1# SPDX-License-Identifier: GPL-2.0-only
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/spi/snps,dw-apb-ssi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface
8
9maintainers:
10  - Mark Brown <broonie@kernel.org>
11
12allOf:
13  - $ref: "spi-controller.yaml#"
14  - if:
15      properties:
16        compatible:
17          contains:
18            enum:
19              - mscc,ocelot-spi
20              - mscc,jaguar2-spi
21    then:
22      properties:
23        reg:
24          minItems: 2
25  - if:
26      properties:
27        compatible:
28          contains:
29            enum:
30              - baikal,bt1-sys-ssi
31    then:
32      properties:
33        mux-controls:
34          maxItems: 1
35      required:
36        - mux-controls
37    else:
38      required:
39        - interrupts
40
41properties:
42  compatible:
43    oneOf:
44      - description: Generic DW SPI Controller
45        enum:
46          - snps,dw-apb-ssi
47          - snps,dwc-ssi-1.01a
48      - description: Microsemi Ocelot/Jaguar2 SoC SPI Controller
49        items:
50          - enum:
51              - mscc,ocelot-spi
52              - mscc,jaguar2-spi
53          - const: snps,dw-apb-ssi
54      - description: Microchip Sparx5 SoC SPI Controller
55        const: microchip,sparx5-spi
56      - description: Amazon Alpine SPI Controller
57        const: amazon,alpine-dw-apb-ssi
58      - description: Renesas RZ/N1 SPI Controller
59        items:
60          - const: renesas,rzn1-spi
61          - const: snps,dw-apb-ssi
62      - description: Intel Keem Bay SPI Controller
63        const: intel,keembay-ssi
64      - description: Baikal-T1 SPI Controller
65        const: baikal,bt1-ssi
66      - description: Baikal-T1 System Boot SPI Controller
67        const: baikal,bt1-sys-ssi
68      - description: Canaan Kendryte K210 SoS SPI Controller
69        const: canaan,k210-spi
70      - description: Renesas RZ/N1 SPI Controller
71        items:
72          - enum:
73              - renesas,r9a06g032-spi # RZ/N1D
74              - renesas,r9a06g033-spi # RZ/N1S
75          - const: renesas,rzn1-spi   # RZ/N1
76
77  reg:
78    minItems: 1
79    items:
80      - description: DW APB SSI controller memory mapped registers
81      - description: SPI MST region map or directly mapped SPI ROM
82
83  interrupts:
84    maxItems: 1
85
86  clocks:
87    minItems: 1
88    items:
89      - description: SPI Controller reference clock source
90      - description: APB interface clock source
91
92  clock-names:
93    minItems: 1
94    items:
95      - const: ssi_clk
96      - const: pclk
97
98  resets:
99    maxItems: 1
100
101  reset-names:
102    const: spi
103
104  reg-io-width:
105    $ref: /schemas/types.yaml#/definitions/uint32
106    description: I/O register width (in bytes) implemented by this device
107    default: 4
108    enum: [ 2, 4 ]
109
110  num-cs:
111    default: 4
112    minimum: 1
113    maximum: 4
114
115  dmas:
116    items:
117      - description: TX DMA Channel
118      - description: RX DMA Channel
119
120  dma-names:
121    items:
122      - const: tx
123      - const: rx
124
125  rx-sample-delay-ns:
126    default: 0
127    description: Default value of the rx-sample-delay-ns property.
128      This value will be used if the property is not explicitly defined
129      for a SPI slave device. See below.
130
131patternProperties:
132  "^.*@[0-9a-f]+$":
133    type: object
134    properties:
135      reg:
136        minimum: 0
137        maximum: 3
138
139      spi-rx-bus-width:
140        const: 1
141
142      spi-tx-bus-width:
143        const: 1
144
145      rx-sample-delay-ns:
146        description: SPI Rx sample delay offset, unit is nanoseconds.
147          The delay from the default sample time before the actual
148          sample of the rxd input signal occurs. The "rx_sample_delay"
149          is an optional feature of the designware controller, and the
150          upper limit is also subject to controller configuration.
151
152unevaluatedProperties: false
153
154required:
155  - compatible
156  - reg
157  - "#address-cells"
158  - "#size-cells"
159  - clocks
160
161examples:
162  - |
163    spi@fff00000 {
164      compatible = "snps,dw-apb-ssi";
165      reg = <0xfff00000 0x1000>;
166      #address-cells = <1>;
167      #size-cells = <0>;
168      interrupts = <0 154 4>;
169      clocks = <&spi_m_clk>;
170      num-cs = <2>;
171      cs-gpios = <&gpio0 13 0>,
172                 <&gpio0 14 0>;
173      rx-sample-delay-ns = <3>;
174      spi-flash@1 {
175        compatible = "spi-nand";
176        reg = <1>;
177        rx-sample-delay-ns = <7>;
178      };
179    };
180  - |
181    spi@1f040100 {
182      compatible = "baikal,bt1-sys-ssi";
183      reg = <0x1f040100 0x900>,
184            <0x1c000000 0x1000000>;
185      #address-cells = <1>;
186      #size-cells = <0>;
187      mux-controls = <&boot_mux>;
188      clocks = <&ccu_sys>;
189      clock-names = "ssi_clk";
190    };
191...
192