diff options
| author | Thilo Cestonaro <thilo@cestona.ro> | 2016-08-16 14:07:53 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-09-09 07:34:16 +0300 |
| commit | 2d5aee433d9c5bb6075eb42039a21c5b3728d22d (patch) | |
| tree | b534bc94f26f2a6611eb5d75c9af0f1b5d5e0f35 /drivers/hwmon | |
| parent | ed42cfa881e1d8d9603b7cb872199e3c8e0d1b19 (diff) | |
| download | linux-2d5aee433d9c5bb6075eb42039a21c5b3728d22d.tar.xz | |
hwmon: (ftsteutates) Add i2c detect functionality
Signed-off-by: Thilo Cestonaro <thilo@cestona.ro>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/ftsteutates.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/hwmon/ftsteutates.c b/drivers/hwmon/ftsteutates.c index 48633e541dc3..0f0277e7aae5 100644 --- a/drivers/hwmon/ftsteutates.c +++ b/drivers/hwmon/ftsteutates.c @@ -36,6 +36,10 @@ #define FTS_EVENT_STATUS_REG 0x0006 #define FTS_GLOBAL_CONTROL_REG 0x0007 +#define FTS_DEVICE_DETECT_REG_1 0x0C +#define FTS_DEVICE_DETECT_REG_2 0x0D +#define FTS_DEVICE_DETECT_REG_3 0x0E + #define FTS_SENSOR_EVENT_REG 0x0010 #define FTS_FAN_EVENT_REG 0x0014 @@ -54,6 +58,8 @@ #define FTS_NO_TEMP_SENSORS 0x10 #define FTS_NO_VOLT_SENSORS 0x04 +static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; + static struct i2c_device_id fts_id[] = { { "ftsteutates", 0 }, { } @@ -734,6 +740,42 @@ static const struct attribute_group *fts_attr_groups[] = { /*****************************************************************************/ /* Module initialization / remove functions */ /*****************************************************************************/ +static int fts_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + int val; + + /* detection works with revsion greater or equal to 0x2b */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG); + if (val < 0x2b) + return -ENODEV; + + /* Device Detect Regs must have 0x17 0x34 and 0x54 */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1); + if (val != 0x17) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2); + if (val != 0x34) + return -ENODEV; + + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3); + if (val != 0x54) + return -ENODEV; + + /* + * 0x10 == Baseboard Management Controller, 0x01 == Teutates + * Device ID Reg needs to be 0x11 + */ + val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG); + if (val != 0x11) + return -ENODEV; + + strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE); + info->flags = 0; + return 0; +} + static int fts_remove(struct i2c_client *client) { struct fts_data *data = dev_get_drvdata(&client->dev); @@ -804,12 +846,15 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id) /* Module Details */ /*****************************************************************************/ static struct i2c_driver fts_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = "ftsteutates", }, .id_table = fts_id, .probe = fts_probe, .remove = fts_remove, + .detect = fts_detect, + .address_list = normal_i2c, }; module_i2c_driver(fts_driver); |