| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/gpio/fairchild,74hc595.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Generic 8-bit shift register |
| |
| maintainers: |
| - Maxime Ripard <mripard@kernel.org> |
| |
| properties: |
| compatible: |
| enum: |
| - fairchild,74hc595 |
| - nxp,74lvc594 |
| |
| reg: |
| maxItems: 1 |
| |
| gpio-controller: true |
| |
| '#gpio-cells': |
| description: |
| The second cell is only used to specify the GPIO polarity. |
| const: 2 |
| |
| registers-number: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: Number of daisy-chained shift registers |
| |
| enable-gpios: |
| description: GPIO connected to the OE (Output Enable) pin. |
| maxItems: 1 |
| |
| patternProperties: |
| "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$": |
| type: object |
| required: |
| - gpio-hog |
| |
| required: |
| - compatible |
| - reg |
| - gpio-controller |
| - '#gpio-cells' |
| - registers-number |
| |
| allOf: |
| - $ref: /schemas/spi/spi-peripheral-props.yaml# |
| |
| unevaluatedProperties: false |
| |
| examples: |
| - | |
| spi { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| gpio5: gpio5@0 { |
| compatible = "fairchild,74hc595"; |
| reg = <0>; |
| gpio-controller; |
| #gpio-cells = <2>; |
| registers-number = <4>; |
| spi-max-frequency = <100000>; |
| }; |
| }; |