1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/serial/renesas,hscif.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Renesas High Speed Serial Communication Interface with FIFO (HSCIF)
8
9maintainers:
10  - Geert Uytterhoeven <geert+renesas@glider.be>
11
12allOf:
13  - $ref: serial.yaml#
14
15properties:
16  compatible:
17    oneOf:
18      - items:
19          - enum:
20              - renesas,hscif-r8a7778      # R-Car M1
21              - renesas,hscif-r8a7779      # R-Car H1
22          - const: renesas,rcar-gen1-hscif # R-Car Gen1
23          - const: renesas,hscif           # generic HSCIF compatible UART
24
25      - items:
26          - enum:
27              - renesas,hscif-r8a7742      # RZ/G1H
28              - renesas,hscif-r8a7743      # RZ/G1M
29              - renesas,hscif-r8a7744      # RZ/G1N
30              - renesas,hscif-r8a7745      # RZ/G1E
31              - renesas,hscif-r8a77470     # RZ/G1C
32              - renesas,hscif-r8a7790      # R-Car H2
33              - renesas,hscif-r8a7791      # R-Car M2-W
34              - renesas,hscif-r8a7792      # R-Car V2H
35              - renesas,hscif-r8a7793      # R-Car M2-N
36              - renesas,hscif-r8a7794      # R-Car E2
37          - const: renesas,rcar-gen2-hscif # R-Car Gen2 and RZ/G1
38          - const: renesas,hscif           # generic HSCIF compatible UART
39
40      - items:
41          - enum:
42              - renesas,hscif-r8a774a1     # RZ/G2M
43              - renesas,hscif-r8a774b1     # RZ/G2N
44              - renesas,hscif-r8a774c0     # RZ/G2E
45              - renesas,hscif-r8a7795      # R-Car H3
46              - renesas,hscif-r8a7796      # R-Car M3-W
47              - renesas,hscif-r8a77961     # R-Car M3-W+
48              - renesas,hscif-r8a77965     # R-Car M3-N
49              - renesas,hscif-r8a77970     # R-Car V3M
50              - renesas,hscif-r8a77980     # R-Car V3H
51              - renesas,hscif-r8a77990     # R-Car E3
52              - renesas,hscif-r8a77995     # R-Car D3
53          - const: renesas,rcar-gen3-hscif # R-Car Gen3 and RZ/G2
54          - const: renesas,hscif           # generic HSCIF compatible UART
55
56  reg:
57    maxItems: 1
58
59  interrupts:
60    maxItems: 1
61
62  clocks:
63    minItems: 1
64    maxItems: 4
65
66  clock-names:
67    minItems: 1
68    maxItems: 4
69    items:
70      enum:
71        - fck # UART functional clock
72        - hsck # optional external clock input
73        - brg_int # optional internal clock source for BRG frequency divider
74        - scif_clk # optional external clock source for BRG frequency divider
75
76  power-domains:
77    maxItems: 1
78
79  resets:
80    maxItems: 1
81
82  dmas:
83    description:
84      Must contain a list of pairs of references to DMA specifiers, one for
85      transmission, and one for reception.
86
87  dma-names:
88    minItems: 2
89    maxItems: 4
90    items:
91      enum:
92        - tx
93        - rx
94
95required:
96  - compatible
97  - reg
98  - interrupts
99  - clocks
100  - clock-names
101  - power-domains
102
103if:
104  properties:
105    compatible:
106      contains:
107        enum:
108          - renesas,rcar-gen2-hscif
109          - renesas,rcar-gen3-hscif
110then:
111  required:
112    - resets
113
114examples:
115  - |
116    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
117    #include <dt-bindings/interrupt-controller/arm-gic.h>
118    #include <dt-bindings/power/r8a7795-sysc.h>
119    aliases {
120            serial1 = &hscif1;
121    };
122
123    hscif1: serial@e6550000 {
124            compatible = "renesas,hscif-r8a7795", "renesas,rcar-gen3-hscif",
125                         "renesas,hscif";
126            reg = <0xe6550000 96>;
127            interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
128            clocks = <&cpg CPG_MOD 519>, <&cpg CPG_CORE R8A7795_CLK_S3D1>,
129                     <&scif_clk>;
130            clock-names = "fck", "brg_int", "scif_clk";
131            dmas = <&dmac1 0x33>, <&dmac1 0x32>, <&dmac2 0x33>, <&dmac2 0x32>;
132            dma-names = "tx", "rx", "tx", "rx";
133            power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
134            resets = <&cpg 519>;
135            uart-has-rtscts;
136    };
137