Documentation/devicetree/bindings/leds/leds-el15203000.txt

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/leds/leds-el15203000.txt

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System
Linux kernel
Corpus path
Documentation/devicetree/bindings/leds/leds-el15203000.txt
Extension
.txt
Size
1731 bytes
Lines
70
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.

Dependency Surface

Detected Declarations

Annotated Snippet

Crane Merchandising System - EL15203000 LED driver
--------------------------------------------------

This LED Board (aka RED LEDs board) is widely used in
coffee vending machines produced by Crane Merchandising Systems.
The board manages 3 LEDs and supports predefined blinking patterns
for specific leds.

Vending area LED encoded with symbol 'V' (hex code 0x56).
Doesn't have any hardware blinking pattern.

Screen light tube LED which surrounds vending machine screen and
encoded with symbol 'S' (hex code 0x53). Supports blinking breathing pattern.

Water Pipe LED encoded with symbol 'P' (hex code 0x50) and
actually consists of 5 LEDs that exposed by protocol like one LED.
Supports next patterns:
- cascade pattern
- inversed cascade pattern
- bounce pattern
- inversed bounce pattern

Required properties:
- compatible : "crane,el15203000"
- #address-cells : must be 1
- #size-cells : must be 0

Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
apply. In particular, "reg" and "spi-max-frequency" properties must be given.

Optional LED sub-node properties:
- function:
	see Documentation/devicetree/bindings/leds/common.txt
- color:
	see Documentation/devicetree/bindings/leds/common.txt

Example
-------

#include <dt-bindings/leds/common.h>

led-controller@0 {
	compatible = "crane,el15203000";
	reg = <0>;
	spi-max-frequency = <50000>;
	#address-cells = <1>;
	#size-cells = <0>;

	/* water pipe */
	led@50 {
		reg = <0x50>;
		function = "pipe";
		color = <LED_COLOR_ID_RED>;
	};

	/* screen frame */
	led@53 {
		reg = <0x53>;
		function = "screen";
		color = <LED_COLOR_ID_RED>;
	};

	/* vending area */
	led@56 {
		reg = <0x56>;
		function = "vend";
		color = <LED_COLOR_ID_RED>;
	};
};

Annotation

Implementation Notes