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- NAND Flash
- ----------
- (there isn't yet a generic binding in Linux, so this describes what is in
- U-Boot. There should not be Linux-specific or U-Boot specific binding, just
- a binding that describes this hardware. But agreeing a binding in Linux in
- the absence of a driver may be beyond my powers.)
- The device node for a NAND flash device is as follows:
- Required properties :
- - compatible : Should be "manufacturer,device", "nand-flash"
- This node should sit inside its controller.
- Nvidia NAND Controller
- ----------------------
- The device node for a NAND flash controller is as follows:
- Optional properties:
- nvidia,wp-gpios : GPIO of write-protect line, three cells in the format:
- phandle, parameter, flags
- nvidia,nand-width : bus width of the NAND device in bits
- - nvidia,nand-timing : Timing parameters for the NAND. Each is in ns.
- Order is: MAX_TRP_TREA, TWB, Max(tCS, tCH, tALS, tALH),
- TWHR, Max(tCS, tCH, tALS, tALH), TWH, TWP, TRH, TADL
- MAX_TRP_TREA is:
- non-EDO mode: Max(tRP, tREA) + 6ns
- EDO mode: tRP timing
- The 'reg' property should provide the chip select used by the flash chip.
- Example
- -------
- nand-controller@0x70008000 {
- compatible = "nvidia,tegra20-nand";
- #address-cells = <1>;
- #size-cells = <0>;
- nvidia,wp-gpios = <&gpio 59 0>; /* PH3 */
- nvidia,nand-width = <8>;
- nvidia,timing = <26 100 20 80 20 10 12 10 70>;
- nand@0 {
- reg = <0>;
- compatible = "hynix,hy27uf4g2b", "nand-flash";
- };
- };
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