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The GXP SoC can support up to 16 fans through the interface provided by the CPLD. The current support is limited to 8 fans. The fans speeds are controlled via 8 different PWMs which can vary in value from 0-255. The fans are also capable of reporting if they have failed to the CPLD which in turn reports the status to the GXP SoC. Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com> Link: https://lore.kernel.org/r/20230103203654.59322-2-nick.hawkins@hpe.com [groeck: Improved alignment of defined, added missing include linux/bits.h] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
28 lines
758 B
ReStructuredText
28 lines
758 B
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.. SPDX-License-Identifier: GPL-2.0-only
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Kernel driver gxp-fan-ctrl
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==========================
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Supported chips:
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* HPE GXP SOC
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Author: Nick Hawkins <nick.hawkins@hpe.com>
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Description
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-----------
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gxp-fan-ctrl is a driver which provides fan control for the hpe gxp soc.
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The driver allows the gathering of fan status and the use of fan
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PWM control.
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Sysfs attributes
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----------------
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======================= ===========================================================
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pwm[0-7] Fan 0 to 7 respective PWM value (0-255)
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fan[0-7]_fault Fan 0 to 7 respective fault status: 1 fail, 0 ok
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fan[0-7]_enable Fan 0 to 7 respective enabled status: 1 enabled, 0 disabled
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======================= ===========================================================
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