forked from Minki/linux
hwmon: (adm1025) Convert to a new-style i2c driver
The new-style adm1025 driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare
Jean Delvare
parent
65817ed8d1
commit
7dbafe021b
@ -2,7 +2,7 @@
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* adm1025.c
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*
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* Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
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* Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
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* Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
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*
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* The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
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* voltages (including its own power source) and up to two temperatures
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@ -109,22 +109,35 @@ static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
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* Functions declaration
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*/
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static int adm1025_attach_adapter(struct i2c_adapter *adapter);
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static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
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static int adm1025_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int adm1025_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info);
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static void adm1025_init_client(struct i2c_client *client);
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static int adm1025_detach_client(struct i2c_client *client);
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static int adm1025_remove(struct i2c_client *client);
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static struct adm1025_data *adm1025_update_device(struct device *dev);
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id adm1025_id[] = {
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{ "adm1025", adm1025 },
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{ "ne1619", ne1619 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm1025_id);
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static struct i2c_driver adm1025_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "adm1025",
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},
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.attach_adapter = adm1025_attach_adapter,
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.detach_client = adm1025_detach_client,
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.probe = adm1025_probe,
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.remove = adm1025_remove,
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.id_table = adm1025_id,
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.detect = adm1025_detect,
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.address_data = &addr_data,
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};
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/*
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@ -132,7 +145,6 @@ static struct i2c_driver adm1025_driver = {
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*/
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struct adm1025_data {
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struct i2c_client client;
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid; /* zero until following fields are valid */
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@ -344,13 +356,6 @@ static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
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* Real code
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*/
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static int adm1025_attach_adapter(struct i2c_adapter *adapter)
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{
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if (!(adapter->class & I2C_CLASS_HWMON))
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return 0;
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return i2c_probe(adapter, &addr_data, adm1025_detect);
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}
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static struct attribute *adm1025_attributes[] = {
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&sensor_dev_attr_in0_input.dev_attr.attr,
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&sensor_dev_attr_in1_input.dev_attr.attr,
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@ -403,31 +408,16 @@ static const struct attribute_group adm1025_group_in4 = {
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.attrs = adm1025_attributes_in4,
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};
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/*
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* The following function does more than just detection. If detection
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* succeeds, it also registers the new chip.
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*/
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static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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/* Return 0 if detection is successful, -ENODEV otherwise */
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static int adm1025_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info)
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{
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struct i2c_client *client;
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struct adm1025_data *data;
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int err = 0;
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struct i2c_adapter *adapter = client->adapter;
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const char *name = "";
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u8 config;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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goto exit;
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if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
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err = -ENOMEM;
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goto exit;
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}
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client = &data->client;
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i2c_set_clientdata(client, data);
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client->addr = address;
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client->adapter = adapter;
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client->driver = &adm1025_driver;
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return -ENODEV;
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/*
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* Now we do the remaining detection. A negative kind means that
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@ -448,8 +438,8 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
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dev_dbg(&adapter->dev,
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"ADM1025 detection failed at 0x%02x.\n",
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address);
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goto exit_free;
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client->addr);
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return -ENODEV;
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}
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}
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@ -465,7 +455,7 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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}
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} else
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if (man_id == 0xA1) { /* Philips */
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if (address != 0x2E
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if (client->addr != 0x2E
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&& (chip_id & 0xF0) == 0x20) { /* NE1619 */
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kind = ne1619;
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}
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@ -475,7 +465,7 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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dev_info(&adapter->dev,
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"Unsupported chip (man_id=0x%02X, "
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"chip_id=0x%02X).\n", man_id, chip_id);
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goto exit_free;
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return -ENODEV;
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}
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}
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@ -484,23 +474,36 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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} else if (kind == ne1619) {
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name = "ne1619";
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}
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strlcpy(info->type, name, I2C_NAME_SIZE);
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/* We can fill in the remaining client fields */
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strlcpy(client->name, name, I2C_NAME_SIZE);
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return 0;
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}
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static int adm1025_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct adm1025_data *data;
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int err;
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u8 config;
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data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL);
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if (!data) {
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err = -ENOMEM;
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goto exit;
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}
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i2c_set_clientdata(client, data);
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mutex_init(&data->update_lock);
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/* Tell the I2C layer a new client has arrived */
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if ((err = i2c_attach_client(client)))
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goto exit_free;
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/* Initialize the ADM1025 chip */
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adm1025_init_client(client);
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/* Register sysfs hooks */
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if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))
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goto exit_detach;
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goto exit_free;
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/* Pin 11 is either in4 (+12V) or VID4 */
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config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
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if (!(config & 0x20)) {
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if ((err = sysfs_create_group(&client->dev.kobj,
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&adm1025_group_in4)))
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@ -518,8 +521,6 @@ static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
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exit_remove:
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sysfs_remove_group(&client->dev.kobj, &adm1025_group);
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sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
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exit_detach:
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i2c_detach_client(client);
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exit_free:
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kfree(data);
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exit:
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@ -568,18 +569,14 @@ static void adm1025_init_client(struct i2c_client *client)
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(reg&0x7E)|0x01);
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}
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static int adm1025_detach_client(struct i2c_client *client)
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static int adm1025_remove(struct i2c_client *client)
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{
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struct adm1025_data *data = i2c_get_clientdata(client);
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int err;
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hwmon_device_unregister(data->hwmon_dev);
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sysfs_remove_group(&client->dev.kobj, &adm1025_group);
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sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
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if ((err = i2c_detach_client(client)))
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return err;
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kfree(data);
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return 0;
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}
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