[media] smiapp: Add driver

Add driver for SMIA++/SMIA image sensors. The driver exposes the sensor as
three subdevs, pixel array, binner and scaler --- in case the device has a
scaler.

Currently it relies on the board code for external clock handling. There is
no fast way out of this dependency before the ISP drivers (omap3isp) among
others will be able to export that clock through the clock framework
instead.

Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -559,6 +559,8 @@ config VIDEO_S5K6AA
 	  This is a V4L2 sensor-level driver for Samsung S5K6AA(FX) 1.3M
 	  camera sensor with an embedded SoC image signal processor.
 
+source "drivers/media/video/smiapp/Kconfig"
+
 comment "Flash devices"
 
 config VIDEO_ADP1653

drivers/media/video/Makefile

@@ -79,6 +79,7 @@ obj-$(CONFIG_VIDEO_SR030PC30)	+= sr030pc30.o
 obj-$(CONFIG_VIDEO_NOON010PC30)	+= noon010pc30.o
 obj-$(CONFIG_VIDEO_M5MOLS)	+= m5mols/
 obj-$(CONFIG_VIDEO_S5K6AA)	+= s5k6aa.o
+obj-$(CONFIG_VIDEO_SMIAPP)	+= smiapp/
 obj-$(CONFIG_VIDEO_ADP1653)	+= adp1653.o
 obj-$(CONFIG_VIDEO_AS3645A)	+= as3645a.o
 

drivers/media/video/smiapp-pll.c

@@ -22,6 +22,8 @@
  *
  */
 
+#include "smiapp/smiapp-debug.h"
+
 #include <linux/gcd.h>
 #include <linux/lcm.h>
 #include <linux/module.h>

drivers/media/video/smiapp/Kconfig

@@ -0,0 +1,13 @@
+config VIDEO_SMIAPP
+	tristate "SMIA++/SMIA sensor support"
+	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	select VIDEO_SMIAPP_PLL
+	---help---
+	  This is a generic driver for SMIA++/SMIA camera modules.
+
+config VIDEO_SMIAPP_DEBUG
+	bool "Enable debugging for the generic SMIA++/SMIA driver"
+	depends on VIDEO_SMIAPP
+	---help---
+	  Enable debugging output in the generic SMIA++/SMIA driver. If you
+	  are developing the driver you might want to enable this.

drivers/media/video/smiapp/Makefile

@@ -0,0 +1,3 @@
+smiapp-objs			+= smiapp-core.o smiapp-regs.o \
+				   smiapp-quirk.o smiapp-limits.o
+obj-$(CONFIG_VIDEO_SMIAPP)	+= smiapp.o