| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/clock/samsung,exynos850-clock.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Samsung Exynos850 SoC clock controller |
| |
| maintainers: |
| - Sam Protsenko <semen.protsenko@linaro.org> |
| - Chanwoo Choi <cw00.choi@samsung.com> |
| - Krzysztof Kozlowski <krzk@kernel.org> |
| - Sylwester Nawrocki <s.nawrocki@samsung.com> |
| - Tomasz Figa <tomasz.figa@gmail.com> |
| |
| description: | |
| Exynos850 clock controller is comprised of several CMU units, generating |
| clocks for different domains. Those CMU units are modeled as separate device |
| tree nodes, and might depend on each other. Root clocks in that clock tree are |
| two external clocks:: OSCCLK (26 MHz) and RTCCLK (32768 Hz). Those external |
| clocks must be defined as fixed-rate clocks in dts. |
| |
| CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and |
| dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP. |
| |
| Each clock is assigned an identifier and client nodes can use this identifier |
| to specify the clock which they consume. All clocks available for usage |
| in clock consumer nodes are defined as preprocessor macros in |
| 'dt-bindings/clock/exynos850.h' header. |
| |
| properties: |
| compatible: |
| enum: |
| - samsung,exynos850-cmu-top |
| - samsung,exynos850-cmu-apm |
| - samsung,exynos850-cmu-aud |
| - samsung,exynos850-cmu-cmgp |
| - samsung,exynos850-cmu-core |
| - samsung,exynos850-cmu-dpu |
| - samsung,exynos850-cmu-hsi |
| - samsung,exynos850-cmu-is |
| - samsung,exynos850-cmu-mfcmscl |
| - samsung,exynos850-cmu-peri |
| |
| clocks: |
| minItems: 1 |
| maxItems: 5 |
| |
| clock-names: |
| minItems: 1 |
| maxItems: 5 |
| |
| "#clock-cells": |
| const: 1 |
| |
| reg: |
| maxItems: 1 |
| |
| allOf: |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-top |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-apm |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: CMU_APM bus clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_clkcmu_apm_bus |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-aud |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: AUD clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_aud |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-cmgp |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: CMU_CMGP bus clock (from CMU_APM) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: gout_clkcmu_cmgp_bus |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-core |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: CMU_CORE bus clock (from CMU_TOP) |
| - description: CCI clock (from CMU_TOP) |
| - description: eMMC clock (from CMU_TOP) |
| - description: SSS clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_core_bus |
| - const: dout_core_cci |
| - const: dout_core_mmc_embd |
| - const: dout_core_sss |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-dpu |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: DPU clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_dpu |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-hsi |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: External RTC clock (32768 Hz) |
| - description: CMU_HSI bus clock (from CMU_TOP) |
| - description: SD card clock (from CMU_TOP) |
| - description: "USB 2.0 DRD clock (from CMU_TOP)" |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: rtcclk |
| - const: dout_hsi_bus |
| - const: dout_hsi_mmc_card |
| - const: dout_hsi_usb20drd |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-is |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: CMU_IS bus clock (from CMU_TOP) |
| - description: Image Texture Processing core clock (from CMU_TOP) |
| - description: Visual Recognition Accelerator clock (from CMU_TOP) |
| - description: Geometric Distortion Correction clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_is_bus |
| - const: dout_is_itp |
| - const: dout_is_vra |
| - const: dout_is_gdc |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-mfcmscl |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: Multi-Format Codec clock (from CMU_TOP) |
| - description: Memory to Memory Scaler clock (from CMU_TOP) |
| - description: Multi-Channel Scaler clock (from CMU_TOP) |
| - description: JPEG codec clock (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_mfcmscl_mfc |
| - const: dout_mfcmscl_m2m |
| - const: dout_mfcmscl_mcsc |
| - const: dout_mfcmscl_jpeg |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: samsung,exynos850-cmu-peri |
| |
| then: |
| properties: |
| clocks: |
| items: |
| - description: External reference clock (26 MHz) |
| - description: CMU_PERI bus clock (from CMU_TOP) |
| - description: UART clock (from CMU_TOP) |
| - description: Parent clock for HSI2C and SPI (from CMU_TOP) |
| |
| clock-names: |
| items: |
| - const: oscclk |
| - const: dout_peri_bus |
| - const: dout_peri_uart |
| - const: dout_peri_ip |
| |
| required: |
| - compatible |
| - "#clock-cells" |
| - clocks |
| - clock-names |
| - reg |
| |
| additionalProperties: false |
| |
| examples: |
| # Clock controller node for CMU_PERI |
| - | |
| #include <dt-bindings/clock/exynos850.h> |
| |
| cmu_peri: clock-controller@10030000 { |
| compatible = "samsung,exynos850-cmu-peri"; |
| reg = <0x10030000 0x8000>; |
| #clock-cells = <1>; |
| |
| clocks = <&oscclk>, <&cmu_top CLK_DOUT_PERI_BUS>, |
| <&cmu_top CLK_DOUT_PERI_UART>, |
| <&cmu_top CLK_DOUT_PERI_IP>; |
| clock-names = "oscclk", "dout_peri_bus", |
| "dout_peri_uart", "dout_peri_ip"; |
| }; |
| |
| ... |