* adm1025.c
*
* Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
- * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
*
* The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
* voltages (including its own power source) and up to two temperatures
* NE1619 has two possible addresses: 0x2c and 0x2d.
*/
-static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
-/*
- * Insmod parameters
- */
-
-I2C_CLIENT_INSMOD_2(adm1025, ne1619);
+enum chips { adm1025, ne1619 };
/*
* The ADM1025 registers
* Functions declaration
*/
-static int adm1025_attach_adapter(struct i2c_adapter *adapter);
-static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
+static int adm1025_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adm1025_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
static void adm1025_init_client(struct i2c_client *client);
-static int adm1025_detach_client(struct i2c_client *client);
+static int adm1025_remove(struct i2c_client *client);
static struct adm1025_data *adm1025_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id adm1025_id[] = {
+ { "adm1025", adm1025 },
+ { "ne1619", ne1619 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adm1025_id);
+
static struct i2c_driver adm1025_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "adm1025",
},
- .id = I2C_DRIVERID_ADM1025,
- .attach_adapter = adm1025_attach_adapter,
- .detach_client = adm1025_detach_client,
+ .probe = adm1025_probe,
+ .remove = adm1025_remove,
+ .id_table = adm1025_id,
+ .detect = adm1025_detect,
+ .address_list = normal_i2c,
};
/*
*/
struct adm1025_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct adm1025_data *data = i2c_get_clientdata(client);
+ struct adm1025_data *data = dev_get_drvdata(dev);
data->vrm = simple_strtoul(buf, NULL, 10);
return count;
}
* Real code
*/
-static int adm1025_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, adm1025_detect);
-}
-
static struct attribute *adm1025_attributes[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
.attrs = adm1025_attributes_in4,
};
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm1025_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct adm1025_data *data;
- int err = 0;
- const char *name = "";
- u8 config;
+ struct i2c_adapter *adapter = 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 adm1025_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
+ return -ENODEV;
+
+ /* Check for unused bits */
+ if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
+ || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
+ || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
+ dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
+ client->addr);
+ return -ENODEV;
}
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &adm1025_driver;
+ /* Identification */
+ chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
+ if ((chip_id & 0xF0) != 0x20)
+ return -ENODEV;
- /*
- * Now we do the remaining detection. A negative kind means that
- * the driver was loaded with no force parameter (default), so we
- * must both detect and identify the chip. 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.
- */
- config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
- if (kind < 0) { /* detection */
- if ((config & 0x80) != 0x00
- || (i2c_smbus_read_byte_data(client,
- ADM1025_REG_STATUS1) & 0xC0) != 0x00
- || (i2c_smbus_read_byte_data(client,
- ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
- dev_dbg(&adapter->dev,
- "ADM1025 detection failed at 0x%02x.\n",
- address);
- goto exit_free;
- }
- }
+ man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
+ if (man_id == 0x41)
+ name = "adm1025";
+ else if (man_id == 0xA1 && client->addr != 0x2E)
+ name = "ne1619";
+ else
+ return -ENODEV;
- if (kind <= 0) { /* identification */
- u8 man_id, chip_id;
-
- man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
- chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
-
- if (man_id == 0x41) { /* Analog Devices */
- if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
- kind = adm1025;
- }
- } else
- if (man_id == 0xA1) { /* Philips */
- if (address != 0x2E
- && (chip_id & 0xF0) == 0x20) { /* NE1619 */
- kind = ne1619;
- }
- }
+ 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 == adm1025) {
- name = "adm1025";
- } else if (kind == ne1619) {
- name = "ne1619";
+static int adm1025_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adm1025_data *data;
+ int err;
+ u8 config;
+
+ data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
}
- /* We can fill in the remaining client fields */
- strlcpy(client->name, name, I2C_NAME_SIZE);
+ i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
-
/* Initialize the ADM1025 chip */
adm1025_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))
- goto exit_detach;
+ goto exit_free;
/* Pin 11 is either in4 (+12V) or VID4 */
+ config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
if (!(config & 0x20)) {
if ((err = sysfs_create_group(&client->dev.kobj,
&adm1025_group_in4)))
exit_remove:
sysfs_remove_group(&client->dev.kobj, &adm1025_group);
sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
-exit_detach:
- i2c_detach_client(client);
exit_free:
kfree(data);
exit:
(reg&0x7E)|0x01);
}
-static int adm1025_detach_client(struct i2c_client *client)
+static int adm1025_remove(struct i2c_client *client)
{
struct adm1025_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &adm1025_group);
sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}