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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mtd/gpmi-nand.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale General-Purpose Media Interface (GPMI) binding
maintainers:
- Han Xu <han.xu@nxp.com>
allOf:
- $ref: "nand-controller.yaml"
description: |
The GPMI nand controller provides an interface to control the NAND
flash chips. The device tree may optionally contain sub-nodes
describing partitions of the address space. See partition.txt for
more detail.
properties:
compatible:
enum:
- fsl,imx23-gpmi-nand
- fsl,imx28-gpmi-nand
- fsl,imx6q-gpmi-nand
- fsl,imx6sx-gpmi-nand
- fsl,imx7d-gpmi-nand
reg:
items:
- description: Address and length of gpmi block.
- description: Address and length of bch block.
reg-names:
items:
- const: gpmi-nand
- const: bch
interrupts:
maxItems: 1
interrupt-names:
const: bch
dmas:
maxItems: 1
dma-names:
const: rx-tx
clocks:
minItems: 1
maxItems: 5
items:
- description: SoC gpmi io clock
- description: SoC gpmi apb clock
- description: SoC gpmi bch clock
- description: SoC gpmi bch apb clock
- description: SoC per1 bch clock
clock-names:
minItems: 1
maxItems: 5
items:
- const: gpmi_io
- const: gpmi_apb
- const: gpmi_bch
- const: gpmi_bch_apb
- const: per1_bch
fsl,use-minimum-ecc:
type: boolean
description: |
Protect this NAND flash with the minimum ECC strength required.
The required ECC strength is automatically discoverable for some
flash (e.g., according to the ONFI standard). However, note that
if this strength is not discoverable or this property is not enabled,
the software may chooses an implementation-defined ECC scheme.
fsl,no-blockmark-swap:
type: boolean
description: |
Don't swap the bad block marker from the OOB area with the byte in
the data area but rely on the flash based BBT for identifying bad blocks.
NOTE: this is only valid in conjunction with 'nand-on-flash-bbt'.
WARNING: on i.MX28 blockmark swapping cannot be disabled for the BootROM
in the FCB. Thus, partitions written from Linux with this feature turned
on may not be accessible by the BootROM code.
required:
- compatible
- reg
- reg-names
- interrupts
- interrupt-names
- clocks
- clock-names
- dmas
- dma-names
unevaluatedProperties: false
examples:
- |
nand-controller@8000c000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx28-gpmi-nand";
reg = <0x8000c000 0x2000>, <0x8000a000 0x2000>;
reg-names = "gpmi-nand", "bch";
interrupts = <41>;
interrupt-names = "bch";
clocks = <&clks 50>;
clock-names = "gpmi_io";
dmas = <&dma_apbh 4>;
dma-names = "rx-tx";
};
|
