mirror of
https://github.com/torvalds/linux.git
synced 2024-12-04 01:51:34 +00:00
e8ac01e5db
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>
47 lines
1.4 KiB
ReStructuredText
47 lines
1.4 KiB
ReStructuredText
.. 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.
|