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- .. 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 <[email protected]>
- - Cumulus Networks <[email protected]>
- - Shuotian Cheng <[email protected]>
- - Arun Saravanan Balachandran <[email protected]>
- 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.
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