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HiKey_AOSP_HID-Over-I2C_README.md

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HID over I2C on HiKey AOSP

This is an example demonstrating HID over I2C on HiKey Android reference board.

Hardware Requirement

How to Build

  1. Initialize your environment as described in http://source.android.com/source/initializing.html
  2. git clone https://android.googlesource.com/kernel/hikey-linaro
  3. cd hikey-linaro
  4. git checkout -b android-hikey-linaro-4.14 origin/android-hikey-linaro-4.14
  5. make ARCH=arm64 hikey_defconfig
  6. Enable HID over I2C by setting CONFIG_I2C_HID=y
  7. Copy device tree patch to kernel root directory and apply patch
    • patch -p1 < ./android-hikey-linaro-4.14_hid-over-i2c.patch
  8. make ARCH=arm64 CROSS_COMPILE=aarch64-linux-android- -j24
  9. Copy output to the AOSP hikey kernel directory (/kernel/hikey-linaro):
    • Copy hi6220-hikey.dtb (arch/arm64/boot/dts/hisilicon/hi6220-hikey.dtb) to the hikey-kernel directory as file hi6220-hikey.dtb-4.14.
    • Copy the Image file (arch/arm64/boot/Image.gz-dtb) to the hikey-kernel directory as file Image.gz-dtb-4.14.
  10. Compiling Android userspace image as described in https://source.android.com/setup/build/devices#620userspace