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It acts as a nexus that exposes a constrained set of I/O resources, such as GPIOs, clocks and interrupts, through fixed electrical wiring. All actual hardware providers reside on the base board. The connector node only defines index-based mappings to those providers. This connector type is present on i.MX95 19x19 EVK and i.MX952 EVK, where it is used to attach the IMX-AUD-IO audio expansion card[1]. The same add-on board can be reused across different base boards that carry this connector. [1]https://www.nxp.com/part/IMX-AUD-IO Signed-off-by: Chancel Liu --- .../bindings/connector/fsl,aud-io-slot.yaml | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml diff --git a/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml b/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml new file mode 100644 index 000000000000..6e1e3f1b6a33 --- /dev/null +++ b/Documentation/devicetree/bindings/connector/fsl,aud-io-slot.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/connector/fsl,aud-io-slot.yaml# +$schema: http://devicetree.org/meta-schemas/base.yaml# + +title: NXP AUD-IO Slot + +maintainers: + - Frank Li + - Chancel Liu + +description: + The NXP AUD-IO slot represents a physically present I/O connector on + the base board. It acts as a nexus that exposes a constrained set of + I/O resources, such as GPIOs, clocks and interrupts, through fixed + electrical wiring. All actual hardware providers reside on the base + board. The connector node only defines index-based mappings to those + providers. This connector type is present on i.MX95 19x19 EVK and + i.MX952 EVK, where it is used to attach the IMX-AUD-IO expansion card. + +properties: + compatible: + oneOf: + - items: + - enum: + - fsl,imx952-evk-aud-io + - const: fsl,imx95-19x19-evk-aud-io + - const: fsl,imx95-19x19-evk-aud-io + + '#gpio-cells': + const: 2 + + gpio-map: + minItems: 1 + maxItems: 3 + + gpio-map-mask: + items: + - const: 0xffffffff + - const: 0x0 + + gpio-map-pass-thru: + items: + - const: 0x0 + - const: 0xffffffff + + '#clock-cells': + const: 1 + + clock-map: + minItems: 1 + maxItems: 2 + + '#address-cells': + const: 0 + + '#interrupt-cells': + const: 2 + + interrupt-map: + minItems: 1 + maxItems: 2 + + interrupt-map-mask: + items: + - const: 0xffffffff + - const: 0x0 + +required: + - compatible + - '#gpio-cells' + - gpio-map + - gpio-map-mask + - gpio-map-pass-thru + +additionalProperties: false + +examples: + - | + #include + #include + + connector { + compatible = "fsl,imx95-19x19-evk-aud-io"; + #gpio-cells = <2>; + gpio-map = <0 0 &gpio1 8 GPIO_ACTIVE_LOW>; + gpio-map-mask = <0xffffffff 0x0>; + gpio-map-pass-thru = <0x0 0xffffffff>; + #clock-cells = <1>; + clock-map = <0 &clk 1>; + #address-cells = <0>; + #interrupt-cells = <2>; + interrupt-map-mask = <0xffffffff 0x0>; + interrupt-map = <0 0 &gpio2 27 IRQ_TYPE_LEVEL_LOW>; + }; -- 2.50.1