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Merge tag 'pwm/for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux

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Pull pwm updates from Uwe Kleine-König:
 "Apart from the usual mix of new drivers (pwm-argon-fan-hat), adding
  support for variants to existing drivers, minor improvements to both
  drivers and docs, device tree documenation updates, the noteworthy
  changes are:

   - A hwmon companion driver to pwm-mc33xs2410 living in drivers/hwmon
     and acked by Guenter Roeck

   - chardev support for PWM devices. This leverages atomic PWM updates
     to userspace and at the same time simplifies and accelerates PWM
     configuration changes"

* tag 'pwm/for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux: (35 commits)
  pwm: raspberrypi-poe: Fix spelling mistake "Firwmware" -> "Firmware"
  hwmon: add support for MC33XS2410 hardware monitoring
  pwm: mc33xs2410: add hwmon support
  pwm: img: Remove redundant pm_runtime_mark_last_busy() calls
  pwm: Expose PWM_WFHWSIZE in public header
  dt-bindings: pwm: Convert lpc32xx-pwm.txt to yaml format
  docs: pwm: Adapt Locking paragraph to reality
  pwm: twl-led: Drop driver local locking
  pwm: sun4i: Drop driver local locking
  pwm: sti: Drop driver local locking
  pwm: microchip-core: Drop driver local locking
  pwm: lpc18xx-sct: Drop driver local locking
  pwm: fsl-ftm: Drop driver local locking
  pwm: clps711x: Drop driver local locking
  pwm: atmel: Drop driver local locking
  pwm: argon-fan-hat: Add Argon40 Fan HAT support
  dt-bindings: pwm: argon40,fan-hat: Document Argon40 Fan HAT
  dt-bindings: vendor-prefixes: Document Argon40
  pwm: pwm-mediatek: Add support for PWM IP V3.0.2 in MT6991/MT8196
  pwm: pwm-mediatek: Pass PWM_CK_26M_SEL from platform data
  ...
This commit is contained in:
Linus Torvalds
2025-07-28 23:17:46 -07:00
parent 0262163136 68b9272ca7
commit f38b751290
41 changed files with 1228 additions and 307 deletions
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include/uapi/linux/pwm.h
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/* 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_ */