video: Add i.MX23/28 framebuffer driver

changes since v2:

- use v3 and v4 for specifying the ip version instead of i.MX23/28.
  This is a better namespace when future versions are added.
- rename mach/fb.h to mach/mxsfb.h

changes since v1:
- Add a LCDC_ prefix to the register names.
- use set/clear registers where appropriate
- protect call to mxsfb_disable_controller() in mxsfb_remove()
  with a (host->enabled) as suggested by Lothar Wassmann
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NShawn Guo <shawn.guo@freescale.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-fbdev@vger.kernel.org

arch/arm/mach-mxs/include/mach/mxsfb.h

+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifndef __MACH_FB_H
+#define __MACH_FB_H
+
+#include <linux/fb.h>
+
+#define STMLCDIF_8BIT 1	/** pixel data bus to the display is of 8 bit width */
+#define STMLCDIF_16BIT 0 /** pixel data bus to the display is of 16 bit width */
+#define STMLCDIF_18BIT 2 /** pixel data bus to the display is of 18 bit width */
+#define STMLCDIF_24BIT 3 /** pixel data bus to the display is of 24 bit width */
+
+#define FB_SYNC_DATA_ENABLE_HIGH_ACT	(1 << 6)
+#define FB_SYNC_DOTCLK_FAILING_ACT	(1 << 7) /* failing/negtive edge sampling */
+
+struct mxsfb_platform_data {
+	struct fb_videomode *mode_list;
+	unsigned mode_count;
+
+	unsigned default_bpp;
+
+	unsigned dotclk_delay;	/* refer manual HW_LCDIF_VDCTRL4 register */
+	unsigned ld_intf_width;	/* refer STMLCDIF_* macros */
+
+	unsigned fb_size;	/* Size of the video memory. If zero a
+				 * default will be used
+				 */
+	unsigned long fb_phys;	/* physical address for the video memory. If
+				 * zero the framebuffer memory will be dynamically
+				 * allocated. If specified,fb_size must also be specified.
+				 * fb_phys must be unused by Linux.
+				 */
+};
+
+#endif /* __MACH_FB_H */

drivers/video/Kconfig

@@ -2365,6 +2365,15 @@ config FB_JZ4740
 	help
 	  Framebuffer support for the JZ4740 SoC.
 
+config FB_MXS
+	tristate "MXS LCD framebuffer support"
+	depends on FB && ARCH_MXS
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	help
+	  Framebuffer support for the MXS SoC.
+
 source "drivers/video/omap/Kconfig"
 source "drivers/video/omap2/Kconfig"
 

drivers/video/Makefile

@@ -153,6 +153,7 @@ obj-$(CONFIG_FB_BFIN_T350MCQB)	  += bfin-t350mcqb-fb.o
 obj-$(CONFIG_FB_BFIN_7393)        += bfin_adv7393fb.o
 obj-$(CONFIG_FB_MX3)		  += mx3fb.o
 obj-$(CONFIG_FB_DA8XX)		  += da8xx-fb.o
+obj-$(CONFIG_FB_MXS)		  += mxsfb.o
 
 # the test framebuffer is last
 obj-$(CONFIG_FB_VIRTUAL)          += vfb.o