0001 NVIDIA Tegra NAND Flash controller
0002
0003 Required properties:
0004 - compatible: Must be one of:
0005 - "nvidia,tegra20-nand"
0006 - reg: MMIO address range
0007 - interrupts: interrupt output of the NFC controller
0008 - clocks: Must contain an entry for each entry in clock-names.
0009 See ../clocks/clock-bindings.txt for details.
0010 - clock-names: Must include the following entries:
0011 - nand
0012 - resets: Must contain an entry for each entry in reset-names.
0013 See ../reset/reset.txt for details.
0014 - reset-names: Must include the following entries:
0015 - nand
0016
0017 Optional children nodes:
0018 Individual NAND chips are children of the NAND controller node. Currently
0019 only one NAND chip supported.
0020
0021 Required children node properties:
0022 - reg: An integer ranging from 1 to 6 representing the CS line to use.
0023
0024 Optional children node properties:
0025 - nand-ecc-mode: String, operation mode of the NAND ecc mode. Currently only
0026 "hw" is supported.
0027 - nand-ecc-algo: string, algorithm of NAND ECC.
0028 Supported values with "hw" ECC mode are: "rs", "bch".
0029 - nand-bus-width : See nand-controller.yaml
0030 - nand-on-flash-bbt: See nand-controller.yaml
0031 - nand-ecc-strength: integer representing the number of bits to correct
0032 per ECC step (always 512). Supported strength using HW ECC
0033 modes are:
0034 - RS: 4, 6, 8
0035 - BCH: 4, 8, 14, 16
0036 - nand-ecc-maximize: See nand-controller.yaml
0037 - nand-is-boot-medium: Makes sure only ECC strengths supported by the boot ROM
0038 are chosen.
0039 - wp-gpios: GPIO specifier for the write protect pin.
0040
0041 Optional child node of NAND chip nodes:
0042 Partitions: see partition.txt
0043
0044 Example:
0045 nand-controller@70008000 {
0046 compatible = "nvidia,tegra20-nand";
0047 reg = <0x70008000 0x100>;
0048 interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
0049 clocks = <&tegra_car TEGRA20_CLK_NDFLASH>;
0050 clock-names = "nand";
0051 resets = <&tegra_car 13>;
0052 reset-names = "nand";
0053
0054 nand@0 {
0055 reg = <0>;
0056 #address-cells = <1>;
0057 #size-cells = <1>;
0058 nand-bus-width = <8>;
0059 nand-on-flash-bbt;
0060 nand-ecc-algo = "bch";
0061 nand-ecc-strength = <8>;
0062 wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>;
0063 };
0064 };
