xref: /freebsd/sys/contrib/device-tree/Bindings/serial/mediatek,uart.yaml (revision 657729a89dd578d8cfc70d6616f5c65a48a8b33a) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/serial/mediatek,uart.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: MediaTek Universal Asynchronous Receiver/Transmitter (UART)
8
9maintainers:
10  - Matthias Brugger <matthias.bgg@gmail.com>
11
12allOf:
13  - $ref: serial.yaml#
14
15description: |
16  The MediaTek UART is based on the basic 8250 UART and compatible
17  with 16550A, with enhancements for high speed baud rates and
18  support for DMA.
19
20properties:
21  compatible:
22    oneOf:
23      - const: mediatek,mt6577-uart
24      - items:
25          - enum:
26              - mediatek,mt2701-uart
27              - mediatek,mt2712-uart
28              - mediatek,mt6580-uart
29              - mediatek,mt6582-uart
30              - mediatek,mt6589-uart
31              - mediatek,mt6755-uart
32              - mediatek,mt6765-uart
33              - mediatek,mt6779-uart
34              - mediatek,mt6795-uart
35              - mediatek,mt6797-uart
36              - mediatek,mt7622-uart
37              - mediatek,mt7623-uart
38              - mediatek,mt7629-uart
39              - mediatek,mt7986-uart
40              - mediatek,mt8127-uart
41              - mediatek,mt8135-uart
42              - mediatek,mt8173-uart
43              - mediatek,mt8183-uart
44              - mediatek,mt8186-uart
45              - mediatek,mt8192-uart
46              - mediatek,mt8195-uart
47              - mediatek,mt8516-uart
48          - const: mediatek,mt6577-uart
49
50  reg:
51    description: The base address of the UART register bank
52    maxItems: 1
53
54  clocks:
55    minItems: 1
56    items:
57      - description: The clock the baudrate is derived from
58      - description: The bus clock for register accesses
59
60  clock-names:
61    minItems: 1
62    items:
63      - const: baud
64      - const: bus
65
66  dmas:
67    items:
68      - description: phandle to TX DMA
69      - description: phandle to RX DMA
70
71  dma-names:
72    items:
73      - const: tx
74      - const: rx
75
76  interrupts:
77    minItems: 1
78    maxItems: 2
79
80  interrupt-names:
81    description:
82      The UART interrupt and optionally the RX in-band wakeup interrupt.
83    minItems: 1
84    items:
85      - const: uart
86      - const: wakeup
87
88  pinctrl-0: true
89  pinctrl-1: true
90
91  pinctrl-names:
92    minItems: 1
93    items:
94      - const: default
95      - const: sleep
96
97required:
98  - compatible
99  - reg
100  - clocks
101  - interrupts
102
103unevaluatedProperties: false
104
105examples:
106  - |
107    #include <dt-bindings/interrupt-controller/arm-gic.h>
108
109    serial@11006000 {
110        compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
111        reg = <0x11006000 0x400>;
112        interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>,
113                     <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>;
114        interrupt-names = "uart", "wakeup";
115        clocks = <&uart_clk>, <&bus_clk>;
116        clock-names = "baud", "bus";
117        pinctrl-0 = <&uart_pin>;
118        pinctrl-1 = <&uart_pin_sleep>;
119        pinctrl-names = "default", "sleep";
120    };
121