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Tue, 6 Feb 2024 06:58:28 +0000 Received: from AS8PR04MB8644.eurprd04.prod.outlook.com ([fe80::651a:dedd:945a:d1dd]) by AS8PR04MB8644.eurprd04.prod.outlook.com ([fe80::651a:dedd:945a:d1dd%6]) with mapi id 15.20.7249.035; Tue, 6 Feb 2024 06:58:28 +0000 From: Mike Looijmans To: devicetree@vger.kernel.org, linux-iio@vger.kernel.org CC: Mike Looijmans , Conor Dooley , Jonathan Cameron , Krzysztof Kozlowski , Lars-Peter Clausen , Rob Herring , linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: iio: adc: ti-ads1298: Add bindings Date: Tue, 6 Feb 2024 07:58:17 +0100 Message-ID: <20240206065818.2016910-1-mike.looijmans@topic.nl> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: AM0PR05CA0077.eurprd05.prod.outlook.com (2603:10a6:208:136::17) To AS8PR04MB8644.eurprd04.prod.outlook.com (2603:10a6:20b:42b::12) Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: AS8PR04MB8644:EE_|DBBPR04MB7787:EE_|AM3PEPF0000A797:EE_|DBBPR04MB7754:EE_ X-MS-Office365-Filtering-Correlation-Id: 3ca01208-57d1-421b-7a16-08dc26e10874 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; 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X-OriginatorOrg: topic.nl X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2024 06:58:32.8615 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3ca01208-57d1-421b-7a16-08dc26e10874 X-MS-Exchange-CrossTenant-Id: 449607a5-3517-482d-8d16-41dd868cbda3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=449607a5-3517-482d-8d16-41dd868cbda3;Ip=[20.93.157.195];Helo=[westeu11-emailsignatures-cloud.codetwo.com] X-MS-Exchange-CrossTenant-AuthSource: AM3PEPF0000A797.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBBPR04MB7754 Bindings for the TI ADS1298 medical ADC. This device is typically used for ECG and similar measurements. Supports data acquisition at configurable scale and sampling frequency. The device has so many options for connecting stuff, at this point the bindings aren't nearly complete but partial bindings are better than no bindings at all. Signed-off-by: Mike Looijmans Reviewed-by: Conor Dooley --- (no changes since v2) Changes in v2: Remove "clk" name Add datasheet and "incomplete" note .../bindings/iio/adc/ti,ads1298.yaml | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml new file mode 100644 index 000000000000..bf5a43a81d59 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/ti,ads1298.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments' ads1298 medical ADC chips + +description: | + Datasheet at: https://www.ti.com/product/ADS1298 + Bindings for this chip aren't complete. + +maintainers: + - Mike Looijmans + +properties: + compatible: + enum: + - ti,ads1298 + + reg: + maxItems: 1 + + spi-cpha: true + + reset-gpios: + maxItems: 1 + + avdd-supply: + description: + Analog power supply, voltage between AVDD and AVSS. When providing a + symmetric +/- 2.5V, the regulator should report 5V. + + vref-supply: + description: + Optional reference voltage. If omitted, internal reference is used, + which is 2.4V when analog supply is below 4.4V, 4V otherwise. + + clocks: + description: Optional 2.048 MHz external source clock on CLK pin + maxItems: 1 + + interrupts: + description: Interrupt on DRDY pin, triggers on falling edge + maxItems: 1 + + label: true + +required: + - compatible + - reg + - avdd-supply + - interrupts + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + #include + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@1 { + reg = <1>; + compatible = "ti,ads1298"; + label = "ads1298-1-ecg"; + avdd-supply = <®_iso_5v_a>; + clocks = <&clk_ads1298>; + interrupt-parent = <&gpio0>; + interrupts = <78 IRQ_TYPE_EDGE_FALLING>; + spi-max-frequency = <20000000>; + spi-cpha; + }; + }; +...