[DRIVER MODEL] Convert platform drivers to use struct platform_driver

This allows us to eliminate the casts in the drivers, and eventually
remove the use of the device_driver function pointer methods for
platform device drivers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 22 insertions, 23 deletions

diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index e20b9f3..5924cc2 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -423,18 +423,18 @@ static void imxfb_setup_gpio(struct imxfb_info *fbi)
  * Power management hooks.  Note that we won't be called from IRQ context,
  * unlike the blank functions above, so we may sleep.
  */
-static int imxfb_suspend(struct device *dev, pm_message_t state)
+static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
 {
-	struct imxfb_info *fbi = dev_get_drvdata(dev);
+	struct imxfb_info *fbi = platform_get_drvdata(dev);
 	pr_debug("%s\n",__FUNCTION__);
 
 	imxfb_disable_controller(fbi);
 	return 0;
 }
 
-static int imxfb_resume(struct device *dev)
+static int imxfb_resume(struct platform_device *dev)
 {
-	struct imxfb_info *fbi = dev_get_drvdata(dev);
+	struct imxfb_info *fbi = platform_get_drvdata(dev);
 	pr_debug("%s\n",__FUNCTION__);
 
 	imxfb_enable_controller(fbi);
@@ -538,9 +538,8 @@ static int __init imxfb_map_video_memory(struct fb_info *info)
 	return fbi->map_cpu ? 0 : -ENOMEM;
 }
 
-static int __init imxfb_probe(struct device *dev)
+static int __init imxfb_probe(struct platform_device *pdev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
 	struct imxfb_info *fbi;
 	struct fb_info *info;
 	struct imxfb_mach_info *inf;
@@ -553,21 +552,21 @@ static int __init imxfb_probe(struct device *dev)
 	if(!res)
 		return -ENODEV;
 
-	inf = dev->platform_data;
+	inf = pdev->dev.platform_data;
 	if(!inf) {
 		dev_err(dev,"No platform_data available\n");
 		return -ENOMEM;
 	}
 
-	info = framebuffer_alloc(sizeof(struct imxfb_info), dev);
+	info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
 	if(!info)
 		return -ENOMEM;
 
 	fbi = info->par;
 
-	dev_set_drvdata(dev, info);
+	platform_set_drvdata(pdev, info);
 
-	ret = imxfb_init_fbinfo(dev);
+	ret = imxfb_init_fbinfo(&pdev->dev);
 	if( ret < 0 )
 		goto failed_init;
 
@@ -621,22 +620,21 @@ failed_register:
 	fb_dealloc_cmap(&info->cmap);
 failed_cmap:
 	if (!inf->fixed_screen_cpu)
-		dma_free_writecombine(dev,fbi->map_size,fbi->map_cpu,
+		dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
 		           fbi->map_dma);
 failed_map:
 	kfree(info->pseudo_palette);
 failed_regs:
 	release_mem_region(res->start, res->end - res->start);
 failed_init:
-	dev_set_drvdata(dev, NULL);
+	platform_set_drvdata(pdev, NULL);
 	framebuffer_release(info);
 	return ret;
 }
 
-static int imxfb_remove(struct device *dev)
+static int imxfb_remove(struct platform_device *pdev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct fb_info *info = dev_get_drvdata(dev);
+	struct fb_info *info = platform_get_drvdata(pdev);
 	struct imxfb_info *fbi = info->par;
 	struct resource *res;
 
@@ -651,36 +649,37 @@ static int imxfb_remove(struct device *dev)
 	framebuffer_release(info);
 
 	release_mem_region(res->start, res->end - res->start + 1);
-	dev_set_drvdata(dev, NULL);
+	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }
 
-void  imxfb_shutdown(struct device * dev)
+void  imxfb_shutdown(struct platform_device * dev)
 {
-	struct fb_info *info = dev_get_drvdata(dev);
+	struct fb_info *info = platform_get_drvdata(dev);
 	struct imxfb_info *fbi = info->par;
 	imxfb_disable_controller(fbi);
 }
 
-static struct device_driver imxfb_driver = {
-	.name		= "imx-fb",
-	.bus		= &platform_bus_type,
+static struct platform_driver imxfb_driver = {
 	.probe		= imxfb_probe,
 	.suspend	= imxfb_suspend,
 	.resume		= imxfb_resume,
 	.remove		= imxfb_remove,
 	.shutdown	= imxfb_shutdown,
+	.driver		= {
+		.name	= "imx-fb",
+	},
 };
 
 int __init imxfb_init(void)
 {
-	return driver_register(&imxfb_driver);
+	return platform_driver_register(&imxfb_driver);
 }
 
 static void __exit imxfb_cleanup(void)
 {
-	driver_unregister(&imxfb_driver);
+	platform_driver_unregister(&imxfb_driver);
 }
 
 module_init(imxfb_init);