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. > -- > Jean Delvare Evgeniy Polyakov Only failure makes us experts. -- Theo de Raadt
