On Mon, 31 Jan 2005 11:06:56 -0600 Frank Beesley <frank.beesley at aeroflex.com> wrote: > Evgeniy Polyakov wrote: > > >On Mon, 31 Jan 2005 17:11:06 +0100 (CET) > >"Jean Delvare" <khali at linux-fr.org> wrote: > > > > > > > >>Hi Frank, > >> > >> > >> > >>>I am now looking at the one-wire drivers and see some issues coming up > >>>already. Our one-wire devices (DS2401s and DS18B20s) are connected > >>>through a CPLD at ISA port 0x304. I am looking at the matrox driver > >>>since it has a port to access through. Under the linux documentation > >>>(Linux 2.6.9) I can't find anything on one-wire devices. Is there some > >>>docs somewhere that discusses how to use these w1 modules. I believe I > >>>need w1 and w1_therm to start with but I don't see how everything needs > >>>to tie together. > >>> > >>> > >>I as said, Evgeniy Polyakov (CC'd) is the right person for that kind of > >>questions. My personal knowledge about one-wire is void. > >> > >> > > > >Hello, Frank, Jean. > > > >ds2401 and ds18*20 are supported by w1_smem and w1_therm drivers. > >So you need to create so called w1 bus master device - it is a driver > >that drives the actual physicall bus and reports to the w1 core > >about this process. Actually it is w1 core that drives the bus using > >callbaks provided by w1 bus master driver. > > > >Since you use ISA port based access then the easiest way is to implement > >only bit operations and register bus master with the w1 core. > > > >You can use matrox_w1 driver and recently included sc_w1 driver(w1 over SuperIO GPIO) > >driver as examples. > > > >Documenting all created cruft has a very high priority for me, bits of > >generic information about w1 already exist in Documentation/w1. > > > >I wish you success in this implementation. > > > > > > > Ok, now I feel stupid or blind but I can't find a directory under > Documentation called w1 and a "find" does not find sc_w1.c or sw_gpio.c. > I currently have kernel 2.6.9 but also looked at the standard 2.6.10 > download. Is the superio and documentation in an individuals patch set > or am I missing something. superio has appeared in the latest -mm patchset. w1 documentation a bit earlier - it exists in the 2.6.11-rc2 patchset. > Thanks again. Evgeniy Polyakov Only failure makes us experts. -- Theo de Raadt
