9b36e723f4
Implement external I2C controller driver with NXP's SC18IM704 device. Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>
74 lines
1.6 KiB
YAML
74 lines
1.6 KiB
YAML
# Copyright (c), 2023 Basalte bv
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# SPDX-License-Identifier: Apache-2.0
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description: |
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NXP SC18IM704 UART to I2C/GPIO bridge.
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The SC18IM704 supports both an external I2C and GPIO controller. These
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controllers have to be added to the Device Tree as children. While the
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device itself has to be a child of a UART controller.
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An example configuration:
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&uart0 {
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status = "okay";
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pinctrl-0 = <&uart0_default>;
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pinctrl-names = "default";
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sc18im704: sc18im704 {
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compatible = "nxp,sc18im704";
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status = "okay";
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target-speed = <115200>;
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reset-gpios = <&gpio1 15 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
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i2c_ext: sc18im704_i2c {
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compatible = "nxp,sc18im704-i2c";
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status = "okay";
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#address-cells = <1>;
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#size-cells = <0>;
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};
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gpio_ext: sc18im704_gpio {
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compatible = "nxp,sc18im704-gpio";
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status = "okay";
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gpio-controller;
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#gpio-cells = <2>;
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ngpios = <8>;
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};
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};
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};
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compatible: "nxp,sc18im704"
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include: uart-device.yaml
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properties:
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reset-gpios:
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type: phandle-array
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description:
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Driver reset pin of the bridge.
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If connected directly to the MCU, this pin should be configured
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as active low.
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target-speed:
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type: int
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description:
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UART baudrate which will be requested and to which
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UART interface will be reconfigured during initialization phase.
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enum:
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- 1200
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- 2400
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- 4800
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- 9600
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- 14400
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- 19200
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- 28800
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- 38400
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- 57600
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- 76800
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- 115200
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- 230400
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- 460800
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bus: nxp,sc18im704
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