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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/sound/nvidia,tegra210-peq.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Tegra210 PEQ
    8 
    9 description:
   10   The Parametric Equalizer (PEQ) is a cascade of biquad filters with
   11   each filter tuned based on certain parameters. It can be used to
   12   equalize the irregularities in the speaker frequency response.
   13   PEQ sits inside Output Processing Engine (OPE) which interfaces
   14   with Audio Hub (AHUB) via Audio Client Interface (ACIF).
   15 
   16 maintainers:
   17   - Jon Hunter <jonathanh@nvidia.com>
   18   - Mohan Kumar <mkumard@nvidia.com>
   19   - Sameer Pujar <spujar@nvidia.com>
   20 
   21 properties:
   22   compatible:
   23     oneOf:
   24       - const: nvidia,tegra210-peq
   25       - items:
   26           - enum:
   27               - nvidia,tegra234-peq
   28               - nvidia,tegra194-peq
   29               - nvidia,tegra186-peq
   30           - const: nvidia,tegra210-peq
   31 
   32   reg:
   33     maxItems: 1
   34 
   35 required:
   36   - compatible
   37   - reg
   38 
   39 additionalProperties: false
   40 
   41 examples:
   42   - |
   43     equalizer@702d8100 {
   44         compatible = "nvidia,tegra210-peq";
   45         reg = <0x702d8100 0x100>;
   46     };
   47 
   48 ...
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