From patchwork Tue Feb 4 10:10:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier MOYSAN X-Patchwork-Id: 11364371 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 8382E14B4 for ; Tue, 4 Feb 2020 10:11:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6075A217BA for ; Tue, 4 Feb 2020 10:11:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fO8gaZxj"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=st.com header.i=@st.com header.b="Lsm6BuNW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6075A217BA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=JEWbNNwQ7gUO2dH1KOh4aK2CE8UX5XjKRMKdV9MxgDo=; b=fO8gaZxjFCqJHd LIQU/YOqCM5co9yDaCI7I/9PwIPvDKpnvKuXuaapC7gYZrg8CGwpE6+XCV4U7bt5pnF8yy7SaQtSg 661w2Z988H0nAb5lyXm/nMOpXaulTQJLb7dAIR1fr6WpYrqS65DlnsmOHFIRpEoC74oun4lA+nEf1 CAVQHlAO5Wv+kxZChDE50zTIg4cjpb4HusuNkB9+Znt2USluEI535JlLlDtMbmeiIXXHLQBCwRrKv Rd2vmMKWldVjf2sRXGVBzGcbpYRSazj+eAUXkWtSoK/oNHB6Bx9mvEhE/ojsBVGo2/0WSDB/QSW9T AxHhw9D/aRkcl96wEOBQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvAt-00015O-AI; Tue, 04 Feb 2020 10:11:19 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvAN-0000RI-32 for linux-arm-kernel@lists.infradead.org; Tue, 04 Feb 2020 10:10:49 +0000 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 014A5eas027812; Tue, 4 Feb 2020 11:10:37 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=LKI8G68MpBnrq3cMYnWhas9QoAyLUbV2xIYeGqpMMjQ=; b=Lsm6BuNWh6WT4pYMHdTJHrK2sHcXbMG9yVG/sZYxSqwQ8H7yXDXCFTKf4P8FXb1+6rci mVnmzXFeVrXOEvet4ooBwWqnzwpF8y4/Dx5BPXkeae11AEE03D8sTFDPeroaOi2pVhwy FR0vzizXk3sFMjJRErsNaiu/G19geAFyyrhoSp3CXblzJmzzqDuFiGLGmZYmYZKTFLDo VeUnYKo0K92T8bQ2aulVndYCzNtBqVyzp3q7O1SJjUiohbQ4XtbFFjlxrSi8fj9QlHmD AIkJKq2IenpXK6P9n1ksYQBPX8gY11f5uNtyUFGjuDnX7IXRFnttaNHvLWjLwQQIbDkZ 4A== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2xw0018516-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Feb 2020 11:10:37 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 3A97D100034; Tue, 4 Feb 2020 11:10:31 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag6node2.st.com [10.75.127.17]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 1FB952AD9D9; Tue, 4 Feb 2020 11:10:31 +0100 (CET) Received: from localhost (10.75.127.44) by SFHDAG6NODE2.st.com (10.75.127.17) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 4 Feb 2020 11:10:30 +0100 From: Olivier Moysan To: , , Subject: [PATCH 1/4] dt-bindings: iio: adc: sd modulator: add vref support Date: Tue, 4 Feb 2020 11:10:05 +0100 Message-ID: <20200204101008.11411-2-olivier.moysan@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200204101008.11411-1-olivier.moysan@st.com> References: <20200204101008.11411-1-olivier.moysan@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SFHDAG6NODE2.st.com (10.75.127.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-02-04_02:2020-02-04, 2020-02-04 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200204_021047_426735_E9E36B34 X-CRM114-Status: GOOD ( 11.58 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, lars@metafoo.de, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, pmeerw@pmeerw.net, knaack.h@gmx.de, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add vref supply support to sigma delta modulator. Signed-off-by: Olivier Moysan Acked-by: Rob Herring --- .../devicetree/bindings/iio/adc/sigma-delta-modulator.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml index a390343d0c2a..2afe0765e971 100644 --- a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml +++ b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml @@ -8,6 +8,7 @@ title: Device-Tree bindings for sigma delta modulator maintainers: - Arnaud Pouliquen + - Olivier Moysan properties: compatible: @@ -21,6 +22,9 @@ properties: '#io-channel-cells': const: 0 + vref-supply: + description: Phandle to the vref input analog reference voltage. + required: - compatible - '#io-channel-cells' From patchwork Tue Feb 4 10:10:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier MOYSAN