| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/spi/spi-gpio.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: SPI-GPIO |
| 8 | |
| 9 | maintainers: |
| 10 | - Rob Herring <robh@kernel.org> |
| 11 | |
| 12 | description: |
| 13 | This represents a group of 3-n GPIO lines used for bit-banged SPI on |
| 14 | dedicated GPIO lines. |
| 15 | |
| 16 | allOf: |
| 17 | - $ref: /schemas/spi/spi-controller.yaml# |
| 18 | |
| 19 | properties: |
| 20 | compatible: |
| 21 | const: spi-gpio |
| 22 | |
| 23 | sck-gpios: |
| 24 | description: GPIO spec for the SCK line to use |
| 25 | maxItems: 1 |
| 26 | |
| 27 | miso-gpios: |
| 28 | description: GPIO spec for the MISO line to use |
| 29 | maxItems: 1 |
| 30 | |
| 31 | mosi-gpios: |
| 32 | description: GPIO spec for the MOSI line to use |
| 33 | maxItems: 1 |
| 34 | |
| 35 | cs-gpios: |
| 36 | description: GPIOs to use for chipselect lines. |
| 37 | Not needed if num-chipselects = <0>. |
| 38 | minItems: 1 |
| 39 | maxItems: 1024 |
| 40 | |
| 41 | num-chipselects: |
| 42 | description: Number of chipselect lines. Should be <0> if a single device |
| 43 | with no chip select is connected. |
| 44 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 45 | |
| 46 | # Deprecated properties |
| 47 | gpio-sck: false |
| 48 | gpio-miso: false |
| 49 | gpio-mosi: false |
| 50 | |
| 51 | required: |
| 52 | - compatible |
| 53 | - num-chipselects |
| 54 | - sck-gpios |
| 55 | |
| 56 | unevaluatedProperties: false |
| 57 | |
| 58 | examples: |
| 59 | - | |
| 60 | spi { |
| 61 | compatible = "spi-gpio"; |
| 62 | #address-cells = <0x1>; |
| 63 | #size-cells = <0x0>; |
| 64 | |
| 65 | sck-gpios = <&gpio 95 0>; |
| 66 | miso-gpios = <&gpio 98 0>; |
| 67 | mosi-gpios = <&gpio 97 0>; |
| 68 | cs-gpios = <&gpio 125 0>; |
| 69 | num-chipselects = <1>; |
| 70 | |
| 71 | /* clients */ |
| 72 | }; |
| 73 | |
| 74 | ... |