# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm64/configs/exynos8890-hero2lte_defconfig

pkgname="linux-samsung-herolte"
pkgver=3.18.133
pkgrel=1
pkgdesc="Samsung Galaxy S7 kernel fork"
arch="aarch64"
_carch="arm64"
_flavor="samsung-herolte"
url="https://kernel.org"
license="GPL-2.0-only"
options="!strip !check !tracedeps"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev dtbtool"

# Compiler: latest GCC from Alpine
HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

# Source - use Ivan Meler's 3.18 upstream kernel
_repository="android_kernel_samsung_herolte"
_commit="24b577569468748591f7be6435af67e17b532886"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/ivanmeler/${_repository}/archive/${_commit}.tar.gz
	$_config
	01-remove-android-defines.patch
	02-fix-dtbtool.patch
	03-fix-wifi-firmware-path.patch
"
builddir="$srcdir/${_repository}-${_commit}"

prepare() {
	default_prepare
	downstreamkernel_prepare "$srcdir" "$builddir" "$_config" "$_carch" "$HOSTCC"
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"
	# Note: the DTB for this kernel is built in tree, we just need to copy it.
}

package() {
	# kernel.release
	install -D "$builddir/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"

	# zImage (find the right one)
	cd "$builddir/arch/$_carch/boot"
	_target="$pkgdir/boot/vmlinuz-$_flavor"
	for _zimg in zImage-dtb Image.gz-dtb *zImage Image; do
		[ -e "$_zimg" ] || continue
		msg "zImage found: $_zimg"
		install -Dm644 "$_zimg" "$_target"
		break
	done
	if ! [ -e "$_target" ]; then
		error "Could not find zImage in $PWD!"
		return 1
	fi

	# Copy the in-tree DTBH block image
	install -Dm644 "$builddir/arch/arm64/boot/dtb.img" \
		"$pkgdir/boot/dt.img"
}

sha512sums="59c128754698259ad7f759def8a82b3f0756404bfe8b474df375c6af0a45b9875ba9a00acca5605b8dcebff4fa5ca1cd20d84d3f398999fe38c3f5837690848c  linux-samsung-herolte-24b577569468748591f7be6435af67e17b532886.tar.gz
59389d636795aca954dc5c263bbcb9c244309fab79f7088818a412b18e893526b5e13138db3b1ae35ea677c74d091e008ec8d057b0752894a620278e98d08c65  config-samsung-herolte.aarch64
66e27a174e12d56f5b77932985f0001b551c834d68b2a1bcc1d0b7d04e555757fc9137c182bd4cf5ffd57bf2cb0918d758dfe153a6140b77f02e7b9f33ecfb2c  01-remove-android-defines.patch
59b7151edece9fec879c12fe53fa4a7d34563c9b7ed45fa5e96036bde7616cac0976adeef54a5f36d883d51747831881b2586ac02ac47db4123c399cf98e93d8  02-fix-dtbtool.patch
ffef99094b44893d07aedf3bbf12b03f2c26fb93be4eb179ade9552ae82be6680daca06b6fc0f95064ef08fd94ef4a0b192a94f5065314a4608de8b8c413d86e  03-fix-wifi-firmware-path.patch"
