1 .. SPDX-License-Identifier: GPL-2.0-or-later
12 Addresses scanned: none
14 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max6620.pdf
17 - L\. Grunenberg <contact@lgrunenberg.de>
18 - Cumulus Networks <support@cumulusnetworks.com>
19 - Shuotian Cheng <shuche@microsoft.com>
20 - Arun Saravanan Balachandran <Arun_Saravanan_Balac@dell.com>
25 This driver implements support for Maxim MAX6620 fan controller.
27 The driver configures the fan controller in RPM mode. To give the readings more
28 range or accuracy, the desired value can be set by a programmable register
29 (1, 2, 4, 8, 16 or 32). Set higher values for larger speeds.
31 The driver provides the following sensor access in sysfs:
33 ================ ======= =====================================================
34 fan[1-4]_alarm ro Fan alarm.
35 fan[1-4]_div rw Sets the nominal RPM range of the fan. Valid values
36 are 1, 2, 4, 8, 16 and 32.
37 fan[1-4]_input ro Fan speed in RPM.
38 fan[1-4]_target rw Desired fan speed in RPM.
39 ================ ======= =====================================================
44 This driver does not auto-detect devices. You will have to instantiate the
45 devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for