hwmon: (ds1621) Remove detect function
Due to a lack of device and vendor identification registers, the
Dallas/Maxim DS16xx devices cannot be uniquely detected, sometimes
resulting in false positives. Therefore, the detect function is
being removed in favor of explicit device instantiation.
Signed-off-by: Robert Coulson <rob.coulson@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/Documentation/hwmon/ds1621 b/Documentation/hwmon/ds1621
index 1ebaa24..8378066 100644
--- a/Documentation/hwmon/ds1621
+++ b/Documentation/hwmon/ds1621
@@ -4,24 +4,22 @@
Supported chips:
* Dallas Semiconductor / Maxim Integrated DS1621
Prefix: 'ds1621'
- Addresses scanned: I2C 0x48 - 0x4f
+ Addresses scanned: none
Datasheet: Publicly available from www.maximintegrated.com
* Dallas Semiconductor DS1625
- Prefix:
- 'ds1621' - if binding via _detect function
- 'ds1625' - explicit instantiation
- Addresses scanned: I2C 0x48 - 0x4f
+ Prefix: 'ds1625'
+ Addresses scanned: none
Datasheet: Publicly available from www.datasheetarchive.com
* Maxim Integrated DS1631
Prefix: 'ds1631'
- Addresses scanned: I2C 0x48 - 0x4f
+ Addresses scanned: none
Datasheet: Publicly available from www.maximintegrated.com
* Maxim Integrated DS1721
Prefix: 'ds1721'
- Addresses scanned: I2C 0x48 - 0x4f
+ Addresses scanned: none
Datasheet: Publicly available from www.maximintegrated.com
Authors:
@@ -77,12 +75,13 @@
but the DS1621 is meant to replace it. The DS1631 and DS1721 are also
pin compatible with the DS1621, but provide multi-resolution support.
-Since there is no version register, there is no unique identification
-for these devices. In addition, the DS1631 and DS1721 will emulate a
-DS1621 device, if not explicitly instantiated (why? because the detect
-function compares the temperature register values bits and checks for a
-9-bit resolution). Therefore, for correct device identification and
-functionality, explicit device instantiation is required.
+Since there is no version or vendor identification register, there is
+no unique identification for these devices. Therefore, explicit device
+instantiation is required for correct device identification and functionality.
+
+And, for correct identification and operation, each device must be
+explicitly instantiated, one device per address, in this address
+range: 0x48..0x4f.
The DS1721 is pin compatible with the DS1621, has an accuracy of +/- 1.0
degree Celsius over a -10 to +85 degree range, a minimum/maximum alarm