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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/w1/w1.generic | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/w1/w1.generic')
-rw-r--r-- | Documentation/w1/w1.generic | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/w1/w1.generic b/Documentation/w1/w1.generic new file mode 100644 index 0000000..eace304 --- /dev/null +++ b/Documentation/w1/w1.generic @@ -0,0 +1,19 @@ +Any w1 device must be connected to w1 bus master device - for example +ds9490 usb device or w1-over-GPIO or RS232 converter. +Driver for w1 bus master must provide several functions(you can find +them in struct w1_bus_master definition in w1.h) which then will be +called by w1 core to send various commands over w1 bus(by default it is +reset and search commands). When some device is found on the bus, w1 core +checks if driver for it's family is loaded. +If driver is loaded w1 core creates new w1_slave object and registers it +in the system(creates some generic sysfs files(struct w1_family_ops in +w1_family.h), notifies any registered listener and so on...). +It is device driver's business to provide any communication method +upstream. +For example w1_therm driver(ds18?20 thermal sensor family driver) +provides temperature reading function which is bound to ->rbin() method +of the above w1_family_ops structure. +w1_smem - driver for simple 64bit memory cell provides ID reading +method. + +You can call above methods by reading appropriate sysfs files. |