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/* SPDX-License-Identifier: GPL-2.0-or-later */
* Copyright (c) 2004 Evgeniy Polyakov <>
#ifndef __W1_H
#define __W1_H
#include <linux/w1.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#define W1_SLAVE_ACTIVE 0
#define W1_SLAVE_DETACH 1
* struct w1_async_cmd - execute callback from the w1_process kthread
* @async_entry: link entry
* @cb: callback function, must list_del and destroy this list before
* returning
* When inserted into the w1_master async_list, w1_process will execute
* the callback. Embed this into the structure with the command details.
struct w1_async_cmd {
struct list_head async_entry;
void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd);
int w1_create_master_attributes(struct w1_master *master);
void w1_destroy_master_attributes(struct w1_master *master);
void w1_search(struct w1_master *dev, u8 search_type,
w1_slave_found_callback cb);
void w1_search_devices(struct w1_master *dev, u8 search_type,
w1_slave_found_callback cb);
/* call w1_unref_slave to release the reference counts w1_search_slave added */
struct w1_slave *w1_search_slave(struct w1_reg_num *id);
* decrements the reference on sl->master and sl, and cleans up if zero
* returns the reference count after it has been decremented
int w1_unref_slave(struct w1_slave *sl);
void w1_slave_found(struct w1_master *dev, u64 rn);
void w1_search_process_cb(struct w1_master *dev, u8 search_type,
w1_slave_found_callback cb);
struct w1_slave *w1_slave_search_device(struct w1_master *dev,
struct w1_reg_num *rn);
struct w1_master *w1_search_master_id(u32 id);
/* Disconnect and reconnect devices in the given family. Used for finding
* unclaimed devices after a family has been registered or releasing devices
* after a family has been unregistered. Set attach to 1 when a new family
* has just been registered, to 0 when it has been unregistered.
void w1_reconnect_slaves(struct w1_family *f, int attach);
int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
/* 0 success, otherwise EBUSY */
int w1_slave_detach(struct w1_slave *sl);
void __w1_remove_master_device(struct w1_master *dev);
void w1_family_put(struct w1_family *f);
void __w1_family_get(struct w1_family *f);
struct w1_family *w1_family_registered(u8 fid);
extern struct device_driver w1_master_driver;
extern struct device w1_master_device;
extern int w1_max_slave_count;
extern int w1_max_slave_ttl;
extern struct list_head w1_masters;
extern struct mutex w1_mlock;
extern spinlock_t w1_flock;
int w1_process_callbacks(struct w1_master *dev);
int w1_process(void *data);
#endif /* __W1_H */