1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 # Copyright 2019 Unisoc Inc.
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/serial/sprd-uart.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Spreadtrum serial UART
9
10 maintainers:
11 - Orson Zhai <orsonzhai@gmail.com>
12 - Baolin Wang <baolin.wang7@gmail.com>
13 - Chunyan Zhang <zhang.lyra@gmail.com>
14
15 properties:
16 compatible:
17 oneOf:
18 - items:
19 - enum:
20 - sprd,sc9860-uart
21 - sprd,sc9863a-uart
22 - sprd,ums512-uart
23 - sprd,ums9620-uart
24 - const: sprd,sc9836-uart
25 - const: sprd,sc9836-uart
26
27 reg:
28 maxItems: 1
29
30 interrupts:
31 maxItems: 1
32
33 clocks:
34 minItems: 1
35 maxItems: 3
36
37 clock-names:
38 description: |
39 "enable" for UART module enable clock, "uart" for UART clock, "source"
40 for UART source (parent) clock.
41 items:
42 - const: enable
43 - const: uart
44 - const: source
45
46 dmas:
47 minItems: 1
48 maxItems: 2
49
50 dma-names:
51 minItems: 1
52 items:
53 - const: rx
54 - const: tx
55
56 required:
57 - compatible
58 - reg
59 - interrupts
60
61 additionalProperties: false
62
63 examples:
64 - |
65 #include <dt-bindings/interrupt-controller/arm-gic.h>
66 serial@0 {
67 compatible = "sprd,sc9860-uart", "sprd,sc9836-uart";
68 reg = <0x0 0x100>;
69 interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
70 dma-names = "rx", "tx";
71 dmas = <&ap_dma 19>, <&ap_dma 20>;
72 clock-names = "enable", "uart", "source";
73 clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
74 };
75
76 ...
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