| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | Device tree bindings for Texas instruments Davinci/Keystone NAND controller |
| 2 | |
| 3 | This file provides information, what the device node for the davinci/keystone |
| 4 | NAND interface contains. |
| 5 | |
| 6 | Documentation: |
| 7 | Davinci DM646x - https://www.ti.com/lit/ug/sprueq7c/sprueq7c.pdf |
| 8 | Kestone - https://www.ti.com/lit/ug/sprugz3a/sprugz3a.pdf |
| 9 | |
| 10 | Required 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 | |
| 25 | Recommended 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 | |
| 56 | Deprecated 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 | |
| 70 | Nand device bindings may contain additional sub-nodes describing partitions of |
| 71 | the address space. See partition.txt for more detail. The NAND Flash timing |
| 72 | values must be programmed in the chip select’s node of AEMIF |
| 73 | memory-controller (see Documentation/devicetree/bindings/memory-controllers/ |
| 74 | davinci-aemif.txt). |
| 75 | |
| 76 | Example(da850 EVM ): |
| 77 | |
| 78 | nand_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 | }; |