From patchwork Tue Dec 8 13:19:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Pop X-Patchwork-Id: 11958575 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02013C2BBCF for ; Tue, 8 Dec 2020 13:16:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3A8223AA9 for ; Tue, 8 Dec 2020 13:16:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729046AbgLHNQJ (ORCPT ); Tue, 8 Dec 2020 08:16:09 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:23754 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727135AbgLHNQI (ORCPT ); Tue, 8 Dec 2020 08:16:08 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0B8D9kI5009873; Tue, 8 Dec 2020 08:15:25 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 3584x99akd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 08 Dec 2020 08:15:25 -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 0B8DFOg4049673 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Tue, 8 Dec 2020 08:15:24 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 8 Dec 2020 08:15:23 -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 15.1.1779.2 via Frontend Transport; Tue, 8 Dec 2020 08:15:23 -0500 Received: from localhost.localdomain ([10.48.65.12]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 0B8DFKdT000595; Tue, 8 Dec 2020 08:15:22 -0500 From: Cristian Pop To: , CC: , , , Cristian Pop Subject: [PATCH v3 2/3] Documentation/ABI/testing: Add documentation for AD5766 new ABI Date: Tue, 8 Dec 2020 15:19:56 +0200 Message-ID: <20201208131957.34381-2-cristian.pop@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201208131957.34381-1-cristian.pop@analog.com> References: <20201208131957.34381-1-cristian.pop@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2020-12-08_09:2020-12-08,2020-12-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 adultscore=0 phishscore=0 mlxscore=0 clxscore=1015 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012080081 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org New interface is proposed for dither functionality. This future allows composing an external signals to the selected output channel. The dither signal can be turned on/off, scaled, inverted, or it can be selected from different sources. Signed-off-by: Cristian Pop --- .../ABI/testing/sysfs-bus-iio-dac-ad5766 | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 new file mode 100644 index 000000000000..361bbd0862df --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ad5766 @@ -0,0 +1,45 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_pwr +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Dither power on/off. Write 0 to power on dither or 1 to power it off. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_invert +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Inverts the dither applied to the selected DAC channel. Dither signal is + not inverted (default) Dither signal is inverted. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_scale_available +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Returns possible scalings available for the current channel: + "NO_SCALING 75%_SCALING 50%_SCALING 25%_SCALING" + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_scale +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Scales the dither before it is applied to the selected channel. + NO_SCALING - No scaling + 75%_SCALING - 75% scaling + 50%_SCALING - 50% scaling + 25%_SCALING - 25% scaling + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_source_available +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Returns possible dither sources available for the selected channel: + "NO_DITHER N0 N1" + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_dither_source +KernelVersion: +Contact: linux-iio@vger.kernel.org +Description: + Selects dither source applied to the selected channel. + NO_DITHER - No dither applied + N0 - N0 dither signal applied + N1 - N1 dither signal applied