OMAPDSS: Add N800 panel driver

This is a driver for N800's display, ported from the old omapfb. This is
a slightly lighter version of the driver as not all features of the old
driver can be ported without big changes to DSS2, and also because some
of the HW features used in the old driver are unclear (e.g. the power
management part).

That said, the new driver works fine for basic use.

Architecturally the driver is not as neat as it could be. N800's display
HW consists of a display buffer chip and a panel, and ideally they would
be represented by separate, independent drivers. This is not currently
possible, and this driver contains both buffer chip and panel driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/displays/Kconfig

@@ -62,4 +62,11 @@ config PANEL_ACX565AKM
 	select BACKLIGHT_CLASS_DEVICE
 	help
 	  This is the LCD panel used on Nokia N900
+
+config PANEL_N8X0
+	tristate "N8X0 Panel"
+	depends on OMAP2_DSS_RFBI && SPI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  This is the LCD panel used on Nokia N8x0
 endmenu

drivers/video/omap2/displays/Makefile

@@ -8,3 +8,4 @@ obj-$(CONFIG_PANEL_TAAL) += panel-taal.o
 obj-$(CONFIG_PANEL_PICODLP) +=  panel-picodlp.o
 obj-$(CONFIG_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
 obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o
+obj-$(CONFIG_PANEL_N8X0) += panel-n8x0.o

include/video/omap-panel-n8x0.h

@@ -0,0 +1,15 @@
+#ifndef __OMAP_PANEL_N8X0_H
+#define __OMAP_PANEL_N8X0_H
+
+struct omap_dss_device;
+
+struct panel_n8x0_data {
+	int (*platform_enable)(struct omap_dss_device *dssdev);
+	void (*platform_disable)(struct omap_dss_device *dssdev);
+	int panel_reset;
+	int ctrl_pwrdown;
+
+	int (*set_backlight)(struct omap_dss_device *dssdev, int level);
+};
+
+#endif