Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | Any w1 device must be connected to w1 bus master device - for example |
2 | ds9490 usb device or w1-over-GPIO or RS232 converter. | |
3 | Driver for w1 bus master must provide several functions(you can find | |
4 | them in struct w1_bus_master definition in w1.h) which then will be | |
5 | called by w1 core to send various commands over w1 bus(by default it is | |
6 | reset and search commands). When some device is found on the bus, w1 core | |
7 | checks if driver for it's family is loaded. | |
8 | If driver is loaded w1 core creates new w1_slave object and registers it | |
9 | in the system(creates some generic sysfs files(struct w1_family_ops in | |
10 | w1_family.h), notifies any registered listener and so on...). | |
11 | It is device driver's business to provide any communication method | |
12 | upstream. | |
13 | For example w1_therm driver(ds18?20 thermal sensor family driver) | |
14 | provides temperature reading function which is bound to ->rbin() method | |
15 | of the above w1_family_ops structure. | |
16 | w1_smem - driver for simple 64bit memory cell provides ID reading | |
17 | method. | |
18 | ||
19 | You can call above methods by reading appropriate sysfs files. |