Documentation/leds/leds-mlxcpld.rst

Source file repositories/reference/linux-study-clean/Documentation/leds/leds-mlxcpld.rst

File Facts

System: Linux kernel
Corpus path: Documentation/leds/leds-mlxcpld.rst
Extension: .rst
Size: 2424 bytes
Lines: 119
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 for Mellanox systems LEDs
=======================================

Provide system LED support for the nex Mellanox systems:
"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
"msn2410", "msb7800", "msn2740", "msn2100".

Description
-----------
Driver provides the following LEDs for the systems "msx6710", "msx6720",
"msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":

  - mlxcpld:fan1:green
  - mlxcpld:fan1:red
  - mlxcpld:fan2:green
  - mlxcpld:fan2:red
  - mlxcpld:fan3:green
  - mlxcpld:fan3:red
  - mlxcpld:fan4:green
  - mlxcpld:fan4:red
  - mlxcpld:psu:green
  - mlxcpld:psu:red
  - mlxcpld:status:green
  - mlxcpld:status:red

 "status"
  - CPLD reg offset: 0x20
  - Bits [3:0]

 "psu"
  - CPLD reg offset: 0x20
  - Bits [7:4]

 "fan1"
  - CPLD reg offset: 0x21
  - Bits [3:0]

 "fan2"
  - CPLD reg offset: 0x21
  - Bits [7:4]

 "fan3"
  - CPLD reg offset: 0x22
  - Bits [3:0]

 "fan4"
  - CPLD reg offset: 0x22
  - Bits [7:4]

 Color mask for all the above LEDs:

  [bit3,bit2,bit1,bit0] or
  [bit7,bit6,bit5,bit4]:

	- [0,0,0,0] = LED OFF
	- [0,1,0,1] = Red static ON
	- [1,1,0,1] = Green static ON
	- [0,1,1,0] = Red blink 3Hz
	- [1,1,1,0] = Green blink 3Hz
	- [0,1,1,1] = Red blink 6Hz
	- [1,1,1,1] = Green blink 6Hz

Driver provides the following LEDs for the system "msn2100":

  - mlxcpld:fan:green
  - mlxcpld:fan:red
  - mlxcpld:psu1:green
  - mlxcpld:psu1:red
  - mlxcpld:psu2:green

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.