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| 1 | +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | +%YAML 1.2 |
| 3 | +--- |
| 4 | +$id: http://devicetree.org/schemas/clock/samsung,exynos8895-clock.yaml# |
| 5 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | + |
| 7 | +title: Samsung Exynos8895 SoC clock controller |
| 8 | + |
| 9 | +maintainers: |
| 10 | + - Ivaylo Ivanov <[email protected]> |
| 11 | + - Chanwoo Choi <[email protected]> |
| 12 | + - Krzysztof Kozlowski <[email protected]> |
| 13 | + |
| 14 | +description: | |
| 15 | + Exynos8895 clock controller is comprised of several CMU units, generating |
| 16 | + clocks for different domains. Those CMU units are modeled as separate device |
| 17 | + tree nodes, and might depend on each other. The root clock in that root tree |
| 18 | + is an external clock: OSCCLK (26 MHz). This external clock must be defined |
| 19 | + as a fixed-rate clock in dts. |
| 20 | +
|
| 21 | + CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and |
| 22 | + dividers; all other clocks of function blocks (other CMUs) are usually |
| 23 | + derived from CMU_TOP. |
| 24 | +
|
| 25 | + Each clock is assigned an identifier and client nodes can use this identifier |
| 26 | + to specify the clock which they consume. All clocks available for usage |
| 27 | + in clock consumer nodes are defined as preprocessor macros in |
| 28 | + 'include/dt-bindings/clock/samsung,exynos8895.h' header. |
| 29 | +
|
| 30 | +properties: |
| 31 | + compatible: |
| 32 | + enum: |
| 33 | + - samsung,exynos8895-cmu-fsys0 |
| 34 | + - samsung,exynos8895-cmu-fsys1 |
| 35 | + - samsung,exynos8895-cmu-peric0 |
| 36 | + - samsung,exynos8895-cmu-peric1 |
| 37 | + - samsung,exynos8895-cmu-peris |
| 38 | + - samsung,exynos8895-cmu-top |
| 39 | + |
| 40 | + clocks: |
| 41 | + minItems: 1 |
| 42 | + maxItems: 16 |
| 43 | + |
| 44 | + clock-names: |
| 45 | + minItems: 1 |
| 46 | + maxItems: 16 |
| 47 | + |
| 48 | + "#clock-cells": |
| 49 | + const: 1 |
| 50 | + |
| 51 | + reg: |
| 52 | + maxItems: 1 |
| 53 | + |
| 54 | +required: |
| 55 | + - compatible |
| 56 | + - clocks |
| 57 | + - clock-names |
| 58 | + - reg |
| 59 | + - "#clock-cells" |
| 60 | + |
| 61 | +allOf: |
| 62 | + - if: |
| 63 | + properties: |
| 64 | + compatible: |
| 65 | + contains: |
| 66 | + const: samsung,exynos8895-cmu-fsys0 |
| 67 | + |
| 68 | + then: |
| 69 | + properties: |
| 70 | + clocks: |
| 71 | + items: |
| 72 | + - description: External reference clock (26 MHz) |
| 73 | + - description: CMU_FSYS0 BUS clock (from CMU_TOP) |
| 74 | + - description: CMU_FSYS0 DPGTC clock (from CMU_TOP) |
| 75 | + - description: CMU_FSYS0 MMC_EMBD clock (from CMU_TOP) |
| 76 | + - description: CMU_FSYS0 UFS_EMBD clock (from CMU_TOP) |
| 77 | + - description: CMU_FSYS0 USBDRD30 clock (from CMU_TOP) |
| 78 | + |
| 79 | + clock-names: |
| 80 | + items: |
| 81 | + - const: oscclk |
| 82 | + - const: bus |
| 83 | + - const: dpgtc |
| 84 | + - const: mmc |
| 85 | + - const: ufs |
| 86 | + - const: usbdrd30 |
| 87 | + |
| 88 | + - if: |
| 89 | + properties: |
| 90 | + compatible: |
| 91 | + contains: |
| 92 | + const: samsung,exynos8895-cmu-fsys1 |
| 93 | + |
| 94 | + then: |
| 95 | + properties: |
| 96 | + clocks: |
| 97 | + items: |
| 98 | + - description: External reference clock (26 MHz) |
| 99 | + - description: CMU_FSYS1 BUS clock (from CMU_TOP) |
| 100 | + - description: CMU_FSYS1 PCIE clock (from CMU_TOP) |
| 101 | + - description: CMU_FSYS1 UFS_CARD clock (from CMU_TOP) |
| 102 | + - description: CMU_FSYS1 MMC_CARD clock (from CMU_TOP) |
| 103 | + |
| 104 | + clock-names: |
| 105 | + items: |
| 106 | + - const: oscclk |
| 107 | + - const: bus |
| 108 | + - const: pcie |
| 109 | + - const: ufs |
| 110 | + - const: mmc |
| 111 | + |
| 112 | + - if: |
| 113 | + properties: |
| 114 | + compatible: |
| 115 | + contains: |
| 116 | + const: samsung,exynos8895-cmu-peric0 |
| 117 | + |
| 118 | + then: |
| 119 | + properties: |
| 120 | + clocks: |
| 121 | + items: |
