From patchwork Thu Dec 7 18:41:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Schmitt X-Patchwork-Id: 13483787 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D00391720; Thu, 7 Dec 2023 10:42:05 -0800 (PST) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3B7F6YCJ008116; Thu, 7 Dec 2023 13:41:47 -0500 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3utd13spct-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 07 Dec 2023 13:41:46 -0500 (EST) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 3B7Ifjk0024710 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 7 Dec 2023 13:41:45 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) 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; Thu, 7 Dec 2023 13:41:44 -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; Thu, 7 Dec 2023 13:41:44 -0500 Received: from work.ad.analog.com (HYB-hERzalRezfV.ad.analog.com [10.65.205.129]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 3B7IfP2U015375; Thu, 7 Dec 2023 13:41:28 -0500 From: Marcelo Schmitt To: , , , , , , , , , , , , CC: , , Subject: [PATCH v3 08/13] iio: adc: ad7091r: Enable internal vref if external vref is not supplied Date: Thu, 7 Dec 2023 15:41:25 -0300 Message-ID: <0c71001f4c1eba169230caee6640661cec4b979b.1701971344.git.marcelo.schmitt1@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: qU_7KtquRmM1r1sw3EKpQ34SV8WISxd2 X-Proofpoint-GUID: qU_7KtquRmM1r1sw3EKpQ34SV8WISxd2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-02_01,2023-11-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 spamscore=0 phishscore=0 adultscore=0 malwarescore=0 priorityscore=1501 mlxlogscore=863 suspectscore=0 bulkscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312070156 The ADC needs a voltage reference to work correctly. Enable AD7091R internal voltage reference if no external vref is supplied. Signed-off-by: Marcelo Schmitt --- drivers/iio/adc/ad7091r-base.c | 9 ++++++--- drivers/iio/adc/ad7091r-base.h | 1 + 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c index f2cb638b8d77..59a7ec44955d 100644 --- a/drivers/iio/adc/ad7091r-base.c +++ b/drivers/iio/adc/ad7091r-base.c @@ -215,10 +215,13 @@ int ad7091r_probe(struct device *dev, const char *name, iio_dev->channels = st->chip_info->channels; st->vref = devm_regulator_get_optional(dev, "vref"); - if (IS_ERR(st->vref)) { - if (PTR_ERR(st->vref) == -EPROBE_DEFER) - return -EPROBE_DEFER; + if (IS_ERR_OR_NULL(st->vref)) { + /* Enable internal vref */ st->vref = NULL; + ret = regmap_update_bits(st->map, AD7091R_REG_CONF, + AD7091R_REG_CONF_INT_VREF, BIT(0)); + if (ret) + return ret; } else { ret = regulator_enable(st->vref); if (ret) diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h index 9546d0bf1da7..e153c2d7deb5 100644 --- a/drivers/iio/adc/ad7091r-base.h +++ b/drivers/iio/adc/ad7091r-base.h @@ -20,6 +20,7 @@ #define AD7091R_REG_CH_HYSTERESIS(ch) ((ch) * 3 + 6) /* AD7091R_REG_CONF */ +#define AD7091R_REG_CONF_INT_VREF BIT(0) #define AD7091R_REG_CONF_ALERT_EN BIT(4) #define AD7091R_REG_CONF_AUTO BIT(8) #define AD7091R_REG_CONF_CMD BIT(10)