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Subject[PATCH 5/9] video: vesafb: use sysfb bus
Date
Instead of using our own platform device, we now register as sysfb driver
and get notified whenever we are loaded on a system VBE device. This
allows other VBE drivers to be loaded at the same time and users can
bind/unbind drivers via sysfs. We also no longer need to fake a
platform-device because the sysfb bus provides all devices now.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
---
drivers/video/Kconfig | 1 +
drivers/video/vesafb.c | 49 +++++++++++++++----------------------------------
2 files changed, 16 insertions(+), 34 deletions(-)

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index d5723c2..5c23d32 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -776,6 +776,7 @@ config FB_VESA
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_BOOT_VESA_SUPPORT
+ select SYSFB
help
This is the frame buffer device driver for generic VESA 2.0
compliant graphic cards. The older VESA 1.2 cards are not supported.
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index 4ad7b40..652858f 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
+#include <linux/sysfb.h>

#include <video/vga.h>
#include <asm/io.h>
@@ -214,7 +215,7 @@ static int vesafb_setup(char *options)
return 0;
}

-static int vesafb_probe(struct platform_device *dev)
+static int vesafb_probe(struct sysfb_device *dev)
{
struct fb_info *info;
struct vesafb_par *par;
@@ -491,7 +492,7 @@ static int vesafb_probe(struct platform_device *dev)
}
printk(KERN_INFO "fb%d: %s frame buffer device\n",
info->node, info->fix.id);
- platform_set_drvdata(dev, info);
+ dev_set_drvdata(&dev->dev, info);
return 0;
err:
if (info->screen_base)
@@ -501,59 +502,39 @@ err:
return err;
}

-static int vesafb_remove(struct platform_device *dev)
+static void vesafb_remove(struct sysfb_device *dev)
{
- struct fb_info *info = platform_get_drvdata(dev);
+ struct fb_info *info = dev_get_drvdata(&dev->dev);

unregister_framebuffer(info);
- return 0;
}

-static struct platform_driver vesafb_driver = {
+static struct sysfb_driver vesafb_driver = {
+ .type_mask = SYSFB_VBE,
+ .allow_tainted = false,
+ .driver = {
+ .name = "vesafb",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ },
.probe = vesafb_probe,
.remove = vesafb_remove,
- .driver = {
- .name = "vesafb",
- },
};

-static struct platform_device *vesafb_device;
-
static int __init vesafb_init(void)
{
- int ret;
char *option = NULL;

/* ignore error return of fb_get_options */
fb_get_options("vesafb", &option);
vesafb_setup(option);

- vesafb_device = platform_device_alloc("vesafb", -1);
- if (!vesafb_device)
- return -ENOMEM;
-
- ret = platform_driver_register(&vesafb_driver);
- if (ret)
- goto err_dev;
-
- ret = platform_device_add(vesafb_device);
- if (ret)
- goto err_drv;
-
- return 0;
-
-err_drv:
- platform_driver_unregister(&vesafb_driver);
-err_dev:
- platform_device_put(vesafb_device);
- return ret;
+ return sysfb_register_driver(&vesafb_driver);
}

static void __exit vesafb_exit(void)
{
- platform_device_del(vesafb_device);
- platform_device_put(vesafb_device);
- platform_driver_unregister(&vesafb_driver);
+ sysfb_unregister_driver(&vesafb_driver);
}

module_init(vesafb_init);
--
1.8.1.3


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