From fa587c0f5aa0015e19d351f69e07e4ea4c1c84f2 2017-01-23 22:23:54
From: drtyhlpr <mail@jwagner.eu>
Date: 2017-01-23 22:23:54
Subject: [PATCH] Added: I2C and SPI interface support

---

diff --git a/README.md b/README.md
index 5ab0071..137493a 100644
--- a/README.md
+++ b/README.md
@@ -134,6 +134,12 @@ Set the IP address for the second NTP server.
 ##### `ENABLE_CONSOLE`=true
 Enable serial console interface. Recommended if no monitor or keyboard is connected to the RPi2/3. In case of problems fe. if the network (auto) configuration failed - the serial console can be used to access the system.
 
+##### `ENABLE_I2C`=false
+Enable I2C interface on the RPi2/3. Please check the [RPi2/3 pinout diagrams](http://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
+
+##### `ENABLE_SPI`=false
+Enable SPI interface on the RPi2/3. Please check the [RPi2/3 pinout diagrams](http://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
+
 ##### `ENABLE_IPV6`=true
 Enable IPv6 support. The network interface configuration is managed via systemd-networkd.
 
diff --git a/bootstrap.d/13-kernel.sh b/bootstrap.d/13-kernel.sh
index ddfed3d..ada4691 100644
--- a/bootstrap.d/13-kernel.sh
+++ b/bootstrap.d/13-kernel.sh
@@ -257,6 +257,22 @@ if [ "$ENABLE_SOUND" = true ] ; then
   sed -i "s/^# snd_bcm2835/snd_bcm2835/" "${R}/lib/modules-load.d/rpi2.conf"
 fi
 
+# Enable I2C interface
+if [ "$ENABLE_I2C" = true ] ; then
+  echo "dtparam=i2c_arm=on" >> "${BOOT_DIR}/config.txt"
+  sed -i "s/^# i2c-bcm2708/i2c-bcm2708/" "${R}/lib/modules-load.d/rpi2.conf"
+  sed -i "s/^# i2c-dev/i2c-dev/" "${R}/lib/modules-load.d/rpi2.conf"
+fi
+
+# Enable SPI interface
+if [ "$ENABLE_SPI" = true ] ; then
+  echo "dtparam=spi=on" >> "${BOOT_DIR}/config.txt"
+  echo "spi-bcm2708" >> "${R}/lib/modules-load.d/rpi2.conf"
+  if [ "$RPI_MODEL" = 3 ] ; then
+    sed -i "s/spi-bcm2708/spi-bcm2835/" "${R}/lib/modules-load.d/rpi2.conf"
+  fi
+fi
+
 # Install kernel modules blacklist
 mkdir -p "${ETC_DIR}/modprobe.d/"
 install_readonly files/modules/raspi-blacklist.conf "${ETC_DIR}/modprobe.d/raspi-blacklist.conf"
diff --git a/rpi23-gen-image.sh b/rpi23-gen-image.sh
index 4f3ab6f..6a891cb 100755
--- a/rpi23-gen-image.sh
+++ b/rpi23-gen-image.sh
@@ -112,6 +112,8 @@ APT_SERVER=${APT_SERVER:="ftp.debian.org"}
 
 # Feature settings
 ENABLE_CONSOLE=${ENABLE_CONSOLE:=true}
+ENABLE_I2C=${ENABLE_I2C:=false}
+ENABLE_SPI=${ENABLE_SPI:=false}
 ENABLE_IPV6=${ENABLE_IPV6:=true}
 ENABLE_SSHD=${ENABLE_SSHD:=true}
 ENABLE_NONFREE=${ENABLE_NONFREE:=false}