blob: b2f2ca12f9e64bb152f6f175719e355275067ced (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
NVIDIA Tegra NAND Flash controller
Required properties:
- compatible: Must be one of:
- "nvidia,tegra20-nand"
- reg: MMIO address range
- interrupts: interrupt output of the NFC controller
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- nand
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- nand
Optional children nodes:
Individual NAND chips are children of the NAND controller node. Currently
only one NAND chip supported.
Required children node properties:
- reg: An integer ranging from 1 to 6 representing the CS line to use.
Optional children node properties:
- nand-ecc-mode: String, operation mode of the NAND ecc mode. Currently only
"hw" is supported.
- nand-ecc-algo: string, algorithm of NAND ECC.
Supported values with "hw" ECC mode are: "rs", "bch".
- nand-bus-width : See nand.txt
- nand-on-flash-bbt: See nand.txt
- nand-ecc-strength: integer representing the number of bits to correct
per ECC step (always 512). Supported strength using HW ECC
modes are:
- RS: 4, 6, 8
- BCH: 4, 8, 14, 16
- nand-ecc-maximize: See nand.txt
- nand-is-boot-medium: Makes sure only ECC strengths supported by the boot ROM
are chosen.
- wp-gpios: GPIO specifier for the write protect pin.
Optional child node of NAND chip nodes:
Partitions: see partition.txt
Example:
nand-controller@70008000 {
compatible = "nvidia,tegra20-nand";
reg = <0x70008000 0x100>;
interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&tegra_car TEGRA20_CLK_NDFLASH>;
clock-names = "nand";
resets = <&tegra_car 13>;
reset-names = "nand";
nand@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <1>;
nand-bus-width = <8>;
nand-on-flash-bbt;
nand-ecc-algo = "bch";
nand-ecc-strength = <8>;
wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>;
};
};
|
