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Linux kernel mirror (for testing)
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1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/memory-controllers/exynos-srom.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung Exynos SoC SROM Controller driver
8
9maintainers:
10 - Krzysztof Kozlowski <krzk@kernel.org>
11
12description: |+
13 The SROM controller can be used to attach external peripherals. In this case
14 extra properties, describing the bus behind it, should be specified.
15
16properties:
17 compatible:
18 items:
19 - const: samsung,exynos4210-srom
20
21 reg:
22 maxItems: 1
23
24 "#address-cells":
25 const: 2
26
27 "#size-cells":
28 const: 1
29
30 ranges:
31 minItems: 1
32 maxItems: 4
33 description: |
34 Reflects the memory layout with four integer values per bank. Format:
35 <bank-number> 0 <parent address of bank> <size>
36 Up to four banks are supported.
37
38patternProperties:
39 "^.*@[0-3],[a-f0-9]+$":
40 type: object
41 $ref: mc-peripheral-props.yaml#
42 additionalProperties: true
43
44 properties:
45 reg-io-width:
46 enum: [1, 2]
47 description:
48 Data width in bytes (1 or 2). If omitted, default of 1 is used.
49
50 required:
51 - samsung,srom-timing
52
53required:
54 - compatible
55 - reg
56
57additionalProperties: false
58
59examples:
60 - |
61 // Example: basic definition, no banks are configured
62 memory-controller@12560000 {
63 compatible = "samsung,exynos4210-srom";
64 reg = <0x12560000 0x14>;
65 };
66
67 - |
68 // Example: SROMc with SMSC911x ethernet chip on bank 3
69 memory-controller@12570000 {
70 #address-cells = <2>;
71 #size-cells = <1>;
72 ranges = <0 0 0x04000000 0x20000 // Bank0
73 1 0 0x05000000 0x20000 // Bank1
74 2 0 0x06000000 0x20000 // Bank2
75 3 0 0x07000000 0x20000>; // Bank3
76
77 compatible = "samsung,exynos4210-srom";
78 reg = <0x12570000 0x14>;
79
80 ethernet@3,0 {
81 compatible = "smsc,lan9115";
82 reg = <3 0 0x10000>; // Bank 3, offset = 0
83 phy-mode = "mii";
84 interrupt-parent = <&gpx0>;
85 interrupts = <5 8>;
86 reg-io-width = <2>;
87 smsc,irq-push-pull;
88 smsc,force-internal-phy;
89
90 samsung,srom-page-mode;
91 samsung,srom-timing = <9 12 1 9 1 1>;
92 };
93 };