diff options
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-mmio.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-mmio.yaml | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml b/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml index b394e058256e..b4d55bf6a285 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml +++ b/Documentation/devicetree/bindings/gpio/gpio-mmio.yaml @@ -22,6 +22,7 @@ properties: - brcm,bcm6345-gpio - ni,169445-nand-gpio - wd,mbl-gpio # Western Digital MyBook Live memory-mapped GPIO controller + - intel,ixp4xx-expansion-bus-mmio-gpio big-endian: true @@ -37,7 +38,8 @@ properties: description: A list of registers in the controller. The width of each register is determined by its size. All registers must have the same width. The number - of GPIOs is set by the width, with bit 0 corresponding to GPIO 0. + of GPIOs is set by the width, with bit 0 corresponding to GPIO 0, unless + the ngpios property further restricts the number of used lines. items: - description: Register to READ the value of the GPIO lines. If GPIO line is high, @@ -74,11 +76,34 @@ properties: native-endian: true + ngpios: + minimum: 1 + maximum: 63 + description: + If this property is present the number of usable GPIO lines are restricted + to the first 0 .. ngpios lines. This is useful when the GPIO MMIO register + has 32 bits for GPIO but only the first 12 are actually connected to + real electronics, and then we set ngpios to 12. + no-output: $ref: /schemas/types.yaml#/definitions/flag description: If this property is present, the controller cannot drive the GPIO lines. +if: + properties: + compatible: + contains: + const: intel,ixp4xx-expansion-bus-mmio-gpio +then: + $ref: /schemas/memory-controllers/intel,ixp4xx-expansion-peripheral-props.yaml# + +patternProperties: + "^.+-hog(-[0-9]+)?$": + type: object + required: + - gpio-hog + required: - compatible - reg @@ -86,7 +111,7 @@ required: - '#gpio-cells' - gpio-controller -additionalProperties: false +unevaluatedProperties: false examples: - | @@ -111,7 +136,27 @@ examples: compatible = "brcm,bcm6345-gpio"; reg-names = "dirout", "dat"; reg = <0xfffe0406 2>, <0xfffe040a 2>; + ngpios = <15>; native-endian; gpio-controller; #gpio-cells = <2>; }; + + bus@c4000000 { + compatible = "intel,ixp42x-expansion-bus-controller", "syscon"; + reg = <0xc4000000 0x30>; + native-endian; + #address-cells = <2>; + #size-cells = <1>; + ranges = <0 0x0 0x50000000 0x01000000>; + dma-ranges = <0 0x0 0x50000000 0x01000000>; + gpio@1,0 { + compatible = "intel,ixp4xx-expansion-bus-mmio-gpio"; + gpio-controller; + #gpio-cells = <2>; + big-endian; + reg = <1 0x00000000 0x2>; + reg-names = "dat"; + intel,ixp4xx-eb-write-enable = <1>; + }; + }; |