From mboxrd@z Thu Jan 1 00:00:00 1970 From: amelie.delaunay@st.com (Amelie Delaunay) Date: Thu, 27 Sep 2018 13:39:58 +0200 Subject: [PATCH v3 1/7] dt-bindings: mfd: Add ST Multi-Function eXpander (STMFX) core bindings In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> Message-ID: <1538048404-9041-2-git-send-email-amelie.delaunay@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- Documentation/devicetree/bindings/mfd/stmfx.txt | 28 +++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/stmfx.txt diff --git a/Documentation/devicetree/bindings/mfd/stmfx.txt b/Documentation/devicetree/bindings/mfd/stmfx.txt new file mode 100644 index 0000000..f0c2f7f --- /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 at 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. -- 2.7.4