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+# 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 <chanho61.park@samsung.com>
+ - Chanwoo Choi <cw00.choi@samsung.com>
+ - Krzysztof Kozlowski <krzk@kernel.org>
+ - Sylwester Nawrocki <s.nawrocki@samsung.com>
+ - Tomasz Figa <tomasz.figa@gmail.com>
+
+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 <dt-bindings/clock/samsung,exynosautov9.h>
+
+ 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";
+ };
+
+...