Lines Matching +full:nand +full:- +full:ecc +full:- +full:strength

1 * Ingenic JZ4780 NAND/ECC
3 This file documents the device tree bindings for NAND flash devices on the
4 JZ4780. NAND devices are connected to the NEMC controller (described in
5 memory-controllers/ingenic,jz4780-nemc.txt), and thus NAND device nodes must
8 Required NAND controller device properties:
9 - compatible: Should be one of:
10   * ingenic,jz4740-nand
11   * ingenic,jz4725b-nand
12   * ingenic,jz4780-nand
13 - reg: For each bank with a NAND chip attached, should specify a bank number,
16 Optional NAND controller device properties:
17 - ecc-engine: To make use of the hardware ECC controller, this
18   property must contain a phandle for the ECC controller node. The required
20   software ECC will be used instead.
23 - Individual NAND chips are children of the NAND controller node.
26 - reg: An integer ranging from 1 to 6 representing the CS line to use.
29 - nand-ecc-step-size: ECC block size in bytes.
30 - nand-ecc-strength: ECC strength (max number of correctable bits).
31 - nand-ecc-mode: String, operation mode of the NAND ecc mode. "hw" by default
32 - nand-on-flash-bbt: boolean to enable on flash bbt option, if not present false
33 - rb-gpios: GPIO specifier for the busy pin.
34 - wp-gpios: GPIO specifier for the write protect pin.
36 Optional child node of NAND chip nodes:
37 - partitions: see Documentation/devicetree/bindings/mtd/partition.txt
44 	nandc: nand-controller@1 {
45 		compatible = "ingenic,jz4780-nand";
48 		#address-cells = <1>;
49 		#size-cells = <0>;
51 		ecc-engine = <&bch>;
53 		nand@1 {
56 			nand-ecc-step-size = <1024>;
57 			nand-ecc-strength = <24>;
58 			nand-ecc-mode = "hw";
59 			nand-on-flash-bbt;
61 			rb-gpios = <&gpa 20 GPIO_ACTIVE_LOW>;
62 			wp-gpios = <&gpf 22 GPIO_ACTIVE_LOW>;
65 				#address-cells = <2>;
66 				#size-cells = <2>;
73 The ECC controller is a separate SoC component used for error correction on
74 NAND devices. The following is a description of the device properties for a
75 ECC controller.
77 Required ECC properties:
78 - compatible: Should be one of:
79   * ingenic,jz4740-ecc
80   * ingenic,jz4725b-bch
81   * ingenic,jz4780-bch
82 - reg: Should specify the ECC controller registers location and length.
83 - clocks: Clock for the ECC controller.
88 	compatible = "ingenic,jz4780-bch";