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| 1 | +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | +%YAML 1.2 |
| 3 | +--- |
| 4 | +$id: http://devicetree.org/schemas/memory-controllers/arm,pl172.yaml# |
| 5 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | + |
| 7 | +title: ARM PL172/PL175/PL176 MultiPort Memory Controller |
| 8 | + |
| 9 | +maintainers: |
| 10 | + |
| 11 | + |
| 12 | +# We need a select here so we don't match all nodes with 'arm,primecell' |
| 13 | +select: |
| 14 | + properties: |
| 15 | + compatible: |
| 16 | + contains: |
| 17 | + enum: |
| 18 | + - arm,pl172 |
| 19 | + - arm,pl175 |
| 20 | + - arm,pl176 |
| 21 | + required: |
| 22 | + - compatible |
| 23 | + |
| 24 | +properties: |
| 25 | + compatible: |
| 26 | + items: |
| 27 | + - enum: |
| 28 | + - arm,pl172 |
| 29 | + - arm,pl175 |
| 30 | + - arm,pl176 |
| 31 | + - const: arm,primecell |
| 32 | + |
| 33 | + reg: |
| 34 | + maxItems: 1 |
| 35 | + |
| 36 | + '#address-cells': |
| 37 | + const: 2 |
| 38 | + |
| 39 | + '#size-cells': |
| 40 | + const: 1 |
| 41 | + |
| 42 | + ranges: true |
| 43 | + |
| 44 | + clocks: |
| 45 | + maxItems: 2 |
| 46 | + |
| 47 | + clock-names: |
| 48 | + items: |
| 49 | + - const: mpmcclk |
| 50 | + - const: apb_pclk |
| 51 | + |
| 52 | + clock-ranges: true |
| 53 | + |
| 54 | + resets: |
| 55 | + maxItems: 1 |
| 56 | + |
| 57 | +patternProperties: |
| 58 | + "^cs[0-9]$": |
| 59 | + type: object |
| 60 | + additionalProperties: false |
| 61 | + patternProperties: |
| 62 | + "^flash@[0-9],[0-9a-f]+$": |
| 63 | + type: object |
| 64 | + $ref: /schemas/mtd/mtd-physmap.yaml# |
| 65 | + unevaluatedProperties: false |
| 66 | + |
| 67 | + "^(gpio|sram)@[0-9],[0-9a-f]+$": |
| 68 | + type: object |
| 69 | + additionalProperties: true |
| 70 | + |
| 71 | + properties: |
| 72 | + '#address-cells': |
| 73 | + const: 2 |
| 74 | + |
| 75 | + '#size-cells': |
| 76 | + const: 1 |
| 77 | + |
| 78 | + ranges: true |
| 79 | + |
| 80 | + clocks: |
| 81 | + maxItems: 2 |
| 82 | + |
| 83 | + clock-ranges: true |
| 84 | + |
| 85 | + mpmc,cs: |
| 86 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 87 | + description: |
| 88 | + Chip select number. Indicates to the pl0172 driver |
| 89 | + which chipselect is used for accessing the memory. |
| 90 | + |
| 91 | + mpmc,memory-width: |
| 92 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 93 | + enum: [8, 16, 32] |
| 94 | + description: |
| 95 | + Width of the chip select memory. Must be equal to either 8, 16 or 32. |
| 96 | + |
| 97 | + mpmc,async-page-mode: |
| 98 | + $ref: /schemas/types.yaml#/definitions/flag |
| 99 | + description: |
| 100 | + Enable asynchronous page mode. |
| 101 | + |
| 102 | + mpmc,cs-active-high: |
| 103 | + $ref: /schemas/types.yaml#/definitions/flag |
| 104 | + description: |
| 105 | + Set chip select polarity to active high. |
| 106 | + |
| 107 | + mpmc,byte-lane-low: |
| 108 | + $ref: /schemas/types.yaml#/definitions/flag |
| 109 | + description: |
| 110 | + Set byte lane state to low. |
| 111 | + |
| 112 | + mpmc,extended-wait: |
| 113 | + $ref: /schemas/types.yaml#/definitions/flag |
| 114 | + description: |
| 115 | + Enable extended wait. |
| 116 | + |
| 117 | + mpmc,buffer-enable: |
| 118 | + $ref: /schemas/types.yaml#/definitions/flag |
| 119 | + description: |
| 120 | + Enable write buffer, option is not supported by |
| 121 | + PL175 and PL176 controllers. |
