Add bindings documentation for the TLC5925 LED controller. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxxxxxxxxxxx> --- .../devicetree/bindings/leds/ti,tlc5925.yaml | 106 ++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/ti,tlc5925.yaml diff --git a/Documentation/devicetree/bindings/leds/ti,tlc5925.yaml b/Documentation/devicetree/bindings/leds/ti,tlc5925.yaml new file mode 100644 index 000000000000..379ade094fd3 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ti,tlc5925.yaml @@ -0,0 +1,106 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/ti,tlc5925.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: LEDs connected to TI TLC5925 controller + +maintainers: + - Jean-Jacques Hiblot <jjhiblot@xxxxxxxxxxxxxxx> + +description: | + The TLC5925 is a low-power 16-channel constant-current LED sink driver. + It is controlled through a SPI interface. + It is built around a shift register and latches which convert serial + input data into a parallel output. Several TLC5925 can be chained to + control more than 16 LEDs with a single chip-select. + The brightness level cannot be controlled, each LED is either on or off. + + Each LED is represented as a sub-node of the ti,tlc5925 device. + +$ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + const: ti,tlc5925 + + shift-register-length: + minimum: 8 + description: | + The length of the shift register. If several TLC5925 are chained, + shift_register_length should be set to 16 times the number of TLC5925. + The value must be a multiple of 8. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + output-enable-b-gpios: + description: | + Optional GPIO pins to enable/disable the parallel output. They describe + the GPIOs connected to the OE/ pin of the TLC5925s. + +patternProperties: + "@[0-9a-z]+$": + type: object + $ref: common.yaml# + + description: | + LED pin number (must be lower than shift_register_length). + The furthest LED down the chain has the pin number 0. + + properties: + reg: + minimum: 0 + + required: + - reg + +additionalProperties: true + +required: + - "#address-cells" + - "#size-cells" + - shift_register_length + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/leds/common.h> + + spi0 { + #address-cells = <1>; + #size-cells = <0>; + + leds@2 { + compatible = "ti,tlc5925"; + reg = <0x02>; + spi-max-frequency = <30000000>; + shift_register_length = <32>; + output-enable-b-gpios = <&gpio0b 9 GPIO_ACTIVE_HIGH>, <&gpio0b 7 GPIO_ACTIVE_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + + led@0 { + reg = <0>; + function = LED_FUNCTION_STATUS; + color = <LED_COLOR_ID_GREEN>; + }; + + led@4 { + reg = <4>; + function = LED_FUNCTION_STATUS; + color = <LED_COLOR_ID_RED>; + }; + + led@1f { + reg = <31>; + function = LED_FUNCTION_PANIC; + color = <LED_COLOR_ID_RED>; + }; + }; + + }; -- 2.25.1
