hwmon: (ftsteutates) Add i2c detect functionality
Signed-off-by: Thilo Cestonaro <thilo@cestona.ro> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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@ -36,6 +36,10 @@
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#define FTS_EVENT_STATUS_REG 0x0006
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#define FTS_GLOBAL_CONTROL_REG 0x0007
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#define FTS_DEVICE_DETECT_REG_1 0x0C
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#define FTS_DEVICE_DETECT_REG_2 0x0D
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#define FTS_DEVICE_DETECT_REG_3 0x0E
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#define FTS_SENSOR_EVENT_REG 0x0010
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#define FTS_FAN_EVENT_REG 0x0014
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@ -54,6 +58,8 @@
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#define FTS_NO_TEMP_SENSORS 0x10
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#define FTS_NO_VOLT_SENSORS 0x04
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static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
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static struct i2c_device_id fts_id[] = {
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{ "ftsteutates", 0 },
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{ }
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@ -734,6 +740,42 @@ static const struct attribute_group *fts_attr_groups[] = {
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/*****************************************************************************/
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/* Module initialization / remove functions */
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/*****************************************************************************/
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static int fts_detect(struct i2c_client *client,
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struct i2c_board_info *info)
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{
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int val;
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/* detection works with revsion greater or equal to 0x2b */
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val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
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if (val < 0x2b)
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return -ENODEV;
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/* Device Detect Regs must have 0x17 0x34 and 0x54 */
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val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
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if (val != 0x17)
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return -ENODEV;
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val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
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if (val != 0x34)
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return -ENODEV;
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val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
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if (val != 0x54)
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return -ENODEV;
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/*
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* 0x10 == Baseboard Management Controller, 0x01 == Teutates
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* Device ID Reg needs to be 0x11
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*/
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val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
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if (val != 0x11)
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return -ENODEV;
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strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
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info->flags = 0;
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return 0;
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}
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static int fts_remove(struct i2c_client *client)
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{
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struct fts_data *data = dev_get_drvdata(&client->dev);
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@ -804,12 +846,15 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
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/* Module Details */
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/*****************************************************************************/
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static struct i2c_driver fts_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "ftsteutates",
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},
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.id_table = fts_id,
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.probe = fts_probe,
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.remove = fts_remove,
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.detect = fts_detect,
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.address_list = normal_i2c,
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};
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module_i2c_driver(fts_driver);
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