From patchwork Mon Sep 12 08:12:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12973415 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 D0BE4C6FA83 for ; Mon, 12 Sep 2022 08:11:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229997AbiILILp (ORCPT ); Mon, 12 Sep 2022 04:11:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229882AbiILILm (ORCPT ); Mon, 12 Sep 2022 04:11:42 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D426F24F33; Mon, 12 Sep 2022 01:11:41 -0700 (PDT) Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 28C5LsfQ020124; Mon, 12 Sep 2022 04:11:22 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3jgme5mnkx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Sep 2022 04:11:22 -0400 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 28C8BKqk062620 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 12 Sep 2022 04:11:20 -0400 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; Mon, 12 Sep 2022 04:11:20 -0400 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; Mon, 12 Sep 2022 04:11:19 -0400 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; Mon, 12 Sep 2022 04:11:19 -0400 Received: from nsa.ad.analog.com ([10.44.3.57]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 28C8B4Hg011932; Mon, 12 Sep 2022 04:11:14 -0400 From: =?utf-8?q?Nuno_S=C3=A1?= To: , CC: Michael Hennerich , Lars-Peter Clausen , Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Krzysztof Kozlowski , Rob Herring Subject: [PATCH v2 2/3] iio: adc: ad7923: support extended range Date: Mon, 12 Sep 2022 10:12:22 +0200 Message-ID: <20220912081223.173584-3-nuno.sa@analog.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220912081223.173584-1-nuno.sa@analog.com> References: <20220912081223.173584-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: rXSSxqIhsvqv9Jlr_tn2iskcmFK5b5v_ X-Proofpoint-ORIG-GUID: rXSSxqIhsvqv9Jlr_tn2iskcmFK5b5v_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-12_04,2022-09-09_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 phishscore=0 bulkscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 suspectscore=0 mlxscore=0 malwarescore=0 lowpriorityscore=0 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209120027 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org By default the driver was always setting the RANGE bit which means that the analog input goes from 0 to VREF. However, we might want to have 0 to 2xVREF. This change adds a new Firmware property to allow for the extended range while keeping the default behavior if nothing is provided. Signed-off-by: Nuno Sá --- drivers/iio/adc/ad7923.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c index 502253f53d96..9d6bf6d0927a 100644 --- a/drivers/iio/adc/ad7923.c +++ b/drivers/iio/adc/ad7923.c @@ -8,6 +8,7 @@ #include #include +#include #include #include #include @@ -300,6 +301,7 @@ static void ad7923_regulator_disable(void *data) static int ad7923_probe(struct spi_device *spi) { + u32 ad7923_range = AD7923_RANGE; struct ad7923_state *st; struct iio_dev *indio_dev; const struct ad7923_chip_info *info; @@ -311,8 +313,11 @@ static int ad7923_probe(struct spi_device *spi) st = iio_priv(indio_dev); + if (device_property_read_bool(&spi->dev, "adi,range-double")) + ad7923_range = 0; + st->spi = spi; - st->settings = AD7923_CODING | AD7923_RANGE | + st->settings = AD7923_CODING | ad7923_range | AD7923_PM_MODE_WRITE(AD7923_PM_MODE_OPS); info = &ad7923_chip_info[spi_get_device_id(spi)->driver_data];