Revert "[media] v4l2: Add a V4L2 driver for SI476X MFD"

As requested by Andrey Smirnov <andrew.smirnov@gmail.com>, revert
this patch.

This reverts commit 30bac9110455402fa8888740c6819dd3daa2666f.

Conflicts:
	drivers/media/radio/Kconfig
	drivers/media/radio/radio-si476x.c

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 0 insertions, 187 deletions

diff --git a/Documentation/video4linux/si476x.txt b/Documentation/video4linux/si476x.txt
deleted file mode 100644
index d1a08db2cbd..00000000000
--- a/Documentation/video4linux/si476x.txt
+++ /dev/null
@@ -1,187 +0,0 @@
-SI476x Driver Readme
-------------------------------------------------
-	Copyright (C) 2013 Andrey Smirnov <andrew.smirnov@gmail.com>
-
-TODO for the driver
-------------------------------
-
-- According to the SiLabs' datasheet it is possible to update the
-  firmware of the radio chip in the run-time, thus bringing it to the
-  most recent version. Unfortunately I couldn't find any mentioning of
-  the said firmware update for the old chips that I tested the driver
-  against, so for chips like that the driver only exposes the old
-  functionality.
-
-
-Parameters exposed over debugfs
--------------------------------
-SI476x allow user to get multiple characteristics that can be very
-useful for EoL testing/RF performance estimation, parameters that have
-very little to do with V4L2 subsystem. Such parameters are exposed via
-debugfs and can be accessed via regular file I/O operations.
-
-The drivers exposes following files:
-
-* /sys/kernel/debug/<device-name>/acf
-  This file contains ACF(Automatically Controlled Features) status
-  information. The contents of the file is binary data of the
-  following layout:
-
-  Offset	| Name		| Description
-  ====================================================================
-  0x00		| blend_int	| Flag, set when stereo separation has
-  		|  		| crossed below the blend threshold
-  --------------------------------------------------------------------
-  0x01		| hblend_int	| Flag, set when HiBlend cutoff
-  		| 		| frequency is lower than threshold
-  --------------------------------------------------------------------
-  0x02		| hicut_int	| Flag, set when HiCut cutoff
-  		| 		| frequency is lower than threshold
-  --------------------------------------------------------------------
-  0x03		| chbw_int	| Flag, set when channel filter
-  		| 		| bandwidth is less than threshold
-  --------------------------------------------------------------------
-  0x04		| softmute_int	| Flag indicating that softmute
-  		| 		| attenuation has increased above
-		|		| softmute threshold
-  --------------------------------------------------------------------
-  0x05		| smute		| 0 - Audio is not soft muted
-  		| 		| 1 - Audio is soft muted
-  --------------------------------------------------------------------
-  0x06		| smattn	| Soft mute attenuation level in dB
-  --------------------------------------------------------------------
-  0x07		| chbw		| Channel filter bandwidth in kHz
-  --------------------------------------------------------------------
-  0x08		| hicut		| HiCut cutoff frequency in units of
-  		| 		| 100Hz
-  --------------------------------------------------------------------
-  0x09		| hiblend	| HiBlend cutoff frequency in units
-  		| 		| of 100 Hz
-  --------------------------------------------------------------------
-  0x10		| pilot		| 0 - Stereo pilot is not present
-  		| 		| 1 - Stereo pilot is present
-  --------------------------------------------------------------------
-  0x11		| stblend	| Stereo blend in %
-  --------------------------------------------------------------------
-
-
-* /sys/kernel/debug/<device-name>/rds_blckcnt
-  This file contains statistics about RDS receptions. It's binary data
-  has the following layout:
-
-  Offset	| Name		| Description
-  ====================================================================
-  0x00		| expected	| Number of expected RDS blocks
-  --------------------------------------------------------------------
-  0x02		| received	| Number of received RDS blocks
-  --------------------------------------------------------------------
-  0x04		| uncorrectable	| Number of uncorrectable RDS blocks
-  --------------------------------------------------------------------
-
-* /sys/kernel/debug/<device-name>/agc
-  This file contains information about parameters pertaining to
-  AGC(Automatic Gain Control)
-
-  The layout is:
-  Offset	| Name		| Description
-  ====================================================================
-  0x00		| mxhi		| 0 - FM Mixer PD high threshold is
-  		| 		| not tripped
-		|		| 1 - FM Mixer PD high threshold is
-		|		| tripped
-  --------------------------------------------------------------------
-  0x01		| mxlo		| ditto for FM Mixer PD low
-  --------------------------------------------------------------------
