1NAND Flash
2----------
3
4(there isn't yet a generic binding in Linux, so this describes what is in
5U-Boot. There should not be Linux-specific or U-Boot specific binding, just
6a binding that describes this hardware. But agreeing a binding in Linux in
7the absence of a driver may be beyond my powers.)
8
9The device node for a NAND flash device is as follows:
10
11Required properties :
12 - compatible : Should be "manufacturer,device", "nand-flash"
13
14This node should sit inside its controller.
15
16
17Nvidia NAND Controller
18----------------------
19
20The device node for a NAND flash controller is as follows:
21
22Optional properties:
23
24nvidia,wp-gpios : GPIO of write-protect line, three cells in the format:
25		phandle, parameter, flags
26nvidia,nand-width : bus width of the NAND device in bits
27
28 - nvidia,nand-timing : Timing parameters for the NAND. Each is in ns.
29	Order is: MAX_TRP_TREA, TWB, Max(tCS, tCH, tALS, tALH),
30	TWHR, Max(tCS, tCH, tALS, tALH), TWH, TWP, TRH, TADL
31
32	MAX_TRP_TREA is:
33		non-EDO mode: Max(tRP, tREA) + 6ns
34		EDO mode: tRP timing
35
36The 'reg' property should provide the chip select used by the flash chip.
37
38
39Example
40-------
41
42nand-controller@0x70008000 {
43	compatible = "nvidia,tegra20-nand";
44	#address-cells = <1>;
45	#size-cells = <0>;
46	nvidia,wp-gpios = <&gpio 59 0>;		/* PH3 */
47	nvidia,nand-width = <8>;
48	nvidia,timing = <26 100 20 80 20 10 12 10 70>;
49	nand@0 {
50		reg = <0>;
51		compatible = "hynix,hy27uf4g2b", "nand-flash";
52	};
53};
54