86 lines
2.2 KiB
YAML
86 lines
2.2 KiB
YAML
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
|
||
|
|
# Copyright 2019 BayLibre, SAS
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: "http://devicetree.org/schemas/serial/amlogic,meson-uart.yaml#"
|
||
|
|
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
|
||
|
|
|
||
|
|
title: Amlogic Meson SoC UART Serial Interface
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Neil Armstrong <neil.armstrong@linaro.org>
|
||
|
|
|
||
|
|
description: |
|
||
|
|
The Amlogic Meson SoC UART Serial Interface is present on a large range
|
||
|
|
of SoCs, and can be present either in the "Always-On" power domain or the
|
||
|
|
"Everything-Else" power domain.
|
||
|
|
|
||
|
|
The particularity of the "Always-On" Serial Interface is that the hardware
|
||
|
|
is active since power-on and does not need any clock gating and is usable
|
||
|
|
as very early serial console.
|
||
|
|
|
||
|
|
allOf:
|
||
|
|
- $ref: serial.yaml#
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
oneOf:
|
||
|
|
- description: Always-on power domain UART controller
|
||
|
|
items:
|
||
|
|
- enum:
|
||
|
|
- amlogic,meson6-uart
|
||
|
|
- amlogic,meson8-uart
|
||
|
|
- amlogic,meson8b-uart
|
||
|
|
- amlogic,meson-gx-uart
|
||
|
|
- amlogic,meson-s4-uart
|
||
|
|
- const: amlogic,meson-ao-uart
|
||
|
|
- description: Everything-Else power domain UART controller
|
||
|
|
enum:
|
||
|
|
- amlogic,meson6-uart
|
||
|
|
- amlogic,meson8-uart
|
||
|
|
- amlogic,meson8b-uart
|
||
|
|
- amlogic,meson-gx-uart
|
||
|
|
- amlogic,meson-s4-uart
|
||
|
|
|
||
|
|
reg:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
interrupts:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
clocks:
|
||
|
|
items:
|
||
|
|
- description: external xtal clock identifier
|
||
|
|
- description: the bus core clock, either the clk81 clock or the gate clock
|
||
|
|
- description: the source of the baudrate generator, can be either the xtal or the pclk
|
||
|
|
|
||
|
|
clock-names:
|
||
|
|
items:
|
||
|
|
- const: xtal
|
||
|
|
- const: pclk
|
||
|
|
- const: baud
|
||
|
|
|
||
|
|
fifo-size:
|
||
|
|
description: The fifo size supported by the UART channel.
|
||
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
||
|
|
enum: [64, 128]
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- interrupts
|
||
|
|
- clocks
|
||
|
|
- clock-names
|
||
|
|
|
||
|
|
unevaluatedProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
serial@84c0 {
|
||
|
|
compatible = "amlogic,meson-gx-uart";
|
||
|
|
reg = <0x84c0 0x14>;
|
||
|
|
interrupts = <26>;
|
||
|
|
clocks = <&xtal>, <&pclk>, <&xtal>;
|
||
|
|
clock-names = "xtal", "pclk", "baud";
|
||
|
|
};
|