From patchwork Thu Sep 20 06:45:39 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 1482621 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 227F13FD40 for ; Thu, 20 Sep 2012 06:47:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753023Ab2ITGrm (ORCPT ); Thu, 20 Sep 2012 02:47:42 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:49998 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752991Ab2ITGrl (ORCPT ); Thu, 20 Sep 2012 02:47:41 -0400 Received: by mail-pb0-f46.google.com with SMTP id rr13so4370522pbb.19 for ; Wed, 19 Sep 2012 23:47:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=PtRNDNjxD0UdqmcQdHkgEofqCa2XxkCkkeSg/CXcMOQ=; b=Ao7dZJd7zaez4+4J7WT2hIlGW7WqJ8ZCET65dDaPLtt00HOjdl/qWaWL9uunrzMtBT 9/lS39NXBGBPhEBYaO4tKHkSpl699gbEcqVSoKk0UvYVJzgLoKcThZVhgAiIVbW++czc VbaI9bKvmeItbhfEX3QK0zFieul2xCFL4vkeUEPFPrEVo3ypSkEWjGQ6xZzE5ZOPLRpW kqAtrWuOyBS/dP4posw9DUCL0CSe/YcNHTwdShp7KMqCYhbyjXojUo36Lh6LbJVSGKkj hPLFTLTUpAfElu965froXhRcwVa1MOlKkP8FxAuB6Xx/0F0LU3UCtWlAm8Gabygf0Dgm u1iA== Received: by 10.66.72.132 with SMTP id d4mr2888844pav.61.1348123661345; Wed, 19 Sep 2012 23:47:41 -0700 (PDT) Received: from S2101-09.ap.freescale.net ([114.216.234.161]) by mx.google.com with ESMTPS id wn1sm3057024pbc.57.2012.09.19.23.47.38 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 19 Sep 2012 23:47:40 -0700 (PDT) From: Shawn Guo To: linux-arm-kernel@lists.infradead.org Cc: Sascha Hauer , Javier Martin , Rob Herring , Arnd Bergmann , Shawn Guo , linux-media@vger.kernel.org Subject: [PATCH v2 26/34] media: mx2_camera: use managed functions to clean up code Date: Thu, 20 Sep 2012 14:45:39 +0800 Message-Id: <1348123547-31082-27-git-send-email-shawn.guo@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348123547-31082-1-git-send-email-shawn.guo@linaro.org> References: <1348123547-31082-1-git-send-email-shawn.guo@linaro.org> X-Gm-Message-State: ALoCoQmsXV2MqAHE7eJG4qu6nx0D2PmntmaPu9S2g7Fp7mirZQLaqp6ZxBUhfd2jgFPChkNJVG78 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Use managed functions to clean up the error handling code and function mx2_camera_remove(). Along with the change, a few variables get removed from struct mx2_camera_dev. Signed-off-by: Shawn Guo Acked-by: Sascha Hauer Acked-by: Arnd Bergmann Acked-by: Guennadi Liakhovetski Tested-by: Javier Martin Cc: linux-media@vger.kernel.org --- drivers/media/video/mx2_camera.c | 149 ++++++++++++-------------------------- 1 file changed, 45 insertions(+), 104 deletions(-) diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c index 89c7e28..9bb9e8c 100644 --- a/drivers/media/video/mx2_camera.c +++ b/drivers/media/video/mx2_camera.c @@ -274,12 +274,9 @@ struct mx2_camera_dev { struct soc_camera_device *icd; struct clk *clk_csi, *clk_emma_ahb, *clk_emma_ipg; - unsigned int irq_csi, irq_emma; void __iomem *base_csi, *base_emma; - unsigned long base_dma; struct mx2_camera_platform_data *pdata; - struct resource *res_csi, *res_emma; unsigned long platform_flags; struct list_head capture; @@ -1607,64 +1604,59 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) return IRQ_HANDLED; } -static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev) +static int __devinit mx27_camera_emma_init(struct platform_device *pdev) { - struct resource *res_emma = pcdev->res_emma; + struct mx2_camera_dev *pcdev = platform_get_drvdata(pdev); + struct resource *res_emma; + int irq_emma; int err = 0; - if (!request_mem_region(res_emma->start, resource_size(res_emma), - MX2_CAM_DRV_NAME)) { - err = -EBUSY; + res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1); + irq_emma = platform_get_irq(pdev, 1); + if (!res_emma || !irq_emma) { + dev_err(pcdev->dev, "no EMMA resources\n"); goto out; } - pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma)); + pcdev->base_emma = devm_request_and_ioremap(pcdev->dev, res_emma); if (!pcdev->base_emma) { - err = -ENOMEM; - goto exit_release; + err = -EADDRNOTAVAIL; + goto out; } - err = request_irq(pcdev->irq_emma, mx27_camera_emma_irq, 0, - MX2_CAM_DRV_NAME, pcdev); + err = devm_request_irq(pcdev->dev, irq_emma, mx27_camera_emma_irq, 0, + MX2_CAM_DRV_NAME, pcdev); if (err) { dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n"); - goto exit_iounmap; + goto out; } - pcdev->clk_emma_ipg = clk_get(pcdev->dev, "emma-ipg"); + pcdev->clk_emma_ipg = devm_clk_get(pcdev->dev, "emma-ipg"); if (IS_ERR(pcdev->clk_emma_ipg)) { err = PTR_ERR(pcdev->clk_emma_ipg); - goto exit_free_irq; + goto out; } clk_prepare_enable(pcdev->clk_emma_ipg); - pcdev->clk_emma_ahb = clk_get(pcdev->dev, "emma-ahb"); + pcdev->clk_emma_ahb = devm_clk_get(pcdev->dev, "emma-ahb"); if (IS_ERR(pcdev->clk_emma_ahb)) { err = PTR_ERR(pcdev->clk_emma_ahb); - goto exit_clk_emma_ipg_put; + goto exit_clk_emma_ipg; } clk_prepare_enable(pcdev->clk_emma_ahb); err = mx27_camera_emma_prp_reset(pcdev); if (err) - goto exit_clk_emma_ahb_put; + goto exit_clk_emma_ahb; return err; -exit_clk_emma_ahb_put: +exit_clk_emma_ahb: clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); -exit_clk_emma_ipg_put: +exit_clk_emma_ipg: clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); -exit_free_irq: - free_irq(pcdev->irq_emma, pcdev); -exit_iounmap: - iounmap(pcdev->base_emma); -exit_release: - release_mem_region(res_emma->start, resource_size(res_emma)); out: return err; } @@ -1672,9 +1664,8 @@ out: static int __devinit mx2_camera_probe(struct platform_device *pdev) { struct mx2_camera_dev *pcdev; - struct resource *res_csi, *res_emma; - void __iomem *base_csi; - int irq_csi, irq_emma; + struct resource *res_csi; + int irq_csi; int err = 0; dev_dbg(&pdev->dev, "initialising\n"); @@ -1687,21 +1678,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev) goto exit; } - pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); + pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL); if (!pcdev) { dev_err(&pdev->dev, "Could not allocate pcdev\n"); err = -ENOMEM; goto exit; } - pcdev->clk_csi = clk_get(&pdev->dev, "ahb"); + pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb"); if (IS_ERR(pcdev->clk_csi)) { dev_err(&pdev->dev, "Could not get csi clock\n"); err = PTR_ERR(pcdev->clk_csi); - goto exit_kfree; + goto exit; } - pcdev->res_csi = res_csi; pcdev->pdata = pdev->dev.platform_data; if (pcdev->pdata) { long rate; @@ -1711,11 +1701,11 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev) rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2); if (rate <= 0) { err = -ENODEV; - goto exit_dma_free; + goto exit; } err = clk_set_rate(pcdev->clk_csi, rate); if (err < 0) - goto exit_dma_free; + goto