1*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun%YAML 1.2 3*4882a593Smuzhiyun--- 4*4882a593Smuzhiyun$id: http://devicetree.org/schemas/spi/spi-gpio.yaml# 5*4882a593Smuzhiyun$schema: http://devicetree.org/meta-schemas/core.yaml# 6*4882a593Smuzhiyun 7*4882a593Smuzhiyuntitle: SPI-GPIO devicetree bindings 8*4882a593Smuzhiyun 9*4882a593Smuzhiyunmaintainers: 10*4882a593Smuzhiyun - Rob Herring <robh@kernel.org> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyundescription: 13*4882a593Smuzhiyun This represents a group of 3-n GPIO lines used for bit-banged SPI on 14*4882a593Smuzhiyun dedicated GPIO lines. 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunallOf: 17*4882a593Smuzhiyun - $ref: "/schemas/spi/spi-controller.yaml#" 18*4882a593Smuzhiyun 19*4882a593Smuzhiyunproperties: 20*4882a593Smuzhiyun compatible: 21*4882a593Smuzhiyun const: spi-gpio 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun sck-gpios: 24*4882a593Smuzhiyun description: GPIO spec for the SCK line to use 25*4882a593Smuzhiyun maxItems: 1 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun miso-gpios: 28*4882a593Smuzhiyun description: GPIO spec for the MISO line to use 29*4882a593Smuzhiyun maxItems: 1 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun mosi-gpios: 32*4882a593Smuzhiyun description: GPIO spec for the MOSI line to use 33*4882a593Smuzhiyun maxItems: 1 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun cs-gpios: 36*4882a593Smuzhiyun description: GPIOs to use for chipselect lines. 37*4882a593Smuzhiyun Not needed if num-chipselects = <0>. 38*4882a593Smuzhiyun minItems: 1 39*4882a593Smuzhiyun maxItems: 1024 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun num-chipselects: 42*4882a593Smuzhiyun description: Number of chipselect lines. Should be <0> if a single device 43*4882a593Smuzhiyun with no chip select is connected. 44*4882a593Smuzhiyun $ref: "/schemas/types.yaml#/definitions/uint32" 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun # Deprecated properties 47*4882a593Smuzhiyun gpio-sck: false 48*4882a593Smuzhiyun gpio-miso: false 49*4882a593Smuzhiyun gpio-mosi: false 50*4882a593Smuzhiyun 51*4882a593Smuzhiyunrequired: 52*4882a593Smuzhiyun - compatible 53*4882a593Smuzhiyun - num-chipselects 54*4882a593Smuzhiyun - sck-gpios 55*4882a593Smuzhiyun 56*4882a593SmuzhiyununevaluatedProperties: false 57*4882a593Smuzhiyun 58*4882a593Smuzhiyunexamples: 59*4882a593Smuzhiyun - | 60*4882a593Smuzhiyun spi { 61*4882a593Smuzhiyun compatible = "spi-gpio"; 62*4882a593Smuzhiyun #address-cells = <0x1>; 63*4882a593Smuzhiyun #size-cells = <0x0>; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun sck-gpios = <&gpio 95 0>; 66*4882a593Smuzhiyun miso-gpios = <&gpio 98 0>; 67*4882a593Smuzhiyun mosi-gpios = <&gpio 97 0>; 68*4882a593Smuzhiyun cs-gpios = <&gpio 125 0>; 69*4882a593Smuzhiyun num-chipselects = <1>; 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun /* clients */ 72*4882a593Smuzhiyun }; 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun... 75