Hi Thomas, > I hope you don't mind the imposition, Jean Delvare (khali on > #linux-sensors) suggested I contact you about a geode driver that I need > to write. (He said you wanted to do something similar a while back.) That was Rudolf Marek who did, actually. > At the moment I am using an "adapter" driver for the SC1100 called > i2c-nscacb.c. It doesn't seem to have a maintainer, but it only had a > couple of little bug-fixes required, so once I'd done that it worked > perfectly. We have two drivers for similar boards in the kernel already: scx200_i2c and scx200_acb. I suspect that the latter is a replacement for the older, never merged i2c-nscacb driver you're using. This guess is backed up by this one-year old thread: http://lists.lm-sensors.org/pipermail/lm-sensors/2005-April/011756.html http://lists.lm-sensors.org/pipermail/lm-sensors/2005-May/012043.html > The driver that I wrote for the Atmel is basically a vanilla sensor > driver. (...) How does a microcontroller qualify as a sensor? And what do you mean with "vanilla"? I will merge the following documentation update for the scx200_acb driver, comments welcome. * * * * * Documentation update for the scx200_acb driver. Hopefully this should help future users. References: Support of i2c-nscacb (April, May 2005) http://lists.lm-sensors.org/pipermail/lm-sensors/2005-April/011756.html http://lists.lm-sensors.org/pipermail/lm-sensors/2005-May/012043.html making a geode i2c slave driver (April 2006) http://lists.lm-sensors.org/pipermail/lm-sensors/2006-April/015998.html Kernel bug #6445 http://bugzilla.kernel.org/show_bug.cgi?id=6445 Signed-off-by: Jean Delvare <khali at linux-fr.org> --- Documentation/i2c/busses/scx200_acb | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) --- linux-2.6.17-rc3.orig/Documentation/i2c/busses/scx200_acb 2006-04-03 20:12:23.000000000 +0200 +++ linux-2.6.17-rc3/Documentation/i2c/busses/scx200_acb 2006-04-28 10:45:30.000000000 +0200 @@ -2,14 +2,31 @@ Author: Christer Weinigel <wingel at nano-system.com> +The driver supersedes the older, never merged driver named i2c-nscacb. + Module Parameters ----------------- -* base: int +* base: up to 4 ints Base addresses for the ACCESS.bus controllers on SCx200 and SC1100 devices + By default the driver uses two base addresses 0x820 and 0x840. + If you want only one base address, specify the second as 0 so as to + override this default. + Description ----------- Enable the use of the ACCESS.bus controller on the Geode SCx200 and SC1100 processors and the CS5535 and CS5536 Geode companion devices. + +Device-specific notes +--------------------- + +The SC1100 WRAP boards are known to use base addresses 0x810 and 0x820. +If the scx200_acb driver is built into the kernel, add the following +parameter to your boot command line: + scx200_acb.base=0x810,0x820 +If the scx200_acb driver is built as a module, add the following line to +the file /etc/modprobe.conf instead: + options scx200_acb base=0x810,0x820 -- Jean Delvare
