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20 lines
748 B
20 lines
748 B
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 <[email protected]> |
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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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