1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/clock/samsung,exynos850-clock.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Samsung Exynos850 SoC clock controller
10 - Sam Protsenko <semen.protsenko@linaro.org>
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>
17 Exynos850 clock controller is comprised of several CMU units, generating
18 clocks for different domains. Those CMU units are modeled as separate device
19 tree nodes, and might depend on each other. Root clocks in that clock tree are
20 two external clocks:: OSCCLK (26 MHz) and RTCCLK (32768 Hz). Those external
21 clocks must be defined as fixed-rate clocks in dts.
23 CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
24 dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP.
26 Each clock is assigned an identifier and client nodes can use this identifier
27 to specify the clock which they consume. All clocks available for usage
28 in clock consumer nodes are defined as preprocessor macros in
29 'dt-bindings/clock/exynos850.h' header.
34 - samsung,exynos850-cmu-top
35 - samsung,exynos850-cmu-apm
36 - samsung,exynos850-cmu-aud
37 - samsung,exynos850-cmu-cmgp
38 - samsung,exynos850-cmu-core
39 - samsung,exynos850-cmu-dpu
40 - samsung,exynos850-cmu-hsi
41 - samsung,exynos850-cmu-is
42 - samsung,exynos850-cmu-mfcmscl
43 - samsung,exynos850-cmu-peri
64 const: samsung,exynos850-cmu-top
70 - description: External reference clock (26 MHz)
80 const: samsung,exynos850-cmu-apm
86 - description: External reference clock (26 MHz)
87 - description: CMU_APM bus clock (from CMU_TOP)
92 - const: dout_clkcmu_apm_bus
98 const: samsung,exynos850-cmu-aud
104 - description: External reference clock (26 MHz)
105 - description: AUD clock (from CMU_TOP)
116 const: samsung,exynos850-cmu-cmgp
122 - description: External reference clock (26 MHz)
123 - description: CMU_CMGP bus clock (from CMU_APM)
128 - const: gout_clkcmu_cmgp_bus
134 const: samsung,exynos850-cmu-core
140 - description: External reference clock (26 MHz)
141 - description: CMU_CORE bus clock (from CMU_TOP)
142 - description: CCI clock (from CMU_TOP)
143 - description: eMMC clock (from CMU_TOP)
144 - description: SSS clock (from CMU_TOP)
149 - const: dout_core_bus
150 - const: dout_core_cci
151 - const: dout_core_mmc_embd
152 - const: dout_core_sss
158 const: samsung,exynos850-cmu-dpu
164 - description: External reference clock (26 MHz)
165 - description: DPU clock (from CMU_TOP)
176 const: samsung,exynos850-cmu-hsi
182 - description: External reference clock (26 MHz)
183 - description: External RTC clock (32768 Hz)
184 - description: CMU_HSI bus clock (from CMU_TOP)
185 - description: SD card clock (from CMU_TOP)
186 - description: "USB 2.0 DRD clock (from CMU_TOP)"
192 - const: dout_hsi_bus
193 - const: dout_hsi_mmc_card
194 - const: dout_hsi_usb20drd
200 const: samsung,exynos850-cmu-is
206 - description: External reference clock (26 MHz)
207 - description: CMU_IS bus clock (from CMU_TOP)
208 - description: Image Texture Processing core clock (from CMU_TOP)
209 - description: Visual Recognition Accelerator clock (from CMU_TOP)
210 - description: Geometric Distortion Correction clock (from CMU_TOP)
224 const: samsung,exynos850-cmu-mfcmscl
230 - description: External reference clock (26 MHz)
231 - description: Multi-Format Codec clock (from CMU_TOP)
232 - description: Memory to Memory Scaler clock (from CMU_TOP)
233 - description: Multi-Channel Scaler clock (from CMU_TOP)
234 - description: JPEG codec clock (from CMU_TOP)
239 - const: dout_mfcmscl_mfc
240 - const: dout_mfcmscl_m2m
241 - const: dout_mfcmscl_mcsc
242 - const: dout_mfcmscl_jpeg
248 const: samsung,exynos850-cmu-peri
254 - description: External reference clock (26 MHz)
255 - description: CMU_PERI bus clock (from CMU_TOP)
256 - description: UART clock (from CMU_TOP)
257 - description: Parent clock for HSI2C and SPI (from CMU_TOP)
262 - const: dout_peri_bus
263 - const: dout_peri_uart
264 - const: dout_peri_ip
273 additionalProperties: false
276 # Clock controller node for CMU_PERI
278 #include <dt-bindings/clock/exynos850.h>
280 cmu_peri: clock-controller@10030000 {
281 compatible = "samsung,exynos850-cmu-peri";
282 reg = <0x10030000 0x8000>;
285 clocks = <&oscclk>, <&cmu_top CLK_DOUT_PERI_BUS>,
286 <&cmu_top CLK_DOUT_PERI_UART>,
287 <&cmu_top CLK_DOUT_PERI_IP>;
288 clock-names = "oscclk", "dout_peri_bus",
289 "dout_peri_uart", "dout_peri_ip";