xref: /linux/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml (revision 42422993cf28d456778ee9168d73758ec037cd51) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/remoteproc/mtk,scp.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Mediatek SCP
8
9maintainers:
10  - Tinghan Shen <tinghan.shen@mediatek.com>
11
12description:
13  This binding provides support for ARM Cortex M4 Co-processor found on some
14  Mediatek SoCs.
15
16properties:
17  compatible:
18    enum:
19      - mediatek,mt8183-scp
20      - mediatek,mt8186-scp
21      - mediatek,mt8188-scp
22      - mediatek,mt8192-scp
23      - mediatek,mt8195-scp
24      - mediatek,mt8195-scp-dual
25
26  reg:
27    description:
28      Should contain the address ranges for memory regions SRAM, CFG, and,
29      on some platforms, L1TCM.
30    minItems: 2
31    maxItems: 3
32
33  reg-names:
34    minItems: 2
35    maxItems: 3
36
37  clocks:
38    description:
39      Clock for co-processor (see ../clock/clock-bindings.txt).
40      Required by mt8183 and mt8192.
41    maxItems: 1
42
43  clock-names:
44    const: main
45
46  interrupts:
47    maxItems: 1
48
49  firmware-name:
50    $ref: /schemas/types.yaml#/definitions/string
51    description:
52      If present, name (or relative path) of the file within the
53      firmware search path containing the firmware image used when
54      initializing SCP.
55
56  memory-region:
57    maxItems: 1
58
59  cros-ec-rpmsg:
60    $ref: /schemas/mfd/google,cros-ec.yaml
61    description:
62      This subnode represents the rpmsg device. The properties
63      of this node are defined by the individual bindings for
64      the rpmsg devices.
65
66    required:
67      - mediatek,rpmsg-name
68
69    unevaluatedProperties: false
70
71  '#address-cells':
72    const: 1
73
74  '#size-cells':
75    const: 1
76
77  ranges:
78    description:
79      Standard ranges definition providing address translations for
80      local SCP SRAM address spaces to bus addresses.
81
82patternProperties:
83  "^scp@[a-f0-9]+$":
84    type: object
85    description:
86      The MediaTek SCP integrated to SoC might be a multi-core version.
87      The other cores are represented as child nodes of the boot core.
88      There are some integration differences for the IP like the usage of
89      address translator for translating SoC bus addresses into address space
90      for the processor.
91
92      Each SCP core has own cache memory. The SRAM and L1TCM are shared by
93      cores. The power of cache, SRAM and L1TCM power should be enabled
94      before booting SCP cores. The size of cache, SRAM, and L1TCM are varied
95      on differnt SoCs.
96
97      The SCP cores do not use an MMU, but has a set of registers to
98      control the translations between 32-bit CPU addresses into system bus
99      addresses. Cache and memory access settings are provided through a
100      Memory Protection Unit (MPU), programmable only from the SCP.
101
102    properties:
103      compatible:
104        enum:
105          - mediatek,scp-core
106
107      reg:
108        description: The base address and size of SRAM.
109        maxItems: 1
110
111      reg-names:
112        const: sram
113
114      interrupts:
115        maxItems: 1
116
117      firmware-name:
118        $ref: /schemas/types.yaml#/definitions/string
119        description:
120          If present, name (or relative path) of the file within the
121          firmware search path containing the firmware image used when
122          initializing sub cores of multi-core SCP.
123
124      memory-region:
125        maxItems: 1
126
127      cros-ec-rpmsg:
128        $ref: /schemas/mfd/google,cros-ec.yaml
129        description:
130          This subnode represents the rpmsg device. The properties
131          of this node are defined by the individual bindings for
132          the rpmsg devices.
133
134        required:
135          - mediatek,rpmsg-name
136
137        unevaluatedProperties: false
138
139    required:
140      - compatible
141      - reg
142      - reg-names
143
144    additionalProperties: false
145
146required:
147  - compatible
148  - reg
149  - reg-names
150
151allOf:
152  - if:
153      properties:
154        compatible:
155          enum:
156            - mediatek,mt8183-scp
157            - mediatek,mt8192-scp
158    then:
159      required:
160        - clocks
161        - clock-names
162
163  - if:
164      properties:
165        compatible:
166          enum:
167            - mediatek,mt8183-scp
168            - mediatek,mt8186-scp
169            - mediatek,mt8188-scp
170    then:
171      properties:
172        reg:
173          maxItems: 2
174        reg-names:
175          items:
176            - const: sram
177            - const: cfg
178  - if:
179      properties:
180        compatible:
181          enum:
182            - mediatek,mt8192-scp
183            - mediatek,mt8195-scp
184    then:
185      properties:
186        reg:
187          maxItems: 3
188        reg-names:
189          items:
190            - const: sram
191            - const: cfg
192            - const: l1tcm
193  - if:
194      properties:
195        compatible:
196          enum:
197            - mediatek,mt8195-scp-dual
198    then:
199      properties:
200        reg:
201          maxItems: 2
202        reg-names:
203          items:
204            - const: cfg
205            - const: l1tcm
206
207additionalProperties: false
208
209examples:
210  - |
211    #include <dt-bindings/clock/mt8192-clk.h>
212
213    scp@10500000 {
214        compatible = "mediatek,mt8192-scp";
215        reg = <0x10500000 0x80000>,
216              <0x10700000 0x8000>,
217              <0x10720000 0xe0000>;
218        reg-names = "sram", "cfg", "l1tcm";
219        clocks = <&infracfg CLK_INFRA_SCPSYS>;
220        clock-names = "main";
221
222        cros-ec-rpmsg {
223            compatible = "google,cros-ec-rpmsg";
224            mediatek,rpmsg-name = "cros-ec-rpmsg";
225        };
226    };
227
228  - |
229    scp@10500000 {
230        compatible = "mediatek,mt8195-scp-dual";
231        reg = <0x10720000 0xe0000>,
232              <0x10700000 0x8000>;
233        reg-names = "cfg", "l1tcm";
234
235        #address-cells = <1>;
236        #size-cells = <1>;
237        ranges = <0 0x10500000 0x100000>;
238
239        scp@0 {
240            compatible = "mediatek,scp-core";
241            reg = <0x0 0xa0000>;
242            reg-names = "sram";
243
244            cros-ec-rpmsg {
245                compatible = "google,cros-ec-rpmsg";
246                mediatek,rpmsg-name = "cros-ec-rpmsg";
247            };
248        };
249
250        scp@a0000 {
251            compatible = "mediatek,scp-core";
252            reg = <0xa0000 0x20000>;
253            reg-names = "sram";
254
255            cros-ec-rpmsg {
256                compatible = "google,cros-ec-rpmsg";
257                mediatek,rpmsg-name = "cros-ec-rpmsg";
258            };
259        };
260    };
261