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88 lines
2.5 KiB
88 lines
2.5 KiB
What: /sys/class/pwm/ |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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The pwm/ class sub-directory belongs to the Generic PWM |
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Framework and provides a sysfs interface for using PWM |
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channels. |
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What: /sys/class/pwm/pwmchipN/ |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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A /sys/class/pwm/pwmchipN directory is created for each |
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probed PWM controller/chip where N is the base of the |
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PWM chip. |
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What: /sys/class/pwm/pwmchipN/npwm |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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The number of PWM channels supported by the PWM chip. |
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What: /sys/class/pwm/pwmchipN/export |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Exports a PWM channel from the PWM chip for sysfs control. |
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Value is between 0 and /sys/class/pwm/pwmchipN/npwm - 1. |
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What: /sys/class/pwm/pwmchipN/unexport |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Unexports a PWM channel. |
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What: /sys/class/pwm/pwmchipN/pwmX |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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A /sys/class/pwm/pwmchipN/pwmX directory is created for |
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each exported PWM channel where X is the exported PWM |
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channel number. |
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What: /sys/class/pwm/pwmchipN/pwmX/period |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Sets the PWM signal period in nanoseconds. |
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What: /sys/class/pwm/pwmchipN/pwmX/duty_cycle |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Sets the PWM signal duty cycle in nanoseconds. |
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What: /sys/class/pwm/pwmchipN/pwmX/polarity |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Sets the output polarity of the PWM signal to "normal" or |
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"inversed". |
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What: /sys/class/pwm/pwmchipN/pwmX/enable |
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Date: May 2013 |
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KernelVersion: 3.11 |
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Contact: H Hartley Sweeten <[email protected]> |
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Description: |
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Enable/disable the PWM signal. |
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0 is disabled |
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1 is enabled |
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What: /sys/class/pwm/pwmchipN/pwmX/capture |
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Date: June 2016 |
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KernelVersion: 4.8 |
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Contact: Lee Jones <[email protected]> |
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Description: |
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Capture information about a PWM signal. The output format is a |
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pair unsigned integers (period and duty cycle), separated by a |
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single space.
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