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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
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Kernel driver max6620
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=====================
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Supported chips:
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Maxim MAX6620
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Prefix: 'max6620'
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Addresses scanned: none
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Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6620.pdf
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Authors:
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- L\. Grunenberg <contact@lgrunenberg.de>
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- Cumulus Networks <support@cumulusnetworks.com>
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- Shuotian Cheng <shuche@microsoft.com>
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- Arun Saravanan Balachandran <Arun_Saravanan_Balac@dell.com>
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Description
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-----------
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This driver implements support for Maxim MAX6620 fan controller.
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The driver configures the fan controller in RPM mode. To give the readings more
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range or accuracy, the desired value can be set by a programmable register
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(1, 2, 4, 8, 16 or 32). Set higher values for larger speeds.
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The driver provides the following sensor access in sysfs:
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================ ======= =====================================================
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fan[1-4]_alarm ro Fan alarm.
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fan[1-4]_div rw Sets the nominal RPM range of the fan. Valid values
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are 1, 2, 4, 8, 16 and 32.
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fan[1-4]_input ro Fan speed in RPM.
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fan[1-4]_target rw Desired fan speed in RPM.
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================ ======= =====================================================
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Usage notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
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details.
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