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Diffstat (limited to 'Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml')
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diff --git a/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml new file mode 100644 index 000000000..55c4f94a1 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml @@ -0,0 +1,263 @@ +# 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"; + }; + +... |