BACKLIGHT_CLASS_DEVICE is already tristate, but a dependency
FB_BACKLIGHT prevents it from being built as a module. There
doesn't seem to be any particularly good reason for this, so
switch FB_BACKLIGHT over to tristate.
Signed-off-by: Rob Clark <robdcl...@gmail.com>
Tested-by: Arnd Bergmann <a...@arndb.de>
---
v2: remove IS_ENABLED() from UABI headers. Userspace doesn't
know the kernel config, so just remove the ifdef guard
drivers/video/fbdev/Kconfig | 2 +-
drivers/video/fbdev/core/fbsysfs.c | 8 ++++----
include/linux/fb.h | 2 +-
include/uapi/linux/fb.h | 2 --
4 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 591a13a59787..146ab2c347f8 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -198,7 +198,7 @@ config FB_MACMODES
default n
config FB_BACKLIGHT
- bool
+ tristate
depends on FB
select BACKLIGHT_LCD_SUPPORT
select BACKLIGHT_CLASS_DEVICE
diff --git a/drivers/video/fbdev/core/fbsysfs.c
b/drivers/video/fbdev/core/fbsysfs.c
index e31a182b42bf..44cca39f2b51 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -60,7 +60,7 @@ struct fb_info *framebuffer_alloc(size_t size, struct device
*dev)
info->device = dev;
info->fbcon_rotate_hint = -1;
-#ifdef CONFIG_FB_BACKLIGHT
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
mutex_init(&info->bl_curve_mutex);
#endif
@@ -429,7 +429,7 @@ static ssize_t show_fbstate(struct device *device,
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
}
-#ifdef CONFIG_FB_BACKLIGHT
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
static ssize_t store_bl_curve(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
@@ -510,7 +510,7 @@ static struct device_attribute device_attrs[] = {
__ATTR(stride, S_IRUGO, show_stride, NULL),
__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
__ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
-#ifdef CONFIG_FB_BACKLIGHT
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
__ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),
#endif
};
@@ -551,7 +551,7 @@ void fb_cleanup_device(struct fb_info *fb_info)
}
}
-#ifdef CONFIG_FB_BACKLIGHT
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
/* This function generates a linear backlight curve
*
* 0: off
diff --git a/include/linux/fb.h b/include/linux/fb.h
index a3cab6dc9b44..7cdd31a69719 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -485,7 +485,7 @@ struct fb_info {
struct list_head modelist; /* mode list */
struct fb_videomode *mode; /* current mode */
-#ifdef CONFIG_FB_BACKLIGHT
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
/* assigned backlight device */
/* set before framebuffer registration,
remove after unregister */
diff --git a/include/uapi/linux/fb.h b/include/uapi/linux/fb.h
index 6cd9b198b7c6..b6aac7ee1f67 100644
--- a/include/uapi/linux/fb.h
+++ b/include/uapi/linux/fb.h
@@ -393,11 +393,9 @@ struct fb_cursor {
struct fb_image image; /* Cursor image */
};
-#ifdef CONFIG_FB_BACKLIGHT
/* Settings for the generic backlight code */
#define FB_BACKLIGHT_LEVELS 128
#define FB_BACKLIGHT_MAX 0xFF
-#endif
#endif /* _UAPI_LINUX_FB_H */
--
2.17.2
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