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| 1 | +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | +%YAML 1.2 |
| 3 | +--- |
| 4 | +$id: http://devicetree.org/schemas/interconnect/mediatek,cci.yaml# |
| 5 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | + |
| 7 | +title: MediaTek Cache Coherent Interconnect (CCI) frequency and voltage scaling |
| 8 | + |
| 9 | +maintainers: |
| 10 | + - Jia-Wei Chang <[email protected]> |
| 11 | + - Johnson Wang <[email protected]> |
| 12 | + |
| 13 | +description: | |
| 14 | + MediaTek Cache Coherent Interconnect (CCI) is a hardware engine used by |
| 15 | + MT8183 and MT8186 SoCs to scale the frequency and adjust the voltage in |
| 16 | + hardware. It can also optimize the voltage to reduce the power consumption. |
| 17 | +
|
| 18 | +properties: |
| 19 | + compatible: |
| 20 | + enum: |
| 21 | + - mediatek,mt8183-cci |
| 22 | + - mediatek,mt8186-cci |
| 23 | + |
| 24 | + clocks: |
| 25 | + items: |
| 26 | + - description: |
| 27 | + The multiplexer for clock input of the bus. |
| 28 | + - description: |
| 29 | + A parent of "bus" clock which is used as an intermediate clock source |
| 30 | + when the original clock source (PLL) is under transition and not |
| 31 | + stable yet. |
| 32 | + |
| 33 | + clock-names: |
| 34 | + items: |
| 35 | + - const: cci |
| 36 | + - const: intermediate |
| 37 | + |
| 38 | + operating-points-v2: true |
| 39 | + opp-table: true |
| 40 | + |
| 41 | + proc-supply: |
| 42 | + description: |
| 43 | + Phandle of the regulator for CCI that provides the supply voltage. |
| 44 | + |
| 45 | + sram-supply: |
| 46 | + description: |
| 47 | + Phandle of the regulator for sram of CCI that provides the supply |
| 48 | + voltage. When it is present, the implementation needs to do |
| 49 | + "voltage tracking" to step by step scale up/down Vproc and Vsram to fit |
| 50 | + SoC specific needs. When absent, the voltage scaling flow is handled by |
| 51 | + hardware, hence no software "voltage tracking" is needed. |
| 52 | + |
| 53 | +required: |
| 54 | + - compatible |
| 55 | + - clocks |
| 56 | + - clock-names |
| 57 | + - operating-points-v2 |
| 58 | + - proc-supply |
| 59 | + |
| 60 | +additionalProperties: false |
| 61 | + |
| 62 | +examples: |
| 63 | + - | |
| 64 | + #include <dt-bindings/clock/mt8183-clk.h> |
| 65 | + cci: cci { |
| 66 | + compatible = "mediatek,mt8183-cci"; |
| 67 | + clocks = <&mcucfg CLK_MCU_BUS_SEL>, |
| 68 | + <&topckgen CLK_TOP_ARMPLL_DIV_PLL1>; |
| 69 | + clock-names = "cci", "intermediate"; |
| 70 | + operating-points-v2 = <&cci_opp>; |
| 71 | + proc-supply = <&mt6358_vproc12_reg>; |
| 72 | + }; |
| 73 | +
|
| 74 | + cci_opp: opp-table-cci { |
| 75 | + compatible = "operating-points-v2"; |
| 76 | + opp-shared; |
| 77 | + opp2_00: opp-273000000 { |
| 78 | + opp-hz = /bits/ 64 <273000000>; |
| 79 | + opp-microvolt = <650000>; |
| 80 | + }; |
| 81 | + opp2_01: opp-338000000 { |
| 82 | + opp-hz = /bits/ 64 <338000000>; |
| 83 | + opp-microvolt = <687500>; |
| 84 | + }; |
| 85 | + opp2_02: opp-403000000 { |
| 86 | + opp-hz = /bits/ 64 <403000000>; |
| 87 | + opp-microvolt = <718750>; |
| 88 | + }; |
| 89 | + opp2_03: opp-463000000 { |
| 90 | + opp-hz = /bits/ 64 <463000000>; |
| 91 | + opp-microvolt = <756250>; |
| 92 | + }; |
| 93 | + opp2_04: opp-546000000 { |
| 94 | + opp-hz = /bits/ 64 <546000000>; |
| 95 | + opp-microvolt = <800000>; |
| 96 | + }; |
| 97 | + opp2_05: opp-624000000 { |
| 98 | + opp-hz = /bits/ 64 <624000000>; |
| 99 | + opp-microvolt = <818750>; |
| 100 | + }; |
| 101 | + opp2_06: opp-689000000 { |
| 102 | + opp-hz = /bits/ 64 <689000000>; |
| 103 | + opp-microvolt = <850000>; |
| 104 | + }; |
| 105 | + opp2_07: opp-767000000 { |
| 106 | + opp-hz = /bits/ 64 <767000000>; |
| 107 | + opp-microvolt = <868750>; |
| 108 | + }; |
| 109 | + opp2_08: opp-845000000 { |
| 110 | + opp-hz = /bits/ 64 <845000000>; |
| 111 | + opp-microvolt = <893750>; |
| 112 | + }; |
| 113 | + opp2_09: opp-871000000 { |
| 114 | + opp-hz = /bits/ 64 <871000000>; |
| 115 | + opp-microvolt = <906250>; |
| 116 | + }; |
| 117 | + opp2_10: opp-923000000 { |
| 118 | + opp-hz = /bits/ 64 <923000000>; |
| 119 | + opp-microvolt = <931250>; |
| 120 | + }; |
| 121 | + opp2_11: opp-962000000 { |
| 122 | + opp-hz = /bits/ 64 <962000000>; |
| 123 | + opp-microvolt = <943750>; |
| 124 | + }; |
| 125 | + opp2_12: opp-1027000000 { |
| 126 | + opp-hz = /bits/ 64 <1027000000>; |
| 127 | + opp-microvolt = <975000>; |
| 128 | + }; |
| 129 | + opp2_13: opp-1092000000 { |
| 130 | + opp-hz = /bits/ 64 <1092000000>; |
| 131 | + opp-microvolt = <1000000>; |
| 132 | + }; |
| 133 | + opp2_14: opp-1144000000 { |
| 134 | + opp-hz = /bits/ 64 <1144000000>; |
| 135 | + opp-microvolt = <1025000>; |
| 136 | + }; |
| 137 | + opp2_15: opp-1196000000 { |
| 138 | + opp-hz = /bits/ 64 <1196000000>; |
| 139 | + opp-microvolt = <1050000>; |
| 140 | + }; |
| 141 | + }; |
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