21 lines
748 B
ReStructuredText
21 lines
748 B
ReStructuredText
Kernel driver pwm-fan
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=====================
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This driver enables the use of a PWM module to drive a fan. It uses the
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generic PWM interface thus it is hardware independent. It can be used on
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many SoCs, as long as the SoC supplies a PWM line driver that exposes
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the generic PWM API.
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Author: Kamil Debski <k.debski@samsung.com>
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Description
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-----------
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The driver implements a simple interface for driving a fan connected to
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a PWM output. It uses the generic PWM interface, thus it can be used with
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a range of SoCs. The driver exposes the fan to the user space through
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the hwmon's sysfs interface.
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The fan rotation speed returned via the optional 'fan1_input' is extrapolated
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from the sampled interrupts from the tachometer signal within 1 second.
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