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Diffstat (limited to 'Documentation/devicetree/bindings/mtd/gpmc-nand.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt new file mode 100644 index 000000000000..e7f8d7ed47eb --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt @@ -0,0 +1,80 @@ +Device tree bindings for GPMC connected NANDs + +GPMC connected NAND (found on OMAP boards) are represented as child nodes of +the GPMC controller with a name of "nand". + +All timing relevant properties as well as generic gpmc child properties are +explained in a separate documents - please refer to +Documentation/devicetree/bindings/bus/ti-gpmc.txt + +For NAND specific properties such as ECC modes or bus width, please refer to +Documentation/devicetree/bindings/mtd/nand.txt + + +Required properties: + + - reg: The CS line the peripheral is connected to + +Optional properties: + + - nand-bus-width: Set this numeric value to 16 if the hardware + is wired that way. If not specified, a bus + width of 8 is assumed. + + - ti,nand-ecc-opt: A string setting the ECC layout to use. One of: + + "sw" Software method (default) + "hw" Hardware method + "hw-romcode" gpmc hamming mode method & romcode layout + "bch4" 4-bit BCH ecc code + "bch8" 8-bit BCH ecc code + + - elm_id: Specifies elm device node. This is required to support BCH + error correction using ELM module. + +For inline partiton table parsing (optional): + + - #address-cells: should be set to 1 + - #size-cells: should be set to 1 + +Example for an AM33xx board: + + gpmc: gpmc@50000000 { + compatible = "ti,am3352-gpmc"; + ti,hwmods = "gpmc"; + reg = <0x50000000 0x1000000>; + interrupts = <100>; + gpmc,num-cs = <8>; + gpmc,num-waitpins = <2>; + #address-cells = <2>; + #size-cells = <1>; + ranges = <0 0 0x08000000 0x2000>; /* CS0: NAND */ + elm_id = <&elm>; + + nand@0,0 { + reg = <0 0 0>; /* CS0, offset 0 */ + nand-bus-width = <16>; + ti,nand-ecc-opt = "bch8"; + + gpmc,sync-clk = <0>; + gpmc,cs-on = <0>; + gpmc,cs-rd-off = <44>; + gpmc,cs-wr-off = <44>; + gpmc,adv-on = <6>; + gpmc,adv-rd-off = <34>; + gpmc,adv-wr-off = <44>; + gpmc,we-off = <40>; + gpmc,oe-off = <54>; + gpmc,access = <64>; + gpmc,rd-cycle = <82>; + gpmc,wr-cycle = <82>; + gpmc,wr-access = <40>; + gpmc,wr-data-mux-bus = <0>; + + #address-cells = <1>; + #size-cells = <1>; + + /* partitions go here */ + }; + }; + |