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authorGuenter Roeck <linux@roeck-us.net>2021-11-15 18:10:11 -0800
committerGuenter Roeck <linux@roeck-us.net>2022-07-13 08:38:18 -0700
commit3c1ecccbbc1389773c32fc56910cf23512fccfcd (patch)
tree3f48072fda24992541744847b98a2b71ce6f50b8 /Documentation/hwmon
parentca6bfa3b7325518a4b41c81c89a970976771f2ea (diff)
hwmon: (lm90) Add support for MAX6642
MAX6642 is a reduced version of LM90 with no low limits and no conversion rate register. Its alert functionality is broken, similar to many other chips supported by the lm90 driver. After this change, the stand-alone max6642 driver is only needed if the lm90 driver is disabled. Make it dependent on SENSORS_LM90=n to show that it is not needed if the lm90 driver is enabled. A devicetree node is not added for this chip since it is quite unlikely that such an old chip will ever be used in a devicetree based system. It 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.rst16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm90.rst b/Documentation/hwmon/lm90.rst
index 45bc333a1219..313b18f6531d 100644
--- a/Documentation/hwmon/lm90.rst
+++ b/Documentation/hwmon/lm90.rst
@@ -113,6 +113,16 @@ Supported chips:
https://www.onsemi.com/PowerSolutions/product.do?id=NCT1008
+ * Maxim MAX6642
+
+ Prefix: 'max6642'
+
+ Addresses scanned: I2C 0x48-0x4f
+
+ Datasheet: Publicly available at the Maxim website
+
+ http://datasheets.maxim-ic.com/en/ds/MAX6642.pdf
+
* Maxim MAX6646
Prefix: 'max6646'
@@ -362,6 +372,12 @@ ADT7481, ADT7482, ADT7483:
* Two remote sensors
* Selectable address (ADT7483)
+MAX6642:
+ * No critical limit register
+ * Conversion rate not configurable
+ * Better local resolution (10 bit)
+ * 10 bit external sensor resolution
+
MAX6646, MAX6647, MAX6649:
* Better local resolution
* Extended range unsigned external temperature