X-Patchwork-Id: 11364363 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 EE23F14B4 for ; Tue, 4 Feb 2020 10:11:06 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A930F218AC for ; Tue, 4 Feb 2020 10:11:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="HrsetBpb"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=st.com header.i=@st.com header.b="jb6ZJy99" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A930F218AC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IzS0pKD3d6wP6Bn0xcSqtvP0LUFK5Npe6NkLZRuFRa4=; b=HrsetBpb57eE8G 5gtCqJ8yC80xeOT85jLWMJpYlOxHqeLGH9Rr5PD9FwAoA8rToyW4ZDJXRUwnhuoHd0YKS+bwDXlRi bAeeUAztrcSw/MOyATJo/Hkp4s/ZiZJZYSGtoTFPsbfKI/dJ8bQkrmtap/mVy9P0sIljKo29XzASJ HqahjbQOjnKPvX0yQuGjxVBCm39s44XxIdYibrXWlvG6bajKF+XQCo3KZ4rL6EtGqjAZHbcgvIa0/ CH3T+yvwTQtKnBBCSeHBLEWY1iZBFEEn3nJezPjc5m7eg/yXCik0SDUoTUxim7NIHbd0urkD67Ewa 6QiDE0HiCT3ZabR4P5ew==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvAb-0000jG-Ro; Tue, 04 Feb 2020 10:11:01 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvAL-0000RC-Vw for linux-arm-kernel@lists.infradead.org; Tue, 04 Feb 2020 10:10:49 +0000 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 014A908D023221; Tue, 4 Feb 2020 11:10:37 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=bynwKHOvmYrMdBjWIN3mSQft3h1Fd9t3e5EyZkaHA9g=; b=jb6ZJy99dPXxMR+ZgY85UOP7tZ1hkEEGmJa+dqeER6ysYB89DgS7P1KsngOwjBqXeR8Q qBGTNSpTE107VY0DRI/TQgLa0RN5m53AFg8ckzb98qAY+DiY3+Rj+8ojoW1ICZAQ/Zdh PqHYXGh3je0EzRCa3qDtwuEQCyk6JgKOHacr47iYXbgMBTG/H/w1K0XL5m6j0qBvlZ0k y4fUojNS4A06PF4db/dRnVgFrv/5QbWaSUvPX2i55L+a2h0sjLtN9UE6WCfEJGNS0OJ2 vfWEeKmxSUxUcOPMPfo8fPhkOo9CVgUXUemqs5Au3cYsbHpzVyKXVn6ebMra+RCrx37H xA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2xvyp606r1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Feb 2020 11:10:37 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9C95910003A; Tue, 4 Feb 2020 11:10:32 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag6node2.st.com [10.75.127.17]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 884552AD9DC; Tue, 4 Feb 2020 11:10:32 +0100 (CET) Received: from localhost (10.75.127.44) by SFHDAG6NODE2.st.com (10.75.127.17) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 4 Feb 2020 11:10:32 +0100 From: Olivier Moysan To: , , Subject: [PATCH 3/4] iio: adc: stm32-dfsdm: use resolution define Date: Tue, 4 Feb 2020 11:10:07 +0100 Message-ID: <20200204101008.11411-4-olivier.moysan@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200204101008.11411-1-olivier.moysan@st.com> References: <20200204101008.11411-1-olivier.moysan@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG3NODE3.st.com (10.75.127.9) To SFHDAG6NODE2.st.com (10.75.127.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-02-04_02:2020-02-04, 2020-02-04 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200204_021046_526076_E1BE9FDF X-CRM114-Status: GOOD ( 13.85 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, lars@metafoo.de, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, pmeerw@pmeerw.net, knaack.h@gmx.de, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Use resolution define instead of hard coded value. Signed-off-by: Olivier Moysan --- drivers/iio/adc/stm32-dfsdm-adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 2aad2cda6943..07b9dfdf8e76 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -1440,7 +1440,7 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev, ch->scan_type.shift = 8; } ch->scan_type.sign = 's'; - ch->scan_type.realbits = 24; + ch->scan_type.realbits = DFSDM_DATA_RES; ch->scan_type.storagebits = 32; return stm32_dfsdm_chan_configure(adc->dfsdm, From patchwork Tue Feb 4 10:10:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier MOYSAN X-Patchwork-Id: 11364373 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 F1898112B for ; Tue, 4 Feb 2020 10:11:34 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CED6121D7D for ; Tue, 4 Feb 2020 