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Thu, 9 Jul 2026 23:10:26 -0500 Received: from [10.249.72.86] ([10.249.72.86]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 66A4APYR2808243; Thu, 9 Jul 2026 23:10:25 -0500 Message-ID: Date: Thu, 9 Jul 2026 23:10:25 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/2] dt-bindings: sound: add Texas Instruments TAS2557 To: Gianluca Boiano , Mark Brown , Liam Girdwood , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Jaroslav Kysela" , Takashi Iwai CC: Shenghao Ding , Kevin Lu , "Baojun Xu" , , , References: <20260709221331.989109-1-morf3089@gmail.com> <20260709221331.989109-2-morf3089@gmail.com> Content-Language: en-US From: "Wang, Sen" In-Reply-To: <20260709221331.989109-2-morf3089@gmail.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00003AEB:EE_|CYXPR10MB7898:EE_ X-MS-Office365-Filtering-Correlation-Id: 4aecf5a8-6d80-46e4-c028-08dede392bff X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|23010399003|7416014|1800799024|376014|82310400026|3023799007|6133799003|4143699003|56012099006|22082099003|18002099003|13003099007; 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The device is controlled over I2C and > receives audio over I2S/TDM (ASI). It can drive a single mono speaker > or, as two devices, a stereo pair; in that case the ti,channel > property selects the audio slot each device reproduces and the > per-device tuning it applies. > > The on-chip DSP boots from a firmware image generated per speaker > design with the TI PurePath Console tuning tools; the optional > firmware-name property selects a board-specific image. > > Signed-off-by: Gianluca Boiano Hi Gianluca, thanks for the patch. > --- > .../devicetree/bindings/sound/ti,tas2557.yaml | 123 ++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 124 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/ti,tas2557.yaml > > diff --git a/Documentation/devicetree/bindings/sound/ti,tas2557.yaml b/Documentation/devicetree/bindings/sound/ti,tas2557.yaml > new file mode 100644 > index 000000000000..b1d1183c4a79 > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/ti,tas2557.yaml > @@ -0,0 +1,123 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +# Copyright (C) 2026 Gianluca Boiano > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/sound/ti,tas2557.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Texas Instruments TAS2557 Mono Smart Amplifier > + > +maintainers: > + - Gianluca Boiano > + > +description: | > + The TAS2557 is a mono, digital-input Class-D amplifier with an > + integrated DSP for speaker protection. Audio is carried over I2S/TDM > + (ASI). The on-chip DSP boots from a firmware image that is generated > + for a specific speaker design using the TI PurePath Console tuning > + tools. > + > + Stereo playback is built from two devices, each reproducing one audio > + slot selected through the ti,channel property and applying the > + matching per-device tuning contained in a stereo-tuned firmware > + image. > + > + Datasheet: https://www.ti.com/lit/gpn/tas2557 > + > +allOf: > + - $ref: dai-common.yaml# > + > +properties: > + compatible: > + const: ti,tas2557 > + > + reg: > + maxItems: 1 > + > + '#sound-dai-cells': > + const: 0 > + > + reset-gpios: > + maxItems: 1 > + description: GPIO connected to the active-low RESET pin. > + > + interrupts: > + maxItems: 1 > + description: Fault interrupt output (INT). > + > + vbat-supply: > + description: Battery/boost input supply (VBAT), 2.9 V to 5.5 V. > + > + iovdd-supply: > + description: Digital I/O supply, 1.62 V to 3.6 V. > + > + avdd-supply: > + description: Analog supply, 1.65 V to 1.95 V. > + > + dvdd-supply: > + description: Digital core supply, 1.65 V to 1.95 V. > + > + ti,imon-slot-no: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: TDM TX time slot for current-sense data. > + default: 0 > + minimum: 0 > + maximum: 7 > + > + ti,vmon-slot-no: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: TDM TX time slot for voltage-sense data. > + default: 2 > + minimum: 0 > + maximum: 7 > + > + ti,channel: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: | > + Audio slot of the stereo stream reproduced by this device (0 = > + left, 1 = right). With stereo firmware this also selects which > + per-device tuning set is applied. > + enum: [0, 1] > + default: 0 > + > + firmware-name: > + $ref: /schemas/types.yaml#/definitions/string > + description: | > + Name of the DSP firmware image to load. Defaults to a name > + derived from the silicon revision. Stereo systems typically use > + a stereo-tuned image shared by both devices. > + > +required: > + - compatible > + - reg > + - '#sound-dai-cells' + ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(tas2557_supplies), + tas2557_supplies); + if (ret) + return dev_err_probe(dev, ret, + "failed to get/enable supplies\n"); Looks like all supplies listed above is mandatory in the driver, please make sure you list them here in the required as well. Best, Sen Wang