| 122 | + - description: External reference clock (26 MHz) |
| 123 | + - description: CMU_PERIC0 BUS clock (from CMU_TOP) |
| 124 | + - description: CMU_PERIC0 UART_DBG clock (from CMU_TOP) |
| 125 | + - description: CMU_PERIC0 USI00 clock (from CMU_TOP) |
| 126 | + - description: CMU_PERIC0 USI01 clock (from CMU_TOP) |
| 127 | + - description: CMU_PERIC0 USI02 clock (from CMU_TOP) |
| 128 | + - description: CMU_PERIC0 USI03 clock (from CMU_TOP) |
| 129 | + |
| 130 | + clock-names: |
| 131 | + items: |
| 132 | + - const: oscclk |
| 133 | + - const: bus |
| 134 | + - const: uart |
| 135 | + - const: usi0 |
| 136 | + - const: usi1 |
| 137 | + - const: usi2 |
| 138 | + - const: usi3 |
| 139 | + |
| 140 | + - if: |
| 141 | + properties: |
| 142 | + compatible: |
| 143 | + contains: |
| 144 | + const: samsung,exynos8895-cmu-peric1 |
| 145 | + |
| 146 | + then: |
| 147 | + properties: |
| 148 | + clocks: |
| 149 | + items: |
| 150 | + - description: External reference clock (26 MHz) |
| 151 | + - description: CMU_PERIC1 BUS clock (from CMU_TOP) |
| 152 | + - description: CMU_PERIC1 SPEEDY2 clock (from CMU_TOP) |
| 153 | + - description: CMU_PERIC1 SPI_CAM0 clock (from CMU_TOP) |
| 154 | + - description: CMU_PERIC1 SPI_CAM1 clock (from CMU_TOP) |
| 155 | + - description: CMU_PERIC1 UART_BT clock (from CMU_TOP) |
| 156 | + - description: CMU_PERIC1 USI04 clock (from CMU_TOP) |
| 157 | + - description: CMU_PERIC1 USI05 clock (from CMU_TOP) |
| 158 | + - description: CMU_PERIC1 USI06 clock (from CMU_TOP) |
| 159 | + - description: CMU_PERIC1 USI07 clock (from CMU_TOP) |
| 160 | + - description: CMU_PERIC1 USI08 clock (from CMU_TOP) |
| 161 | + - description: CMU_PERIC1 USI09 clock (from CMU_TOP) |
| 162 | + - description: CMU_PERIC1 USI10 clock (from CMU_TOP) |
| 163 | + - description: CMU_PERIC1 USI11 clock (from CMU_TOP) |
| 164 | + - description: CMU_PERIC1 USI12 clock (from CMU_TOP) |
| 165 | + - description: CMU_PERIC1 USI13 clock (from CMU_TOP) |
| 166 | + |
| 167 | + clock-names: |
| 168 | + items: |
| 169 | + - const: oscclk |
| 170 | + - const: bus |
| 171 | + - const: speedy |
| 172 | + - const: cam0 |
| 173 | + - const: cam1 |
| 174 | + - const: uart |
| 175 | + - const: usi4 |
| 176 | + - const: usi5 |
| 177 | + - const: usi6 |
| 178 | + - const: usi7 |
| 179 | + - const: usi8 |
| 180 | + - const: usi9 |
| 181 | + - const: usi10 |
| 182 | + - const: usi11 |
| 183 | + - const: usi12 |
| 184 | + - const: usi13 |
| 185 | + |
| 186 | + - if: |
| 187 | + properties: |
| 188 | + compatible: |
| 189 | + contains: |
| 190 | + const: samsung,exynos8895-cmu-peris |
| 191 | + |
| 192 | + then: |
| 193 | + properties: |
| 194 | + clocks: |
| 195 | + items: |
| 196 | + - description: External reference clock (26 MHz) |
| 197 | + - description: CMU_PERIS BUS clock (from CMU_TOP) |
| 198 | + |
| 199 | + clock-names: |
| 200 | + items: |
| 201 | + - const: oscclk |
| 202 | + - const: bus |
| 203 | + |
| 204 | + - if: |
| 205 | + properties: |
| 206 | + compatible: |
| 207 | + contains: |
| 208 | + const: samsung,exynos8895-cmu-top |
| 209 | + |
| 210 | + then: |
| 211 | + properties: |
| 212 | + clocks: |
| 213 | + items: |
| 214 | + - description: External reference clock (26 MHz) |
| 215 | + |
| 216 | + clock-names: |
| 217 | + items: |
| 218 | + - const: oscclk |
| 219 | + |
| 220 | +additionalProperties: false |
| 221 | + |
| 222 | +examples: |
| 223 | + - | |
| 224 | + #include <dt-bindings/clock/samsung,exynos8895.h> |
| 225 | +
|
| 226 | + cmu_fsys1: clock-controller@11400000 { |
| 227 | + compatible = "samsung,exynos8895-cmu-fsys1"; |
| 228 | + reg = <0x11400000 0x8000>; |
| 229 | + #clock-cells = <1>; |
| 230 | +
|
| 231 | + clocks = <&oscclk>, |
| 232 | + <&cmu_top CLK_DOUT_CMU_FSYS1_BUS>, |
| 233 | + <&cmu_top CLK_DOUT_CMU_FSYS1_PCIE>, |
| 234 | + <&cmu_top CLK_DOUT_CMU_FSYS1_UFS_CARD>, |
| 235 | + <&cmu_top CLK_DOUT_CMU_FSYS1_MMC_CARD>; |
| 236 | + clock-names = "oscclk", "bus", "pcie", "ufs", "mmc"; |
| 237 | + }; |
| 238 | +
|
| 239 | +... |
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