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Diffstat (limited to 'Documentation/i2c/busses/scx200_acb.rst')
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diff --git a/Documentation/i2c/busses/scx200_acb.rst b/Documentation/i2c/busses/scx200_acb.rst new file mode 100644 index 000000000000..8dc7c352508c --- /dev/null +++ b/Documentation/i2c/busses/scx200_acb.rst @@ -0,0 +1,37 @@ +======================== +Kernel driver scx200_acb +======================== + +Author: Christer Weinigel <wingel@nano-system.com> + +The driver supersedes the older, never merged driver named i2c-nscacb. + +Module Parameters +----------------- + +* 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 +a configuration file in /etc/modprobe.d/ instead:: + + options scx200_acb base=0x810,0x820 |