nxp,sc18im704 (on uart bus)

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

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nxp,sc18im704” compatible.

Name	Type	Details
`status`	`string`	indicates the operational status of a device Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	compatible strings This property is required. See Important properties for more information.
`reg`	`array`	register space See Important properties for more information.
`reg-names`	`string-array`	name of each register space
`interrupts`	`array`	interrupts for device See Important properties for more information.
`interrupts-extended`	`compound`	extended interrupt specifier for device
`interrupt-names`	`string-array`	name of each interrupt
`interrupt-parent`	`phandle`	phandle to interrupt controller node
`label`	`string`	No description provided for this label See Important properties for more information.
`clocks`	`phandle-array`	Clock gate information
`clock-names`	`string-array`	name of each clock
`#address-cells`	`int`	number of address cells in reg property
`#size-cells`	`int`	number of size cells in reg property
`dmas`	`phandle-array`	DMA channels specifiers
`dma-names`	`string-array`	Provided names of DMA channel specifiers
`io-channels`	`phandle-array`	IO channels specifiers
`io-channel-names`	`string-array`	Provided names of IO channel specifiers
`mboxes`	`phandle-array`	mailbox / IPM channels specifiers
`mbox-names`	`string-array`	Provided names of mailbox / IPM channel specifiers
`power-domains`	`phandle-array`	Power domain specifiers
`power-domain-names`	`string-array`	Provided names of power domain specifiers
`#power-domain-cells`	`int`	Number of cells in power-domains property
`zephyr,deferred-init`	`boolean`	Do not initialize device automatically on boot. Device should be manually initialized using device_init().
`wakeup-source`	`boolean`	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
`zephyr,pm-device-runtime-auto`	`boolean`	Automatically configure the device for runtime power management after the init function runs.
`zephyr,disabling-power-states`	`phandles`	List of power states that will disable this device power.