1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/opp/ti,omap-opp-supply.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Texas Instruments OMAP compatible OPP supply
10 OMAP5, DRA7, and AM57 families of SoCs have Class 0 AVS eFuse
11 registers, which contain OPP-specific voltage information tailored
12 for the specific device. This binding provides the information
13 needed to describe such a hardware values and relate them to program
14 the primary regulator during an OPP transition.
16 Also, some supplies may have an associated vbb-supply, an Adaptive
17 Body Bias regulator, which must transition in a specific sequence
18 w.r.t the vdd-supply and clk when making an OPP transition. By
19 supplying two regulators to the device that will undergo OPP
20 transitions, we can use the multi-regulator support implemented by
21 the OPP core to describe both regulators the platform needs. The
22 OPP core binding Documentation/devicetree/bindings/opp/opp-v2.yaml
23 provides further information (refer to Example 4 Handling multiple
27 - Nishanth Menon <nm@ti.com>
31 pattern: '^opp-supply(@[0-9a-f]+)?$'
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
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
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.
53 description: An array of u32 tuple items providing information about
54 optimized efuse configuration.
56 $ref: /schemas/types.yaml#/definitions/uint32-matrix
59 - description: Reference voltage in micro-volts (OPP Voltage)
63 - description: efuse offset where the optimized voltage is located
69 - ti,absolute-max-voltage-uv
77 const: ti,omap-opp-supply
83 additionalProperties: false
88 compatible = "ti,omap-opp-supply";
89 ti,absolute-max-voltage-uv = <1375000>;
93 compatible = "ti,omap5-opp-supply";
94 reg = <0x4a003b20 0x8>;
100 ti,absolute-max-voltage-uv = <1500000>;