From: Amelie Delaunay Date: Thu, 9 May 2019 08:58:48 +0000 (+0200) Subject: dt-bindings: mfd: Add ST Multi-Function eXpander (STMFX) core bindings X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fb8c86911052ccd4011392f78a24991c55c0d172;p=openwrt%2Fstaging%2Fblogic.git 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: Amelie Delaunay Reviewed-by: Linus Walleij Reviewed-by: Rob Herring Signed-off-by: Lee Jones --- diff --git a/Documentation/devicetree/bindings/mfd/stmfx.txt b/Documentation/devicetree/bindings/mfd/stmfx.txt new file mode 100644 index 000000000000..f0c2f7fcf5c7 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/stmfx.txt @@ -0,0 +1,28 @@ +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.