# APKBUILD based on linux-vanilla aport. Changes:
# - add !check !tracedeps
# - package: just install zImage-dtb and kernel.release, because the kernel config
#	does not generate modules or dtb files
# - do not create -dev subpackage (makes no sense without module support)
#
# Kernel config changes, based on: arch/arm/configs/aosp_rhine_amami_defconfig
# - enable devtmpfs (needed for udev -> touch support in weston)
# - change compression from CONFIG_KERNEL_LZMA=y to
#	CONFIG_KERNEL_GZIP=y (so it works with busybox)
# - disable proprietary graphics driver

_vendor=sony
_flavor=sony-castor-windy
_branch=next
_config="config-${_flavor}.armhf"

pkgname=linux-${_flavor}
pkgver=4.3
case $pkgver in
	*.*.*)  _kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=6
arch="armhf"
pkgdesc="Sony Xperia Z2 Tablet kernel"
url="https://github.com/andersson"
depends=""
makedepends="perl sed installkernel  bash gmp-dev bc linux-headers elfutils-dev gcc6"
options="!strip !check !tracedeps"
install=
source="
	$pkgname-$_branch.tar.gz::https://github.com/andersson/kernel/archive/${_branch}.tar.gz
	$_config
	mmc-wifi-fix.patch
	compiler-gcc6.h
"
subpackages=""
license="GPL2"

_abi_release=${pkgver}
_carch="arm"

# Compiler: this kernel was only tested with GCC6. Feel free to make a merge
# request if you find out that it is booting working with newer GCCs as
# well. See <https://postmarketos.org/vendorkernel> for instructions.
if [ "${CC:0:5}" != "gcc6-" ]; then
	CC="gcc6-$CC"
	HOSTCC="gcc6-gcc"
	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
fi

ksrcdir="$srcdir/kernel-${_branch}"

prepare() {
	local _patch_failed=
	cd "$ksrcdir"

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi

	# gcc6 support
	cp -v "$srcdir/compiler-gcc6.h" "$ksrcdir/include/linux/"

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config
	make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
		silentoldconfig
}

build() {
	cd "$srcdir"/build
	unset LDFLAGS

	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		CFLAGS_MODULE=-fno-pic
}

package() {
	cat "$srcdir/build/arch/arm/boot/zImage" \
	"$srcdir/build/arch/arm/boot/dts/qcom-msm8974-sony-xperia-castor.dtb" > \
	"$srcdir/build/arch/arm/boot/zImage-dtb"

	install -Dm644 "$srcdir/build/arch/arm/boot/zImage-dtb" \
		"$pkgdir/boot/vmlinuz-$_flavor"

	install -D "$srcdir/build/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"

	cd "$srcdir/build"
	make -j1 modules_install \
		ARCH="$_carch" \
		INSTALL_MOD_STRIP=1 \
		INSTALL_MOD_PATH="$pkgdir"
}

sha512sums="42e3d7ea75a2e69a7589e74409fe43f2abdee0f4cc1fcea1b138622e3845524145e4c41343abc57d71236b1e2f59715f719845fcf5e628a6c343e9b10d06942a  linux-sony-castor-windy-next.tar.gz
fd1df610c222a0be9aeddd43fd322a99c2344cd9ffb993483dba10c9d0c22596d01df5071b25c1dde5ee4dd5dc242adcfeb67d28274496d9a20bc571697945c6  config-sony-castor-windy.armhf
a13b17a151f732c2842df963019079cab07118fcdcdb2f2dfdfbd18571c7e2bd95a94734dc3a4eef1dae970e698f46047973efba6f355b26bf553fa6c2ac895d  mmc-wifi-fix.patch
d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h"