| Huang Shijie | e10db1f | 2012-05-04 21:42:05 -0400 | [diff] [blame] | 1 | * Freescale General-Purpose Media Interface (GPMI) |
| 2 | |
| 3 | The GPMI nand controller provides an interface to control the |
| 4 | NAND flash chips. We support only one NAND chip now. |
| 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" |
| Shawn Guo | 5fac0e1 | 2013-02-26 11:44:28 +0800 | [diff] [blame] | 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". |
| Huang Shijie | e10db1f | 2012-05-04 21:42:05 -0400 | [diff] [blame] | 16 | |
| Huang Shijie | c50c694 | 2012-07-03 16:24:32 +0800 | [diff] [blame] | 17 | Optional properties: |
| 18 | - nand-on-flash-bbt: boolean to enable on flash bbt option if not |
| 19 | present false |
| Huang Shijie | 89b59e6 | 2013-11-07 18:07:38 +0800 | [diff] [blame] | 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. |
| Huang Shijie | c50c694 | 2012-07-03 16:24:32 +0800 | [diff] [blame] | 28 | |
| Huang Shijie | e10db1f | 2012-05-04 21:42:05 -0400 | [diff] [blame] | 29 | The device tree may optionally contain sub-nodes describing partitions of the |
| 30 | address space. See partition.txt for more detail. |
| 31 | |
| 32 | Examples: |
| 33 | |
| 34 | gpmi-nand@8000c000 { |
| 35 | compatible = "fsl,imx28-gpmi-nand"; |
| 36 | #address-cells = <1>; |
| 37 | #size-cells = <1>; |
| 38 | reg = <0x8000c000 2000>, <0x8000a000 2000>; |
| 39 | reg-names = "gpmi-nand", "bch"; |
| Shawn Guo | 5fac0e1 | 2013-02-26 11:44:28 +0800 | [diff] [blame] | 40 | interrupts = <41>; |
| 41 | interrupt-names = "bch"; |
| 42 | dmas = <&dma_apbh 4>; |
| 43 | dma-names = "rx-tx"; |
| Huang Shijie | e10db1f | 2012-05-04 21:42:05 -0400 | [diff] [blame] | 44 | |
| 45 | partition@0 { |
| 46 | ... |
| 47 | }; |
| 48 | }; |