# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/clock/samsung,exynosautov9-clock.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Samsung Exynos Auto v9 SoC clock controller maintainers: - Chanho Park - Chanwoo Choi - Krzysztof Kozlowski - Sylwester Nawrocki - Tomasz Figa description: | Exynos Auto v9 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/XTCXO (26 MHz) and RTCCLK/XrtcXTI (32768 Hz). The external OSCCLK must be defined as fixed-rate clock in dts. CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and dividers; all other clocks of function blocks (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 'include/dt-bindings/clock/samsung,exynosautov9.h' header. properties: compatible: enum: - samsung,exynosautov9-cmu-top - samsung,exynosautov9-cmu-busmc - samsung,exynosautov9-cmu-core - samsung,exynosautov9-cmu-fsys0 - samsung,exynosautov9-cmu-fsys1 - samsung,exynosautov9-cmu-fsys2 - samsung,exynosautov9-cmu-peric0 - samsung,exynosautov9-cmu-peric1 - samsung,exynosautov9-cmu-peris 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,exynosautov9-cmu-top then: properties: clocks: items: - description: External reference clock (26 MHz) clock-names: items: - const: oscclk - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-busmc then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_BUSMC bus clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_busmc_bus - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-core then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_CORE bus clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_core_bus - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-fsys0 then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_FSYS0 bus clock (from CMU_TOP) - description: CMU_FSYS0 pcie clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_fsys0_bus - const: dout_clkcmu_fsys0_pcie - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-fsys1 then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_FSYS1 bus clock (from CMU_TOP) - description: CMU_FSYS1 mmc card clock (from CMU_TOP) - description: CMU_FSYS1 usb clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_fsys1_bus - const: gout_clkcmu_fsys1_mmc_card - const: dout_clkcmu_fsys1_usbdrd - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-fsys2 then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_FSYS2 bus clock (from CMU_TOP) - description: UFS clock (from CMU_TOP) - description: Ethernet clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_fsys2_bus - const: dout_fsys2_clkcmu_ufs_embd - const: dout_fsys2_clkcmu_ethernet - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-peric0 then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_PERIC0 bus clock (from CMU_TOP) - description: PERIC0 IP clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_peric0_bus - const: dout_clkcmu_peric0_ip - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-peric1 then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_PERIC1 bus clock (from CMU_TOP) - description: PERIC1 IP clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_peric1_bus - const: dout_clkcmu_peric1_ip - if: properties: compatible: contains: const: samsung,exynosautov9-cmu-peris then: properties: clocks: items: - description: External reference clock (26 MHz) - description: CMU_PERIS bus clock (from CMU_TOP) clock-names: items: - const: oscclk - const: dout_clkcmu_peris_bus required: - compatible - "#clock-cells" - clocks - clock-names - reg additionalProperties: false examples: # Clock controller node for CMU_FSYS2 - | #include cmu_fsys2: clock-controller@17c00000 { compatible = "samsung,exynosautov9-cmu-fsys2"; reg = <0x17c00000 0x8000>; #clock-cells = <1>; clocks = <&xtcxo>, <&cmu_top DOUT_CLKCMU_FSYS2_BUS>, <&cmu_top DOUT_CLKCMU_FSYS2_UFS_EMBD>, <&cmu_top DOUT_CLKCMU_FSYS2_ETHERNET>; clock-names = "oscclk", "dout_clkcmu_fsys2_bus", "dout_fsys2_clkcmu_ufs_embd", "dout_fsys2_clkcmu_ethernet"; }; ...