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| author | Guenter Roeck <linux@roeck-us.net> | 2021-11-05 21:58:51 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2022-07-13 08:38:18 -0700 |
| commit | 904a6fe689e28abff09c6b039a3dacec5a586c91 (patch) | |
| tree | 8959bf14cb3a41057aa78c509fa815c6c5c16289 /Documentation/hwmon | |
| parent | e9684fdbdc525950eb006cfad195aaaf46cf5310 (diff) | |
| download | lwn-904a6fe689e28abff09c6b039a3dacec5a586c91.tar.gz lwn-904a6fe689e28abff09c6b039a3dacec5a586c91.zip | |
hwmon: (lm90) Add explicit support for MAX6648/MAX6692
Unlike MAX6646/MAX6647/MAX6649, MAX6648 and MAX6692 only support
a temperature range of 0..127 degrees C. Separate support for the
two sets of chips to be able to support maximum temperature ranges
correctly for all chips. Introduce new feature flag to indicate
temperature support up to 255 degrees C.
Since the chips are almost identical except for the supported temperature
range, automatic chip detection is limited. Effectively this means that
MAX6648 may be mis-detected as MAX6649 when auto-detected, but there is
nothing we can do about that.
Devicetree nodes are not added for the added chips since it is quite
unlikely that such old chips will ever be used in a devicetree based
system. They can be added later if needed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/lm90.rst | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/hwmon/lm90.rst b/Documentation/hwmon/lm90.rst index 9886a298797f..e947e609990b 100644 --- a/Documentation/hwmon/lm90.rst +++ b/Documentation/hwmon/lm90.rst @@ -105,7 +105,7 @@ Supported chips: * Maxim MAX6648 - Prefix: 'max6646' + Prefix: 'max6648' Addresses scanned: I2C 0x4c @@ -191,7 +191,7 @@ Supported chips: * Maxim MAX6692 - Prefix: 'max6646' + Prefix: 'max6648' Addresses scanned: I2C 0x4c @@ -324,6 +324,14 @@ ADT7461, ADT7461A, NCT1008: * Lower resolution for remote temperature * SMBus PEC support for Write Byte and Receive Byte transactions. +MAX6646, MAX6647, MAX6649: + * Better local resolution + * Extended range unsigned external temperature + +MAX6648, MAX6692: + * Better local resolution + * Unsigned temperature + MAX6654: * Better local resolution * Selectable address |