From patchwork Thu Aug 28 06:56:52 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4800071 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1192AC0338 for ; Thu, 28 Aug 2014 08:41:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2D77720145 for ; Thu, 28 Aug 2014 08:41:06 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 39EF22012E for ; Thu, 28 Aug 2014 08:41:05 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 1B5F21604; Thu, 28 Aug 2014 07:35:34 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 35FD51503 for ; Thu, 28 Aug 2014 07:35:07 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id B663B1F88A for ; Thu, 28 Aug 2014 07:35:06 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id E1053267266; Thu, 28 Aug 2014 17:08:07 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 6BE7EEDEAE6; Thu, 28 Aug 2014 16:08:05 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 15:56:52 +0900 Message-Id: <1409209620-24487-287-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 286/894] spi: rspi: Pass sg_tables instead of spi_tranfer to rspi_*_dma() X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Geert Uytterhoeven The DMA routines only need access to the scatter-gather tables inside the spi_transfer structures, hence just pass those. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown (cherry picked from commit e4b52dc4625ee739195189d40c6ddc7d55ddf312) Signed-off-by: Simon Horman --- drivers/spi/spi-rspi.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 3dea8ad..bfa5e7e 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -463,13 +463,13 @@ static void rspi_dma_complete(void *arg) wake_up_interruptible(&rspi->wait); } -static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t) +static int rspi_send_dma(struct rspi_data *rspi, struct sg_table *tx) { struct dma_async_tx_descriptor *desc; int ret; - desc = dmaengine_prep_slave_sg(rspi->master->dma_tx, t->tx_sg.sgl, - t->tx_sg.nents, DMA_TO_DEVICE, + desc = dmaengine_prep_slave_sg(rspi->master->dma_tx, tx->sgl, + tx->nents, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc) return -EIO; @@ -530,21 +530,22 @@ static void qspi_receive_init(const struct rspi_data *rspi) rspi_write8(rspi, 0, QSPI_SPBFCR); } -static int rspi_send_receive_dma(struct rspi_data *rspi, struct spi_transfer *t) +static int rspi_send_receive_dma(struct rspi_data *rspi, struct sg_table *tx, + struct sg_table *rx) { struct dma_async_tx_descriptor *desc_tx, *desc_rx; int ret; /* prepare transmit transfer */ - desc_tx = dmaengine_prep_slave_sg(rspi->master->dma_tx, t->tx_sg.sgl, - t->tx_sg.nents, DMA_TO_DEVICE, + desc_tx = dmaengine_prep_slave_sg(rspi->master->dma_tx, tx->sgl, + tx->nents, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc_tx) return -EIO; /* prepare receive transfer */ - desc_rx = dmaengine_prep_slave_sg(rspi->master->dma_rx, t->rx_sg.sgl, - t->rx_sg.nents, DMA_FROM_DEVICE, + desc_rx = dmaengine_prep_slave_sg(rspi->master->dma_rx, rx->sgl, + rx->nents, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc_rx) return -EIO; @@ -616,9 +617,10 @@ static int rspi_transfer_one(struct spi_master *master, struct spi_device *spi, if (master->can_dma && __rspi_can_dma(rspi, xfer)) { if (xfer->rx_buf) - return rspi_send_receive_dma(rspi, xfer); + return rspi_send_receive_dma(rspi, &xfer->tx_sg, + &xfer->rx_sg); else - return rspi_send_dma(rspi, xfer); + return rspi_send_dma(rspi, &xfer->tx_sg); } ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);