Deleted: trunk/drivers/hwmon/ad5252.c (7226 => 7227)
--- trunk/drivers/hwmon/ad5252.c 2009-08-21 15:59:00 UTC (rev 7226)
+++ trunk/drivers/hwmon/ad5252.c 2009-08-24 08:59:31 UTC (rev 7227)
@@ -1,239 +0,0 @@
-/*
- * ad5252.c - Part of lm_sensors, Linux kernel modules for hardware
- * monitoring
- *
- * Driver for dual digitally controlled potentiometers
- *
- * Copyright (c) 2006 Michael Hennerich <[email protected]>
- *
- * derived from pcf8547.c
- *
- * Copyright (c) 2000 Frodo Looijaard <[email protected]>,
- * Philip Edelbrock <[email protected]>,
- * Dan Eaton <[email protected]>
- * Ported to Linux 2.6 by Aurelien Jarno <[email protected]> with
- * the help of Jean Delvare <[email protected]>
- *
- * Licensed under the GPL-2.
- */
-
-#define pr_fmt(fmt) "AD5252: " fmt
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/i2c.h>
-#include <linux/delay.h>
-
-/* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
-
-/* Insmod parameters */
-I2C_CLIENT_INSMOD_1(ad5252);
-
-/* Initial values */
-#define AD5252_INIT 128 /* Wiper in middle position */
-/* Each client has this additional data */
-struct ad5252_data {
- struct i2c_client client;
-
- u8 read, write; /* Register values */
-};
-
-static int ad5252_attach_adapter(struct i2c_adapter *adapter);
-static int ad5252_detect(struct i2c_adapter *adapter, int address, int kind);
-static int ad5252_detach_client(struct i2c_client *client);
-static void ad5252_init_client(struct i2c_client *client);
-
-/* This is the driver that will be inserted */
-static struct i2c_driver ad5252_driver = {
- .driver = {
- .name = "ad5252",
- },
- .id = I2C_DRIVERID_AD5252,
- .attach_adapter = ad5252_attach_adapter,
- .detach_client = ad5252_detach_client,
-};
-
-/* following are the sysfs callback functions */
-static ssize_t show_read_w1(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- return sprintf(buf, "%u\n", i2c_smbus_read_byte_data(client, 0x1));
-}
-
-static DEVICE_ATTR(read_w1, S_IRUGO, show_read_w1, NULL);
-
-static ssize_t show_read_w3(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- return sprintf(buf, "%u\n", i2c_smbus_read_byte_data(client, 0x3));
-}
-
-static DEVICE_ATTR(read_w3, S_IRUGO, show_read_w3, NULL);
-
-static ssize_t show_write(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct ad5252_data *data = ""
- return sprintf(buf, "%u\n", data->write);
-}
-
-static ssize_t set_write_w1(struct device *dev, struct device_attribute *attr, const char *buf,
- size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct ad5252_data *data = ""
- unsigned long val = simple_strtoul(buf, NULL, 10);
-
- if (val > 0xff)
- return -EINVAL;
-
- data->write = val;
-
- i2c_smbus_write_byte_data(client, 0x1, data->write);
- return count;
-}
-
-static DEVICE_ATTR(write_w1, S_IWUSR | S_IRUGO, show_write, set_write_w1);
-
-static ssize_t set_write_w3(struct device *dev, struct device_attribute *attr, const char *buf,
- size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct ad5252_data *data = ""
- unsigned long val = simple_strtoul(buf, NULL, 10);
-
- if (val > 0xff)
- return -EINVAL;
-
- data->write = val;
-
- i2c_smbus_write_byte_data(client, 0x3, data->write);
- return count;
-}
-
-static DEVICE_ATTR(write_w3, S_IWUSR | S_IRUGO, show_write, set_write_w3);
-
-/*
- * Real code
- */
-
-static int ad5252_attach_adapter(struct i2c_adapter *adapter)
-{
- return i2c_probe(adapter, &addr_data, ad5252_detect);
-}
-
-/* This function is called by i2c_detect */
-int ad5252_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct ad5252_data *data;
- int err = 0;
- 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. */
- data = "" GFP_KERNEL);
- if (data == NULL) {
- err = -ENOMEM;
- goto exit;
- }
-
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &ad5252_driver;
- new_client->flags = 0;
-
- /* Determine the chip type */
- if (kind <= 0) {
- if (address >= 0x2c && address <= 0x2f)
- kind = ad5252;
-
- }
-
- client_name = "ad5252";
-
- /* Fill in the remaining client fields and put it into the global list */
- strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
-
- /* Tell the I2C layer a new client has arrived */
-
- /* FIXME: Don't know why there needs to be a delay !!! */
- udelay(100);
-
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
- /* Initialize the AD5252 chip */
- ad5252_init_client(new_client);
-
- /* Register sysfs hooks */
- err = device_create_file(&new_client->dev, &dev_attr_read_w1);
- err |= device_create_file(&new_client->dev, &dev_attr_read_w3);
- err |= device_create_file(&new_client->dev, &dev_attr_write_w1);
- err |= device_create_file(&new_client->dev, &dev_attr_write_w3);
-
- if (err)
- pr_warning("failed to register sysfs hooks\n");
-
- pr_info("attached\n");
-
- return 0;
-
- exit_free:
- kfree(data);
- exit:
- pr_err("attaching failed\n");
- return err;
-}
-
-static int ad5252_detach_client(struct i2c_client *client)
-{
- int err;
-
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev,
- "Client deregistration failed, client not detached.\n");
- return err;
- }
-
- kfree(i2c_get_clientdata(client));
- return 0;
-}
-
-/* Called when we have found a new AD5252 */
-static void ad5252_init_client(struct i2c_client *client)
-{
-#if 0 /* probe isn't reliable */
- struct ad5252_data *data = ""
- data->write = AD5252_INIT;
- i2c_smbus_write_byte_data(client, 0x1, data->write);
- i2c_smbus_write_byte_data(client, 0x3, data->write);
-#endif
-}
-
-static int __init ad5252_init(void)
-{
- return i2c_add_driver(&ad5252_driver);
-}
-module_init(ad5252_init);
-
-static void __exit ad5252_exit(void)
-{
- i2c_del_driver(&ad5252_driver);
-}
-module_exit(ad5252_exit);
-
-MODULE_AUTHOR
- ("Michael Hennerich <[email protected]>, "
- "Frodo Looijaard <[email protected]>, "
- "Philip Edelbrock <[email protected]>, "
- "Dan Eaton <[email protected]> "
- "and Aurelien Jarno <[email protected]>");
-MODULE_DESCRIPTION("AD5252 digital potentiometer driver");
-MODULE_LICENSE("GPL");
