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-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
-
- - ti,nand-xfer-type: A string setting the data transfer type. One of:
-
- "prefetch-polled" Prefetch polled mode (default)
- "polled" Polled mode, without prefetch
- "prefetch-dma" Prefetch enabled sDMA mode
- "prefetch-irq" Prefetch enabled irq mode
-
- - 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";
- ti,nand-xfer-type = "polled";
-
- gpmc,sync-clk-ps = <0>;
- gpmc,cs-on-ns = <0>;
- gpmc,cs-rd-off-ns = <44>;
- gpmc,cs-wr-off-ns = <44>;
- gpmc,adv-on-ns = <6>;
- gpmc,adv-rd-off-ns = <34>;
- gpmc,adv-wr-off-ns = <44>;
- gpmc,we-off-ns = <40>;
- gpmc,oe-off-ns = <54>;
- gpmc,access-ns = <64>;
- gpmc,rd-cycle-ns = <82>;
- gpmc,wr-cycle-ns = <82>;
- gpmc,wr-access-ns = <40>;
- gpmc,wr-data-mux-bus-ns = <0>;
-
- #address-cells = <1>;
- #size-cells = <1>;
-
- /* partitions go here */
- };
- };
-