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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879/* SPDX-License-Identifier: GPL-2.0-or-later *//* * PPS generator API kernel header * * Copyright (C) 2024 Rodolfo Giometti <giometti@enneenne.com> */
#ifndef LINUX_PPS_GEN_KERNEL_H#define LINUX_PPS_GEN_KERNEL_H
#include <linux/pps_gen.h>#include <linux/cdev.h>#include <linux/device.h>
/* * Global defines */
#define PPS_GEN_MAX_SOURCES 16 /* should be enough... */
struct pps_gen_device;
/** * struct pps_gen_source_info - the specific PPS generator info * @use_system_clock: true, if the system clock is used to generate pulses * @get_time: query the time stored into the generator clock * @enable: enable/disable the PPS pulses generation * * This is the main generator struct where all needed information must be * placed before calling the pps_gen_register_source(). */struct pps_gen_source_info { bool use_system_clock;
int (*get_time)(struct pps_gen_device *pps_gen, struct timespec64 *time); int (*enable)(struct pps_gen_device *pps_gen, bool enable);
/* private: internal use only */ struct module *owner; struct device *parent; /* for device_create */};
/* The main struct */struct pps_gen_device { const struct pps_gen_source_info *info; /* PSS generator info */ bool enabled; /* PSS generator status */
unsigned int event; unsigned int sequence;
unsigned int last_ev; /* last PPS event id */ wait_queue_head_t queue; /* PPS event queue */
unsigned int id; /* PPS generator unique ID */ struct cdev cdev; struct device *dev; struct fasync_struct *async_queue; /* fasync method */ spinlock_t lock;};
/* * Global variables */
extern const struct attribute_group *pps_gen_groups[];
/* * Exported functions */
extern struct pps_gen_device *pps_gen_register_source( const struct pps_gen_source_info *info);extern void pps_gen_unregister_source(struct pps_gen_device *pps_gen);extern void pps_gen_event(struct pps_gen_device *pps_gen, unsigned int event, void *data);
#endif /* LINUX_PPS_GEN_KERNEL_H */