samsung,exynos7885-clock.yaml (4793B)
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/clock/samsung,exynos7885-clock.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Samsung Exynos7885 SoC clock controller 8 9maintainers: 10 - Dávid Virág <virag.david003@gmail.com> 11 - Chanwoo Choi <cw00.choi@samsung.com> 12 - Krzysztof Kozlowski <krzk@kernel.org> 13 - Sylwester Nawrocki <s.nawrocki@samsung.com> 14 - Tomasz Figa <tomasz.figa@gmail.com> 15 16description: | 17 Exynos7885 clock controller is comprised of several CMU units, generating 18 clocks for different domains. Those CMU units are modeled as separate device 19 tree nodes, and might depend on each other. The root clock in that root tree 20 is an external clock: OSCCLK (26 MHz). This external clock must be defined 21 as a fixed-rate clock in dts. 22 23 CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and 24 dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP. 25 26 Each clock is assigned an identifier and client nodes can use this identifier 27 to specify the clock which they consume. All clocks available for usage 28 in clock consumer nodes are defined as preprocessor macros in 29 'dt-bindings/clock/exynos7885.h' header. 30 31properties: 32 compatible: 33 enum: 34 - samsung,exynos7885-cmu-top 35 - samsung,exynos7885-cmu-core 36 - samsung,exynos7885-cmu-peri 37 38 clocks: 39 minItems: 1 40 maxItems: 10 41 42 clock-names: 43 minItems: 1 44 maxItems: 10 45 46 "#clock-cells": 47 const: 1 48 49 reg: 50 maxItems: 1 51 52allOf: 53 - if: 54 properties: 55 compatible: 56 contains: 57 const: samsung,exynos7885-cmu-top 58 59 then: 60 properties: 61 clocks: 62 items: 63 - description: External reference clock (26 MHz) 64 65 clock-names: 66 items: 67 - const: oscclk 68 69 - if: 70 properties: 71 compatible: 72 contains: 73 const: samsung,exynos7885-cmu-core 74 75 then: 76 properties: 77 clocks: 78 items: 79 - description: External reference clock (26 MHz) 80 - description: CMU_CORE bus clock (from CMU_TOP) 81 - description: CCI clock (from CMU_TOP) 82 - description: G3D clock (from CMU_TOP) 83 84 clock-names: 85 items: 86 - const: oscclk 87 - const: dout_core_bus 88 - const: dout_core_cci 89 - const: dout_core_g3d 90 91 - if: 92 properties: 93 compatible: 94 contains: 95 const: samsung,exynos7885-cmu-peri 96 97 then: 98 properties: 99 clocks: 100 items: 101 - description: External reference clock (26 MHz) 102 - description: CMU_PERI bus clock (from CMU_TOP) 103 - description: SPI0 clock (from CMU_TOP) 104 - description: SPI1 clock (from CMU_TOP) 105 - description: UART0 clock (from CMU_TOP) 106 - description: UART1 clock (from CMU_TOP) 107 - description: UART2 clock (from CMU_TOP) 108 - description: USI0 clock (from CMU_TOP) 109 - description: USI1 clock (from CMU_TOP) 110 - description: USI2 clock (from CMU_TOP) 111 112 clock-names: 113 items: 114 - const: oscclk 115 - const: dout_peri_bus 116 - const: dout_peri_spi0 117 - const: dout_peri_spi1 118 - const: dout_peri_uart0 119 - const: dout_peri_uart1 120 - const: dout_peri_uart2 121 - const: dout_peri_usi0 122 - const: dout_peri_usi1 123 - const: dout_peri_usi2 124 125required: 126 - compatible 127 - "#clock-cells" 128 - clocks 129 - clock-names 130 - reg 131 132additionalProperties: false 133 134examples: 135 # Clock controller node for CMU_PERI 136 - | 137 #include <dt-bindings/clock/exynos7885.h> 138 139 cmu_peri: clock-controller@10010000 { 140 compatible = "samsung,exynos7885-cmu-peri"; 141 reg = <0x10010000 0x8000>; 142 #clock-cells = <1>; 143 144 clocks = <&oscclk>, 145 <&cmu_top CLK_DOUT_PERI_BUS>, 146 <&cmu_top CLK_DOUT_PERI_SPI0>, 147 <&cmu_top CLK_DOUT_PERI_SPI1>, 148 <&cmu_top CLK_DOUT_PERI_UART0>, 149 <&cmu_top CLK_DOUT_PERI_UART1>, 150 <&cmu_top CLK_DOUT_PERI_UART2>, 151 <&cmu_top CLK_DOUT_PERI_USI0>, 152 <&cmu_top CLK_DOUT_PERI_USI1>, 153 <&cmu_top CLK_DOUT_PERI_USI2>; 154 clock-names = "oscclk", 155 "dout_peri_bus", 156 "dout_peri_spi0", 157 "dout_peri_spi1", 158 "dout_peri_uart0", 159 "dout_peri_uart1", 160 "dout_peri_uart2", 161 "dout_peri_usi0", 162 "dout_peri_usi1", 163 "dout_peri_usi2"; 164 }; 165 166...