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Diffstat (limited to 'Documentation/devicetree/bindings/clock/samsung,exynos2200-cmu.yaml')
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diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos2200-cmu.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos2200-cmu.yaml new file mode 100644 index 000000000000..89433e6d3518 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,exynos2200-cmu.yaml @@ -0,0 +1,247 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/samsung,exynos2200-cmu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung Exynos2200 SoC clock controller + +maintainers: + - Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com> + - Chanwoo Choi <cw00.choi@samsung.com> + - Krzysztof Kozlowski <krzk@kernel.org> + +description: | + Exynos2200 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. The root clocks in that root tree + are two external clocks: XTCXO (76.8 MHz) and RTCCLK (32768 Hz). XTCXO must be + defined as a fixed-rate clock in dts, whereas RTCCLK originates from PMIC. + + 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,exynos2200-cmu.h' header. + +properties: + compatible: + enum: + - samsung,exynos2200-cmu-alive + - samsung,exynos2200-cmu-cmgp + - samsung,exynos2200-cmu-hsi0 + - samsung,exynos2200-cmu-peric0 + - samsung,exynos2200-cmu-peric1 + - samsung,exynos2200-cmu-peric2 + - samsung,exynos2200-cmu-peris + - samsung,exynos2200-cmu-top + - samsung,exynos2200-cmu-ufs + - samsung,exynos2200-cmu-vts + + clocks: + minItems: 1 + maxItems: 6 + + clock-names: + minItems: 1 + maxItems: 6 + + "#clock-cells": + const: 1 + + reg: + maxItems: 1 + +required: + - compatible + - clocks + - clock-names + - reg + - "#clock-cells" + +allOf: + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-alive + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: CMU_ALIVE NOC clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: noc + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-cmgp + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: CMU_CMGP NOC clock (from CMU_TOP) + - description: CMU_CMGP PERI clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: noc + - const: peri + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-hsi0 + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: External RTC clock (32768 Hz) + - description: CMU_HSI0 NOC clock (from CMU_TOP) + - description: CMU_HSI0 DPGTC clock (from CMU_TOP) + - description: CMU_HSI0 DPOSC clock (from CMU_TOP) + - description: CMU_HSI0 USB32DRD clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: rtcclk + - const: noc + - const: dpgtc + - const: dposc + - const: usb + + - if: + properties: + compatible: + contains: + enum: + - samsung,exynos2200-cmu-peric0 + - samsung,exynos2200-cmu-peric1 + - samsung,exynos2200-cmu-peric2 + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: CMU_PERICn NOC clock (from CMU_TOP) + - description: CMU_PERICn IP0 clock (from CMU_TOP) + - description: CMU_PERICn IP1 clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: noc + - const: ip0 + - const: ip1 + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-peris + + then: + properties: + clocks: + items: + - description: External reference clock (25.6 MHz) + - description: CMU_PERIS NOC clock (from CMU_TOP) + - description: CMU_PERIS GIC clock (from CMU_TOP) + + clock-names: + items: + - const: tcxo_div3 + - const: noc + - const: gic + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-top + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + + clock-names: + items: + - const: oscclk + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-ufs + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: CMU_UFS NOC clock (from CMU_TOP) + - description: CMU_UFS MMC clock (from CMU_TOP) + - description: CMU_UFS UFS clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: noc + - const: mmc + - const: ufs + + - if: + properties: + compatible: + contains: + const: samsung,exynos2200-cmu-vts + + then: + properties: + clocks: + items: + - description: External reference clock (76.8 MHz) + - description: CMU_VTS DMIC clock (from CMU_TOP) + + clock-names: + items: + - const: oscclk + - const: dmic + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/samsung,exynos2200-cmu.h> + + cmu_vts: clock-controller@15300000 { + compatible = "samsung,exynos2200-cmu-vts"; + reg = <0x15300000 0x8000>; + #clock-cells = <1>; + + clocks = <&oscclk>, + <&cmu_top CLK_DOUT_CMU_VTS_DMIC>; + clock-names = "oscclk", "dmic"; + }; + +... |