146 lines
5.0 KiB
YAML
146 lines
5.0 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright (C) 2020 Texas Instruments Incorporated
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# Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/ti,j721e-cpb-ivi-audio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Texas Instruments J721e Common Processor Board Audio Support
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maintainers:
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- Peter Ujfalusi <peter.ujfalusi@gmail.com>
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description: |
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The Infotainment board plugs into the Common Processor Board, the support of the
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extension board is extending the CPB audio support, decribed in:
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sound/ti,j721e-cpb-audio.txt
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The audio support on the Infotainment Expansion Board consists of McASP0
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connected to two pcm3168a codecs with dedicated set of serializers to each.
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The SCKI for pcm3168a is sourced from j721e AUDIO_REFCLK0 pin.
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In order to support 48KHz and 44.1KHz family of sampling rates the parent clock
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for AUDIO_REFCLK0 needs to be changed between PLL4 (for 48KHz) and PLL15 (for
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44.1KHz). The same PLLs are used for McASP0's AUXCLK clock via different
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HSDIVIDER.
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Note: the same PLL4 and PLL15 is used by the audio support on the CPB!
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Clocking setup for 48KHz family:
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PLL4 ---> PLL4_HSDIV0 ---> MCASP10_AUXCLK ---> McASP10.auxclk
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| |-> MCASP0_AUXCLK ---> McASP0.auxclk
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|-> PLL4_HSDIV2 ---> AUDIO_REFCLK2 ---> pcm3168a.SCKI
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|-> AUDIO_REFCLK0 ---> pcm3168a_a/b.SCKI
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Clocking setup for 44.1KHz family:
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PLL15 ---> PLL15_HSDIV0 ---> MCASP10_AUXCLK ---> McASP10.auxclk
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| |-> MCASP0_AUXCLK ---> McASP0.auxclk
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|-> PLL15_HSDIV2 ---> AUDIO_REFCLK2 ---> pcm3168a.SCKI
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|-> AUDIO_REFCLK0 ---> pcm3168a_a/b.SCKI
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properties:
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compatible:
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items:
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- const: ti,j721e-cpb-ivi-audio
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model:
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$ref: /schemas/types.yaml#/definitions/string
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description: User specified audio sound card name
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ti,cpb-mcasp:
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description: phandle to McASP used on CPB
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$ref: /schemas/types.yaml#/definitions/phandle
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ti,cpb-codec:
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description: phandle to the pcm3168a codec used on the CPB
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$ref: /schemas/types.yaml#/definitions/phandle
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ti,ivi-mcasp:
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description: phandle to McASP used on IVI
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$ref: /schemas/types.yaml#/definitions/phandle
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ti,ivi-codec-a:
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description: phandle to the pcm3168a-A codec on the expansion board
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$ref: /schemas/types.yaml#/definitions/phandle
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ti,ivi-codec-b:
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description: phandle to the pcm3168a-B codec on the expansion board
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$ref: /schemas/types.yaml#/definitions/phandle
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clocks:
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items:
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- description: AUXCLK clock for McASP used by CPB audio
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- description: Parent for CPB_McASP auxclk (for 48KHz)
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- description: Parent for CPB_McASP auxclk (for 44.1KHz)
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- description: SCKI clock for the pcm3168a codec on CPB
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- description: Parent for CPB_SCKI clock (for 48KHz)
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- description: Parent for CPB_SCKI clock (for 44.1KHz)
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- description: AUXCLK clock for McASP used by IVI audio
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- description: Parent for IVI_McASP auxclk (for 48KHz)
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- description: Parent for IVI_McASP auxclk (for 44.1KHz)
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- description: SCKI clock for the pcm3168a codec on IVI
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- description: Parent for IVI_SCKI clock (for 48KHz)
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- description: Parent for IVI_SCKI clock (for 44.1KHz)
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clock-names:
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items:
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- const: cpb-mcasp-auxclk
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- const: cpb-mcasp-auxclk-48000
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- const: cpb-mcasp-auxclk-44100
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- const: cpb-codec-scki
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- const: cpb-codec-scki-48000
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- const: cpb-codec-scki-44100
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- const: ivi-mcasp-auxclk
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- const: ivi-mcasp-auxclk-48000
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- const: ivi-mcasp-auxclk-44100
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- const: ivi-codec-scki
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- const: ivi-codec-scki-48000
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- const: ivi-codec-scki-44100
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required:
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- compatible
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- model
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- ti,cpb-mcasp
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- ti,cpb-codec
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- ti,ivi-mcasp
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- ti,ivi-codec-a
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- ti,ivi-codec-b
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- clocks
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- clock-names
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additionalProperties: false
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examples:
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- |+
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sound {
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compatible = "ti,j721e-cpb-ivi-audio";
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model = "j721e-cpb-ivi";
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ti,cpb-mcasp = <&mcasp10>;
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ti,cpb-codec = <&pcm3168a_1>;
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ti,ivi-mcasp = <&mcasp0>;
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ti,ivi-codec-a = <&pcm3168a_a>;
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ti,ivi-codec-b = <&pcm3168a_b>;
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clocks = <&k3_clks 184 1>,
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<&k3_clks 184 2>, <&k3_clks 184 4>,
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<&k3_clks 157 371>,
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<&k3_clks 157 400>, <&k3_clks 157 401>,
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<&k3_clks 174 1>,
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<&k3_clks 174 2>, <&k3_clks 174 4>,
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<&k3_clks 157 301>,
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<&k3_clks 157 330>, <&k3_clks 157 331>;
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clock-names = "cpb-mcasp-auxclk",
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"cpb-mcasp-auxclk-48000", "cpb-mcasp-auxclk-44100",
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"cpb-codec-scki",
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"cpb-codec-scki-48000", "cpb-codec-scki-44100",
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"ivi-mcasp-auxclk",
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"ivi-mcasp-auxclk-48000", "ivi-mcasp-auxclk-44100",
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"ivi-codec-scki",
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"ivi-codec-scki-48000", "ivi-codec-scki-44100";
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};
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