[Buildroot] [PATCH v2] board: added support for Raspberry Pi Zero W

[Yves Deweerdt <yves.deweerdt.linux@gmail.com>]

added a new config file for the Raspberry Pi Zero W (rpi0w)
- added new folder for raspberrypi0w
- included the overlays in the genimage config
- add pi3-miniuart-bt overlay to the config
- remove rpi0w device tree from the raspberrypi0_defconfig and genimage

Signed-off-by: Yves Deweerdt <yves.deweerdt.linux@gmail.com>
---
 board/raspberrypi/genimage-raspberrypi0.cfg  |  1 -
 board/raspberrypi/genimage-raspberrypi0w.cfg | 31 +++++++++++++++++++++++++
 board/raspberrypi0w                          |  1 +
 configs/raspberrypi0_defconfig               |  2 +-
 configs/raspberrypi0w_defconfig              | 34 ++++++++++++++++++++++++++++
 5 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 board/raspberrypi/genimage-raspberrypi0w.cfg
 create mode 120000 board/raspberrypi0w
 create mode 100644 configs/raspberrypi0w_defconfig

diff --git a/board/raspberrypi/genimage-raspberrypi0.cfg b/board/raspberrypi/genimage-raspberrypi0.cfg
index 212c306..a9d4c45 100644
--- a/board/raspberrypi/genimage-raspberrypi0.cfg
+++ b/board/raspberrypi/genimage-raspberrypi0.cfg
@@ -2,7 +2,6 @@ image boot.vfat {
   vfat {
     files = {
       "bcm2708-rpi-b-plus.dtb",
-      "bcm2708-rpi-0-w.dtb",
       "rpi-firmware/bootcode.bin",
       "rpi-firmware/cmdline.txt",
       "rpi-firmware/config.txt",
diff --git a/board/raspberrypi/genimage-raspberrypi0w.cfg b/board/raspberrypi/genimage-raspberrypi0w.cfg
new file mode 100644
index 0000000..3aafd9b
--- /dev/null
+++ b/board/raspberrypi/genimage-raspberrypi0w.cfg
@@ -0,0 +1,31 @@
+image boot.vfat {
+  vfat {
+    files = {
+      "bcm2708-rpi-0-w.dtb",
+      "rpi-firmware/bootcode.bin",
+      "rpi-firmware/cmdline.txt",
+      "rpi-firmware/config.txt",
+      "rpi-firmware/fixup.dat",
+      "rpi-firmware/start.elf",
+      "rpi-firmware/overlays",
+      "zImage"
+    }
+  }
+  size = 32M
+}
+
+image sdcard.img {
+  hdimage {
+  }
+
+  partition boot {
+    partition-type = 0xC
+    bootable = "true"
+    image = "boot.vfat"
+  }
+
+  partition rootfs {
+    partition-type = 0x83
+    image = "rootfs.ext4"
+  }
+}
diff --git a/board/raspberrypi0w b/board/raspberrypi0w
new file mode 120000
index 0000000..fcdafc8
--- /dev/null
+++ b/board/raspberrypi0w
@@ -0,0 +1 @@
+raspberrypi
\ No newline at end of file
diff --git a/configs/raspberrypi0_defconfig b/configs/raspberrypi0_defconfig
index 10947b8..457999e 100644
--- a/configs/raspberrypi0_defconfig
+++ b/configs/raspberrypi0_defconfig
@@ -16,7 +16,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi"
 # Build the DTBs for A/B from the kernel sources: the zero is the same
 # as the A+ model, just in a different form-factor
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2708-rpi-b-plus bcm2708-rpi-0-w"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2708-rpi-b-plus"
 
 BR2_PACKAGE_RPI_FIRMWARE=y
 # BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
diff --git a/configs/raspberrypi0w_defconfig b/configs/raspberrypi0w_defconfig
new file mode 100644
index 0000000..cecda3d
--- /dev/null
+++ b/configs/raspberrypi0w_defconfig
@@ -0,0 +1,34 @@
+BR2_arm=y
+BR2_arm1176jzf_s=y
+BR2_ARM_EABIHF=y
+
+# Linux headers same as kernel, a 4.9 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_9=y
+
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/raspberrypi/linux.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="5e4ee836560d4c0371e109bf469e1ad808ae7a44"
+BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi"
+
+# build device tree speicifically required for rpi0w
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2708-rpi-0-w"
+
+BR2_PACKAGE_RPI_FIRMWARE=y
+BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS=y
+
+# Required tools to create the SD image
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
+
+# Filesystem / image
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi0w/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi0w/post-image.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay"
-- 
2.7.4