forked from Minki/linux
hwmon: (fschmd) Convert to a new-style i2c driver
The new-style fschmd driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <j.w.r.degoede@hhs.nl>
This commit is contained in:
Jean Delvare
Jean Delvare
parent
c2df1591df
commit
40ac1994bf
@ -171,20 +171,37 @@ static const int FSCHMD_NO_TEMP_SENSORS[5] = { 3, 3, 4, 3, 5 };
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* Functions declarations
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*/
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static int fschmd_attach_adapter(struct i2c_adapter *adapter);
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static int fschmd_detach_client(struct i2c_client *client);
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static int fschmd_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int fschmd_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info);
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static int fschmd_remove(struct i2c_client *client);
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static struct fschmd_data *fschmd_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 fschmd_id[] = {
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{ "fscpos", fscpos },
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{ "fscher", fscher },
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{ "fscscy", fscscy },
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{ "fschrc", fschrc },
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{ "fschmd", fschmd },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, fschmd_id);
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static struct i2c_driver fschmd_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = FSCHMD_NAME,
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},
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.attach_adapter = fschmd_attach_adapter,
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.detach_client = fschmd_detach_client,
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.probe = fschmd_probe,
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.remove = fschmd_remove,
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.id_table = fschmd_id,
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.detect = fschmd_detect,
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.address_data = &addr_data,
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};
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/*
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@ -192,7 +209,6 @@ static struct i2c_driver fschmd_driver = {
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*/
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struct fschmd_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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int kind;
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@ -269,7 +285,7 @@ static ssize_t store_temp_max(struct device *dev, struct device_attribute
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v = SENSORS_LIMIT(v, -128, 127) + 128;
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(&data->client,
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
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data->temp_max[index] = v;
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mutex_unlock(&data->update_lock);
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@ -346,14 +362,14 @@ static ssize_t store_fan_div(struct device *dev, struct device_attribute
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mutex_lock(&data->update_lock);
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reg = i2c_smbus_read_byte_data(&data->client,
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reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
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/* bits 2..7 reserved => mask with 0x03 */
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reg &= ~0x03;
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reg |= v;
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i2c_smbus_write_byte_data(&data->client,
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
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data->fan_ripple[index] = reg;
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@ -416,7 +432,7 @@ static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(&data->client,
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i2c_smbus_write_byte_data(to_i2c_client(dev),
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FSCHMD_REG_FAN_MIN[data->kind][index], v);
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data->fan_min[index] = v;
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@ -448,14 +464,14 @@ static ssize_t store_alert_led(struct device *dev,
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mutex_lock(&data->update_lock);
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reg = i2c_smbus_read_byte_data(&data->client, FSCHMD_REG_CONTROL);
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reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
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if (v)
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reg |= FSCHMD_CONTROL_ALERT_LED_MASK;
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else
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reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK;
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i2c_smbus_write_byte_data(&data->client, FSCHMD_REG_CONTROL, reg);
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i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
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data->global_control = reg;
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@ -600,32 +616,15 @@ static void fschmd_dmi_decode(const struct dmi_header *header)
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}
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}
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static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind)
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static int fschmd_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 fschmd_data *data;
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u8 revision;
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const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
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"Heracles", "Heimdall" };
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struct i2c_adapter *adapter = client->adapter;
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const char * const client_names[5] = { "fscpos", "fscher", "fscscy",
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"fschrc", "fschmd" };
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int i, err = 0;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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/* OK. For now, we presume we have a valid client. We now create the
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* client structure, even though we cannot fill it completely yet.
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* But it allows us to access i2c_smbus_read_byte_data. */
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if (!(data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL)))
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return -ENOMEM;
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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 = &fschmd_driver;
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mutex_init(&data->update_lock);
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return -ENODEV;
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/* Detect & Identify the chip */
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if (kind <= 0) {
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@ -650,9 +649,31 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind)
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else if (!strcmp(id, "HMD"))
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kind = fschmd;
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else
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goto exit_free;
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return -ENODEV;
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}
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strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE);
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return 0;
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}
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static int fschmd_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct fschmd_data *data;
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u8 revision;
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const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
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"Heracles", "Heimdall" };
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int i, err;
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enum chips kind = id->driver_data;
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data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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i2c_set_clientdata(client, data);
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mutex_init(&data->update_lock);
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if (kind == fscpos) {
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/* The Poseidon has hardwired temp limits, fill these
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in for the alarm resetting code */
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@ -674,11 +695,6 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind)
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/* i2c kind goes from 1-5, we want from 0-4 to address arrays */
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data->kind = kind - 1;
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strlcpy(client->name, client_names[data->kind], I2C_NAME_SIZE);
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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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for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) {
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err = device_create_file(&client->dev,
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@ -726,25 +742,14 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind)
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return 0;
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exit_detach:
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fschmd_detach_client(client); /* will also free data for us */
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return err;
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exit_free:
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kfree(data);
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fschmd_remove(client); /* will also free data for us */
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return err;
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}
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static int fschmd_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, fschmd_detect);
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}
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static int fschmd_detach_client(struct i2c_client *client)
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static int fschmd_remove(struct i2c_client *client)
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{
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struct fschmd_data *data = i2c_get_clientdata(client);
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int i, err;
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int i;
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/* Check if registered in case we're called from fschmd_detect
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to cleanup after an error */
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@ -760,9 +765,6 @@ static int fschmd_detach_client(struct i2c_client *client)
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device_remove_file(&client->dev,
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&fschmd_fan_attr[i].dev_attr);
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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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