Documentation/w1/w1-generic.rst

2 Introduction to the 1-wire (w1) subsystem
5 The 1-wire bus is a simple master-slave bus that communicates via a single
6 signal wire (plus ground, so two wires).
18     - DS9490 usb device
19     - W1-over-GPIO
20     - DS2482 (i2c to w1 bridge)
21     - Emulated devices, such as a RS232 converter, parallel port adapter, etc
25 ------------------------------
29  - sysfs entries for that w1 master are created
30  - the w1 bus is periodically searched for new slave devices
34 If there is no driver for the family, default one is assigned, which allows to perform
36 in nature, which can contain several (two or one) low-level operations.
37 Let's see how one can read EEPROM context:
38 1. one must write control buffer, i.e. buffer containing command byte
41 Then provided control buffer is being written to the wire.
50 ------------------
60   - (ds18?20 thermal sensor family driver)
61     provides temperature reading function which is bound to ->rbin() method
65   - driver for simple 64bit memory cell provides ID reading method.
71 -----------------------------------------------
78 Devices that support the 1-wire natively must provide the ability to write and
81 Most hardware provides higher-level functions that offload w1 handling.
86 -------------------------
89 <xx-xxxxxxxxxxxx>         A directory for a found device. The format is
90                           family-serial
100                           -1=continual (default)
102 w1_master_slaves          (ro) the names of the slaves, one per line
118 w1_master_search remains greater than 0 or is -1.  Each search attempt
123 ------------------------