raspberry_pi.md: Update docs to reflect latest rpi changes

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

README.md

@@ -25,7 +25,7 @@ X86
 
 ARM
 ---
-* [Raspberry Pi - Model B](../master/docs/raspberry_pi_b.md)
+* [Raspberry Pi](../master/docs/raspberry_pi.md)
 
 Installing on your board
 ========

docs/index.md

@@ -42,7 +42,7 @@ Specific platform information for supported platforms is documented here:
 - @ref edison
 - @ref de3815
 - @ref minnowmax
-- @ref rasppib
+- @ref rasppi
 
 ## DEBUGGING
 

docs/raspberry_pi.md

@@ -1,28 +1,29 @@
-Raspberry Pi Model B    {#rasppib}
+Raspberry Pi    {#rasppi}
-====================
+============
 
-The Raspberry Pi is based on the Broadcom BCM2835 system on a chip,
+The Raspberry Pi is based on the Broadcom BCM2835 system on a chip, which
-which includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU
+includes an ARM1176JZF-S 700 MHz processor, VideoCore IV GPU and was originally
-and was originally shipped with 256 megabytes of RAM, later 
+shipped with 256 megabytes of RAM, later upgraded (Model B & Model B+) to 512
-upgraded (Model B & Model B+) to 512 MB.
+MB. The Raspberry Pi 2 is based on an armv7 CPU but shares a number of
+similarities with the original.
 
 Revision Support
 ----------------
-Currently only rev 1 is supported.
+Raspberry Pi A/B/A+/B+
+Raspberry Pi 2 B
 
 Interface notes
 ---------------
-**GPIO** Supported on pin 6,10,11,12,14,15,17,21
 
 **PWM** Whilst the Raspberry Pi is meant to have 1 PWM channel this is currently not supported.
 
-**I2C** The blacklist for the kernel module will need to be removed and the `i2c-dev` needs to be loaded.
-
-**SPI** The blacklist for the kernel module needs to be removed and `spidev` loaded
-
 Pin Mapping
 -----------
 
+This pin mapping refers to the first generation 'B' model Pi but gives an idea
+as to what the values are from mraa. Note that there is an emum to use wiringPi
+style numbers.
+
 | MRAA Number | Physical Pin | Function |
 |-------------|--------------|----------|
 | 1           | P1-01        | 3V3 VCC  |