1 NAND Flash 2 ---------- 3 4 (there isn't yet a generic binding in Linux, so this describes what is in 5 U-Boot. There should not be Linux-specific or U-Boot specific binding, just 6 a binding that describes this hardware. But agreeing a binding in Linux in 7 the absence of a driver may be beyond my powers.) 8 9 The device node for a NAND flash device is as follows: 10 11 Required properties : 12 - compatible : Should be "manufacturer,device", "nand-flash" 13 14 This node should sit inside its controller. 15 16 17 Nvidia NAND Controller 18 ---------------------- 19 20 The device node for a NAND flash controller is as follows: 21 22 Optional properties: 23 24 nvidia,wp-gpios : GPIO of write-protect line, three cells in the format: 25 phandle, parameter, flags 26 nvidia,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 36 The 'reg' property should provide the chip select used by the flash chip. 37 38 39 Example 40 ------- 41 42 nand-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
