V4L/DVB (12413): radio-si470x: separate common and usb code

This patch is a preceding work to add the i2c interface of si470x.
The si470x directory includes a common file and usb specific file and
header file.
The part unrelated with usb interface and i2c interface exists in
radio-si470x-common.c file, and The usb specific part exists in
radio-si470x-usb.c file.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
[tobias.lorenz@gmx.net: Small changes, due to new include "linux/smp_lock.h"]
Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 22 deletions

diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index 3315cac875e5..41bbec6df327 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -351,29 +351,11 @@ config USB_DSBR
           To compile this driver as a module, choose M here: the
           module will be called dsbr100.
 
-config USB_SI470X
-        tristate "Silicon Labs Si470x FM Radio Receiver support"
-        depends on USB && VIDEO_V4L2
-        ---help---
-          This is a driver for USB devices with the Silicon Labs SI470x
-          chip. Currently these devices are known to work:
-          - 10c4:818a: Silicon Labs USB FM Radio Reference Design
-          - 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
-          - 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
-
-          Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
-          if you don't want to use the device solely for RDS receiving,
-          it is recommended to also select SND_USB_AUDIO.
-
-          Please have a look at the documentation, especially on how
-          to redirect the audio stream from the radio to your sound device:
-          Documentation/video4linux/si470x.txt
-
-          Say Y here if you want to connect this type of radio to your
-          computer's USB port.
+config RADIO_SI470X
+        bool "Silicon Labs Si470x FM Radio Receiver support"
+        depends on VIDEO_V4L2
 
-          To compile this driver as a module, choose M here: the
-          module will be called radio-si470x.
+source "drivers/media/radio/si470x/Kconfig"
 
 config USB_MR800
         tristate "AverMedia MR 800 USB FM radio support"