From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8DA793DB629; Tue, 29 Sep 2026 22:42:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.135.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790721776; cv=none; b=DXs0b6jOmgQ5+NlZABlXMOuE7IWHz/WZZYDdK59o8mClRnQBmKSwLcOVApDyiEQAu9yFsRxqI1qUU+tk6FCjzERBkbY44eli9VXmxEbHNSGM4gygqu3Yw5EQMBCNU/ch40bvVvDaHJOkdJGT2AT4bexce1pq8NDe/3hWbNUgSUg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790721776; c=relaxed/simple; bh=cZYy5H2cWcVcFKstV3y6Azq98fb6O17WQ6CFvtNpUOU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kCrKgEJWRS0di6JfCkDWwADHOX/+nynewja4KYgXgst57VH900xoLkh163ZZMfFscqjzeY1HzYOzseg864tRWBJ0Jba+PBOD6OzDPWiXViR80w3OtTNEaEJyB9S6FQ73g+DJ2TB0gw6uYMMK/Agc9FMG33D3dYXCiLzk4ddYli4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=analog.com; spf=pass smtp.mailfrom=analog.com; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b=IOqC522I; arc=none smtp.client-ip=148.163.135.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=analog.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=analog.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b="IOqC522I" Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 68TJn2xn1957991; Tue, 29 Sep 2026 18:42:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=DKIM; bh=RSM3A 4VBbYOYoqVXdHQdGLolZaAFP4dcpx55EId2+6M=; b=IOqC522IBc6HtMV8IB2dk fTPnOtOrWX0XtrROq7qs6TGNK94F1had8mXiZaY+VIeb9ywxzJpjGhDT9Nd9rwRV +CNz592vAcDBf3bpqwMHlM9wWvgPo5aly4rIjB4HWZ8sR8ZLZGAmgCRLAok3rpbB WmoKNkder6fV1k30lH7eITbQWN6otrlXXFemOY5mn+B1GgVvwsIKaYYUl6MyqzIU t0OmWbRsojIpukjXHFXwGeJShavlUxxzmeIIlu9YSfe1nqy4Ehl5syr3SD7I8rAU 41gAZQYHNybgYEOWnhxt3Io/raq6srXynou+jLlCdBAk8QxtUCNE5A33el6xAfc8 g== Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 4gyy3vffx3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Sep 2026 18:42:50 -0400 (EDT) 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 68TMgn4C030125 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 29 Sep 2026 18:42:49 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) 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 15.2.1748.37; Tue, 29 Sep 2026 18:42:48 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.37; Tue, 29 Sep 2026 18:42:48 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.1748.37 via Frontend Transport; Tue, 29 Sep 2026 18:42:48 -0400 Received: from work.maxim-ic.internal ([10.66.6.191]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 68TMgZPP008173; Tue, 29 Sep 2026 18:42:37 -0400 From: Marcelo Schmitt To: , , , CC: , , , , , , , , , , Subject: [PATCH v3 02/13] iio: adc: ad4134: Sign extend sample data Date: Tue, 29 Sep 2026 19:42:29 -0300 Message-ID: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: vRswZjLY1T9TGwzyD6DDoB3r_aNaTKb5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI5MDA5MCBTYWx0ZWRfX+mnFqCGk72Sm kJ1CEU+oz3a9liLvlPQ0njqAXq9ueDJh/FWxe3JBqToznax0fe+wauncznjIcicf1uL628LMhx8 a/mvaJklMxjYkwBTRZz4DNsEmF3rtYQMDY+Qm0aMRIARSIuJ/rKvE6UUEuURMVhWD22N7YpvQNR 8Kpz2n35/oUMhe9k4cJgJOTvNz59WevVUKvoDFVR6nbucHHlpwMrcabhOEjrV4OG2avL1Ma7pVi mXGs3c1pGwhcu54E3FSc8N3zwi2GaJU7fhccMVK55wRrJOe2Wib3aPVxv4Op/iotcGuPGTxZNiX M76tE8nhhz5+oi7Bhqz6uPuNlL6WwuwQawoSPSArvOwaWr1ZonV7zxL3k9lCVXv44DSV0StEg7t BcXyvUeg5o8RwPLAtgJMSDFhVXKoK5AHr/inj80xmlYWLq/s/O0zv1hY1U964qYqyuwF+MHz7VQ vLsdGguEyq+WxJZSigQ== X-Authority-Analysis: v=2.4 cv=Y/ltIReN c=1 sm=1 tr=0 ts=6abc3eea cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=Z0pTeXoby7EwIRygza74:22 a=gAnH3GRIAAAA:8 a=TOduCJ2NwqVHWOW4apYA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI5MDA5MCBTYWx0ZWRfXz42yDWY8ZjWA KO3GF5YSx8qEJUrDdBnEiEZR7DuPyGRY/i+dtsBm9krrz4vhAptnczGux3sJxJFYAif3jZYcZtR ecLLDBDWJY5cYZ5NbD4F4kElQtWv363sHy9e5Og/ZSvIV2Y6h3mu X-Proofpoint-ORIG-GUID: vRswZjLY1T9TGwzyD6DDoB3r_aNaTKb5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-29_04,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 lowpriorityscore=0 adultscore=0 suspectscore=0 impostorscore=0 spamscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609290090 Sign extend ADC sample data for correct delivery of negative ADC input difference. Fixes: e0bc6d7e2584 ("iio: adc: Initial support for AD4134") Signed-off-by: Marcelo Schmitt --- No changes in v3. drivers/iio/adc/ad4134.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad4134.c b/drivers/iio/adc/ad4134.c index e53c10b9a44a..6fdeb27d7a42 100644 --- a/drivers/iio/adc/ad4134.c +++ b/drivers/iio/adc/ad4134.c @@ -172,6 +172,7 @@ static int ad4134_data_read(struct ad4134_state *st, unsigned int reg, unsigned int *val) { unsigned int i; + u32 sample; int ret; /* @@ -196,8 +197,9 @@ static int ad4134_data_read(struct ad4134_state *st, unsigned int reg, * Clock out data from all channels to avoid that. */ if (i == AD4134_VREG_CH(reg)) - *val = get_unaligned_be24(st->rx_buf); + sample = get_unaligned_be24(st->rx_buf); } + *val = sign_extend32(sample, AD4134_CHAN_PRECISION_BITS - 1); return 0; } -- 2.53.0