Documentation/devicetree/bindings/mfd/stmfx.txt

   1 STMicroelectonics Multi-Function eXpander (STMFX) Core bindings
   2
   3 ST Multi-Function eXpander (STMFX) is a slave controller using I2C for
   4 communication with the main MCU. Its main features are GPIO expansion, main
   5 MCU IDD measurement (IDD is the amount of current that flows through VDD) and
   6 resistive touchscreen controller.
   7
   8 Required properties:
   9 - compatible: should be "st,stmfx-0300".
  10 - reg: I2C slave address of the device.
  11 - interrupts: interrupt specifier triggered by MFX_IRQ_OUT signal.
  12   Please refer to ../interrupt-controller/interrupt.txt
  13
  14 Optional properties:
  15 - drive-open-drain: configure MFX_IRQ_OUT as open drain.
  16 - vdd-supply: phandle of the regulator supplying STMFX.
  17
  18 Example:
  19
  20         stmfx: stmfx@42 {
  21                 compatible = "st,stmfx-0300";
  22                 reg = <0x42>;
  23                 interrupts = <8 IRQ_TYPE_EDGE_RISING>;
  24                 interrupt-parent = <&gpioi>;
  25                 vdd-supply = <&v3v3>;
  26         };
  27
  28 Please refer to ../pinctrl/pinctrl-stmfx.txt for STMFX GPIO expander function bindings.