1 # SPDX-License-Identifier: GPL-2.0-only OR BSD 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/eeprom/at25 !! 4 $id: "http://devicetree.org/schemas/eeprom/at25.yaml#"
5 $schema: http://devicetree.org/meta-schemas/co !! 5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
6 6
7 title: SPI EEPROMs or FRAMs compatible with At !! 7 title: SPI EEPROMs compatible with Atmel's AT25
8 8
9 maintainers: 9 maintainers:
10 - Christian Eggers <ceggers@arri.de> 10 - Christian Eggers <ceggers@arri.de>
11 11
12 properties: 12 properties:
13 $nodename: 13 $nodename:
14 anyOf: !! 14 pattern: "^eeprom@[0-9a-f]{1,2}$"
15 - pattern: "^eeprom@[0-9a-f]{1,2}$" <<
16 - pattern: "^fram@[0-9a-f]{1,2}$" <<
17 15
18 # There are multiple known vendors who manuf 16 # There are multiple known vendors who manufacture EEPROM chips compatible
19 # with Atmel's AT25. The compatible string r 17 # with Atmel's AT25. The compatible string requires two items where the
20 # 'vendor' and 'model' parts of the first ar 18 # 'vendor' and 'model' parts of the first are the actual chip and the second
21 # item is fixed to "atmel,at25". Some existi 19 # item is fixed to "atmel,at25". Some existing bindings only have the
22 # "atmel,at25" part and should be fixed by s 20 # "atmel,at25" part and should be fixed by somebody who knows vendor and
23 # product. 21 # product.
24 compatible: 22 compatible:
25 oneOf: 23 oneOf:
26 - items: 24 - items:
27 - enum: 25 - enum:
28 - anvo,anv32e61w 26 - anvo,anv32e61w
29 - atmel,at25256B 27 - atmel,at25256B
30 - fujitsu,mb85rs1mt 28 - fujitsu,mb85rs1mt
31 - fujitsu,mb85rs256 <<
32 - fujitsu,mb85rs64 29 - fujitsu,mb85rs64
33 - microchip,at25160bn 30 - microchip,at25160bn
34 - microchip,25lc040 31 - microchip,25lc040
35 - st,m95m02 32 - st,m95m02
36 - st,m95256 33 - st,m95256
37 - st,m95640 <<
38 - cypress,fm25 <<
39 34
40 - const: atmel,at25 35 - const: atmel,at25
41 36
42 # Please don't use this alternative for 37 # Please don't use this alternative for new bindings.
43 - items: 38 - items:
44 - const: atmel,at25 39 - const: atmel,at25
45 40
46 reg: 41 reg:
47 maxItems: 1 42 maxItems: 1
48 43
>> 44 spi-max-frequency: true
>> 45
49 pagesize: 46 pagesize:
50 $ref: /schemas/types.yaml#/definitions/uin 47 $ref: /schemas/types.yaml#/definitions/uint32
51 enum: [1, 8, 16, 32, 64, 128, 256, 512, 10 48 enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]
52 description: 49 description:
53 Size of the eeprom page. FRAMs don't hav !! 50 Size of the eeprom page.
54 51
55 size: 52 size:
56 $ref: /schemas/types.yaml#/definitions/uin 53 $ref: /schemas/types.yaml#/definitions/uint32
57 description: 54 description:
58 Total eeprom size in bytes. 55 Total eeprom size in bytes.
59 56
60 address-width: 57 address-width:
61 $ref: /schemas/types.yaml#/definitions/uin 58 $ref: /schemas/types.yaml#/definitions/uint32
62 enum: [ 8, 9, 16, 24 ] 59 enum: [ 8, 9, 16, 24 ]
63 description: 60 description:
64 Number of address bits. 61 Number of address bits.
65 For 9 bits, the MSB of the address is se 62 For 9 bits, the MSB of the address is sent as bit 3 of the instruction
66 byte, before the address byte. 63 byte, before the address byte.