exit; } INIT_LIST_HEAD(&pcdev->capture); @@ -1723,50 +1713,36 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev) INIT_LIST_HEAD(&pcdev->discard); spin_lock_init(&pcdev->lock); - /* - * Request the regions. - */ - if (!request_mem_region(res_csi->start, resource_size(res_csi), - MX2_CAM_DRV_NAME)) { - err = -EBUSY; - goto exit_dma_free; + pcdev->base_csi = devm_request_and_ioremap(&pdev->dev, res_csi); + if (!pcdev->base_csi) { + err = -EADDRNOTAVAIL; + goto exit; } - base_csi = ioremap(res_csi->start, resource_size(res_csi)); - if (!base_csi) { - err = -ENOMEM; - goto exit_release; - } - pcdev->irq_csi = irq_csi; - pcdev->base_csi = base_csi; - pcdev->base_dma = res_csi->start; pcdev->dev = &pdev->dev; + platform_set_drvdata(pdev, pcdev); if (cpu_is_mx25()) { - err = request_irq(pcdev->irq_csi, mx25_camera_irq, 0, - MX2_CAM_DRV_NAME, pcdev); + err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0, + MX2_CAM_DRV_NAME, pcdev); if (err) { dev_err(pcdev->dev, "Camera interrupt register failed \n"); - goto exit_iounmap; + goto exit; } } if (cpu_is_mx27()) { - /* EMMA support */ - res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1); - irq_emma = platform_get_irq(pdev, 1); - - if (!res_emma || !irq_emma) { - dev_err(&pdev->dev, "no EMMA resources\n"); - goto exit_free_irq; - } - - pcdev->res_emma = res_emma; - pcdev->irq_emma = irq_emma; - if (mx27_camera_emma_init(pcdev)) - goto exit_free_irq; + err = mx27_camera_emma_init(pdev); + if (err) + goto exit; } + /* + * We're done with drvdata here. Clear the pointer so that + * v4l2 core can start using drvdata on its purpose. + */ + platform_set_drvdata(pdev, NULL); + pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME, pcdev->soc_host.ops = &mx2_soc_camera_host_ops, pcdev->soc_host.priv = pcdev; @@ -1793,25 +1769,9 @@ exit_free_emma: vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); eallocctx: if (cpu_is_mx27()) { - free_irq(pcdev->irq_emma, pcdev); clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); - iounmap(pcdev->base_emma); - release_mem_region(pcdev->res_emma->start, resource_size(pcdev->res_emma)); } -exit_free_irq: - if (cpu_is_mx25()) - free_irq(pcdev->irq_csi, pcdev); -exit_iounmap: - iounmap(base_csi); -exit_release: - release_mem_region(res_csi->start, resource_size(res_csi)); -exit_dma_free: - clk_put(pcdev->clk_csi); -exit_kfree: - kfree(pcdev); exit: return err; } @@ -1821,35 +1781,16 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev) struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); struct mx2_camera_dev *pcdev = container_of(soc_host, struct mx2_camera_dev, soc_host); - struct resource *res; - - clk_put(pcdev->clk_csi); - if (cpu_is_mx25()) - free_irq(pcdev->irq_csi, pcdev); - if (cpu_is_mx27()) - free_irq(pcdev->irq_emma, pcdev); soc_camera_host_unregister(&pcdev->soc_host); vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); - iounmap(pcdev->base_csi); - if (cpu_is_mx27()) { clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); - iounmap(pcdev->base_emma); - res = pcdev->res_emma; - release_mem_region(res->start, resource_size(res)); } - res = pcdev->res_csi; - release_mem_region(res->start, resource_size(res)); - - kfree(pcdev); - dev_info(&pdev->dev, "MX2 Camera driver unloaded\n"); return 0;