From patchwork Sat Jan 15 09:27:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12714352 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 2B677C4332F for ; Sat, 15 Jan 2022 09:27:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232725AbiAOJ1r (ORCPT ); Sat, 15 Jan 2022 04:27:47 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:58344 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229507AbiAOJ1q (ORCPT ); Sat, 15 Jan 2022 04:27:46 -0500 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 20F4QHs7005023; Sat, 15 Jan 2022 04:27:28 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3dkq81rvre-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 15 Jan 2022 04:27:28 -0500 Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 20F9RR4R015121 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sat, 15 Jan 2022 04:27:27 -0500 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) 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; Sat, 15 Jan 2022 04:27:26 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) 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; Sat, 15 Jan 2022 04:27:25 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Sat, 15 Jan 2022 04:27:25 -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 20F9RBL7010081; Sat, 15 Jan 2022 04:27:19 -0500 From: =?utf-8?q?Nuno_S=C3=A1?= To: , CC: Rob Herring , Jonathan Cameron , Lars-Peter Clausen , Michael Hennerich Subject: [PATCH v2 2/3] iio: ABI: add ABI file for the LTC2688 DAC Date: Sat, 15 Jan 2022 10:27:04 +0100 Message-ID: <20220115092705.491-3-nuno.sa@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220115092705.491-1-nuno.sa@analog.com> References: <20220115092705.491-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: QQUTE7eClWD3j_JRpGCYp288qEdlj2BT X-Proofpoint-ORIG-GUID: QQUTE7eClWD3j_JRpGCYp288qEdlj2BT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-15_01,2022-01-14_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=899 bulkscore=5 clxscore=1015 malwarescore=0 phishscore=0 mlxscore=0 suspectscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=5 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201150055 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Define the sysfs interface for toggle or dither capable channels. Dither capable channels will have the extended interface: * out_voltageY_dither_en * out_voltageY_dither_raw * out_voltageY_dither_offset * out_voltageY_dither_raw_available * out_voltageY_dither_frequency * out_voltageY_dither_frequency_available * out_voltageY_dither_phase * out_voltageY_dither_phase_available Toggle enabled channels will have: * out_voltageY_toggle_en * out_voltageY_raw0 * out_voltageY_raw1 * out_voltageY_symbol Signed-off-by: Nuno Sá --- .../ABI/testing/sysfs-bus-iio-dac-ltc2688 | 80 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 81 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 new file mode 100644 index 000000000000..38d1df81c6dc --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 @@ -0,0 +1,80 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_en +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Dither enable. Write 1 to enable dither or 0 to disable it. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + This raw, unscaled value refers to the dither signal amplitude. + The same scale as in out_voltageY_raw applies. However, the + offset might be different as it's always 0 for this attribute. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw_available +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Available range for dither raw amplitude values. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_offset +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Offset applied to out_voltageY_dither_raw. Read only attribute + always set to 0. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Sets the dither signal frequency. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency_available +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Returns the available values for the dither frequency. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Sets the dither signal phase. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase_available +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Returns the available values for the dither phase. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Toggle enable. Write 1 to enable toggle or 0 to disable it. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw0 +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + It has the same meaning as out_voltageY_raw. This attribute is + specific to toggle enabled channels and refers to the DAC output + code in INPUT_A. The same scale, offset, etc applies. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw1 +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Same as out_voltageY_raw0 but referring to the DAC output code + in INPUT_B. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol +KernelVersion: 5.17 +Contact: linux-iio@vger.kernel.org +Description: + Performs a SW toggle. This attribute is specific to toggle + enabled channels and allows to toggle between out_voltageY_raw + and out_voltageY_raw1 through software. Writing 0 will select + out_voltageY_raw while 1 selects out_voltageY_raw1. diff --git a/MAINTAINERS b/MAINTAINERS index 16e344d52b1e..16a7fd7f98ee 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11187,6 +11187,7 @@ M: Nuno Sá 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: drivers/iio/dac/ltc2688.c LTC2947 HARDWARE MONITOR DRIVER