From patchwork Fri Feb 25 13:01:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12760206 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2722EC43217 for ; Fri, 25 Feb 2022 13:02:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238247AbiBYNCl (ORCPT ); Fri, 25 Feb 2022 08:02:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237490AbiBYNCk (ORCPT ); Fri, 25 Feb 2022 08:02:40 -0500 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1C2E1903FD; Fri, 25 Feb 2022 05:02:07 -0800 (PST) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 21P66Cd4002715; Fri, 25 Feb 2022 08:01:50 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3eesj39j6w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 25 Feb 2022 08:01:49 -0500 Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 21PD1mnp013418 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 25 Feb 2022 08:01:48 -0500 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Fri, 25 Feb 2022 08:01:47 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB5.ad.analog.com (10.64.17.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Fri, 25 Feb 2022 08:01:47 -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; Fri, 25 Feb 2022 08:01:47 -0500 Received: from NSA-L01.ad.analog.com ([10.32.224.71]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 21PD1WL4024659; Fri, 25 Feb 2022 08:01:41 -0500 From: =?utf-8?q?Nuno_S=C3=A1?= To: , CC: Rob Herring , Jonathan Cameron , Lars-Peter Clausen , Michael Hennerich Subject: [PATCH v4 3/3] dt-bindings: iio: Add ltc2688 documentation Date: Fri, 25 Feb 2022 14:01:29 +0100 Message-ID: <20220225130129.69-4-nuno.sa@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220225130129.69-1-nuno.sa@analog.com> References: <20220225130129.69-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: pqGhaVoMMejhM1bW81J9d92U9Z7wGQF7 X-Proofpoint-ORIG-GUID: pqGhaVoMMejhM1bW81J9d92U9Z7wGQF7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-02-25_07,2022-02-25_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=999 suspectscore=0 mlxscore=0 spamscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202250074 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Document the LTC2688 devicetree properties. Signed-off-by: Nuno Sá Reviewed-by: Rob Herring --- .../bindings/iio/dac/adi,ltc2688.yaml | 146 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 147 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml new file mode 100644 index 000000000000..48f9e7d29423 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml @@ -0,0 +1,146 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices LTC2688 DAC + +maintainers: + - Nuno Sá + +description: | + Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC + https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf + +properties: + compatible: + enum: + - adi,ltc2688 + + reg: + maxItems: 1 + + vcc-supply: + description: Analog Supply Voltage Input. + + iovcc-supply: + description: Digital Input/Output Supply Voltage. + + vref-supply: + description: + Reference Input/Output. The voltage at the REF pin sets the full-scale + range of all channels. If not provided the internal reference is used and + also provided on the VREF pin". + + clr-gpios: + description: + If specified, it will be asserted during driver probe. As the line is + active low, it should be marked GPIO_ACTIVE_LOW. + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +patternProperties: + "^channel@([0-9]|1[0-5])$": + type: object + + properties: + reg: + description: The channel number representing the DAC output channel. + maximum: 15 + + adi,toggle-mode: + description: + Set the channel as a toggle enabled channel. Toggle operation enables + fast switching of a DAC output between two different DAC codes without + any SPI transaction. + type: boolean + + adi,output-range-microvolt: + description: Specify the channel output full scale range. + oneOf: + - items: + - const: 0 + - enum: [5000000, 10000000] + - items: + - const: -5000000 + - const: 5000000 + - items: + - const: -10000000 + - const: 10000000 + - items: + - const: -15000000 + - const: 15000000 + + adi,overrange: + description: Enable 5% overrange over the selected full scale range. + type: boolean + + clocks: + maxItems: 1 + + adi,toggle-dither-input: + description: + Selects the TGPx pin to be associated with this channel. This setting + only makes sense for toggle or dither enabled channels. If + @adi,toggle-mode is not set and this property is given, the channel is + assumed to be a dither capable channel. Note that multiple channels + can be mapped to the same pin. If this setting is given, the + respective @clock must also be provided. Mappings between this and + input pins + 0 - TGP1 + 1 - TGP2 + 2 - TGP3 + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2] + + dependencies: + adi,toggle-dither-input: [ clocks ] + + required: + - reg + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + + spi { + #address-cells = <1>; + #size-cells = <0>; + ltc2688: ltc2688@0 { + compatible = "adi,ltc2688"; + reg = <0>; + + vcc-supply = <&vcc>; + iovcc-supply = <&vcc>; + vref-supply = <&vref>; + + #address-cells = <1>; + #size-cells = <0>; + channel@0 { + reg = <0>; + adi,toggle-mode; + adi,overrange; + }; + + channel@1 { + reg = <1>; + adi,output-range-microvolt = <0 10000000>; + + clocks = <&clock_tgp3>; + adi,toggle-dither-input = <2>; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index fd22f126dc01..cd81378f5081 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11315,6 +11315,7 @@ L: linux-iio@vger.kernel.org S: Supported W: http://ez.analog.com/community/linux-device-drivers F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 +F: Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml F: drivers/iio/dac/ltc2688.c LTC2947 HARDWARE MONITOR DRIVER