hwmon: (adt7475) Improve device detection
Check the value of register 0x3f as part of the device detection, to make it more robust. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: "Darrick J. Wong" <djwong@us.ibm.com>
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@ -47,6 +47,7 @@
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#define REG_DEVID 0x3D
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#define REG_VENDID 0x3E
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#define REG_DEVID2 0x3F
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#define REG_STATUS1 0x41
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#define REG_STATUS2 0x42
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@ -1014,18 +1015,22 @@ static int adt7475_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_adapter *adapter = client->adapter;
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int vendid, devid;
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int vendid, devid, devid2;
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const char *name;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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vendid = adt7475_read(REG_VENDID);
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devid = adt7475_read(REG_DEVID);
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devid2 = adt7475_read(REG_DEVID2);
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if (vendid != 0x41 || /* Analog Devices */
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(devid2 & 0xf8) != 0x68)
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return -ENODEV;
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if (vendid == 0x41 && devid == 0x73)
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devid = adt7475_read(REG_DEVID);
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if (devid == 0x73)
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name = "adt7473";
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else if (vendid == 0x41 && devid == 0x75 && client->addr == 0x2e)
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else if (devid == 0x75 && client->addr == 0x2e)
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name = "adt7475";
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else {
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dev_dbg(&adapter->dev,
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