[PATCH 09/46] fbdev/cirrusfb: Initialize fb_ops to fbdev I/O-memory helpers

[Thomas Zimmermann]

Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/video/fbdev/Kconfig    | 1 +
 drivers/video/fbdev/cirrusfb.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 83e2f341cf911..06d20787da8b8 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -74,6 +74,7 @@ config FB_CIRRUS
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
+	select FB_IOMEM_FOPS
 	select VIDEO_NOMODESET
 	help
 	  This enables support for Cirrus Logic GD542x/543x based boards on
diff --git a/drivers/video/fbdev/cirrusfb.c b/drivers/video/fbdev/cirrusfb.c
index 9d369b6a4dcc7..e29217e476ea4 100644
--- a/drivers/video/fbdev/cirrusfb.c
+++ b/drivers/video/fbdev/cirrusfb.c
@@ -1961,6 +1961,7 @@ static const struct fb_ops cirrusfb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_open	= cirrusfb_open,
 	.fb_release	= cirrusfb_release,
+	__FB_DEFAULT_IOMEM_OPS_RDWR,
 	.fb_setcolreg	= cirrusfb_setcolreg,
 	.fb_check_var	= cirrusfb_check_var,
 	.fb_set_par	= cirrusfb_set_par,
@@ -1970,6 +1971,7 @@ static const struct fb_ops cirrusfb_ops = {
 	.fb_copyarea	= cirrusfb_copyarea,
 	.fb_sync	= cirrusfb_sync,
 	.fb_imageblit	= cirrusfb_imageblit,
+	__FB_DEFAULT_IOMEM_OPS_MMAP,
 };
 
 static int cirrusfb_set_fbinfo(struct fb_info *info)
-- 
2.42.0