1 # SPDX-License-Identifier: (GPL-2.0-only OR BS
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/clock/samsu
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: Samsung Exynos Auto v9 SoC clock contro
8
9 maintainers:
10 - Chanho Park <chanho61.park@samsung.com>
11 - Chanwoo Choi <cw00.choi@samsung.com>
12 - Krzysztof Kozlowski <krzk@kernel.org>
13 - Sylwester Nawrocki <s.nawrocki@samsung.com>
14 - Tomasz Figa <tomasz.figa@gmail.com>
15
16 description: |
17 Exynos Auto v9 clock controller is comprised
18 clocks for different domains. Those CMU unit
19 tree nodes, and might depend on each other.
20 two external clocks:: OSCCLK/XTCXO (26 MHz)
21 The external OSCCLK must be defined as fixed
22
23 CMU_TOP is a top-level CMU, where all base c
24 dividers; all other clocks of function block
25 derived from CMU_TOP.
26
27 Each clock is assigned an identifier and cli
28 to specify the clock which they consume. All
29 in clock consumer nodes are defined as prepr
30 'include/dt-bindings/clock/samsung,exynosaut
31
32 properties:
33 compatible:
34 enum:
35 - samsung,exynosautov9-cmu-top
36 - samsung,exynosautov9-cmu-busmc
37 - samsung,exynosautov9-cmu-core
38 - samsung,exynosautov9-cmu-dpum
39 - samsung,exynosautov9-cmu-fsys0
40 - samsung,exynosautov9-cmu-fsys1
41 - samsung,exynosautov9-cmu-fsys2
42 - samsung,exynosautov9-cmu-peric0
43 - samsung,exynosautov9-cmu-peric1
44 - samsung,exynosautov9-cmu-peris
45
46 clocks:
47 minItems: 1
48 maxItems: 5
49
50 clock-names:
51 minItems: 1
52 maxItems: 5
53
54 "#clock-cells":
55 const: 1
56
57 reg:
58 maxItems: 1
59
60 allOf:
61 - if:
62 properties:
63 compatible:
64 contains:
65 const: samsung,exynosautov9-cmu-to
66
67 then:
68 properties:
69 clocks:
70 items:
71 - description: External reference
72
73 clock-names:
74 items:
75 - const: oscclk
76
77 - if:
78 properties:
79 compatible:
80 contains:
81 const: samsung,exynosautov9-cmu-bu
82
83 then:
84 properties:
85 clocks:
86 items:
87 - description: External reference
88 - description: CMU_BUSMC bus clock
89
90 clock-names:
91 items:
92 - const: oscclk
93 - const: dout_clkcmu_busmc_bus
94
95 - if:
96 properties:
97 compatible:
98 contains:
99 const: samsung,exynosautov9-cmu-co
100
101 then:
102 properties:
103 clocks:
104 items:
105 - description: External reference
106 - description: CMU_CORE bus clock
107
108 clock-names:
109 items:
110 - const: oscclk
111 - const: dout_clkcmu_core_bus
112
113 - if:
114 properties:
115 compatible:
116 contains:
117 const: samsung,exynosautov9-cmu-dp
118
119 then:
120 properties:
121 clocks:
122 items:
123 - description: External reference
124 - description: DPU Main bus clock
125
126 clock-names:
127 items:
128 - const: oscclk
129 - const: bus
130
131 - if:
132 properties:
133 compatible:
134 contains:
135 const: samsung,exynosautov9-cmu-fs
136
137 then:
138 properties:
139 clocks:
140 items:
141 - description: External reference
142 - description: CMU_FSYS0 bus clock
143 - description: CMU_FSYS0 pcie cloc
144
145 clock-names:
146 items:
147 - const: oscclk
148 - const: dout_clkcmu_fsys0_bus
149 - const: dout_clkcmu_fsys0_pcie
150
151 - if:
152 properties:
153 compatible:
154 contains:
155 const: samsung,exynosautov9-cmu-fs
156
157 then:
158 properties:
159 clocks:
160 items:
161 - description: External reference
162 - description: CMU_FSYS1 bus clock
163 - description: CMU_FSYS1 mmc card
164 - description: CMU_FSYS1 usb clock
165
166 clock-names:
167 items:
168 - const: oscclk
169 - const: dout_clkcmu_fsys1_bus
170 - const: gout_clkcmu_fsys1_mmc_car
171 - const: dout_clkcmu_fsys1_usbdrd
172
173 - if:
174 properties:
175 compatible:
176 contains:
177 const: samsung,exynosautov9-cmu-fs
178
179 then:
180 properties:
181 clocks:
182 items:
183 - description: External reference
184 - description: CMU_FSYS2 bus clock
185 - description: UFS clock (from CMU
186 - description: Ethernet clock (fro
187
188 clock-names:
189 items:
190 - const: oscclk
191 - const: dout_clkcmu_fsys2_bus
192 - const: dout_fsys2_clkcmu_ufs_emb
193 - const: dout_fsys2_clkcmu_etherne
194
195 - if:
196 properties:
197 compatible:
198 contains:
199 const: samsung,exynosautov9-cmu-pe
200
201 then:
202 properties:
203 clocks:
204 items:
205 - description: External reference
206 - description: CMU_PERIC0 bus cloc
207 - description: PERIC0 IP clock (fr
208
209 clock-names:
210 items:
211 - const: oscclk
212 - const: dout_clkcmu_peric0_bus
213 - const: dout_clkcmu_peric0_ip
214
215 - if:
216 properties:
217 compatible:
218 contains:
219 const: samsung,exynosautov9-cmu-pe
220
221 then:
222 properties:
223 clocks:
224 items:
225 - description: External reference
226 - description: CMU_PERIC1 bus cloc
227 - description: PERIC1 IP clock (fr
228
229 clock-names:
230 items:
231 - const: oscclk
232 - const: dout_clkcmu_peric1_bus
233 - const: dout_clkcmu_peric1_ip
234
235 - if:
236 properties:
237 compatible:
238 contains:
239 const: samsung,exynosautov9-cmu-pe
240
241 then:
242 properties:
243 clocks:
244 items:
245 - description: External reference
246 - description: CMU_PERIS bus clock
247
248 clock-names:
249 items:
250 - const: oscclk
251 - const: dout_clkcmu_peris_bus
252
253 required:
254 - compatible
255 - "#clock-cells"
256 - clocks
257 - clock-names
258 - reg
259
260 additionalProperties: false
261
262 examples:
263 # Clock controller node for CMU_FSYS2
264 - |
265 #include <dt-bindings/clock/samsung,exynos
266
267 cmu_fsys2: clock-controller@17c00000 {
268 compatible = "samsung,exynosautov9-cmu
269 reg = <0x17c00000 0x8000>;
270 #clock-cells = <1>;
271
272 clocks = <&xtcxo>,
273 <&cmu_top DOUT_CLKCMU_FSYS2_B
274 <&cmu_top DOUT_CLKCMU_FSYS2_U
275 <&cmu_top DOUT_CLKCMU_FSYS2_E
276 clock-names = "oscclk",
277 "dout_clkcmu_fsys2_bus",
278 "dout_fsys2_clkcmu_ufs_e
279 "dout_fsys2_clkcmu_ether
280 };
281
282 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.