Scroll to navigation

STRUCT W1_MASTER(9) W1 API internal to the kernel STRUCT W1_MASTER(9)

NAME

struct_w1_master - one per bus master

SYNOPSIS

struct w1_master {


  struct list_head w1_master_entry;


  struct module * owner;


  unsigned char name[W1_MAXNAMELEN];


  struct mutex list_mutex;


  struct list_head slist;


  struct list_head async_list;


  int max_slave_count;


  int slave_count;


  unsigned long attempts;


  int slave_ttl;


  int initialized;


  u32 id;


  int search_count;


  u64 search_id;


  atomic_t refcnt;


  void * priv;


  int enable_pullup;


  int pullup_duration;


  long flags;


  struct task_struct * thread;


  struct mutex mutex;


  struct mutex bus_mutex;


  struct device_driver * driver;


  struct device dev;


  struct w1_bus_master * bus_master;


  u32 seq;
};

MEMBERS

w1_master_entry

master linked list

owner

module owner

name[W1_MAXNAMELEN]

dynamically allocate bus name

list_mutex

protect slist and async_list

slist

linked list of slaves

async_list

linked list of netlink commands to execute

max_slave_count

maximum number of slaves to search for at a time

slave_count

current number of slaves known

attempts

number of searches ran

slave_ttl

number of searches before a slave is timed out

initialized

prevent init/removal race conditions

id

w1 bus number

search_count

number of automatic searches to run, -1 unlimited

search_id

allows continuing a search

refcnt

reference count

priv

private data storage

enable_pullup

allows a strong pullup

pullup_duration

time for the next strong pullup

flags

one of w1_master_flags

thread

thread for bus search and netlink commands

mutex

protect most of w1_master

bus_mutex

pretect concurrent bus access

driver

sysfs driver

dev

sysfs device

bus_master

io operations available

seq

sequence number used for netlink broadcasts

AUTHOR

David Fries <David@Fries.net>

Author.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.