| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/opp/ti,omap-opp-supply.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Texas Instruments OMAP compatible OPP supply |
| 8 | |
| 9 | description: |
| 10 | OMAP5, DRA7, and AM57 families of SoCs have Class 0 AVS eFuse |
| 11 | registers, which contain OPP-specific voltage information tailored |
| 12 | for the specific device. This binding provides the information |
| 13 | needed to describe such a hardware values and relate them to program |
| 14 | the primary regulator during an OPP transition. |
| 15 | |
| 16 | Also, some supplies may have an associated vbb-supply, an Adaptive |
| 17 | Body Bias regulator, which must transition in a specific sequence |
| 18 | w.r.t the vdd-supply and clk when making an OPP transition. By |
| 19 | supplying two regulators to the device that will undergo OPP |
| 20 | transitions, we can use the multi-regulator support implemented by |
| 21 | the OPP core to describe both regulators the platform needs. The |
| 22 | OPP core binding Documentation/devicetree/bindings/opp/opp-v2.yaml |
| 23 | provides further information (refer to Example 4 Handling multiple |
| 24 | regulators). |
| 25 | |
| 26 | maintainers: |
| 27 | - Nishanth Menon <nm@ti.com> |
| 28 | |
| 29 | properties: |
| 30 | $nodename: |
| 31 | pattern: '^opp-supply(@[0-9a-f]+)?$' |
| 32 | |
| 33 | compatible: |
| 34 | oneOf: |
| 35 | - description: Basic OPP supply controlling VDD and VBB |
| 36 | const: ti,omap-opp-supply |
| 37 | - description: OMAP5+ optimized voltages in efuse(Class 0) VDD along with |
| 38 | VBB. |
| 39 | const: ti,omap5-opp-supply |
| 40 | - description: OMAP5+ optimized voltages in efuse(class0) VDD but no VBB |
| 41 | const: ti,omap5-core-opp-supply |
| 42 | |
| 43 | reg: |
| 44 | maxItems: 1 |
| 45 | |
| 46 | ti,absolute-max-voltage-uv: |
| 47 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 48 | description: Absolute maximum voltage for the OPP supply in micro-volts. |
| 49 | minimum: 750000 |
| 50 | maximum: 1500000 |
| 51 | |
| 52 | ti,efuse-settings: |
| 53 | description: An array of u32 tuple items providing information about |
| 54 | optimized efuse configuration. |
| 55 | minItems: 1 |
| 56 | $ref: /schemas/types.yaml#/definitions/uint32-matrix |
| 57 | items: |
| 58 | items: |
| 59 | - description: Reference voltage in micro-volts (OPP Voltage) |
| 60 | minimum: 750000 |
| 61 | maximum: 1500000 |
| 62 | multipleOf: 10000 |
| 63 | - description: efuse offset where the optimized voltage is located |
| 64 | multipleOf: 4 |
| 65 | maximum: 256 |
| 66 | |
| 67 | required: |
| 68 | - compatible |
| 69 | - ti,absolute-max-voltage-uv |
| 70 | |
| 71 | allOf: |
| 72 | - if: |
| 73 | not: |
| 74 | properties: |
| 75 | compatible: |
| 76 | contains: |
| 77 | const: ti,omap-opp-supply |
| 78 | then: |
| 79 | required: |
| 80 | - reg |
| 81 | - ti,efuse-settings |
| 82 | |
| 83 | additionalProperties: false |
| 84 | |
| 85 | examples: |
| 86 | - | |
| 87 | opp-supply { |
| 88 | compatible = "ti,omap-opp-supply"; |
| 89 | ti,absolute-max-voltage-uv = <1375000>; |
| 90 | }; |
| 91 | - | |
| 92 | opp-supply@4a003b20 { |
| 93 | compatible = "ti,omap5-opp-supply"; |
| 94 | reg = <0x4a003b20 0x8>; |
| 95 | ti,efuse-settings = |
| 96 | /* uV offset */ |
| 97 | <1060000 0x0>, |
| 98 | <1160000 0x4>, |
| 99 | <1210000 0x8>; |
| 100 | ti,absolute-max-voltage-uv = <1500000>; |
| 101 | }; |