Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt

File Facts

System

Linux kernel

Corpus path

Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt

Extension

.txt

Size

4715 bytes

Lines

188

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

1) Main node

   Required properties:

   - compatible: must be "ralink,rt3883-pci"

   - reg: specifies the physical base address of the controller and
     the length of the memory mapped region.

   - #address-cells: specifies the number of cells needed to encode an
     address. The value must be 1.

   - #size-cells: specifies the number of cells used to represent the size
     of an address. The value must be 1.

   - ranges: specifies the translation between child address space and parent
     address space

  Optional properties:

   - status: indicates the operational status of the device.
     Value must be either "disabled" or "okay".

2) Child nodes

   The main node must have two child nodes which describes the built-in
   interrupt controller and the PCI host bridge.

   a) Interrupt controller:

   Required properties:

   - interrupt-controller: identifies the node as an interrupt controller

   - #address-cells: specifies the number of cells needed to encode an
     address. The value must be 0. As such, 'interrupt-map' nodes do not
     have to specify a parent unit address.

   - #interrupt-cells: specifies the number of cells needed to encode an
     interrupt source. The value must be 1.

   - interrupts: specifies the interrupt source of the parent interrupt
     controller. The format of the interrupt specifier depends on the
     parent interrupt controller.

   b) PCI host bridge:

   Required properties:

   - #address-cells: specifies the number of cells needed to encode an
     address. The value must be 0.

   - #size-cells: specifies the number of cells used to represent the size
     of an address. The value must be 2.

   - #interrupt-cells: specifies the number of cells needed to encode an
     interrupt source. The value must be 1.

   - device_type: must be "pci"

   - bus-range: PCI bus numbers covered

   - ranges: specifies the ranges for the PCI memory and I/O regions

   - interrupt-map-mask,
   - interrupt-map: standard PCI properties to define the mapping of the
     PCI interface to interrupt numbers.

   The PCI host bridge node might have additional sub-nodes representing
   the onboard PCI devices/PCI slots. Each such sub-node must have the

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.