From: Amelie Delaunay <amelie.delaunay@st.com>
Date: Thu, 9 May 2019 08:58:48 +0000 (+0200)
Subject: dt-bindings: mfd: Add ST Multi-Function eXpander (STMFX) core bindings
X-Git-Tag: Ubuntu-5.10.0-12.13~5378^2~36^4~6
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=fb8c86911052ccd4011392f78a24991c55c0d172;p=mirror_ubuntu-hirsute-kernel.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 <amelie.delaunay@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

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.