - return 0; -} - -static int pca9539_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - /* 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); - 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); -} - -static void __exit pca9539_exit(void) -{ - i2c_del_driver(&pca9539_driver); -} - -MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>"); -MODULE_DESCRIPTION("PCA9539 driver"); -MODULE_LICENSE("GPL"); - -module_init(pca9539_init); -module_exit(pca9539_exit); - |
