v7a: Add support for Raspberry Pi CM3

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 23 insertions, 1 deletions

diff --git a/doc/hardware_v7a_raspi3.rst b/doc/hardware_v7a_raspi3.rst
index d874233..a4069c2 100644
--- a/doc/hardware_v7a_raspi3.rst
+++ b/doc/hardware_v7a_raspi3.rst
@@ -7,9 +7,31 @@ Use the image ``platform-v7a/images/rpi3.hdimg`` and copy it onto your MicroSD-C
 
 Serial Console
 --------------
-The serial boot console is available at J8 (the GPIO header) with 115200 Baud and 8N1 on the following Pins:
+The serial boot console is available at J8 (the GPIO header) with 115200 Baud and 8N1 on the following pins:
 
 * J8.6: GND
 * J8.8: Tx
 * J8.10: Rx
 
+Raspberry Pi Compute Module 3+
+==============================
+
+Boot Media
+----------
+Use the image ``platform-v7a/images/rpicm3.hdimg`` and copy it onto your MicroSD-Card.
+
+If you have a hardware with eMMC the uSD slot is not functional, in this case
+you have to use `usbboot <https://github.com/raspberrypi/usbboot`_ to switch
+the hardware into USB mass storage mode. See their documentation and
+`"Flashing the Compute Module eMMC" at raspberrypi.org
+<https://www.raspberrypi.org/documentation/hardware/computemodule/cm-emmc-flashing.md>`
+for details.
+
+Serial Console
+--------------
+The serial boot console is available at the GPIOx BANK0 header (J5) on the following pins with the Compute Module IO Board V3.0:
+
+* GPIO14: TX
+* GPIO15: RX
+
+For GND there are several labeled pins available on J5.