intelfb: add preliminary i2c support

[07/07] intelfb: adds an option to enable I2C support in the intelfb driver. Also adds
the intel_i2c.c file to the Makefile.

Signed-off-by: Dennis Munsie <[e-mail]>

drivers/video/Kconfig

···
 	depends on FB && EXPERIMENTAL && PCI && X86
 	select AGP
 	select AGP_INTEL
+	select I2C_ALGOBIT if FB_INTEL_I2C
+	select I2C if FB_INTEL_I2C
 	select FB_MODE_HELPERS
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
···
           830M/845G/852GM/855GM/865G chipsets.
           Say Y if you have and plan to use such a board.
 
-          To compile this driver as a module, choose M here: the
+	  If you say Y here and want DDC/I2C support you must first say Y to
+	  "I2C support" and "I2C bit-banging support" in the character devices
+	  section.
+
+	  If you say M here then "I2C support" and "I2C bit-banging support"
+	  can be build either as modules or built-in.
+
+	  To compile this driver as a module, choose M here: the
 	  module will be called intelfb.
 
 config FB_INTEL_DEBUG
-        bool "Intel driver Debug Messages"
+	bool "Intel driver Debug Messages"
 	depends on FB_INTEL
 	---help---
 	  Say Y here if you want the Intel driver to output all sorts
 	  of debugging informations to provide to the maintainer when
 	  something goes wrong.
+
+config FB_INTEL_I2C
+	bool "DDC/I2C for Intel framebuffer support"
+	depends on FB_INTEL
+	default y
+	help
+	  Say Y here if you want DDC/I2C support for your on-board Intel graphics.
 
 config FB_MATROX
 	tristate "Matrox acceleration"

drivers/video/intelfb/Makefile

···
 obj-$(CONFIG_FB_INTEL) += intelfb.o
 
-intelfb-objs := intelfbdrv.o intelfbhw.o
+intelfb-y := intelfbdrv.o intelfbhw.o
+intelfb-$(CONFIG_FB_INTEL_I2C) += intelfb_i2c.o
+intelfb-objs := $(intelfb-y)
 
 ifdef CONFIG_FB_INTEL_DEBUG
 #EXTRA_CFLAGS += -DDEBUG -DVERBOSE -DREGDUMP