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Thu, 22 Oct 2015 20:05:34 +0000 Received: from chopperman.am.freescale.net (chopperman.am.freescale.net [10.81.16.64]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id t9MK5Wo4004789; Thu, 22 Oct 2015 13:05:34 -0700 From: Han Xu To: Subject: [PATCH v6 3/7] dmaengine: mxs: add i.MX7D APBH DMA support Date: Thu, 22 Oct 2015 14:54:32 -0500 Message-ID: <1445543676-19876-4-git-send-email-b45815@freescale.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1445543676-19876-1-git-send-email-b45815@freescale.com> References: <1445543676-19876-1-git-send-email-b45815@freescale.com> X-EOPAttributedMessage: 0 X-Microsoft-Exchange-Diagnostics: 1; BN1BFFO11FD054; 1:6b0m/5zRVqPiQV0m5dC7noiUmrSxyxKREPiUKZXGoL/b7o8NrN8qL4Qw6Drb6ayeFVDT11wjtcFi+nGqIjpgmh4R2IFd6GRdTfafC6lxjDmotPZy4xUq1H3aR+N5mqbqVxVPxN2RuLtMmuyYlnPsoFEQE1OdlysNzaam63x9vjceoTMLJN3gQXtF/kWERMSeYo3itb9ni7aaqadCeQhIbGWIfhsbmiIUKylgFR449v2PDWIQj2zn8fOjmMC7vV7HKzJBjOzIJQuQGjrHa5WrvlMsBcSjac6LtWTddOQedSt/LHef+PViyxXCchsvCNgwsjMHiD4Nmqr2vCs+OvAihDdFwA+TB7zlkMvXL1SFIbpH8wcTUdxSenN0e/NAf6qwgAHuVtmIBL8We6ac8+Cedw== X-Forefront-Antispam-Report: CIP:192.88.168.50; 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BY1PR0301MB1302; 5:0UPnVCEYSdGDgNoEXJk/BCsBbaerSuKKyTXY/QjVcitcQ02eu+VJOGj9P4ax4HET5ZA9k/kb9T3dYxm48NZfJbey/3zxHFDSpKawJ/42k0RdM4OFzefUaKJsMoqL3JNLFe3DbPBnOWXpqzaz1pFUgA==; 24:28I9OZKrYUX+42T9VSB/A9lfeVZitYCb8dK79paeGsygLh9BPfQIH3yNhpLxH7oeKL7JBPG8ierFziAyKs/DcM+ftA5MWMrNg74m1T2YnJw=; 20:rCxB1W5j/sSO/pJh0bsEXPD7GwUC5vIks415+TG9wUctoUfzWxmaJ3MBuHeARM9hYxPw3uRgKxyTPEuxCs71EA== X-OriginatorOrg: freescale.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2015 20:05:34.8969 (UTC) X-MS-Exchange-CrossTenant-Id: 710a03f5-10f6-4d38-9ff4-a80b81da590d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=710a03f5-10f6-4d38-9ff4-a80b81da590d; Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY1PR0301MB1302 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151022_130559_705120_08D16B2A X-CRM114-Status: GOOD ( 21.93 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.55.169.116 listed in list.dnswl.org] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [65.55.169.116 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fabio.estevam@freescale.com, boris.brezillon@free-electrons.com, vinod.koul@intel.com, linux-kernel@vger.kernel.org, b45815@freescale.com, linux-mtd@lists.infradead.org, hofrat@osadl.org, dmaengine@vger.kernel.org, dan.j.williams@intel.com, computersforpeace@gmail.com, dwmw2@infradead.org Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Adrian Alonso supports APBH DMA on i.MX7D by add extra clock clk_io Signed-off-by: Fugang Duan Signed-off-by: Adrian Alonso Signed-off-by: Han Xu --- drivers/dma/mxs-dma.c | 53 ++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 46 insertions(+), 7 deletions(-) diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c index 7e5800a..72ce1ef 100644 --- a/drivers/dma/mxs-dma.c +++ b/drivers/dma/mxs-dma.c @@ -1,5 +1,5 @@ /* - * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2011-2015 Freescale Semiconductor, Inc. All Rights Reserved. * * Refer to drivers/dma/imx-sdma.c * @@ -28,7 +28,6 @@ #include #include #include - #include #include "dmaengine.h" @@ -135,6 +134,7 @@ enum mxs_dma_devtype { enum mxs_dma_id { IMX23_DMA, IMX28_DMA, + IMX7D_DMA, }; struct mxs_dma_engine { @@ -142,6 +142,7 @@ struct mxs_dma_engine { enum mxs_dma_devtype type; void __iomem *base; struct clk *clk; + struct clk *clk_io; struct dma_device dma_device; struct device_dma_parameters dma_parms; struct mxs_dma_chan mxs_chans[MXS_DMA_CHANNELS]; @@ -167,6 +168,9 @@ static struct mxs_dma_type mxs_dma_types[] = { }, { .id = IMX28_DMA, .type = MXS_DMA_APBX, + }, { + .id = IMX7D_DMA, + .type = MXS_DMA_APBH, } }; @@ -184,6 +188,9 @@ static const struct platform_device_id mxs_dma_ids[] = { .name = "imx28-dma-apbx", .driver_data = (kernel_ulong_t) &mxs_dma_types[3], }, { + .name = "imx7d-dma-apbh", + .driver_data = (kernel_ulong_t) &mxs_dma_types[4], + }, { /* end of list */ } }; @@ -193,6 +200,7 @@ static const struct of_device_id mxs_dma_dt_ids[] = { { .compatible = "fsl,imx23-dma-apbx", .data = &mxs_dma_ids[1], }, { .compatible = "fsl,imx28-dma-apbh", .data = &mxs_dma_ids[2], }, { .compatible = "fsl,imx28-dma-apbx", .data = &mxs_dma_ids[3], }, + { .compatible = "fsl,imx7d-dma-apbh", .data = &mxs_dma_ids[4], }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mxs_dma_dt_ids); @@ -440,6 +448,13 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan) if (ret) goto err_clk; + /* enable the extra clk_io clock for i.MX7D */ + if (mxs_dma->dev_id == IMX7D_DMA) { + ret = clk_prepare_enable(mxs_dma->clk_io); + if (ret) + goto err_clk_unprepare; + } + mxs_dma_reset_chan(chan); dma_async_tx_descriptor_init(&mxs_chan->desc, chan); @@ -450,6 +465,8 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan) return 0; +err_clk_unprepare: + clk_disable_unprepare(mxs_dma->clk); err_clk: free_irq(mxs_chan->chan_irq, mxs_dma); err_irq: @@ -471,6 +488,9 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan) dma_free_coherent(mxs_dma->dma_device.dev, CCW_BLOCK_SIZE, mxs_chan->ccw, mxs_chan->ccw_phys); + if (mxs_dma->dev_id == IMX7D_DMA) + clk_disable_unprepare(mxs_dma->clk_io); + clk_disable_unprepare(mxs_dma->clk); } @@ -701,9 +721,15 @@ static int mxs_dma_init(struct mxs_dma_engine *mxs_dma) if (ret) return ret; + if (mxs_dma->dev_id == IMX7D_DMA) { + ret = clk_prepare_enable(mxs_dma->clk_io); + if (ret) + goto err_clk_bch; + } + ret = stmp_reset_block(mxs_dma->base); if (ret) - goto err_out; + goto err_clk_io; /* enable apbh burst */ if (dma_is_apbh(mxs_dma)) { @@ -717,7 +743,10 @@ static int mxs_dma_init(struct mxs_dma_engine *mxs_dma) writel(MXS_DMA_CHANNELS_MASK << MXS_DMA_CHANNELS, mxs_dma->base + HW_APBHX_CTRL1 + STMP_OFFSET_REG_SET); -err_out: +err_clk_io: + if (mxs_dma->dev_id == IMX7D_DMA) + clk_disable_unprepare(mxs_dma->clk_io); +err_clk_bch: clk_disable_unprepare(mxs_dma->clk); return ret; } @@ -803,9 +832,19 @@ static int __init mxs_dma_probe(struct platform_device *pdev) if (IS_ERR(mxs_dma->base)) return PTR_ERR(mxs_dma->base); - mxs_dma->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(mxs_dma->clk)) - return PTR_ERR(mxs_dma->clk); + if (mxs_dma->dev_id == IMX7D_DMA) { + mxs_dma->clk = devm_clk_get(&pdev->dev, "dma_apbh_bch"); + if (IS_ERR(mxs_dma->clk)) + return PTR_ERR(mxs_dma->clk); + mxs_dma->clk_io = devm_clk_get(&pdev->dev, "dma_apbh_io"); + if (IS_ERR(mxs_dma->clk_io)) + return PTR_ERR(mxs_dma->clk_io); + + } else { + mxs_dma->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(mxs_dma->clk)) + return PTR_ERR(mxs_dma->clk); + } dma_cap_set(DMA_SLAVE, mxs_dma->dma_device.cap_mask); dma_cap_set(DMA_CYCLIC, mxs_dma->dma_device.cap_mask);