xref: /linux/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml (revision cf36ae3e5802716617b9e4d902a31048240396b0) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra186-mc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NVIDIA Tegra186 (and later) SoC Memory Controller
8
9maintainers:
10  - Jon Hunter <jonathanh@nvidia.com>
11  - Thierry Reding <thierry.reding@gmail.com>
12
13description: |
14  The NVIDIA Tegra186 SoC features a 128 bit memory controller that is split
15  into four 32 bit channels to support LPDDR4 with x16 subpartitions. The MC
16  handles memory requests for 40-bit virtual addresses from internal clients
17  and arbitrates among them to allocate memory bandwidth.
18
19  Up to 15 GiB of physical memory can be supported. Security features such as
20  encryption of traffic to and from DRAM via general security apertures are
21  available for video and other secure applications, as well as DRAM ECC for
22  automotive safety applications (single bit error correction and double bit
23  error detection).
24
25properties:
26  $nodename:
27    pattern: "^memory-controller@[0-9a-f]+$"
28
29  compatible:
30    items:
31      - enum:
32          - nvidia,tegra186-mc
33          - nvidia,tegra194-mc
34          - nvidia,tegra234-mc
35
36  reg:
37    minItems: 6
38    maxItems: 18
39
40  reg-names:
41    minItems: 6
42    maxItems: 18
43
44  interrupts:
45    items:
46      - description: MC general interrupt
47
48  "#address-cells":
49    const: 2
50
51  "#size-cells":
52    const: 2
53
54  ranges: true
55
56  dma-ranges: true
57
58  "#interconnect-cells":
59    const: 1
60
61patternProperties:
62  "^external-memory-controller@[0-9a-f]+$":
63    description:
64      The bulk of the work involved in controlling the external memory
65      controller on NVIDIA Tegra186 and later is performed on the BPMP. This
66      coprocessor exposes the EMC clock that is used to set the frequency at
67      which the external memory is clocked and a remote procedure call that
68      can be used to obtain the set of available frequencies.
69    type: object
70    properties:
71      compatible:
72        items:
73          - enum:
74              - nvidia,tegra186-emc
75              - nvidia,tegra194-emc
76              - nvidia,tegra234-emc
77
78      reg:
79        minItems: 1
80        maxItems: 2
81
82      interrupts:
83        items:
84          - description: EMC general interrupt
85
86      clocks:
87        items:
88          - description: external memory clock
89
90      clock-names:
91        items:
92          - const: emc
93
94      "#interconnect-cells":
95        const: 0
96
97      nvidia,bpmp:
98        $ref: /schemas/types.yaml#/definitions/phandle
99        description:
100          phandle of the node representing the BPMP
101
102    allOf:
103      - if:
104          properties:
105            compatible:
106              const: nvidia,tegra186-emc
107        then:
108          properties:
109            reg:
110              maxItems: 1
111
112      - if:
113          properties:
114            compatible:
115              const: nvidia,tegra194-emc
116        then:
117          properties:
118            reg:
119              minItems: 2
120
121      - if:
122          properties:
123            compatible:
124              const: nvidia,tegra234-emc
125        then:
126          properties:
127            reg:
128              minItems: 2
129
130    additionalProperties: false
131
132    required:
133      - compatible
134      - reg
135      - interrupts
136      - clocks
137      - clock-names
138      - "#interconnect-cells"
139      - nvidia,bpmp
140
141allOf:
142  - if:
143      properties:
144        compatible:
145          const: nvidia,tegra186-mc
146    then:
147      properties:
148        reg:
149          maxItems: 6
150          description: 5 memory controller channels and 1 for stream-id registers
151
152        reg-names:
153          items:
154            - const: sid
155            - const: broadcast
156            - const: ch0
157            - const: ch1
158            - const: ch2
159            - const: ch3
160
161  - if:
162      properties:
163        compatible:
164          const: nvidia,tegra194-mc
165    then:
166      properties:
167        reg:
168          minItems: 18
169          description: 17 memory controller channels and 1 for stream-id registers
170
171        reg-names:
172          items:
173            - const: sid
174            - const: broadcast
175            - const: ch0
176            - const: ch1
177            - const: ch2
178            - const: ch3
179            - const: ch4
180            - const: ch5
181            - const: ch6
182            - const: ch7
183            - const: ch8
184            - const: ch9
185            - const: ch10
186            - const: ch11
187            - const: ch12
188            - const: ch13
189            - const: ch14
190            - const: ch15
191
192  - if:
193      properties:
194        compatible:
195          const: nvidia,tegra234-mc
196    then:
197      properties:
198        reg:
199          minItems: 18
200          description: 17 memory controller channels and 1 for stream-id registers
201
202        reg-names:
203          items:
204            - const: sid
205            - const: broadcast
206            - const: ch0
207            - const: ch1
208            - const: ch2
209            - const: ch3
210            - const: ch4
211            - const: ch5
212            - const: ch6
213            - const: ch7
214            - const: ch8
215            - const: ch9
216            - const: ch10
217            - const: ch11
218            - const: ch12
219            - const: ch13
220            - const: ch14
221            - const: ch15
222
223additionalProperties: false
224
225required:
226  - compatible
227  - reg
228  - reg-names
229  - interrupts
230  - "#address-cells"
231  - "#size-cells"
232
233examples:
234  - |
235    #include <dt-bindings/clock/tegra186-clock.h>
236    #include <dt-bindings/interrupt-controller/arm-gic.h>
237
238    bus {
239        #address-cells = <2>;
240        #size-cells = <2>;
241
242        memory-controller@2c00000 {
243            compatible = "nvidia,tegra186-mc";
244            reg = <0x0 0x02c00000 0x0 0x10000>,    /* MC-SID */
245                  <0x0 0x02c10000 0x0 0x10000>,    /* Broadcast channel */
246                  <0x0 0x02c20000 0x0 0x10000>,    /* MC0 */
247                  <0x0 0x02c30000 0x0 0x10000>,    /* MC1 */
248                  <0x0 0x02c40000 0x0 0x10000>,    /* MC2 */
249                  <0x0 0x02c50000 0x0 0x10000>;    /* MC3 */
250            reg-names = "sid", "broadcast", "ch0", "ch1", "ch2", "ch3";
251            interrupts = <GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>;
252
253            #address-cells = <2>;
254            #size-cells = <2>;
255
256            ranges = <0x0 0x02c00000 0x0 0x02c00000 0x0 0xb0000>;
257
258            /*
259             * Memory clients have access to all 40 bits that the memory
260             * controller can address.
261             */
262            dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x0>;
263
264            external-memory-controller@2c60000 {
265                compatible = "nvidia,tegra186-emc";
266                reg = <0x0 0x02c60000 0x0 0x50000>;
267                interrupts = <GIC_SPI 224 IRQ_TYPE_LEVEL_HIGH>;
268                clocks = <&bpmp TEGRA186_CLK_EMC>;
269                clock-names = "emc";
270
271                #interconnect-cells = <0>;
272
273                nvidia,bpmp = <&bpmp>;
274            };
275        };
276    };
277