1# SPDX-License-Identifier: GPL-2.0-only 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/mtd/jedec,spi-nor.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: SPI NOR flash ST M25Pxx (and similar) serial flash chips 8 9maintainers: 10 - Rob Herring <robh@kernel.org> 11 12properties: 13 compatible: 14 oneOf: 15 - items: 16 - pattern: "^((((micron|spansion|st),)?\ 17 (m25p(40|80|16|32|64|128)|\ 18 n25q(32b|064|128a11|128a13|256a|512a|164k)))|\ 19 atmel,at25df(321a|641|081a)|\ 20 everspin,mr25h(10|40|128|256)|\ 21 (mxicy|macronix),mx25l(4005a|1606e|6405d|8005|12805d|25635e)|\ 22 (mxicy|macronix),mx25u(4033|4035)|\ 23 (spansion,)?s25fl(128s|256s1|512s|008k|064k|164k)|\ 24 (sst|microchip),sst25vf(016b|032b|040b)|\ 25 (sst,)?sst26wf016b|\ 26 (sst,)?sst25wf(040b|080)|\ 27 winbond,w25x(80|32)|\ 28 (winbond,)?w25q(16|32(w|dw)?|64(dw)?|80bl|128(fw)?|256))$" 29 - const: jedec,spi-nor 30 - items: 31 - enum: 32 - issi,is25lp016d 33 - micron,mt25qu02g 34 - mxicy,mx25r1635f 35 - mxicy,mx25u6435f 36 - mxicy,mx25v8035f 37 - spansion,s25sl12801 38 - spansion,s25fs512s 39 - const: jedec,spi-nor 40 - const: jedec,spi-nor 41 description: 42 Must also include "jedec,spi-nor" for any SPI NOR flash that can be 43 identified by the JEDEC READ ID opcode (0x9F). 44 45 reg: 46 maxItems: 1 47 48 spi-max-frequency: true 49 spi-rx-bus-width: true 50 spi-tx-bus-width: true 51 52 m25p,fast-read: 53 type: boolean 54 description: 55 Use the "fast read" opcode to read data from the chip instead of the usual 56 "read" opcode. This opcode is not supported by all chips and support for 57 it can not be detected at runtime. Refer to your chips' datasheet to check 58 if this is supported by your chip. 59 60 broken-flash-reset: 61 type: boolean 62 description: 63 Some flash devices utilize stateful addressing modes (e.g., for 32-bit 64 addressing) which need to be managed carefully by a system. Because these 65 sorts of flash don't have a standardized software reset command, and 66 because some systems don't toggle the flash RESET# pin upon system reset 67 (if the pin even exists at all), there are systems which cannot reboot 68 properly if the flash is left in the "wrong" state. This boolean flag can 69 be used on such systems, to denote the absence of a reliable reset 70 mechanism. 71 72 label: true 73 74 partitions: 75 type: object 76 77 '#address-cells': true 78 '#size-cells': true 79 80patternProperties: 81 # Note: use 'partitions' node for new users 82 '^partition@': 83 type: object 84 85additionalProperties: false 86 87examples: 88 - | 89 spi { 90 #address-cells = <1>; 91 #size-cells = <0>; 92 93 flash@0 { 94 #address-cells = <1>; 95 #size-cells = <1>; 96 compatible = "spansion,m25p80", "jedec,spi-nor"; 97 reg = <0>; 98 spi-max-frequency = <40000000>; 99 m25p,fast-read; 100 }; 101 }; 102... 103