From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5DA1C43613 for ; Sat, 22 Jun 2019 09:33:35 +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 765962075E for ; Sat, 22 Jun 2019 09:33:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="LjJiy8de"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="fjYvZv6S" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 765962075E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FN/aVLGSnnddOgL5/i5tI0pNZ2VRHlg9DNS76gXb1Fw=; b=LjJiy8deFV5moP DwZ6X1sHycCj3xi2z4XwNvLe7RWYVLMWB+MQwttkHUa3pCfFQ99DrrfKcWCBhCwrz8ituAmgUGsHD iZkznw1FaKpaQV5eo3hb5xiUfnSfK14jiV/g3v6oioJEf2TDHCcKLFWbpk4voAlohRwAMmIgWItJV PJCvroZNjH4dILqxyzhxlrcO7MwFowRURis+oiFD+BE2moLcliTeXsinrBgExD5unYxEG/9JXRneV SgyH0iBrYYmLiu+UHG6YE7UMFOEnyKgp0urjhtx9DG2mKKdHowg+WU7w+VTElKysao8HHu6KBpy4J JFNYqeT31Ah37qJNT5SQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hecOq-0003g1-8F; Sat, 22 Jun 2019 09:33:32 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hecOX-0003Lu-T8 for linux-arm-kernel@lists.infradead.org; Sat, 22 Jun 2019 09:33:15 +0000 Received: from archlinux (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1FF7B2075E; Sat, 22 Jun 2019 09:33:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561195993; bh=I0NwKMdM7grA72wdghATYuLC9S2scyeIRrURUSdnpWc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=fjYvZv6SCiSgFIbOvVkdSfPQMb3qP+hXn19RP8kVFsA+lDN0AXzmkMQhD7MlJOTjg ZkYP+qzVkxjnbrhWrqB/kjGwGGIn/h/kadTwkoc2V+ouCWMCHhhbEr73mbQ7KKrY1a yWlr8ul5/WMbgUn74wcqKyiNNfBqiaCvoi1GYyJc= Date: Sat, 22 Jun 2019 10:33:07 +0100 From: Jonathan Cameron To: Olivier Moysan Subject: Re: [PATCH 5/5] iio: adc: stm32-dfsdm: add comment for 16 bits record Message-ID: <20190622103307.50ba052b@archlinux> In-Reply-To: <1560949431-22948-6-git-send-email-olivier.moysan@st.com> References: <1560949431-22948-1-git-send-email-olivier.moysan@st.com> <1560949431-22948-6-git-send-email-olivier.moysan@st.com> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190622_023314_004209_2B9529F4 X-CRM114-Status: GOOD ( 12.96 ) 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: lars@metafoo.de, alexandre.torgue@st.com, linux-iio@vger.kernel.org, pmeerw@pmeerw.net, linux-kernel@vger.kernel.org, mcoquelin.stm32@gmail.com, knaack.h@gmx.de, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, benjamin.gaignard@st.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 19 Jun 2019 15:03:51 +0200 Olivier Moysan wrote: > Add a comment on DMA configuration for 16 bits record. > > Signed-off-by: Olivier Moysan Applied. Thanks, Jonathan > --- > drivers/iio/adc/stm32-dfsdm-adc.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c > index d855a605eab6..ee1e0569d0e1 100644 > --- a/drivers/iio/adc/stm32-dfsdm-adc.c > +++ b/drivers/iio/adc/stm32-dfsdm-adc.c > @@ -918,6 +918,11 @@ static void stm32_dfsdm_dma_buffer_done(void *data) > static int stm32_dfsdm_adc_dma_start(struct iio_dev *indio_dev) > { > struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); > + /* > + * The DFSDM supports half-word transfers. However, for 16 bits record, > + * 4 bytes buswidth is kept, to avoid losing samples LSBs when left > + * shift is required. > + */ > struct dma_slave_config config = { > .src_addr = (dma_addr_t)adc->dfsdm->phys_base, > .src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel