w1/masters/omap-hdq.rst

2 Kernel driver for omap HDQ/1-wire module
7 HDQ/1-wire controller on the TI OMAP 2430/3430 platforms.
15 The HDQ/1-Wire module of TI OMAP2430/3430 platforms implement the hardware
17 Semiconductor 1-Wire protocols. These protocols use a single wire for
18 communication between the master (HDQ/1-Wire controller) and the slave
19 (HDQ/1-Wire external compliant device).
21 A typical application of the HDQ/1-Wire module is the communication with battery
24 The controller supports operation in both HDQ and 1-wire mode. The essential
25 difference between the HDQ and 1-wire mode is how the slave device responds to
27 create an initialization pulse to the slave.However, the slave can be reset by
28 using an initialization pulse (also referred to as a break pulse).The slave
29 does not respond with a presence pulse as it does in the 1-Wire protocol.
36 be used to calculate the CRC and pass back an appropriate slave ID to the W1
39 By default the master driver and the BQ slave i/f
42 that the ID used should be same for both master and slave driver loading.
49 The driver also supports 1-wire mode. In this mode, there is no need to
50 pass slave ID as parameter. The driver will auto-detect slaves connected
51 to the bus using SEARCH_ROM procedure. 1-wire mode can be selected by
53 Documentation/devicetree/bindings/w1/omap-hdq.txt for more details).