Documentation/i2c/busses/scx200_acb.rst

File Facts

System

Linux kernel

Corpus path

Documentation/i2c/busses/scx200_acb.rst

Extension

.rst

Size

1079 bytes

Lines

38

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

========================
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

Annotation

• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.