diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mc33xs2410.h | 16 | ||||
| -rw-r--r-- | include/linux/pwm.h | 5 | ||||
| -rw-r--r-- | include/uapi/linux/pwm.h | 53 |
3 files changed, 74 insertions, 0 deletions
diff --git a/include/linux/mc33xs2410.h b/include/linux/mc33xs2410.h new file mode 100644 index 000000000000..31c0edf10dd7 --- /dev/null +++ b/include/linux/mc33xs2410.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2024 Liebherr-Electronics and Drives GmbH + */ +#ifndef _MC33XS2410_H +#define _MC33XS2410_H + +#include <linux/spi/spi.h> + +MODULE_IMPORT_NS("PWM_MC33XS2410"); + +int mc33xs2410_read_reg_ctrl(struct spi_device *spi, u8 reg, u16 *val); +int mc33xs2410_read_reg_diag(struct spi_device *spi, u8 reg, u16 *val); +int mc33xs2410_modify_reg(struct spi_device *spi, u8 reg, u8 mask, u8 val); + +#endif /* _MC33XS2410_H */ diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 63a17d2b4ec8..8cafc483db53 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -2,6 +2,7 @@ #ifndef __LINUX_PWM_H #define __LINUX_PWM_H +#include <linux/cdev.h> #include <linux/device.h> #include <linux/err.h> #include <linux/module.h> @@ -273,6 +274,8 @@ struct pwm_capture { unsigned int duty_cycle; }; +#define PWM_WFHWSIZE 20 + /** * struct pwm_ops - PWM controller operations * @request: optional hook for requesting a PWM @@ -311,6 +314,7 @@ struct pwm_ops { /** * struct pwm_chip - abstract a PWM controller * @dev: device providing the PWMs + * @cdev: &struct cdev for this device * @ops: callbacks for this PWM controller * @owner: module providing this chip * @id: unique number of this PWM chip @@ -325,6 +329,7 @@ struct pwm_ops { */ struct pwm_chip { struct device dev; + struct cdev cdev; const struct pwm_ops *ops; struct module *owner; unsigned int id; diff --git a/include/uapi/linux/pwm.h b/include/uapi/linux/pwm.h new file mode 100644 index 000000000000..182d59cc07ee --- /dev/null +++ b/include/uapi/linux/pwm.h @@ -0,0 +1,53 @@ +/* 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_ */ |