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| author |   Arun Saravanan Balachandran <Arun_Saravanan_Balac@dell.com> | 2021-09-13 13:40:15 +0000 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2021-10-12 07:22:37 -0700 |
| commit | e8ac01e5db329cf4ac2b36ef66b9d877330a990c (patch) | |
| tree | 470cc662a5af313fc6c5240b36b231caf94044cd /Documentation/hwmon | |
| parent | hwmon: (raspberrypi) Use generic notification mechanism (diff) | |
| download | linux-dev-e8ac01e5db329cf4ac2b36ef66b9d877330a990c.tar.xz linux-dev-e8ac01e5db329cf4ac2b36ef66b9d877330a990c.zip | |
hwmon: Add Maxim MAX6620 hardware monitoring driver
Add hardware monitoring driver for Maxim MAX6620 Fan controller
Originally-from: L. Grunenberg <contact@lgrunenberg.de>
Originally-from: Cumulus Networks <support@cumulusnetworks.com>
Originally-from: Shuotian Cheng <shuche@microsoft.com>
Signed-off-by: Arun Saravanan Balachandran <Arun_Saravanan_Balac@dell.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/hwmon/max6620.rst | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index f790f1260c33..7046bf1870d9 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -130,6 +130,7 @@ Hardware Monitoring Kernel Drivers max31785 max31790 max34440 + max6620 max6639 max6642 max6650 diff --git a/Documentation/hwmon/max6620.rst b/Documentation/hwmon/max6620.rst new file mode 100644 index 000000000000..84c1c44d3de4 --- /dev/null +++ b/Documentation/hwmon/max6620.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver max6620 +===================== + +Supported chips: + + Maxim MAX6620 + + Prefix: 'max6620' + + Addresses scanned: none + + Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6620.pdf + +Authors: + - L\. Grunenberg <contact@lgrunenberg.de> + - Cumulus Networks <support@cumulusnetworks.com> + - Shuotian Cheng <shuche@microsoft.com> + - Arun Saravanan Balachandran <Arun_Saravanan_Balac@dell.com> + +Description +----------- + +This driver implements support for Maxim MAX6620 fan controller. + +The driver configures the fan controller in RPM mode. To give the readings more +range or accuracy, the desired value can be set by a programmable register +(1, 2, 4, 8, 16 or 32). Set higher values for larger speeds. + +The driver provides the following sensor access in sysfs: + +================ ======= ===================================================== +fan[1-4]_alarm ro Fan alarm. +fan[1-4]_div rw Sets the nominal RPM range of the fan. Valid values + are 1, 2, 4, 8, 16 and 32. +fan[1-4]_input ro Fan speed in RPM. +fan[1-4]_target rw Desired fan speed in RPM. +================ ======= ===================================================== + +Usage notes +----------- + +This driver does not auto-detect devices. You will have to instantiate the +devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for +details. |