1NVIDIA Tegra NAND Flash controller 2 3Required properties: 4- compatible: Must be one of: 5 - "nvidia,tegra20-nand" 6- reg: MMIO address range 7- interrupts: interrupt output of the NFC controller 8- clocks: Must contain an entry for each entry in clock-names. 9 See ../clocks/clock-bindings.txt for details. 10- clock-names: Must include the following entries: 11 - nand 12- resets: Must contain an entry for each entry in reset-names. 13 See ../reset/reset.txt for details. 14- reset-names: Must include the following entries: 15 - nand 16 17Optional children nodes: 18Individual NAND chips are children of the NAND controller node. Currently 19only one NAND chip supported. 20 21Required children node properties: 22- reg: An integer ranging from 1 to 6 representing the CS line to use. 23 24Optional children node properties: 25- nand-ecc-mode: String, operation mode of the NAND ecc mode. Currently only 26 "hw" is supported. 27- nand-ecc-algo: string, algorithm of NAND ECC. 28 Supported values with "hw" ECC mode are: "rs", "bch". 29- nand-bus-width : See nand-controller.yaml 30- nand-on-flash-bbt: See nand-controller.yaml 31- nand-ecc-strength: integer representing the number of bits to correct 32 per ECC step (always 512). Supported strength using HW ECC 33 modes are: 34 - RS: 4, 6, 8 35 - BCH: 4, 8, 14, 16 36- nand-ecc-maximize: See nand-controller.yaml 37- nand-is-boot-medium: Makes sure only ECC strengths supported by the boot ROM 38 are chosen. 39- wp-gpios: GPIO specifier for the write protect pin. 40 41Optional child node of NAND chip nodes: 42Partitions: see partition.txt 43 44 Example: 45 nand-controller@70008000 { 46 compatible = "nvidia,tegra20-nand"; 47 reg = <0x70008000 0x100>; 48 interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>; 49 clocks = <&tegra_car TEGRA20_CLK_NDFLASH>; 50 clock-names = "nand"; 51 resets = <&tegra_car 13>; 52 reset-names = "nand"; 53 54 nand@0 { 55 reg = <0>; 56 #address-cells = <1>; 57 #size-cells = <1>; 58 nand-bus-width = <8>; 59 nand-on-flash-bbt; 60 nand-ecc-algo = "bch"; 61 nand-ecc-strength = <8>; 62 wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>; 63 }; 64 }; 65