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Signed-off-by: Corentin Guillevic --- .../bindings/leds/leds-tlc5928.yaml | 212 ++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-tlc5928.yaml diff --git a/Documentation/devicetree/bindings/leds/leds-tlc5928.yaml b/Documentation/devicetree/bindings/leds/leds-tlc5928.yaml new file mode 100644 index 000000000000..0d857c9b1feb --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-tlc5928.yaml @@ -0,0 +1,212 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/leds-tlc5928.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LED driver for TLC5928 from Texas Instruments. + +maintainers: + - Corentin Guillevic + +description: | + The TLC5928 is a LED controller handling up to 16 LEDs. It can + control LED on/off using a SPI-compatible interface, and has an + on/off control data shift register (blank) and data latch. + + This driver also supports the daisy-chaining of several TLC5928 + chips, as illustrated by the diagram below (with two controllers): + + +--------------+ +--------------+ + | SCLK|-----+---->|SCLK BLANK|-- + | | | | | + | SPI MOSI|-----|---->|MOSI TLC5928 | + | Master | | | (1) | + | MISO|<--+ | +--|MISO | + | | | | | | | + | CS/LATCH|-+-|-|--|->|LATCH | + +--------------+ | | | | +--------------+ + | | | | +--------------+ + | | +--|->|SCLK BLANK|-- + | | | | | + | | +->|MOSI TLC5928 | + | | | (2) | + | +-------|MISO | + | | | + +-------->|LATCH | + +--------------+ + + For more product information please see the link below: + https://www.ti.com/product/TLC5928/part-details/TLC5928PWPR + +properties: + compatible: + const: ti,tlc5928 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + reg: + maxItems: 1 + description: + SPI slave address + + enable-gpios: + description: | + Array of GPIO specifiers, referring to the GPIO pins to enable/disable + each device (active high to disable). In the daisy chain case, each + GPIO has to be in the same sequence than the devices. + + latch-gpio: + maxItems: 1 + description: Latch GPIO (SPI chip select) + +patternProperties: + "^spi-chip@[0-9]$": + type: object + unevaluatedProperties: false + description: Properties for a TLC5928 controller. + + properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + patternProperties: + + "^led@[0-9a-f]+$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + description: + Properties for a single LED. + + properties: + reg: + description: Index of the LED. + minimum: 0 + maximum: 15 + + required: + - reg + + required: + - "#address-cells" + - "#size-cells" + +required: + - compatible + - reg + - latch-gpio + +unevaluatedProperties: false + +examples: + # Single controller + - | + #include + + tlc5928@0 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,tlc5928"; + reg = <0x0>; + + enable-gpios = <&gpiof 10 GPIO_ACTIVE_HIGH>; + latch-gpio = <&gpiof 3 GPIO_ACTIVE_HIGH>; + + spi-chip@0 { + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + label = "tlc5928:led0"; + led = ; + reg = <0x0>; + }; + + led@1 { + label = "tlc5928:led1"; + led = ; + reg = <0x1>; + }; + + led@f { + label = "tlc5928:led15"; + led = ; + reg = <0xf>; + }; + }; + }; + + # Two controllers, in daisy chain + - | + #include + + tlc5928@0 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,tlc5928"; + reg = <0x0>; + + enable-gpios = <&gpiof 10 GPIO_ACTIVE_HIGH>, /* OUT_EN_1 */ + <&gpiof 9 GPIO_ACTIVE_HIGH>; /* OUT_EN_2 */ + latch-gpio = <&gpiof 3 GPIO_ACTIVE_HIGH>; + + spi-chip@0 { + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + label = "tlc5928:0:led0"; + led = ; + reg = <0x0>; + }; + + led@1 { + label = "tlc5928:0:led1"; + led = ; + reg = <0x1>; + }; + + led@f { + label = "tlc5928:0:led15"; + led = ; + reg = <0xf>; + }; + }; + + spi-chip@1 { + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + label = "tlc5928:1:led0"; + led = ; + reg = <0x0>; + }; + + led@1 { + label = "tlc5928:1:led1"; + led = ; + reg = <0x1>; + }; + + led@2 { + label = "tlc5928:1:led2"; + led = ; + reg = <0x2>; + }; + + led@f { + label = "tlc5928:1:led15"; + led = ; + reg = <0xf>; + }; + }; + };