On 12/30/06, Richard Purdie [off-list ref] wrote:

On Wed, 2006-11-08 at 00:33 +0800, Yu Luming wrote:

quoted

This patch set adds generic abstract layer support for acpi video driver to have
generic user interface to control backlight and output switch control by leveraging
the existing backlight sysfs class driver, and by adding a new video output sysfs
class driver.

Patch 1/5:  adds dev argument for backlight_device_register to link the class device
to real device object. The platform specific driver should find a way to get the real
device object for their video device.

signed-off-by: Luming Yu <redacted>
---
 drivers/acpi/asus_acpi.c            |    2 +-
 drivers/acpi/ibm_acpi.c             |    2 +-
 drivers/acpi/toshiba_acpi.c         |    3 ++-
 drivers/video/backlight/backlight.c |    7 +++++--
 include/linux/backlight.h           |    2 +-
 5 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 27597c5..1d97cdf 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c

@@ -190,8 +190,10 @@ static int fb_notifier_callback(struct n
  * Creates and registers new backlight class_device. Returns either an
  * ERR_PTR() or a pointer to the newly allocated device.
  */
-struct backlight_device *backlight_device_register(const char *name, void *devdata,
-                                                struct backlight_properties *bp)
+struct backlight_device *backlight_device_register(const char *name,
+     struct device *dev,
+     void *devdata,
+     struct backlight_properties *bp)
 {
      int i, rc;
      struct backlight_device *new_bd;

This patch breaks several platforms. If you're going to add parameters
to a function like backlight_device_register, you could at least grep
the tree and update all the users :-(.

yes, you are right.  I just noticed that there are so many users when I sent
out that patch. And all these users were disabled when I was testing patch.
I'm sorry for that.

To top it off, someone noticed some of the failures and fixed them but
nobody thought to fix the drivers in drivers/video/backlight itself and
a mac reference seems to have escaped too.

If my memory serves me well,  there is a patch for mac in mm.
Not sure other drivers in video/backlight. But I should have sent it
to some place.
Need to check.

I'll send a patch to to Andrew to clean up this mess...

thank you!