OMAP2, 3: DSS2: Create new file display.c for central dss driver registration.

A new file display.c is introduced for display driver init, which adds a function
omap_display_init to do the DSS driver registration. This is the first step in moving
away registration of DSS from board files into a common place.
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Senthilvadivu Guruswamy <svadivu@ti.com>
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

arch/arm/mach-omap2/Makefile

@@ -245,3 +245,6 @@ obj-y					+= $(smc91x-m) $(smc91x-y)
 smsc911x-$(CONFIG_SMSC911X)		:= gpmc-smsc911x.o
 obj-y					+= $(smsc911x-m) $(smsc911x-y)
 obj-$(CONFIG_ARCH_OMAP4)		+= hwspinlock.o
+
+disp-$(CONFIG_OMAP2_DSS)		:= display.o
+obj-y					+= $(disp-m) $(disp-y)

arch/arm/mach-omap2/display.c

+/*
+ * OMAP2plus display device setup / initialization.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *	Senthilvadivu Guruswamy
+ *	Sumit Semwal
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+#include <plat/display.h>
+
+static struct platform_device omap_display_device = {
+	.name          = "omapdss",
+	.id            = -1,
+	.dev            = {
+		.platform_data = NULL,
+	},
+};
+
+int __init omap_display_init(struct omap_dss_board_info *board_data)
+{
+	int r = 0;
+	omap_display_device.dev.platform_data = board_data;
+
+	r = platform_device_register(&omap_display_device);
+	if (r < 0)
+		printk(KERN_ERR "Unable to register OMAP-Display device\n");
+
+	return r;
+}

arch/arm/plat-omap/include/plat/display.h

@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <linux/kobject.h>
 #include <linux/device.h>
+#include <linux/platform_device.h>
 #include <asm/atomic.h>
 
 #define DISPC_IRQ_FRAMEDONE		(1 << 0)
@@ -226,6 +227,16 @@ struct omap_dss_board_info {
 	struct omap_dss_device *default_device;
 };
 
+#if defined(CONFIG_OMAP2_DSS_MODULE) || defined(CONFIG_OMAP2_DSS)
+/* Init with the board info */
+extern int omap_display_init(struct omap_dss_board_info *board_data);
+#else
+static inline int omap_display_init(struct omap_dss_board_info *board_data)
+{
+	return 0;
+}
+#endif
+
 struct omap_video_timings {
 	/* Unit: pixels */
 	u16 x_res;