| 122 | + |
| 123 | + mpmc,write-protect: |
| 124 | + $ref: /schemas/types.yaml#/definitions/flag |
| 125 | + description: |
| 126 | + Enable write protect. |
| 127 | + |
| 128 | + mpmc,read-enable-delay: |
| 129 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 130 | + description: |
| 131 | + Delay from chip select assertion to read |
| 132 | + enable (RE signal) in nano seconds. |
| 133 | + |
| 134 | + mpmc,write-enable-delay: |
| 135 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 136 | + description: |
| 137 | + Delay from chip select assertion to write |
| 138 | + enable (WE signal) in nano seconds. |
| 139 | + |
| 140 | + mpmc,output-enable-delay: |
| 141 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 142 | + description: |
| 143 | + Delay from chip select assertion to output |
| 144 | + enable (OE signal) in nano seconds. |
| 145 | + |
| 146 | + mpmc,write-access-delay: |
| 147 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 148 | + description: |
| 149 | + Delay from chip select assertion to write |
| 150 | + access in nano seconds. |
| 151 | + |
| 152 | + mpmc,read-access-delay: |
| 153 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 154 | + description: |
| 155 | + Delay from chip select assertion to read |
| 156 | + access in nano seconds. |
| 157 | + |
| 158 | + mpmc,page-mode-read-delay: |
| 159 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 160 | + description: |
| 161 | + Delay for asynchronous page mode sequential |
| 162 | + accesses in nano seconds. |
| 163 | + |
| 164 | + mpmc,turn-round-delay: |
| 165 | + $ref: /schemas/types.yaml#/definitions/uint32 |
| 166 | + description: |
| 167 | + Delay between access to memory banks in nano |
| 168 | + seconds. |
| 169 | + |
| 170 | +required: |
| 171 | + - compatible |
| 172 | + - reg |
| 173 | + - '#address-cells' |
| 174 | + - '#size-cells' |
| 175 | + - ranges |
| 176 | + - clocks |
| 177 | + - clock-names |
| 178 | + |
| 179 | +additionalProperties: false |
| 180 | + |
| 181 | +examples: |
| 182 | + - | |
| 183 | + #include <dt-bindings/clock/lpc18xx-ccu.h> |
| 184 | +
|
| 185 | + memory-controller@40005000 { |
| 186 | + compatible = "arm,pl172", "arm,primecell"; |
| 187 | + reg = <0x40005000 0x1000>; |
| 188 | + clocks = <&ccu1 CLK_CPU_EMCDIV>, <&ccu1 CLK_CPU_EMC>; |
| 189 | + clock-names = "mpmcclk", "apb_pclk"; |
| 190 | + #address-cells = <2>; |
| 191 | + #size-cells = <1>; |
| 192 | + ranges = <0 0 0x1c000000 0x1000000 |
| 193 | + 1 0 0x1d000000 0x1000000 |
| 194 | + 2 0 0x1e000000 0x1000000 |
| 195 | + 3 0 0x1f000000 0x1000000>; |
| 196 | +
|
| 197 | + cs0 { |
| 198 | + #address-cells = <2>; |
| 199 | + #size-cells = <1>; |
| 200 | + ranges; |
| 201 | +
|
| 202 | + mpmc,cs = <0>; |
| 203 | + mpmc,memory-width = <16>; |
| 204 | + mpmc,byte-lane-low; |
| 205 | + mpmc,write-enable-delay = <0>; |
| 206 | + mpmc,output-enable-delay = <0>; |
| 207 | + mpmc,read-enable-delay = <70>; |
| 208 | + mpmc,page-mode-read-delay = <70>; |
| 209 | +
|
| 210 | + flash@0,0 { |
| 211 | + compatible = "sst,sst39vf320", "cfi-flash"; |
| 212 | + reg = <0 0 0x400000>; |
| 213 | + bank-width = <2>; |
| 214 | + #address-cells = <1>; |
| 215 | + #size-cells = <1>; |
| 216 | + partition@0 { |
| 217 | + label = "data"; |
| 218 | + reg = <0 0x400000>; |
| 219 | + }; |
| 220 | + }; |
| 221 | + }; |
| 222 | + }; |
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