From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- Documentation/ABI/testing/sysfs-class-pwm | 88 +++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-pwm (limited to 'Documentation/ABI/testing/sysfs-class-pwm') diff --git a/Documentation/ABI/testing/sysfs-class-pwm b/Documentation/ABI/testing/sysfs-class-pwm new file mode 100644 index 000000000..0638c94d0 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-pwm @@ -0,0 +1,88 @@ +What: /sys/class/pwm/ +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + The pwm/ class sub-directory belongs to the Generic PWM + Framework and provides a sysfs interface for using PWM + channels. + +What: /sys/class/pwm/pwmchip/ +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + A /sys/class/pwm/pwmchipN directory is created for each + probed PWM controller/chip where N is the base of the + PWM chip. + +What: /sys/class/pwm/pwmchip/npwm +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + The number of PWM channels supported by the PWM chip. + +What: /sys/class/pwm/pwmchip/export +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Exports a PWM channel from the PWM chip for sysfs control. + Value is between 0 and /sys/class/pwm/pwmchipN/npwm - 1. + +What: /sys/class/pwm/pwmchip/unexport +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Unexports a PWM channel. + +What: /sys/class/pwm/pwmchip/pwmX +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + A /sys/class/pwm/pwmchipN/pwmX directory is created for + each exported PWM channel where X is the exported PWM + channel number. + +What: /sys/class/pwm/pwmchip/pwmX/period +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Sets the PWM signal period in nanoseconds. + +What: /sys/class/pwm/pwmchip/pwmX/duty_cycle +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Sets the PWM signal duty cycle in nanoseconds. + +What: /sys/class/pwm/pwmchip/pwmX/polarity +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Sets the output polarity of the PWM signal to "normal" or + "inversed". + +What: /sys/class/pwm/pwmchip/pwmX/enable +Date: May 2013 +KernelVersion: 3.11 +Contact: H Hartley Sweeten +Description: + Enable/disable the PWM signal. + 0 is disabled + 1 is enabled + +What: /sys/class/pwm/pwmchip/pwmX/capture +Date: June 2016 +KernelVersion: 4.8 +Contact: Lee Jones +Description: + Capture information about a PWM signal. The output format is a + pair unsigned integers (period and duty cycle), separated by a + single space. -- cgit v1.2.3