10:11:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="L3XD/1pD"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=st.com header.i=@st.com header.b="UNfs1fTp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CED6121D7D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Qq7HKL9i3b1DzNvoS7BKzbOtiDZoA0XZqdOU0/5yZbo=; b=L3XD/1pDvb1X1b 3ABsjMJ7T1fleMDUUbwyaMkUoh5jlTN9+o9Gk4zhihpvNqDGRzbsfTl1xj5l5mc62GwNw6VNvi4J3 5KwR/+RsKXujnGk05rYiYj3IxhGPlmep928qQVkW0ye4mTRvakLcl5TShp6KOsU05OiAhOQH/W46E gbHMePbrYp5USi143LzXdBXy7Y2wq5VY2J/rR5mtoitNeycPCWDLJ3lItsdIfU3jYpKnv27ePK9Bi pvS7JVPdnWZEiLA44oewsvj1llUNyz29npKa2UTRUG17DJatDmmLGI27N9AJt/pjHJYgcQ2gy+tPg y+mRqMkXrHMnSFAYFMWg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvB2-0001Gq-Cs; Tue, 04 Feb 2020 10:11:28 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyvAM-0000RD-6h for linux-arm-kernel@lists.infradead.org; Tue, 04 Feb 2020 10:10:49 +0000 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 014A7pji011091; Tue, 4 Feb 2020 11:10:37 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=bhdUjCl28U8mxH7dOdR1VAauDSxTC8bwI7sY3gTd9YU=; b=UNfs1fTp+4E4c4FmHuRM99P110CzEtE7UckSzL3ukGDivoVQ6GE1nL0nDRrcsQE0UYXZ 59RmKsj4LK18HMkZ5GoOHBip9A7TN4tvedcV1YgQyNkJF/Zqlkv0DOsTwv68It8yEjOC 9aAjl6vtWyJSWxxxc9KI+ZvPvexMr9tfpuMt9eLRUS+FfRvNFTaVQb1MfeCOxDhp8voI Ho+AA0SYipuLsTnvwgGsnQ2LesX0weR4qQ+DAdG1AuUFeGQF3YJxyzwSeJ8On5yCaJ7p llG0Y/+lZNSEOBXNEWtYRJVWHDgczg1o3VUcnRIGJuGLPe8bKkg4gjF1CNxoAjH2Iixc dw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2xvybe0hhm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Feb 2020 11:10:37 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 5908310003B; Tue, 4 Feb 2020 11:10:33 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag6node2.st.com [10.75.127.17]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 49AFC2AD9D9; Tue, 4 Feb 2020 11:10:33 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG6NODE2.st.com (10.75.127.17) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 4 Feb 2020 11:10:32 +0100 From: Olivier Moysan To: , , Subject: [PATCH 4/4] iio: adc: stm32-dfsdm: add scale and offset support Date: Tue, 4 Feb 2020 11:10:08 +0100 Message-ID: <20200204101008.11411-5-olivier.moysan@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200204101008.11411-1-olivier.moysan@st.com> References: <20200204101008.11411-1-olivier.moysan@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG3NODE3.st.com (10.75.127.9) To SFHDAG6NODE2.st.com (10.75.127.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-02-04_02:2020-02-04, 2020-02-04 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200204_021046_533877_45432E1E X-CRM114-Status: GOOD ( 19.86 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [91.207.212.93 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, lars@metafoo.de, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, pmeerw@pmeerw.net, knaack.h@gmx.de, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add scale and offset attributes support to STM32 DFSDM. Signed-off-by: Olivier Moysan --- drivers/iio/adc/stm32-dfsdm-adc.c | 105 +++++++++++++++++++++++++++++- 1 file changed, 102 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 07b9dfdf8e76..b85fd3e90496 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -67,6 +68,13 @@ struct stm32_dfsdm_dev_data { const struct regmap_config *regmap_cfg; }; +struct stm32_dfsdm_sd_chan_info { + int scale_val; + int scale_val2; + int offset; + unsigned int differential; +}; + struct stm32_dfsdm_adc { struct stm32_dfsdm *dfsdm; const struct stm32_dfsdm_dev_data *dev_data; @@ -79,6 +87,7 @@ struct stm32_dfsdm_adc { struct iio_hw_consumer *hwc; struct completion completion; u32 *buffer; + struct stm32_dfsdm_sd_chan_info *sd_chan; /* Audio specific */ unsigned int spi_freq; /* SPI bus clock frequency */ @@ -1271,7 +1280,10 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev, int *val2, long mask) { struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); - int ret; + struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id]; + struct