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Thu, 6 Mar 2025 16:01:14 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Thu, 6 Mar 2025 16:01:14 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Thu, 6 Mar 2025 16:01:14 -0500 Received: from JSANTO12-L01.ad.analog.com ([10.65.60.206]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 526L0whb011460; Thu, 6 Mar 2025 16:01:00 -0500 From: Jonathan Santos To: , , , CC: Jonathan Santos , , , , , , , , , , , , , , Subject: [PATCH v4 03/17] dt-bindings: iio: adc: ad7768-1: add trigger-sources property Date: Thu, 6 Mar 2025 18:00:56 -0300 Message-ID: <4136b5259df75221fc314bcd4a57ecaeeab41a45.1741268122.git.Jonathan.Santos@analog.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: RV_zPSangsWcmFNWAW0m0b2XgaXBZxWV X-Proofpoint-ORIG-GUID: RV_zPSangsWcmFNWAW0m0b2XgaXBZxWV X-Authority-Analysis: v=2.4 cv=VNcnn8PX c=1 sm=1 tr=0 ts=67ca0d1b cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=Vs1iUdzkB0EA:10 a=gAnH3GRIAAAA:8 a=1BXouof-NqooHmoyBnsA:9 a=ll8Ng6K2x5dEghGH17xW:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-06_07,2025-03-06_04,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 spamscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 suspectscore=0 adultscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503060160 In addition to GPIO synchronization, The AD7768-1 also supports synchronization over SPI, which use is recommended when the GPIO cannot provide a pulse synchronous with the base MCLK signal. It consists of looping back the SYNC_OUT to the SYNC_IN pin and send a command via SPI to trigger the synchronization. Add a new trigger-sources property to enable synchronization over SPI and future multiple devices support. This property references the main device (or trigger provider) responsible for generating the SYNC_OUT pulse to drive the SYNC_IN of device. While at it, add description to the interrupts property. Signed-off-by: Jonathan Santos --- v4 Changes: * none v3 Changes: * Fixed dt-bindings errors. * Trigger-source is set as an alternative to sync-in-gpios, so we don't break the previous ABI. * increased maxItems from trigger-sources to 2. v2 Changes: * Patch added as replacement for adi,sync-in-spi patch. * addressed the request for a description to interrupts property. --- .../bindings/iio/adc/adi,ad7768-1.yaml | 28 +++++++++++++++++-- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml index 3ce59d4d065f..4bcc9e20fab9 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml @@ -26,7 +26,19 @@ properties: clock-names: const: mclk + trigger-sources: + description: + Specifies the device responsible for driving the synchronization pin, + as an alternative to adi,sync-in-gpios. If the own device node is + referenced, The synchronization over SPI is enabled and the SYNC_OUT + output will drive the SYNC_IN pin. + maxItems: 2 + interrupts: + description: + Specifies the interrupt line associated with the ADC. This refers + to the DRDY (Data Ready) pin, which signals when conversion results are + available. maxItems: 1 '#address-cells': @@ -57,6 +69,9 @@ properties: "#io-channel-cells": const: 1 + "#trigger-source-cells": + const: 0 + required: - compatible - reg @@ -65,7 +80,6 @@ required: - vref-supply - spi-cpol - spi-cpha - - adi,sync-in-gpios patternProperties: "^channel@([0-9]|1[0-5])$": @@ -89,6 +103,13 @@ patternProperties: allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# + - oneOf: + - required: + - trigger-sources + - "#trigger-source-cells" + - required: + - adi,sync-in-gpios + unevaluatedProperties: false examples: @@ -99,7 +120,7 @@ examples: #address-cells = <1>; #size-cells = <0>; - adc@0 { + adc0: adc@0 { compatible = "adi,ad7768-1"; reg = <0>; spi-max-frequency = <2000000>; @@ -108,7 +129,8 @@ examples: vref-supply = <&adc_vref>; interrupts = <25 IRQ_TYPE_EDGE_RISING>; interrupt-parent = <&gpio>; - adi,sync-in-gpios = <&gpio 22 GPIO_ACTIVE_LOW>; + trigger-sources = <&adc0 0>; + #trigger-source-cells = <0>; reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>; clocks = <&ad7768_mclk>; clock-names = "mclk";