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Add dev_of_fbinfo() to return the framebuffer struct device when CONFIG_FB_DEVICE is enabled, or NULL otherwise. This allows fbdev drivers to use sysfs interfaces via runtime checks instead of CONFIG_FB_DEVICE ifdefs, keeping the code clean while remaining fully buildable. Suggested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Chintan Patel <chintanlike@gmail.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Helge Deller <deller@gmx.de>