nxp,sc18im704 (on uart bus)

Vendor: NXP Semiconductors N.V.

Description

These nodes are “nxp,sc18im704” bus nodes.

NXP SC18IM704 UART to I2C/GPIO bridge.

The SC18IM704 supports both an external I2C and GPIO controller. These
controllers have to be added to the Device Tree as children. While the
device itself has to be a child of a UART controller.

An example configuration:

&uart0 {
  status = "okay";
  pinctrl-0 = <&uart0_default>;
  pinctrl-names = "default";

  sc18im704: sc18im704 {
    compatible = "nxp,sc18im704";
    status = "okay";
    target-speed = <115200>;
    reset-gpios = <&gpio1 15 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;

    i2c_ext: sc18im704_i2c {
      compatible = "nxp,sc18im704-i2c";
      status = "okay";
      #address-cells = <1>;
      #size-cells = <0>;
    };

    gpio_ext: sc18im704_gpio {
      compatible = "nxp,sc18im704-gpio";
      status = "okay";
      gpio-controller;
      #gpio-cells = <2>;
      ngpios = <8>;
    };
  };
};

Properties

Properties not inherited from the base binding file.

Name

Type

Details

reset-gpios

phandle-array

Driver reset pin of the bridge. If connected directly to the MCU, this pin should be configured as active low.

target-speed

int

UART baudrate which will be requested and to which UART interface will be reconfigured during initialization phase.

Legal values: 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 76800, 115200, 230400, 460800