xref: /linux/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml (revision a4eb44a6435d6d8f9e642407a4a06f65eb90ca04) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/serial/fsl-lpuart.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale low power universal asynchronous receiver/transmitter (lpuart)
8
9maintainers:
10  - Fugang Duan <fugang.duan@nxp.com>
11
12allOf:
13  - $ref: "rs485.yaml"
14
15properties:
16  compatible:
17    oneOf:
18      - enum:
19          - fsl,vf610-lpuart
20          - fsl,ls1021a-lpuart
21          - fsl,ls1028a-lpuart
22          - fsl,imx7ulp-lpuart
23          - fsl,imx8qm-lpuart
24          - fsl,imxrt1050-lpuart
25      - items:
26          - enum:
27              - fsl,imx8qxp-lpuart
28              - fsl,imx8ulp-lpuart
29          - const: fsl,imx7ulp-lpuart
30      - items:
31          - const: fsl,imx8qm-lpuart
32          - const: fsl,imx8qxp-lpuart
33
34  reg:
35    maxItems: 1
36
37  interrupts:
38    maxItems: 1
39
40  clocks:
41    items:
42      - description: ipg clock
43      - description: baud clock
44    minItems: 1
45
46  clock-names:
47    items:
48      - const: ipg
49      - const: baud
50    minItems: 1
51
52  dmas:
53    items:
54      - description: DMA controller phandle and request line for RX
55      - description: DMA controller phandle and request line for TX
56
57  dma-names:
58    items:
59      - const: rx
60      - const: tx
61
62  rs485-rts-active-low: true
63  linux,rs485-enabled-at-boot-time: true
64
65required:
66  - compatible
67  - reg
68  - interrupts
69  - clocks
70  - clock-names
71
72unevaluatedProperties: false
73
74examples:
75  - |
76    #include <dt-bindings/clock/vf610-clock.h>
77
78    serial@40027000 {
79        compatible = "fsl,vf610-lpuart";
80        reg = <0x40027000 0x1000>;
81        interrupts = <0 61 0x00>;
82        clocks = <&clks VF610_CLK_UART0>;
83        clock-names = "ipg";
84        dmas = <&edma0 0 2>, <&edma0 0 3>;
85        dma-names = "rx","tx";
86    };
87