projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e10db1f0 HS |
1 | * Freescale General-Purpose Media Interface (GPMI) |
| 2 | ||
| 3 | The GPMI nand controller provides an interface to control the | |
| ed0215cc | 4 | NAND flash chips. |
| e10db1f0 HS |
5 | |
| 6 | Required properties: | |
| 7 | - compatible : should be "fsl,<chip>-gpmi-nand" | |
| 8 | - reg : should contain registers location and length for gpmi and bch. | |
| 9 | - reg-names: Should contain the reg names "gpmi-nand" and "bch" | |
| 5fac0e18 SG |
10 | - interrupts : BCH interrupt number. |
| 11 | - interrupt-names : Should be "bch". | |
| 12 | - dmas: DMA specifier, consisting of a phandle to DMA controller node | |
| 13 | and GPMI DMA channel ID. | |
| 14 | Refer to dma.txt and fsl-mxs-dma.txt for details. | |
| 15 | - dma-names: Must be "rx-tx". | |
| e10db1f0 | 16 | |
| c50c6940 HS |
17 | Optional properties: |
| 18 | - nand-on-flash-bbt: boolean to enable on flash bbt option if not | |
| 19 | present false | |
| 89b59e6c HS |
20 | - fsl,use-minimum-ecc: Protect this NAND flash with the minimum ECC |
| 21 | strength required. The required ECC strength is | |
| 22 | automatically discoverable for some flash | |
| 23 | (e.g., according to the ONFI standard). | |
| 24 | However, note that if this strength is not | |
| 25 | discoverable or this property is not enabled, | |
| 26 | the software may chooses an implementation-defined | |
| 27 | ECC scheme. | |
| 2a500afe LW |
28 | - fsl,no-blockmark-swap: Don't swap the bad block marker from the OOB |
| 29 | area with the byte in the data area but rely on the | |
| 30 | flash based BBT for identifying bad blocks. | |
| 31 | NOTE: this is only valid in conjunction with | |
| 32 | 'nand-on-flash-bbt'. | |
| 33 | WARNING: on i.MX28 blockmark swapping cannot be | |
| 34 | disabled for the BootROM in the FCB. Thus, | |
| 35 | partitions written from Linux with this feature | |
| 36 | turned on may not be accessible by the BootROM | |
| 37 | code. | |
| c50c6940 | 38 | |
| e10db1f0 HS |
39 | The device tree may optionally contain sub-nodes describing partitions of the |
| 40 | address space. See partition.txt for more detail. | |
| 41 | ||
| 42 | Examples: | |
| 43 | ||
| 44 | gpmi-nand@8000c000 { | |
| 45 | compatible = "fsl,imx28-gpmi-nand"; | |
| 46 | #address-cells = <1>; | |
| 47 | #size-cells = <1>; | |
| 48 | reg = <0x8000c000 2000>, <0x8000a000 2000>; | |
| 49 | reg-names = "gpmi-nand", "bch"; | |
| 5fac0e18 SG |
50 | interrupts = <41>; |
| 51 | interrupt-names = "bch"; | |
| 52 | dmas = <&dma_apbh 4>; | |
| 53 | dma-names = "rx-tx"; | |
| e10db1f0 HS |
54 | |
| 55 | partition@0 { | |
| 56 | ... | |
| 57 | }; | |
| 58 | }; |