Adding some documentation

[Juergen Beisert]

Add some (helpful?) comments about the meaning of 'framebuffer' and
'framebuffer_ovl' structure members.

Signed-off-by: Juergenn Beisert <jbe at pengutronix.de>

---
 arch/arm/mach-imx/include/mach/imxfb.h |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: u-boot-v2/arch/arm/mach-imx/include/mach/imxfb.h
===================================================================
--- u-boot-v2.orig/arch/arm/mach-imx/include/mach/imxfb.h
+++ u-boot-v2/arch/arm/mach-imx/include/mach/imxfb.h
@@ -55,6 +55,9 @@ struct imx_fb_videomode {
 	unsigned char	bpp;
 };
 
+/**
+ * Define relevant framebuffer information
+ */
 struct imx_fb_platform_data {
 	struct imx_fb_videomode *mode;
 
@@ -67,9 +70,15 @@ struct imx_fb_platform_data {
 	u_int		lscr1;
 	u_int		dmacr;
 
+	/** force a memory area to be used, else NULL for dynamic allocation */
 	void		*framebuffer;
+	/** force a memory area to be used, else NULL for dynamic allocation */
 	void		*framebuffer_ovl;
 };
 
 void set_imx_fb_info(struct imx_fb_platform_data *);
 
+/**
+ * @file
+ * @brief i.MX related framebuffer declarations
+ */

-- 
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