From patchwork Tue Mar 5 20:53:13 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Porter X-Patchwork-Id: 2221671 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 64C21DF24C for ; Tue, 5 Mar 2013 20:54:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759242Ab3CEUyP (ORCPT ); Tue, 5 Mar 2013 15:54:15 -0500 Received: from mail-ia0-f182.google.com ([209.85.210.182]:37415 "EHLO mail-ia0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757898Ab3CEUxF (ORCPT ); Tue, 5 Mar 2013 15:53:05 -0500 Received: by mail-ia0-f182.google.com with SMTP id w21so321410iac.13 for ; Tue, 05 Mar 2013 12:53:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:sender:from:to:cc:subject:date:message-id:x-mailer :in-reply-to:references; bh=QNa2L/WqkWGBVcXdcUQQqaygVpK7+K0Sfm7dk7bEcWc=; b=bhSiN3VPOKlJTe/ISa8onTPJAWvgnR2L0Yk87Y75L1BivyB48thNTv7W1tskJOvfzw /zPU9OKXX4vk6Yem/Y7Ed9PcDKgEfVC+HD1aNGrkxi4fZm3f8kwoyeWPHb3OnZTX9Y/5 Tbd6q/eg984jca3GF1v9lUS58QtMJBi+t1nzhDWrtXp7IyCLEfT1wETmnYy5h+s5haAH JUVHG7tKIknbhEHiSa7TJl6TPKMJ0P94zBgF70a62DLCq1lWwfTLQCjacmXcQpqmCYGQ FgXLQ6wxwWP84JJJiiGSgSqLsymp9MjszVicA9Cipr15tmoYzlwwy+zVhkF/Hu24V2z9 I+SQ== X-Received: by 10.42.30.132 with SMTP id v4mr28215665icc.34.1362516784245; Tue, 05 Mar 2013 12:53:04 -0800 (PST) Received: from beef.ohporter.com (cpe-98-27-254-98.neo.res.rr.com. [98.27.254.98]) by mx.google.com with ESMTPS id gy3sm19430914igc.10.2013.03.05.12.53.02 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 05 Mar 2013 12:53:03 -0800 (PST) From: Matt Porter To: Tony Lindgren , Sekhar Nori , Grant Likely , Mark Brown , Benoit Cousson , Russell King , Rob Landley Cc: Devicetree Discuss , Linux OMAP List , Linux ARM Kernel List , Linux DaVinci Kernel List , Linux Kernel Mailing List , Linux Documentation List , Linux MMC List , Linux SPI Devel List , Arnd Bergmann , Rob Herring Subject: [PATCH v8 7/9] spi: omap2-mcspi: convert to dma_request_slave_channel_compat() Date: Tue, 5 Mar 2013 15:53:13 -0500 Message-Id: <1362516795-6346-8-git-send-email-mporter@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1362516795-6346-1-git-send-email-mporter@ti.com> References: <1362516795-6346-1-git-send-email-mporter@ti.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Convert dmaengine channel requests to use dma_request_slave_channel_compat(). This supports the DT case of platforms requiring channel selection from either the OMAP DMA or the EDMA engine. AM33xx only boots from DT and is the only user implementing EDMA so in the !DT case we can default to the OMAP DMA filter. Signed-off-by: Matt Porter Acked-by: Mark Brown --- drivers/spi/spi-omap2-mcspi.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 893c3d7..38d0915 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -102,6 +102,9 @@ struct omap2_mcspi_dma { struct completion dma_tx_completion; struct completion dma_rx_completion; + + char dma_rx_ch_name[14]; + char dma_tx_ch_name[14]; }; /* use PIO for small transfers, avoiding DMA setup/teardown overhead and @@ -822,14 +825,23 @@ static int omap2_mcspi_request_dma(struct spi_device *spi) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); sig = mcspi_dma->dma_rx_sync_dev; - mcspi_dma->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig); + + mcspi_dma->dma_rx = + dma_request_slave_channel_compat(mask, omap_dma_filter_fn, + &sig, &master->dev, + mcspi_dma->dma_rx_ch_name); + if (!mcspi_dma->dma_rx) { dev_err(&spi->dev, "no RX DMA engine channel for McSPI\n"); return -EAGAIN; } sig = mcspi_dma->dma_tx_sync_dev; - mcspi_dma->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig); + mcspi_dma->dma_tx = + dma_request_slave_channel_compat(mask, omap_dma_filter_fn, + &sig, &master->dev, + mcspi_dma->dma_tx_ch_name); + if (!mcspi_dma->dma_tx) { dev_err(&spi->dev, "no TX DMA engine channel for McSPI\n"); dma_release_channel(mcspi_dma->dma_rx); @@ -1240,12 +1252,13 @@ static int omap2_mcspi_probe(struct platform_device *pdev) goto free_master; for (i = 0; i < master->num_chipselect; i++) { - char dma_ch_name[14]; + char *dma_rx_ch_name = mcspi->dma_channels[i].dma_rx_ch_name; + char *dma_tx_ch_name = mcspi->dma_channels[i].dma_tx_ch_name; struct resource *dma_res; - sprintf(dma_ch_name, "rx%d", i); + sprintf(dma_rx_ch_name, "rx%d", i); dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA, - dma_ch_name); + dma_rx_ch_name); if (!dma_res) { dev_dbg(&pdev->dev, "cannot get DMA RX channel\n"); status = -ENODEV; @@ -1253,9 +1266,9 @@ static int omap2_mcspi_probe(struct platform_device *pdev) } mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start; - sprintf(dma_ch_name, "tx%d", i); + sprintf(dma_tx_ch_name, "tx%d", i); dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA, - dma_ch_name); + dma_tx_ch_name); if (!dma_res) { dev_dbg(&pdev->dev, "cannot get DMA TX channel\n"); status = -ENODEV;