[PATCH v2 26/34] media: mx2_camera: use managed functions to clean up code
Shawn Guo
shawn.guo at linaro.org
Thu Sep 20 02:45:39 EDT 2012
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 <shawn.guo at linaro.org>
Acked-by: Sascha Hauer <s.hauer at pengutronix.de>
Acked-by: Arnd Bergmann <arnd at arndb.de>
Acked-by: Guennadi Liakhovetski <g.liakhovetski at gmx.de>
Tested-by: Javier Martin <javier.martin at vista-silicon.com>
Cc: linux-media at 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;
--
1.7.9.5
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