On Tue, Jun 14, 2022 at 05:42:43PM +0200, Jean-Jacques Hiblot wrote: > Add bindings documentation for the TLC5925 LED controller. > > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxxxxxxxxxxx> > --- > .../devicetree/bindings/leds/ti,tlc5925.yaml | 107 ++++++++++++++++++ > 1 file changed, 107 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..12a71e48f854 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/ti,tlc5925.yaml > @@ -0,0 +1,107 @@ > +# 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 > + > + ti,shift-register-length: > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 8 > + description: | Don't need '|' if no formatting to preserve. > + 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. multipleOf: 8 Though I'm confused why it's not 16. > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 0 > + > + output-enable-b-gpios: > + $ref: /schemas/types.yaml#/definitions/phandle-array Already has a type. > + description: | > + Optional GPIO pins to enable/disable the parallel output. They describe > + the GPIOs connected to the OE/ pin of the TLC5925s. > + > +patternProperties: > + "@[0-9a-f]+$": > + type: object > + $ref: common.yaml# unevaluatedProperties: false > + > + properties: > + reg: > + $ref: /schemas/types.yaml#/definitions/uint32 Don't need a type here. > + description: | > + LED pin number (must be lower than ti,shift-register-length). > + The furthest LED down the chain has the pin number 0. > + > + required: > + - reg > + > +required: > + - "#address-cells" > + - "#size-cells" > + - ti,shift-register-length Is there not a default when not chained? > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + #include <dt-bindings/leds/common.h> > + > + spi0 { spi { > + #address-cells = <1>; > + #size-cells = <0>; > + > + leds@2 { > + compatible = "ti,tlc5925"; > + reg = <0x02>; > + spi-max-frequency = <30000000>; > + ti,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 > >
