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 <dmunsie@cecropia.com>

2 files changed, 21 insertions, 3 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 5a2840aeb547..743c853ad150 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -809,6 +809,8 @@ config FB_INTEL
         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
@@ -818,17 +820,31 @@ config FB_INTEL
           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"
         depends on FB && PCI
diff --git a/drivers/video/intelfb/Makefile b/drivers/video/intelfb/Makefile
index 722d21d6e5cd..6c782d3ae1be 100644
--- a/drivers/video/intelfb/Makefile
+++ b/drivers/video/intelfb/Makefile
@@ -1,6 +1,8 @@
 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