1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/arm,pl35x-smc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Arm PL35x Series Static Memory Controller (SMC)
8
9 maintainers:
10 - Miquel Raynal <miquel.raynal@bootlin.com>
11
12 description: |
13 The PL35x Static Memory Controller is a bus where you can connect two kinds
14 of memory interfaces, which are NAND and memory mapped interfaces (such as
15 SRAM or NOR) depending on the specific configuration.
16
17 The TRM is available here:
18 https://documentation-service.arm.com/static/5e8e2524fd977155116a58aa
19
20 # We need a select here so we don't match all nodes with 'arm,primecell'
21 select:
22 properties:
23 compatible:
24 contains:
25 enum:
26 - arm,pl353-smc-r2p1
27 - arm,pl354
28 required:
29 - compatible
30
31 properties:
32 $nodename:
33 pattern: "^memory-controller@[0-9a-f]+$"
34
35 compatible:
36 items:
37 - enum:
38 - arm,pl353-smc-r2p1
39 - arm,pl354
40 - const: arm,primecell
41
42 "#address-cells":
43 const: 2
44
45 "#size-cells":
46 const: 1
47
48 reg:
49 items:
50 - description:
51 Configuration registers for the host and sub-controllers.
52 The three chip select regions are defined in 'ranges'.
53
54 clocks:
55 minItems: 1
56 maxItems: 2
57
58 clock-names:
59 minItems: 1
60 maxItems: 2
61
62 ranges:
63 minItems: 1
64 maxItems: 8
65
66 interrupts:
67 minItems: 1
68 items:
69 - description: Combined or Memory interface 0 IRQ
70 - description: Memory interface 1 IRQ
71
72 patternProperties:
73 "@[0-7],[a-f0-9]+$":
74 type: object
75 additionalProperties: true
76 description: |
77 The child device node represents the controller connected to the SMC
78 bus. The controller can be a NAND controller or a pair of any memory
79 mapped controllers such as NOR and SRAM controllers.
80
81 properties:
82 compatible:
83 description:
84 Compatible of memory controller.
85
86 reg:
87 items:
88 - items:
89 - description: |
90 Chip-select ID, as in the parent range property.
91 minimum: 0
92 maximum: 7
93 - description: |
94 Offset of the memory region requested by the device.
95 - description: |
96 Length of the memory region requested by the device.
97
98 required:
99 - compatible
100 - reg
101
102 required:
103 - compatible
104 - reg
105 - clock-names
106 - clocks
107
108 additionalProperties: false
109
110 allOf:
111 - if:
112 properties:
113 compatible:
114 contains:
115 const: arm,pl354
116 then:
117 properties:
118 clocks:
119 # According to TRM, really should be 3 clocks
120 maxItems: 1
121
122 clock-names:
123 const: apb_pclk
124
125 else:
126 properties:
127 clocks:
128 items:
129 - description: clock for the memory device bus
130 - description: main clock of the SMC
131
132 clock-names:
133 items:
134 - const: memclk
135 - const: apb_pclk
136
137 examples:
138 - |
139 smcc: memory-controller@e000e000 {
140 compatible = "arm,pl353-smc-r2p1", "arm,primecell";
141 reg = <0xe000e000 0x0001000>;
142 clock-names = "memclk", "apb_pclk";
143 clocks = <&clkc 11>, <&clkc 44>;
144 ranges = <0x0 0x0 0xe1000000 0x1000000 /* Nand CS region */
145 0x1 0x0 0xe2000000 0x2000000 /* SRAM/NOR CS0 region */
146 0x2 0x0 0xe4000000 0x2000000>; /* SRAM/NOR CS1 region */
147 #address-cells = <2>;
148 #size-cells = <1>;
149
150 nfc0: nand-controller@0,0 {
151 compatible = "arm,pl353-nand-r2p1";
152 reg = <0 0 0x1000000>;
153 #address-cells = <1>;
154 #size-cells = <0>;
155 };
156 };
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