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Add documentation and example for dt-bindings EL15203000. LED board (aka RED LED board) from Crane Merchandising Systems. Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
70 lines
1.7 KiB
Plaintext
70 lines
1.7 KiB
Plaintext
Crane Merchandising System - EL15203000 LED driver
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--------------------------------------------------
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This LED Board (aka RED LEDs board) is widely used in
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coffee vending machines produced by Crane Merchandising Systems.
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The board manages 3 LEDs and supports predefined blinking patterns
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for specific leds.
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Vending area LED encoded with symbol 'V' (hex code 0x56).
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Doesn't have any hardware blinking pattern.
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Screen light tube LED which surrounds vending machine screen and
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encoded with symbol 'S' (hex code 0x53). Supports blinking breathing pattern.
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Water Pipe LED encoded with symbol 'P' (hex code 0x50) and
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actually consists of 5 LEDs that exposed by protocol like one LED.
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Supports next patterns:
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- cascade pattern
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- inversed cascade pattern
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- bounce pattern
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- inversed bounce pattern
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Required properties:
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- compatible : "crane,el15203000"
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- #address-cells : must be 1
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- #size-cells : must be 0
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Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
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apply. In particular, "reg" and "spi-max-frequency" properties must be given.
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Optional LED sub-node properties:
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- function:
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see Documentation/devicetree/bindings/leds/common.txt
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- color:
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see Documentation/devicetree/bindings/leds/common.txt
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Example
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-------
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#include <dt-bindings/leds/common.h>
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led-controller@0 {
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compatible = "crane,el15203000";
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reg = <0>;
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spi-max-frequency = <50000>;
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#address-cells = <1>;
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#size-cells = <0>;
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/* water pipe */
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led@50 {
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reg = <0x50>;
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function = "pipe";
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color = <LED_COLOR_ID_RED>;
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};
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/* screen frame */
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led@53 {
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reg = <0x53>;
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function = "screen";
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color = <LED_COLOR_ID_RED>;
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};
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/* vending area */
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led@56 {
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reg = <0x56>;
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function = "vend";
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color = <LED_COLOR_ID_RED>;
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};
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};
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