# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/st,stmfx.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectonics Multi-Function eXpander (STMFX) bindings
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description: ST Multi-Function eXpander (STMFX) is a slave controller using I2C for
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communication with the main MCU. Its main features are GPIO expansion,
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main MCU IDD measurement (IDD is the amount of current that flows
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through VDD) and resistive touchscreen controller.
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maintainers:
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- Amelie Delaunay <amelie.delaunay@st.com>
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properties:
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compatible:
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const: st,stmfx-0300
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reg:
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enum: [ 0x42, 0x43 ]
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interrupts:
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maxItems: 1
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drive-open-drain: true
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vdd-supply:
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maxItems: 1
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pinctrl:
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type: object
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properties:
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compatible:
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const: st,stmfx-0300-pinctrl
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"#gpio-cells":
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const: 2
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"#interrupt-cells":
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const: 2
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gpio-controller: true
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interrupt-controller: true
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gpio-ranges:
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description: if all STMFX pins[24:0] are available (no other STMFX function in use),
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you should use gpio-ranges = <&stmfx_pinctrl 0 0 24>;
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if agpio[3:0] are not available (STMFX Touchscreen function in use),
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you should use gpio-ranges = <&stmfx_pinctrl 0 0 16>, <&stmfx_pinctrl 20 20 4>;
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if agpio[7:4] are not available (STMFX IDD function in use),
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you should use gpio-ranges = <&stmfx_pinctrl 0 0 20>;
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maxItems: 1
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patternProperties:
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"^[a-zA-Z]*-pins$":
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type: object
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allOf:
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- $ref: ../pinctrl/pinmux-node.yaml
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properties:
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pins: true
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bias-disable: true
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bias-pull-up: true
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bias-pull-pin-default: true
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bias-pull-down: true
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drive-open-drain: true
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drive-push-pull: true
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output-high: true
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output-low: true
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additionalProperties: false
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required:
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- compatible
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- "#gpio-cells"
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- "#interrupt-cells"
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- gpio-controller
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- interrupt-controller
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- gpio-ranges
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additionalProperties: false
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required:
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- compatible
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- reg
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- interrupts
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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stmfx@42 {
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compatible = "st,stmfx-0300";
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reg = <0x42>;
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interrupts = <8 IRQ_TYPE_EDGE_RISING>;
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interrupt-parent = <&gpioi>;
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vdd-supply = <&v3v3>;
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stmfx_pinctrl: pinctrl {
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compatible = "st,stmfx-0300-pinctrl";
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#gpio-cells = <2>;
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#interrupt-cells = <2>;
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gpio-controller;
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interrupt-controller;
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gpio-ranges = <&stmfx_pinctrl 0 0 24>;
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joystick_pins: joystick-pins {
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pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4";
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drive-push-pull;
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bias-pull-up;
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};
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};
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};
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};
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...
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