From 8928b6d1568eb9104cc9e2e6627d7086437b2fb3 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 20 Sep 2012 02:45:39 -0300 Subject: [PATCH] [media] media: mx2_camera: use managed functions to clean up code 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 Signed-off-by: Mauro Carvalho Chehab --- .../media/platform/soc_camera/mx2_camera.c | 149 ++++++------------ 1 file changed, 45 insertions(+), 104 deletions(-) diff --git a/drivers/media/platform/soc_camera/mx2_camera.c b/drivers/media/platform/soc_camera/mx2_camera.c index 7c67fbc6c0cf..619df35de3da 100644 --- a/drivers/media/platform/soc_camera/mx2_camera.c +++ b/drivers/media/platform/soc_camera/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; @@ -1647,64 +1644,59 @@ 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; } @@ -1712,9 +1704,8 @@ 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"); @@ -1727,21 +1718,20 @@ 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; @@ -1751,11 +1741,11 @@ 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); @@ -1763,50 +1753,36 @@ 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; @@ -1833,25 +1809,9 @@ 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; } @@ -1861,35 +1821,16 @@ 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; -- 2.30.2