IIO: Move the core files to drivers/iio

Take the core support + the kfifo buffer implentation out of
staging. Whilst we are far from done in improving this subsystem
it is now at a stage where the userspae interfaces (provided by
the core) can be considered stable.

Drivers will follow over a longer time scale.

Signed-off-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/Kconfig

···
 
 source "drivers/devfreq/Kconfig"
 
+source "drivers/iio/Kconfig"
+
 endmenu

drivers/Makefile

···
 obj-$(CONFIG_HYPERV)		+= hv/
 
 obj-$(CONFIG_PM_DEVFREQ)	+= devfreq/
+obj-$(CONFIG_IIO)		+= iio/

drivers/iio/Kconfig

···
+#
+# Industrial I/O subsytem configuration
+#
+
+menuconfig IIO
+	tristate "Industrial I/O support"
+	depends on GENERIC_HARDIRQS
+	help
+	  The industrial I/O subsystem provides a unified framework for
+	  drivers for many different types of embedded sensors using a
+	  number of different physical interfaces (i2c, spi, etc). See
+	  Documentation/iio for more information.
+
+if IIO
+
+config IIO_BUFFER
+	bool "Enable buffer support within IIO"
+	help
+	  Provide core support for various buffer based data
+	  acquisition methods.
+
+if IIO_BUFFER
+
+config IIO_KFIFO_BUF
+	select IIO_TRIGGER
+	tristate "Industrial I/O buffering based on kfifo"
+	help
+	  A simple fifo based on kfifo.  Use this if you want a fifo
+	  rather than a ring buffer. Note that this currently provides
+	  no buffer events so it is up to userspace to work out how
+	  often to read from the buffer.
+
+endif # IIO_BUFFER
+
+config IIO_TRIGGER
+	boolean "Enable triggered sampling support"
+	help
+	  Provides IIO core support for triggers.  Currently these
+	  are used to initialize capture of samples to push into
+	  ring buffers.  The triggers are effectively a 'capture
+	  data now' interrupt.
+
+config IIO_CONSUMERS_PER_TRIGGER
+       int "Maximum number of consumers per trigger"
+       depends on IIO_TRIGGER
+       default "2"
+       help
+	This value controls the maximum number of consumers that a
+	given trigger may handle. Default is 2.
+
+endif # IIO

drivers/iio/Makefile

···
+#
+# Makefile for the industrial I/O core.
+#
+
+obj-$(CONFIG_IIO) += industrialio.o
+industrialio-y := industrialio-core.o industrialio-event.o inkern.o
+industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
+industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
+
+obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o

drivers/staging/iio/Kconfig

···
 #
 # Industrial I/O subsytem configuration
 #
+menu "IIO staging drivers"
+	depends on IIO
 
-menuconfig IIO
-	tristate "Industrial I/O support"
-	depends on GENERIC_HARDIRQS
-	help
-	  The industrial I/O subsystem provides a unified framework for
-	  drivers for many different types of embedded sensors using a
-	  number of different physical interfaces (i2c, spi, etc). See
-	  drivers/staging/iio/Documentation for more information.
-if IIO
 config IIO_ST_HWMON
 	tristate "Hwmon driver that uses channels specified via iio maps"
 	depends on HWMON
···
 	  This is a platform driver that in combination with a suitable
 	  map allows IIO devices to provide  basic hwmon functionality
 	  for those channels specified in the map.
-
-config IIO_BUFFER
-	bool "Enable buffer support within IIO"
-	help
-	  Provide core support for various buffer based data
-	  acquisition methods.
 
 if IIO_BUFFER
 
···
 	  with the intention that some devices would be able to write
 	  in interrupt context.
 
-config IIO_KFIFO_BUF
-	select IIO_TRIGGER
-	tristate "Industrial I/O buffering based on kfifo"
-	help
-	  A simple fifo based on kfifo.  Use this if you want a fifo
-	  rather than a ring buffer. Note that this currently provides
-	  no buffer events so it is up to userspace to work out how
-	  often to read from the buffer.
-
 endif # IIO_BUFFER
-
-config IIO_TRIGGER
-	boolean "Enable triggered sampling support"
-	help
-	  Provides IIO core support for triggers.  Currently these
-	  are used to initialize capture of samples to push into
-	  ring buffers.  The triggers are effectively a 'capture
-	  data now' interrupt.
-
-config IIO_CONSUMERS_PER_TRIGGER
-       int "Maximum number of consumers per trigger"
-       depends on IIO_TRIGGER
-       default "2"
-       help
-	This value controls the maximum number of consumers that a
-	given trigger may handle. Default is 2.
 
 source "drivers/staging/iio/accel/Kconfig"
 source "drivers/staging/iio/adc/Kconfig"
···
 
 endif # IIO_SIMPLE_DUMMY
 
-endif # IIO
+endmenu

drivers/staging/iio/Makefile

···
 # Makefile for the industrial I/O core.
 #
 
-obj-$(CONFIG_IIO) += industrialio.o
-industrialio-y := industrialio-core.o industrialio-event.o inkern.o
-industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
-industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
-
 obj-$(CONFIG_IIO_SW_RING) += ring_sw.o
-obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o
 
 obj-$(CONFIG_IIO_SIMPLE_DUMMY) += iio_dummy.o
 iio_dummy-y := iio_simple_dummy.o