38 lines
1.6 KiB
ReStructuredText
38 lines
1.6 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver emc2305
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=====================
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Supported chips:
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Microchip EMC2305, EMC2303, EMC2302, EMC2301
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Addresses scanned: I2C 0x27, 0x2c, 0x2d, 0x2e, 0x2f, 0x4c, 0x4d
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Prefixes: 'emc2305'
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Datasheet: Publicly available at the Microchip website :
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https://www.microchip.com/en-us/product/EMC2305
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Description:
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------------
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This driver implements support for Microchip EMC2301/2/3/5 RPM-based PWM Fan Controller.
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The EMC2305 Fan Controller supports up to 5 independently controlled PWM fan drives.
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Fan rotation speeds are reported in RPM.
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The driver supports the RPM-based PWM control to keep a fan at the desired speed.
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The driver provides the possibility to have one common PWM interface for all FANs
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or up to the maximum available or configured independent PWMs.
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The driver provides the following sysfs interfaces in hwmon subsystem:
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================= == ===================================================
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fan[1-5]_fault RO files for tachometers TACH1-TACH5 fault indication
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fan[1-5]_input RO files for tachometers TACH1-TACH5 input (in RPM)
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pwm[1-5] RW file for fan[1-5] target duty cycle (0..255)
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================= == ===================================================
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sysfs interfaces in thermal subsystem:
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================= == ========================================================================
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cur_state RW file for the current cooling state of the cooling device (0..max_state)
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max_state RO file for the maximum cooling state of the cooling device
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================= == ========================================================================
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