67 64
68 spi-cpha: true 65 spi-cpha: true
69 66
70 spi-cpol: true 67 spi-cpol: true
71 68
72 read-only: 69 read-only:
73 description: 70 description:
74 Disable writes to the eeprom. 71 Disable writes to the eeprom.
75 type: boolean 72 type: boolean
76 73
77 wp-gpios: 74 wp-gpios:
78 maxItems: 1 75 maxItems: 1
79 description: 76 description:
80 GPIO to which the write-protect pin of t 77 GPIO to which the write-protect pin of the chip is connected.
81 78
82 # Deprecated: at25,byte-len, at25,addr-mode, 79 # Deprecated: at25,byte-len, at25,addr-mode, at25,page-size
83 at25,byte-len: 80 at25,byte-len:
84 $ref: /schemas/types.yaml#/definitions/uin 81 $ref: /schemas/types.yaml#/definitions/uint32
85 description: 82 description:
86 Total eeprom size in bytes. Deprecated, 83 Total eeprom size in bytes. Deprecated, use "size" property instead.
87 deprecated: true 84 deprecated: true
88 85
89 at25,addr-mode: 86 at25,addr-mode:
90 $ref: /schemas/types.yaml#/definitions/uin 87 $ref: /schemas/types.yaml#/definitions/uint32
91 description: 88 description:
92 Addr-mode flags, as defined in include/l 89 Addr-mode flags, as defined in include/linux/spi/eeprom.h.
93 Deprecated, use "address-width" property 90 Deprecated, use "address-width" property instead.
94 deprecated: true 91 deprecated: true
95 92
96 at25,page-size: 93 at25,page-size:
97 $ref: /schemas/types.yaml#/definitions/uin 94 $ref: /schemas/types.yaml#/definitions/uint32
98 description: 95 description:
99 Size of the eeprom page. Deprecated, use 96 Size of the eeprom page. Deprecated, use "pagesize" property instead.
100 deprecated: true 97 deprecated: true
101 98
102 required: 99 required:
103 - compatible 100 - compatible
104 - reg 101 - reg
105 - spi-max-frequency 102 - spi-max-frequency
>> 103 - pagesize
>> 104 - size
>> 105 - address-width
106 106
107 allOf: !! 107 additionalProperties: false
108 - $ref: /schemas/spi/spi-peripheral-props.ya <<
109 - $ref: /schemas/nvmem/nvmem.yaml <<
110 - if: <<
111 properties: <<
112 compatible: <<
113 not: <<
114 contains: <<
115 const: cypress,fm25 <<
116 then: <<
117 required: <<
118 - pagesize <<
119 - size <<
120 - address-width <<
121 <<
122 unevaluatedProperties: false <<
123 108
124 examples: 109 examples:
125 - | 110 - |
126 #include <dt-bindings/gpio/gpio.h> 111 #include <dt-bindings/gpio/gpio.h>
127 spi { !! 112 spi0 {
128 #address-cells = <1>; 113 #address-cells = <1>;
129 #size-cells = <0>; 114 #size-cells = <0>;
130 115
131 eeprom@0 { 116 eeprom@0 {
132 compatible = "st,m95256", "atmel,a 117 compatible = "st,m95256", "atmel,at25";
133 reg = <0>; 118 reg = <0>;
134 spi-max-frequency = <5000000>; 119 spi-max-frequency = <5000000>;
135 spi-cpha; 120 spi-cpha;
136 spi-cpol; 121 spi-cpol;
137 wp-gpios = <&gpio1 3 0>; 122 wp-gpios = <&gpio1 3 0>;
138 123
139 pagesize = <64>; 124 pagesize = <64>;
140 size = <32768>; 125 size = <32768>;
141 address-width = <16>; 126 address-width = <16>;
142 }; <<
143 <<
144 fram@1 { <<
145 compatible = "cypress,fm25", "atme <<
146 reg = <1>; <<
147 spi-max-frequency = <40000000>; <<
148 }; 127 };
149 }; 128 };
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