# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm64/configs/lineage-a5y17lte_defconfig

pkgname="linux-samsung-a5y17lte"
pkgver=3.18.14
pkgrel=1
pkgdesc="Samsung Galaxy A5 (2017) kernel fork"
arch="aarch64"
_carch="arm64"
_flavor="samsung-a5y17lte"
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-exynos"

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

# Source
_repository="android_kernel_samsung_universal7880"
_commit="9af43285ff43d74f3f40f910023e57dfad1c8e63"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/LineageOS/${_repository}/archive/${_commit}.tar.gz
	$_config
	fix_firmware_path.patch
	gcc7-give-up-on-ilog2-const-optimizations.patch
	gcc8-fix-put-user.patch
	0007-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch
	disable_knox.patch
"
builddir="$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"
	dtbTool-exynos --pagesize 2048 --platform 0x50a6 --subtype 0x217584da \
		-o "arch/arm64/boot/dtb.img" $(find "arch/arm64/boot/dts/" -name *a5y17lte*.dtb)
}

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

	# Master DTB (deviceinfo_bootimg_qcdt)
	install -Dm644 "$builddir/arch/arm64/boot/dtb.img" \
		"$pkgdir/boot/dt.img"
}

sha512sums="96794c6c5c91375a0110906c512644ccfb7c1d1f6e9275a0807e123bd8d02c93047856228298e38c9d24ddb663d58c33dbeaedb8f433cd54a07e4ae4e91ad243  linux-samsung-a5y17lte-9af43285ff43d74f3f40f910023e57dfad1c8e63.tar.gz
370d215158707ce674562a9d194c7827b1ba7adc808503ea60ace392a2bb3bf95e39828062947dd425a80041343cb12dd683e379dccbadfc88be94359065984b  config-samsung-a5y17lte.aarch64
9e2fb4b559936fdf77634ed7b3b85b2431b79ae9304f58c97172ba933bbfa365291650b20ddce41993526e39ca866049b765f730690f446ef047d86873a5f710  fix_firmware_path.patch
77eba606a71eafb36c32e9c5fe5e77f5e4746caac292440d9fb720763d766074a964db1c12bc76fe583c5d1a5c864219c59941f5e53adad182dbc70bf2bc14a7  gcc7-give-up-on-ilog2-const-optimizations.patch
197d40a214ada87fcb2dfc0ae4911704b9a93354b75179cd6b4aadbb627a37ec262cf516921c84a8b1806809b70a7b440cdc8310a4a55fca5d2c0baa988e3967  gcc8-fix-put-user.patch
b5f7aed0d4c78fcd9ea6f65e11606c4d33004b45eed39017baa8b0a78db801396aa04ba7cd3a4a669c23f878f5462ae1b5f753e0e26b65c9962fd1e98855e524  0007-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch
0ed3a870c33728b5337261770e8e8ea3d4135235339407d7e4d070d2f6aef5a866ad2012451b75aeeb813bd7d514c959d49d2f31a93ce95c0dbfc03275328a33  disable_knox.patch"