From: Vincent Jardin <[email protected]> The LX2160A muxes its IIC, XSPI, SDHC, UART, IRQ and EVT pads from fields of the RCW: read-only in RCWSR12..14 of DCFG, changed at runtime through the override registers of its DCSR view.
Describe the pad mux as a node without registers, a child of DCFG: one group per RCW field, one function per encoding. Signed-off-by: Vincent Jardin <[email protected]> --- .../bindings/pinctrl/fsl,lx2160a-rcw-pinmux.yaml | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,lx2160a-rcw-pinmux.yaml b/Documentation/devicetree/bindings/pinctrl/fsl,lx2160a-rcw-pinmux.yaml new file mode 100644 index 000000000000..d79edcb077f8 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/fsl,lx2160a-rcw-pinmux.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/fsl,lx2160a-rcw-pinmux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP LX2160A RCW pad muxes + +maintainers: + - Vincent Jardin <[email protected]> + +description: + The LX2160A muxes its IIC, XSPI, SDHC, UART, IRQ and EVT pads based on its + RCW. The related fields are from the read-only RCWSR12 to RCWSR14 registers + of DCFG, and changed at runtime by writing the RCW override registers in + the DCSR view of DCFG. The node is a child of the DCFG node, which owns both + views, and needs no registers of its own. A pad group is one field, named + from its pads. A board selects a state of its own with the usual + pinctrl-0 on this node, a hog. + +properties: + compatible: + const: fsl,lx2160a-rcw-pinmux + +patternProperties: + '-pins$': + type: object + $ref: pinmux-node.yaml# + additionalProperties: false + + properties: + function: + enum: [ asleep, can, evt, flexspi, flextimer, gpio, i2c, irq, + reset-req, sdhc, sdhc-clk, sdhc-data, sdhc-data4, sdhc-spi, + spi, uart, uart3, uart4 ] + + groups: + items: + enum: [ iic1, iic2, iic3, iic4, iic5, iic6, xspi1-data74, + xspi1-data30, xspi1-base, sdhc1-base, sdhc1-dir, + sdhc2-data74, sdhc2-base, uart1-soutsin, uart1-rtscts, + uart2-soutsin, uart2-rtscts, irq11-8, irq7-4, irq3-0, + evt4-3, evt2-0, clk-out, asleep, reset-req ] + + required: + - function + - groups + +required: + - compatible + +allOf: + - $ref: pinctrl.yaml# + +unevaluatedProperties: false + +examples: + - | + pinctrl { + compatible = "fsl,lx2160a-rcw-pinmux"; + + iic3-i2c-pins { + function = "i2c"; + groups = "iic3"; + }; + + iic3-gpio-pins { + function = "gpio"; + groups = "iic3"; + }; + }; -- 2.43.0
