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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/opp/ti,omap-opp-supply.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Texas Instruments OMAP compatible OPP supply
description:
OMAP5, DRA7, and AM57 families of SoCs have Class 0 AVS eFuse
registers, which contain OPP-specific voltage information tailored
for the specific device. This binding provides the information
needed to describe such a hardware values and relate them to program
the primary regulator during an OPP transition.
Also, some supplies may have an associated vbb-supply, an Adaptive
Body Bias regulator, which must transition in a specific sequence
w.r.t the vdd-supply and clk when making an OPP transition. By
supplying two regulators to the device that will undergo OPP
transitions, we can use the multi-regulator support implemented by
the OPP core to describe both regulators the platform needs. The
OPP core binding Documentation/devicetree/bindings/opp/opp-v2.yaml
provides further information (refer to Example 4 Handling multiple
regulators).
maintainers:
- Nishanth Menon <nm@ti.com>
properties:
$nodename:
pattern: '^opp-supply(@[0-9a-f]+)?$'
compatible:
oneOf:
- description: Basic OPP supply controlling VDD and VBB
const: ti,omap-opp-supply
- description: OMAP5+ optimized voltages in efuse(Class 0) VDD along with
VBB.
const: ti,omap5-opp-supply
- description: OMAP5+ optimized voltages in efuse(class0) VDD but no VBB
const: ti,omap5-core-opp-supply
reg:
maxItems: 1
ti,absolute-max-voltage-uv:
$ref: /schemas/types.yaml#/definitions/uint32
description: Absolute maximum voltage for the OPP supply in micro-volts.
minimum: 750000
maximum: 1500000
ti,efuse-settings:
description: An array of u32 tuple items providing information about
optimized efuse configuration.
minItems: 1
$ref: /schemas/types.yaml#/definitions/uint32-matrix
items:
items:
- description: Reference voltage in micro-volts (OPP Voltage)
minimum: 750000
maximum: 1500000
multipleOf: 10000
- description: efuse offset where the optimized voltage is located
multipleOf: 4
maximum: 256
required:
- compatible
- ti,absolute-max-voltage-uv
allOf:
- if:
not:
properties:
compatible:
contains:
const: ti,omap-opp-supply
then:
required:
- reg
- ti,efuse-settings
additionalProperties: false
examples:
- |
opp-supply {
compatible = "ti,omap-opp-supply";
ti,absolute-max-voltage-uv = <1375000>;
};
- |
opp-supply@4a003b20 {
compatible = "ti,omap5-opp-supply";
reg = <0x4a003b20 0x8>;
ti,efuse-settings =
/* uV offset */
<1060000 0x0>,
<1160000 0x4>,
<1210000 0x8>;
ti,absolute-max-voltage-uv = <1500000>;
};
|
