Staging: add lcd-panel driver

This adds the lcd-panel parallel port driver to the staging tree.

See the file, drivers/staging/panel/TODO for what needs to be fixed up
in order for this to be properly merged into the rest of the kernel
tree.

Cc: Willy Tarreau <w@1wt.eu>
Cc: Frank Menne <frank.menne@hsm.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -77,5 +77,7 @@ source "drivers/staging/comedi/Kconfig"
 
 source "drivers/staging/asus_oled/Kconfig"
 
+source "drivers/staging/panel/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING

drivers/staging/Makefile

@@ -21,3 +21,4 @@ obj-$(CONFIG_RT2860)		+= rt2860/
 obj-$(CONFIG_BENET)		+= benet/
 obj-$(CONFIG_COMEDI)		+= comedi/
 obj-$(CONFIG_ASUS_OLED)		+= asus_oled/
+obj-$(CONFIG_PANEL)		+= panel/

drivers/staging/panel/Makefile

+obj-$(CONFIG_PANEL)		+= panel.o

drivers/staging/panel/TODO

+TODO:
+	- checkpatch.pl cleanups
+	- Lindent
+	- review major/minor usages
+	- review userspace api
+	- see if all of this could be easier done in userspace instead.
+
+Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
+Willy Tarreau <willy@meta-x.org>

drivers/staging/panel/lcd-panel-cgram.txt

+Some LCDs allow you to define up to 8 characters, mapped to ASCII
+characters 0 to 7. The escape code to define a new character is
+'\e[LG' followed by one digit from 0 to 7, representing the character
+number, and up to 8 couples of hex digits terminated by a semi-colon
+(';'). Each couple of digits represents a line, with 1-bits for each
+illuminated pixel with LSB on the right. Lines are numberred from the
+top of the character to the bottom. On a 5x7 matrix, only the 5 lower
+bits of the 7 first bytes are used for each character. If the string
+is incomplete, only complete lines will be redefined. Here are some
+examples :
+
+  printf "\e[LG0010101050D1F0C04;"  => 0 = [enter]
+  printf "\e[LG1040E1F0000000000;"  => 1 = [up]
+  printf "\e[LG2000000001F0E0400;"  => 2 = [down]
+  printf "\e[LG3040E1F001F0E0400;"  => 3 = [up-down]
+  printf "\e[LG40002060E1E0E0602;"  => 4 = [left]
+  printf "\e[LG500080C0E0F0E0C08;"  => 5 = [right]
+  printf "\e[LG60016051516141400;"  => 6 = "IP"
+
+  printf "\e[LG00103071F1F070301;"  => big speaker
+  printf "\e[LG00002061E1E060200;"  => small speaker
+
+Willy
+