From patchwork Wed Jan 29 14:22:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11356229 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B9425159A for ; Wed, 29 Jan 2020 14:21:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A28E620720 for ; Wed, 29 Jan 2020 14:21:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726623AbgA2OVi (ORCPT ); Wed, 29 Jan 2020 09:21:38 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:6330 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726178AbgA2OVh (ORCPT ); Wed, 29 Jan 2020 09:21:37 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00TEF8kV004865; Wed, 29 Jan 2020 09:21:14 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 2xrgdbv9tq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Jan 2020 09:21:14 -0500 Received: from SCSQMBX10.ad.analog.com (scsqmbx10.ad.analog.com [10.77.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 00TELC5g039266 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Wed, 29 Jan 2020 09:21:12 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by SCSQMBX10.ad.analog.com (10.77.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Wed, 29 Jan 2020 06:21:10 -0800 Received: from zeus.spd.analog.com (10.64.82.11) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Wed, 29 Jan 2020 09:21:10 -0500 Received: from ben-Latitude-E6540.ad.analog.com ([10.48.65.231]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 00TEKwxf027599; Wed, 29 Jan 2020 09:21:07 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia Subject: [PATCH v4 1/5] iio: core: Handle 'dB' suffix in core Date: Wed, 29 Jan 2020 16:22:57 +0200 Message-ID: <20200129142301.13918-2-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200129142301.13918-1-beniamin.bia@analog.com> References: <20200129142301.13918-1-beniamin.bia@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-29_03:2020-01-28,2020-01-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 clxscore=1015 phishscore=0 malwarescore=0 spamscore=0 adultscore=0 priorityscore=1501 mlxlogscore=999 suspectscore=1 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2001290118 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch handles the db suffix used for writing micro db values. Signed-off-by: Beniamin Bia --- drivers/iio/industrialio-core.c | 35 ++++++++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 65ff0d067018..b70111837420 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -769,17 +769,18 @@ static ssize_t iio_read_channel_info_avail(struct device *dev, } /** - * iio_str_to_fixpoint() - Parse a fixed-point number from a string + * __iio_str_to_fixpoint() - Parse a fixed-point number from a string * @str: The string to parse * @fract_mult: Multiplier for the first decimal place, should be a power of 10 * @integer: The integer part of the number * @fract: The fractional part of the number + * @scale_db: True if this should parse as dB * * Returns 0 on success, or a negative error code if the string could not be * parsed. */ -int iio_str_to_fixpoint(const char *str, int fract_mult, - int *integer, int *fract) +int __iio_str_to_fixpoint(const char *str, int fract_mult, + int *integer, int *fract, bool scale_db) { int i = 0, f = 0; bool integer_part = true, negative = false; @@ -810,6 +811,10 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, break; else return -EINVAL; + } else if (!strncmp(str, " dB", sizeof(" dB") - 1) && scale_db) { + /* Ignore the dB suffix */ + str += sizeof(" dB") - 1; + continue; } else if (*str == '.' && integer_part) { integer_part = false; } else { @@ -832,6 +837,22 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, } EXPORT_SYMBOL_GPL(iio_str_to_fixpoint); +/** + * iio_str_to_fixpoint() - Parse a fixed-point number from a string + * @str: The string to parse + * @fract_mult: Multiplier for the first decimal place, should be a power of 10 + * @integer: The integer part of the number + * @fract: The fractional part of the number + * + * Returns 0 on success, or a negative error code if the string could not be + * parsed. + */ +int iio_str_to_fixpoint(const char *str, int fract_mult, + int *integer, int *fract) +{ + return __iio_str_to_fixpoint(str, fract_mult, integer, fract, false); +} + static ssize_t iio_write_channel_info(struct device *dev, struct device_attribute *attr, const char *buf, @@ -842,6 +863,7 @@ static ssize_t iio_write_channel_info(struct device *dev, int ret, fract_mult = 100000; int integer, fract = 0; bool is_char = false; + bool scale_db = false; /* Assumes decimal - precision based on number of digits */ if (!indio_dev->info->write_raw) @@ -853,6 +875,9 @@ static ssize_t iio_write_channel_info(struct device *dev, case IIO_VAL_INT: fract_mult = 0; break; + case IIO_VAL_INT_PLUS_MICRO_DB: + scale_db = true; + /* fall through */ case IIO_VAL_INT_PLUS_MICRO: fract_mult = 100000; break; @@ -877,6 +902,10 @@ static ssize_t iio_write_channel_info(struct device *dev, if (ret) return ret; } + ret = __iio_str_to_fixpoint(buf, fract_mult, &integer, &fract, + scale_db); + if (ret) + return ret; ret = indio_dev->info->write_raw(indio_dev, this_attr->c, integer, fract, this_attr->address);