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-r8a774e1     # RZ/G2H
46              - renesas,hscif-r8a7795      # R-Car H3
47              - renesas,hscif-r8a7796      # R-Car M3-W
48              - renesas,hscif-r8a77961     # R-Car M3-W+
49              - renesas,hscif-r8a77965     # R-Car M3-N
50              - renesas,hscif-r8a77970     # R-Car V3M
51              - renesas,hscif-r8a77980     # R-Car V3H
52              - renesas,hscif-r8a77990     # R-Car E3
53              - renesas,hscif-r8a77995     # R-Car D3
54          - const: renesas,rcar-gen3-hscif # R-Car Gen3 and RZ/G2
55          - const: renesas,hscif           # generic HSCIF compatible UART
56
57      - items:
58          - enum:
59              - renesas,hscif-r8a779a0     # R-Car V3U
60              - renesas,hscif-r8a779g0     # R-Car V4H
61          - const: renesas,rcar-gen4-hscif # R-Car Gen4
62          - const: renesas,hscif           # generic HSCIF compatible UART
63
64  reg:
65    maxItems: 1
66
67  interrupts:
68    maxItems: 1
69
70  clocks:
71    minItems: 1
72    maxItems: 4
73
74  clock-names:
75    minItems: 1
76    maxItems: 4
77    items:
78      enum:
79        - fck # UART functional clock
80        - hsck # optional external clock input
81        - brg_int # optional internal clock source for BRG frequency divider
82        - scif_clk # optional external clock source for BRG frequency divider
83
84  power-domains:
85    maxItems: 1
86
87  resets:
88    maxItems: 1
89
90  dmas:
91    minItems: 2
92    maxItems: 4
93    description:
94      Must contain a list of pairs of references to DMA specifiers, one for
95      transmission, and one for reception.
96
97  dma-names:
98    minItems: 2
99    maxItems: 4
100    items:
101      enum:
102        - tx
103        - rx
104
105required:
106  - compatible
107  - reg
108  - interrupts
109  - clocks
110  - clock-names
111  - power-domains
112
113unevaluatedProperties: false
114
115if:
116  properties:
117    compatible:
118      contains:
119        enum:
120          - renesas,rcar-gen2-hscif
121          - renesas,rcar-gen3-hscif
122          - renesas,rcar-gen4-hscif
123then:
124  required:
125    - resets
126
127examples:
128  - |
129    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
130    #include <dt-bindings/interrupt-controller/arm-gic.h>
131    #include <dt-bindings/power/r8a7795-sysc.h>
132    aliases {
133            serial1 = &hscif1;
134    };
135
136    hscif1: serial@e6550000 {
137            compatible = "renesas,hscif-r8a7795", "renesas,rcar-gen3-hscif",
138                         "renesas,hscif";
139            reg = <0xe6550000 96>;
140            interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
141            clocks = <&cpg CPG_MOD 519>, <&cpg CPG_CORE R8A7795_CLK_S3D1>,
142                     <&scif_clk>;
143            clock-names = "fck", "brg_int", "scif_clk";
144            dmas = <&dmac1 0x33>, <&dmac1 0x32>, <&dmac2 0x33>, <&dmac2 0x32>;
145            dma-names = "tx", "rx", "tx", "rx";
146            power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
147            resets = <&cpg 519>;
148            uart-has-rtscts;
149    };
150