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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/samsung,exynos2200-cmu.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung Exynos2200 SoC clock controller
8
9maintainers:
10 - Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
11 - Chanwoo Choi <cw00.choi@samsung.com>
12 - Krzysztof Kozlowski <krzk@kernel.org>
13
14description: |
15 Exynos2200 clock controller is comprised of several CMU units, generating
16 clocks for different domains. Those CMU units are modeled as separate device
17 tree nodes, and might depend on each other. The root clocks in that root tree
18 are two external clocks: XTCXO (76.8 MHz) and RTCCLK (32768 Hz). XTCXO must be
19 defined as a fixed-rate clock in dts, whereas RTCCLK originates from PMIC.
20
21 CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
22 dividers; all other clocks of function blocks (other CMUs) are usually
23 derived from CMU_TOP.
24
25 Each clock is assigned an identifier and client nodes can use this identifier
26 to specify the clock which they consume. All clocks available for usage
27 in clock consumer nodes are defined as preprocessor macros in
28 'include/dt-bindings/clock/samsung,exynos2200-cmu.h' header.
29
30properties:
31 compatible:
32 enum:
33 - samsung,exynos2200-cmu-alive
34 - samsung,exynos2200-cmu-cmgp
35 - samsung,exynos2200-cmu-hsi0
36 - samsung,exynos2200-cmu-peric0
37 - samsung,exynos2200-cmu-peric1
38 - samsung,exynos2200-cmu-peric2
39 - samsung,exynos2200-cmu-peris
40 - samsung,exynos2200-cmu-top
41 - samsung,exynos2200-cmu-ufs
42 - samsung,exynos2200-cmu-vts
43
44 clocks:
45 minItems: 1
46 maxItems: 6
47
48 clock-names:
49 minItems: 1
50 maxItems: 6
51
52 "#clock-cells":
53 const: 1
54
55 reg:
56 maxItems: 1
57
58required:
59 - compatible
60 - clocks
61 - clock-names
62 - reg
63 - "#clock-cells"
64
65allOf:
66 - if:
67 properties:
68 compatible:
69 contains:
70 const: samsung,exynos2200-cmu-alive
71
72 then:
73 properties:
74 clocks:
75 items:
76 - description: External reference clock (76.8 MHz)
77 - description: CMU_ALIVE NOC clock (from CMU_TOP)
78
79 clock-names:
80 items:
81 - const: oscclk
82 - const: noc
83
84 - if:
85 properties:
86 compatible:
87 contains:
88 const: samsung,exynos2200-cmu-cmgp
89
90 then:
91 properties:
92 clocks:
93 items:
94 - description: External reference clock (76.8 MHz)
95 - description: CMU_CMGP NOC clock (from CMU_TOP)
96 - description: CMU_CMGP PERI clock (from CMU_TOP)
97
98 clock-names:
99 items:
100 - const: oscclk
101 - const: noc
102 - const: peri
103
104 - if:
105 properties:
106 compatible:
107 contains:
108 const: samsung,exynos2200-cmu-hsi0
109
110 then:
111 properties:
112 clocks:
113 items:
114 - description: External reference clock (76.8 MHz)
115 - description: External RTC clock (32768 Hz)
116 - description: CMU_HSI0 NOC clock (from CMU_TOP)
117 - description: CMU_HSI0 DPGTC clock (from CMU_TOP)
118 - description: CMU_HSI0 DPOSC clock (from CMU_TOP)
119 - description: CMU_HSI0 USB32DRD clock (from CMU_TOP)
120
121 clock-names:
122 items:
123 - const: oscclk
124 - const: rtcclk
125 - const: noc
126 - const: dpgtc
127 - const: dposc
128 - const: usb
129
130 - if:
131 properties:
132 compatible:
133 contains:
134 enum:
135 - samsung,exynos2200-cmu-peric0
136 - samsung,exynos2200-cmu-peric1
137 - samsung,exynos2200-cmu-peric2
138
139 then:
140 properties:
141 clocks:
142 items:
143 - description: External reference clock (76.8 MHz)
144 - description: CMU_PERICn NOC clock (from CMU_TOP)
145 - description: CMU_PERICn IP0 clock (from CMU_TOP)
146 - description: CMU_PERICn IP1 clock (from CMU_TOP)
147
148 clock-names:
149 items:
150 - const: oscclk
151 - const: noc
152 - const: ip0
153 - const: ip1
154
155 - if:
156 properties:
157 compatible:
158 contains:
159 const: samsung,exynos2200-cmu-peris
160
161 then:
162 properties:
163 clocks:
164 items:
165 - description: External reference clock (25.6 MHz)
166 - description: CMU_PERIS NOC clock (from CMU_TOP)
167 - description: CMU_PERIS GIC clock (from CMU_TOP)
168
169 clock-names:
170 items:
171 - const: tcxo_div3
172 - const: noc
173 - const: gic
174
175 - if:
176 properties:
177 compatible:
178 contains:
179 const: samsung,exynos2200-cmu-top
180
181 then:
182 properties:
183 clocks:
184 items:
185 - description: External reference clock (76.8 MHz)
186
187 clock-names:
188 items:
189 - const: oscclk
190
191 - if:
192 properties:
193 compatible:
194 contains:
195 const: samsung,exynos2200-cmu-ufs
196
197 then:
198 properties:
199 clocks:
200 items:
201 - description: External reference clock (76.8 MHz)
202 - description: CMU_UFS NOC clock (from CMU_TOP)
203 - description: CMU_UFS MMC clock (from CMU_TOP)
204 - description: CMU_UFS UFS clock (from CMU_TOP)
205
206 clock-names:
207 items:
208 - const: oscclk
209 - const: noc
210 - const: mmc
211 - const: ufs
212
213 - if:
214 properties:
215 compatible:
216 contains:
217 const: samsung,exynos2200-cmu-vts
218
219 then:
220 properties:
221 clocks:
222 items:
223 - description: External reference clock (76.8 MHz)
224 - description: CMU_VTS DMIC clock (from CMU_TOP)
225
226 clock-names:
227 items:
228 - const: oscclk
229 - const: dmic
230
231additionalProperties: false
232
233examples:
234 - |
235 #include <dt-bindings/clock/samsung,exynos2200-cmu.h>
236
237 cmu_vts: clock-controller@15300000 {
238 compatible = "samsung,exynos2200-cmu-vts";
239 reg = <0x15300000 0x8000>;
240 #clock-cells = <1>;
241
242 clocks = <&oscclk>,
243 <&cmu_top CLK_DOUT_CMU_VTS_DMIC>;
244 clock-names = "oscclk", "dmic";
245 };
246
247...