Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
#ifndef _UAPI_PWM_H_#define _UAPI_PWM_H_
#include <linux/ioctl.h>#include <linux/types.h>
/** * struct pwmchip_waveform - Describe a PWM waveform for a pwm_chip's PWM channel * @hwpwm: per-chip relative index of the PWM device * @__pad: padding, must be zero * @period_length_ns: duration of the repeating period. * A value of 0 represents a disabled PWM. * @duty_length_ns: duration of the active part in each period * @duty_offset_ns: offset of the rising edge from a period's start */struct pwmchip_waveform { __u32 hwpwm; __u32 __pad; __u64 period_length_ns; __u64 duty_length_ns; __u64 duty_offset_ns;};
/* Reserves the passed hwpwm for exclusive control. */#define PWM_IOCTL_REQUEST _IO(0x75, 1)
/* counter part to PWM_IOCTL_REQUEST */#define PWM_IOCTL_FREE _IO(0x75, 2)
/* * Modifies the passed wf according to hardware constraints. All parameters are * rounded down to the next possible value, unless there is no such value, then * values are rounded up. Note that zero isn't considered for rounding down * period_length_ns. */#define PWM_IOCTL_ROUNDWF _IOWR(0x75, 3, struct pwmchip_waveform)
/* Get the currently implemented waveform */#define PWM_IOCTL_GETWF _IOWR(0x75, 4, struct pwmchip_waveform)
/* Like PWM_IOCTL_ROUNDWF + PWM_IOCTL_SETEXACTWF in one go. */#define PWM_IOCTL_SETROUNDEDWF _IOW(0x75, 5, struct pwmchip_waveform)
/* * Program the PWM to emit exactly the passed waveform, subject only to rounding * down each value less than 1 ns. Returns 0 on success, -EDOM if the waveform * cannot be implemented exactly, or other negative error codes. */#define PWM_IOCTL_SETEXACTWF _IOW(0x75, 6, struct pwmchip_waveform)
#endif /* _UAPI_PWM_H_ */