stm32_dfsdm_filter_osr *flo = &fl->flo[fl->fast]; + u32 max = flo->max << (flo->lshift - chan->scan_type.shift); + int ret, idx = chan->scan_index; switch (mask) { case IIO_CHAN_INFO_RAW: @@ -1307,6 +1319,41 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev, *val = adc->sample_freq; return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + /* + * Scale is expressed in mV. + * When fast mode is disabled, actual resolution may be lower + * than 2^n, where n=realbits-1. + * This leads to underestimating input voltage. To + * compensate this deviation, the voltage reference can be + * corrected with a factor = realbits resolution / actual max + */ + *val = div_u64((u64)adc->sd_chan[idx].scale_val * + (u64)BIT(DFSDM_DATA_RES - 1), max); + *val2 = chan->scan_type.realbits; + if (adc->sd_chan[idx].differential) + *val *= 2; + + return IIO_VAL_FRACTIONAL_LOG2; + + case IIO_CHAN_INFO_OFFSET: + /* + * DFSDM output data are in the range [-2^n,2^n-1], + * with n=realbits-1. + * - Differential modulator: + * Offset correspond to SD modulator offset. + * - Single ended modulator: + * Input is in [0V,Vref] range, where 0V corresponds to -2^n. + * Add 2^n to offset. (i.e. middle of input range) + * offset = offset(sd) * vref / res(sd) * max / vref. + */ + *val = div_u64((u64)max * adc->sd_chan[idx].offset, + BIT(adc->sd_chan[idx].scale_val2 - 1)); + if (!adc->sd_chan[idx].differential) + *val += max; + + return IIO_VAL_INT; } return -EINVAL; @@ -1430,7 +1477,9 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev, * IIO_CHAN_INFO_RAW: used to compute regular conversion * IIO_CHAN_INFO_OVERSAMPLING_RATIO: used to set oversampling */ - ch->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); + ch->info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET); ch->info_mask_shared_by_all = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) | BIT(IIO_CHAN_INFO_SAMP_FREQ); @@ -1481,8 +1530,10 @@ static int stm32_dfsdm_adc_init(struct iio_dev *indio_dev) { struct iio_chan_spec *ch; struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); + struct iio_channel *channels, *chan; + struct stm32_dfsdm_sd_chan_info *sd_chan; int num_ch; - int ret, chan_idx; + int ret, chan_idx, val2; adc->oversamp = DFSDM_DEFAULT_OVERSAMPLING; ret = stm32_dfsdm_compute_all_osrs(indio_dev, adc->oversamp); @@ -1506,6 +1557,22 @@ static int stm32_dfsdm_adc_init(struct iio_dev *indio_dev) if (!ch) return -ENOMEM; + /* Get SD modulator channels */ + channels = iio_channel_get_all(&indio_dev->dev); + if (IS_ERR(channels)) { + dev_err(&indio_dev->dev, "Failed to get channel %ld\n", + PTR_ERR(channels)); + return PTR_ERR(channels); + } + chan = &channels[0]; + + adc->sd_chan = devm_kzalloc(&indio_dev->dev, + sizeof(*adc->sd_chan) * num_ch, GFP_KERNEL); + if (!adc->sd_chan) + return -ENOMEM; + + sd_chan = adc->sd_chan; + for (chan_idx = 0; chan_idx < num_ch; chan_idx++) { ch[chan_idx].scan_index = chan_idx; ret = stm32_dfsdm_adc_chan_init_one(indio_dev, &ch[chan_idx]); @@ -1513,6 +1580,38 @@ static int stm32_dfsdm_adc_init(struct iio_dev *indio_dev) dev_err(&indio_dev->dev, "Channels init failed\n"); return ret; } + + if (!chan->indio_dev) + return -EINVAL; + + ret = iio_read_channel_scale(chan, &sd_chan->scale_val, + &sd_chan->scale_val2); + if (ret < 0) { + dev_err(&indio_dev->dev, + "Failed to get channel %d scale\n", chan_idx); + return ret; + } + + if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_OFFSET)) { + ret = iio_read_channel_offset(chan, &sd_chan->offset, + &val2); + if (ret < 0) { + dev_err(&indio_dev->dev, + "Failed to get channel %d offset\n", + chan_idx); + return ret; + } + } + + sd_chan->differential = chan->channel->differential; + + dev_dbg(&indio_dev->dev, "Channel %d %s scale ref=%d offset=%d", + chan_idx, chan->channel->differential ? + "differential" : "single-ended", + sd_chan->scale_val, sd_chan->offset); + + chan++; + sd_chan++; } indio_dev->num_channels = num_ch;