1Device tree bindings for Texas instruments Davinci/Keystone NAND controller 2 3This file provides information, what the device node for the davinci/keystone 4NAND interface contains. 5 6Documentation: 7Davinci DM646x - https://www.ti.com/lit/ug/sprueq7c/sprueq7c.pdf 8Kestone - https://www.ti.com/lit/ug/sprugz3a/sprugz3a.pdf 9 10Required properties: 11 12- compatible: "ti,davinci-nand" 13 "ti,keystone-nand" 14 15- reg: Contains 2 offset/length values: 16 - offset and length for the access window. 17 - offset and length for accessing the AEMIF 18 control registers. 19 20- ti,davinci-chipselect: number of chipselect. Indicates on the 21 davinci_nand driver which chipselect is used 22 for accessing the nand. 23 Can be in the range [0-3]. 24 25Recommended properties : 26 27- ti,davinci-mask-ale: mask for ALE. Needed for executing address 28 phase. These offset will be added to the base 29 address for the chip select space the NAND Flash 30 device is connected to. 31 If not set equal to 0x08. 32 33- ti,davinci-mask-cle: mask for CLE. Needed for executing command 34 phase. These offset will be added to the base 35 address for the chip select space the NAND Flash 36 device is connected to. 37 If not set equal to 0x10. 38 39- ti,davinci-mask-chipsel: mask for chipselect address. Needed to mask 40 addresses for given chipselect. 41 42- nand-ecc-mode: operation mode of the NAND ecc mode. ECC mode 43 valid values for davinci driver: 44 - "none" 45 - "soft" 46 - "hw" 47 48- ti,davinci-ecc-bits: used ECC bits, currently supported 1 or 4. 49 50- nand-bus-width: buswidth 8 or 16. If not present 8. 51 52- nand-on-flash-bbt: use flash based bad block table support. OOB 53 identifier is saved in OOB area. If not present 54 false. 55 56Deprecated properties: 57 58- ti,davinci-ecc-mode: operation mode of the NAND ecc mode. ECC mode 59 valid values for davinci driver: 60 - "none" 61 - "soft" 62 - "hw" 63 64- ti,davinci-nand-buswidth: buswidth 8 or 16. If not present 8. 65 66- ti,davinci-nand-use-bbt: use flash based bad block table support. OOB 67 identifier is saved in OOB area. If not present 68 false. 69 70Nand device bindings may contain additional sub-nodes describing partitions of 71the address space. See partition.txt for more detail. The NAND Flash timing 72values must be programmed in the chip select’s node of AEMIF 73memory-controller (see Documentation/devicetree/bindings/memory-controllers/ 74davinci-aemif.txt). 75 76Example(da850 EVM ): 77 78nand_cs3@62000000 { 79 compatible = "ti,davinci-nand"; 80 reg = <0x62000000 0x807ff 81 0x68000000 0x8000>; 82 ti,davinci-chipselect = <1>; 83 ti,davinci-mask-ale = <0>; 84 ti,davinci-mask-cle = <0>; 85 ti,davinci-mask-chipsel = <0>; 86 nand-ecc-mode = "hw"; 87 ti,davinci-ecc-bits = <4>; 88 nand-on-flash-bbt; 89 90 partition@180000 { 91 label = "ubifs"; 92 reg = <0x180000 0x7e80000>; 93 }; 94}; 95