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Commit fb8c8691 authored by Amelie Delaunay's avatar Amelie Delaunay Committed by Lee Jones
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dt-bindings: mfd: Add ST Multi-Function eXpander (STMFX) core bindings 



This patch adds documentation of device tree bindings for the
STMicroelectronics Multi-Function eXpander (STMFX) MFD core.

Signed-off-by: default avatarAmelie Delaunay <amelie.delaunay@st.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent e93c9c99

Documentation/devicetree/bindings/mfd/stmfx.txt

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STMicroelectonics Multi-Function eXpander (STMFX) Core bindings



ST Multi-Function eXpander (STMFX) is a slave controller using I2C for

communication with the main MCU. Its main features are GPIO expansion, main

MCU IDD measurement (IDD is the amount of current that flows through VDD) and

resistive touchscreen controller.



Required properties:

- compatible: should be "st,stmfx-0300".

- reg: I2C slave address of the device.

- interrupts: interrupt specifier triggered by MFX_IRQ_OUT signal.

  Please refer to ../interrupt-controller/interrupt.txt



Optional properties:

- drive-open-drain: configure MFX_IRQ_OUT as open drain.

- vdd-supply: phandle of the regulator supplying STMFX.



Example:



	stmfx: stmfx@42 {

		compatible = "st,stmfx-0300";

		reg = <0x42>;

		interrupts = <8 IRQ_TYPE_EDGE_RISING>;

		interrupt-parent = <&gpioi>;

		vdd-supply = <&v3v3>;

	};



Please refer to ../pinctrl/pinctrl-stmfx.txt for STMFX GPIO expander function bindings.