xref: /linux/Documentation/devicetree/bindings/mtd/denali,nand.yaml (revision 6e7fd890f1d6ac83805409e9c346240de2705584) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mtd/denali,nand.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Denali NAND controller
8
9maintainers:
10  - Masahiro Yamada <yamada.masahiro@socionext.com>
11
12properties:
13  compatible:
14    enum:
15      - altr,socfpga-denali-nand
16      - socionext,uniphier-denali-nand-v5a
17      - socionext,uniphier-denali-nand-v5b
18
19  reg-names:
20    description: |
21      There are two register regions:
22        nand_data:  host data/command interface
23        denali_reg: register interface
24    items:
25      - const: nand_data
26      - const: denali_reg
27
28  reg:
29    minItems: 2
30    maxItems: 2
31
32  interrupts:
33    maxItems: 1
34
35  clock-names:
36    description: |
37      There are three clocks:
38        nand:   controller core clock
39        nand_x: bus interface clock
40        ecc:    ECC circuit clock
41    items:
42      - const: nand
43      - const: nand_x
44      - const: ecc
45
46  clocks:
47    minItems: 3
48    maxItems: 3
49
50  reset-names:
51    description: |
52      There are two optional resets:
53        nand: controller core reset
54        reg:  register reset
55    oneOf:
56      - items:
57          - const: nand
58          - const: reg
59      - const: nand
60      - const: reg
61
62  resets:
63    minItems: 1
64    maxItems: 2
65
66patternProperties:
67  "^nand@[a-f0-9]$":
68    type: object
69    $ref: raw-nand-chip.yaml
70    unevaluatedProperties: false
71
72allOf:
73  - $ref: nand-controller.yaml
74
75  - if:
76      properties:
77        compatible:
78          contains:
79            const: altr,socfpga-denali-nand
80    then:
81      patternProperties:
82        "^nand@[a-f0-9]$":
83          properties:
84            nand-ecc-strength:
85              enum:
86                - 8
87                - 15
88            nand-ecc-step-size:
89              enum:
90                - 512
91
92  - if:
93      properties:
94        compatible:
95          contains:
96            const: socionext,uniphier-denali-nand-v5a
97    then:
98      patternProperties:
99        "^nand@[a-f0-9]$":
100          properties:
101            nand-ecc-strength:
102              enum:
103                - 8
104                - 16
105                - 24
106            nand-ecc-step-size:
107              enum:
108                - 1024
109
110  - if:
111      properties:
112        compatible:
113          contains:
114            const: socionext,uniphier-denali-nand-v5b
115    then:
116      patternProperties:
117        "^nand@[a-f0-9]$":
118          properties:
119            nand-ecc-strength:
120              enum:
121                - 8
122                - 16
123            nand-ecc-step-size:
124              enum:
125                - 1024
126
127required:
128  - compatible
129  - reg
130  - interrupts
131  - clock-names
132  - clocks
133
134unevaluatedProperties: false
135
136examples:
137  - |
138    nand-controller@ff900000 {
139        compatible = "altr,socfpga-denali-nand";
140        reg-names = "nand_data", "denali_reg";
141        reg = <0xff900000 0x20>, <0xffb80000 0x1000>;
142        interrupts = <0 144 4>;
143        clock-names = "nand", "nand_x", "ecc";
144        clocks = <&nand_clk>, <&nand_x_clk>, <&nand_ecc_clk>;
145        reset-names = "nand", "reg";
146        resets = <&nand_rst>, <&nand_reg_rst>;
147        #address-cells = <1>;
148        #size-cells = <0>;
149
150        nand@0 {
151            reg = <0>;
152        };
153    };
154