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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
# 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)
maintainers:
- Han Xu <han.xu@nxp.com>
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 mtd.yaml for
more detail.
properties:
compatible:
oneOf:
- enum:
- fsl,imx23-gpmi-nand
- fsl,imx28-gpmi-nand
- fsl,imx6q-gpmi-nand
- fsl,imx6sx-gpmi-nand
- fsl,imx7d-gpmi-nand
- items:
- enum:
- fsl,imx8mm-gpmi-nand
- fsl,imx8mn-gpmi-nand
- const: 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
clock-names:
minItems: 1
maxItems: 5
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
allOf:
- $ref: nand-controller.yaml
- if:
properties:
compatible:
contains:
enum:
- fsl,imx23-gpmi-nand
- fsl,imx28-gpmi-nand
then:
properties:
clocks:
items:
- description: SoC gpmi io clock
clock-names:
items:
- const: gpmi_io
- if:
properties:
compatible:
contains:
enum:
- fsl,imx6q-gpmi-nand
- fsl,imx6sx-gpmi-nand
then:
properties:
clocks:
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:
items:
- const: gpmi_io
- const: gpmi_apb
- const: gpmi_bch
- const: gpmi_bch_apb
- const: per1_bch
- if:
properties:
compatible:
contains:
const: fsl,imx7d-gpmi-nand
then:
properties:
clocks:
items:
- description: SoC gpmi io clock
- description: SoC gpmi bch apb clock
clock-names:
items:
- const: gpmi_io
- const: gpmi_bch_apb
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";
};
|