-  0x02		| lnahi		| ditto for FM LNA PD high
-  --------------------------------------------------------------------
-  0x03		| lnalo		| ditto for FM LNA PD low
-  --------------------------------------------------------------------
-  0x04		| fmagc1	| FMAGC1 attenuator resistance
-  		| 		| (see datasheet for more detail)
-  --------------------------------------------------------------------
-  0x05		| fmagc2	| ditto for FMAGC2
-  --------------------------------------------------------------------
-  0x06		| pgagain	| PGA gain in dB
-  --------------------------------------------------------------------
-  0x07		| fmwblang	| FM/WB LNA Gain in dB
-  --------------------------------------------------------------------
-
-* /sys/kernel/debug/<device-name>/rsq
-  This file contains information about parameters pertaining to
-  RSQ(Received Signal Quality)
-
-  The layout is:
-  Offset	| Name		| Description
-  ====================================================================
-  0x00		| multhint	| 0 - multipath value has not crossed
-  		| 		| the Multipath high threshold
-		|		| 1 - multipath value has crossed
-  		| 		| the Multipath high threshold
-  --------------------------------------------------------------------
-  0x01		| multlint	| ditto for Multipath low threshold
-  --------------------------------------------------------------------
-  0x02		| snrhint	| 0 - received signal's SNR has not
-  		| 		| crossed high threshold
-		|		| 1 - received signal's SNR has
-  		| 		| crossed high threshold
-  --------------------------------------------------------------------
-  0x03		| snrlint	| ditto for low threshold
-  --------------------------------------------------------------------
-  0x04		| rssihint	| ditto for RSSI high threshold
-  --------------------------------------------------------------------
-  0x05		| rssilint	| ditto for RSSI low threshold
-  --------------------------------------------------------------------
-  0x06		| bltf		| Flag indicating if seek command
-  		| 		| reached/wrapped seek band limit
-  --------------------------------------------------------------------
-  0x07		| snr_ready	| Indicates that SNR metrics is ready
-  --------------------------------------------------------------------
-  0x08		| rssiready	| ditto for RSSI metrics
-  --------------------------------------------------------------------
-  0x09		| injside	| 0 - Low-side injection is being used
-  		| 		| 1 - High-side injection is used
-  --------------------------------------------------------------------
-  0x10		| afcrl		| Flag indicating if AFC rails
-  --------------------------------------------------------------------
-  0x11		| valid		| Flag indicating if channel is valid
-  --------------------------------------------------------------------
-  0x12		| readfreq	| Current tuned frequency
-  --------------------------------------------------------------------
-  0x14		| freqoff	| Singed frequency offset in units of
-  		| 		| 2ppm
-  --------------------------------------------------------------------
-  0x15		| rssi		| Signed value of RSSI in dBuV
-  --------------------------------------------------------------------
-  0x16		| snr		| Signed RF SNR in dB
-  --------------------------------------------------------------------
-  0x17		| issi		| Signed Image Strength Signal
-  		| 		| indicator
-  --------------------------------------------------------------------
-  0x18		| lassi		| Signed Low side adjacent Channel
-  		| 		| Strength indicator
-  --------------------------------------------------------------------
-  0x19		| hassi		| ditto fpr High side
-  --------------------------------------------------------------------
-  0x20		| mult		| Multipath indicator
-  --------------------------------------------------------------------
-  0x21		| dev		| Frequency deviation
-  --------------------------------------------------------------------
-  0x24		| assi		| Adjascent channel SSI
-  --------------------------------------------------------------------
-  0x25		| usn		| Ultrasonic noise indicator
-  --------------------------------------------------------------------
-  0x26		| pilotdev	| Pilot deviation in units of 100 Hz
-  --------------------------------------------------------------------
-  0x27		| rdsdev	| ditto for RDS
-  --------------------------------------------------------------------
-  0x28		| assidev	| ditto for ASSI
-  --------------------------------------------------------------------
-  0x29		| strongdev	| Frequency deviation
-  --------------------------------------------------------------------
-  0x30		| rdspi		| RDS PI code
-  --------------------------------------------------------------------
-
-* /sys/kernel/debug/<device-name>/rsq_primary
-  This file contains information about parameters pertaining to
-  RSQ(Received Signal Quality) for primary tuner only. Layout is as
-  the one above.