| # Copyright (c), 2023 Basalte bv |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: | |
| 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>; |
| }; |
| }; |
| }; |
| |
| compatible: "nxp,sc18im704" |
| |
| include: uart-device.yaml |
| |
| properties: |
| reset-gpios: |
| type: phandle-array |
| description: |
| Driver reset pin of the bridge. |
| If connected directly to the MCU, this pin should be configured |
| as active low. |
| |
| target-speed: |
| type: int |
| description: |
| UART baudrate which will be requested and to which |
| UART interface will be reconfigured during initialization phase. |
| enum: |
| - 1200 |
| - 2400 |
| - 4800 |
| - 9600 |
| - 14400 |
| - 19200 |
| - 28800 |
| - 38400 |
| - 57600 |
| - 76800 |
| - 115200 |
| - 230400 |
| - 460800 |
| |
| bus: nxp,sc18im704 |
