Hi,
the latest RP2/RP3 image has support for RTL2832 and R820T included.
Here the output from dmesg after plugging in a RTL2832U + R820T2 Mini DVB-T + DAB + FM USB dongle.
[ 352.634674] usb 1-1.3.3: new high-speed USB device number 14 using dwc_otg
[ 352.746645] usb 1-1.3.3: New USB device found, idVendor=0bda, idProduct=2838
[ 352.746669] usb 1-1.3.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 352.746684] usb 1-1.3.3: Product: RTL2838UHIDIR
[ 352.746699] usb 1-1.3.3: Manufacturer: Realtek
[ 352.746712] usb 1-1.3.3: SerialNumber: 00000001
[ 352.816752] usb 1-1.3.3: dvb_usb_v2: found a 'Realtek RTL2832U reference design' in warm state
[ 352.871559] usb 1-1.3.3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[ 352.871639] DVB: registering new adapter (Realtek RTL2832U reference design)
[ 352.896647] i2c i2c-3: Added multiplexed i2c bus 4
[ 352.896677] rtl2832 3-0010: Realtek RTL2832 successfully attached
[ 352.896741] usb 1-1.3.3: DVB: registering adapter 0 frontend 0 (Realtek RTL2832 (DVB-T))...
[ 352.919081] r820t 4-001a: creating new instance
[ 352.931020] r820t 4-001a: Rafael Micro r820t successfully identified
[ 352.943721] media: Linux media interface: v0.10
[ 352.965079] Linux video capture interface: v2.00
[ 352.988395] rtl2832_sdr rtl2832_sdr.0.auto: Registered as swradio0
[ 352.988422] rtl2832_sdr rtl2832_sdr.0.auto: Realtek RTL2832 SDR attached
[ 352.988438] rtl2832_sdr rtl2832_sdr.0.auto: SDR API is still slightly experimental and functionality changes may follow
[ 352.995178] Registered IR keymap rc-empty
[ 352.995688] input: Realtek RTL2832U reference design as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3.3/rc/rc0/input2
[ 352.996037] rc0: Realtek RTL2832U reference design as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3.3/rc/rc0
[ 353.012095] IR NEC protocol handler initialized
[ 353.016067] IR RC5(x/sz) protocol handler initialized
[ 353.021133] IR JVC protocol handler initialized
[ 353.021647] IR RC6 protocol handler initialized
[ 353.024404] IR Sony protocol handler initialized
[ 353.029777] IR SANYO protocol handler initialized
[ 353.036198] usb 1-1.3.3: dvb_usb_v2: schedule remote query interval to 200 msecs
[ 353.038293] IR Sharp protocol handler initialized
[ 353.039194] input: MCE IR Keyboard/Mouse (dvb_usb_rtl28xxu) as /devices/virtual/input/input3
[ 353.039958] IR MCE Keyboard/mouse protocol handler initialized
[ 353.044493] IR XMP protocol handler initialized
[ 353.044543] lirc_dev: IR Remote Control driver registered, major 242
[ 353.047606] usb 1-1.3.3: dvb_usb_v2: 'Realtek RTL2832U reference design' successfully initialized and connected
[ 353.047929] usbcore: registered new interface driver dvb_usb_rtl28xxu
[ 353.048971] rc rc0: lirc_dev: driver ir-lirc-codec (dvb_usb_rtl28xxu) registered at minor = 0
[ 353.048994] IR LIRC bridge handler initialized
Frank