From b5db9ad07cd5ad9c8edc7d1db69d31d6bcf50c59 Mon Sep 17 00:00:00 2001
From: Markus Fritsche <mfritsche@reauktion.de>
Date: Sat, 9 May 2026 15:27:06 +0000
Subject: [PATCH] linux-fresnel-fourier: bootstrap PKGBUILD

---
 arch/linux-fresnel-fourier/PKGBUILD | 127 ++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 arch/linux-fresnel-fourier/PKGBUILD

diff --git a/arch/linux-fresnel-fourier/PKGBUILD b/arch/linux-fresnel-fourier/PKGBUILD
new file mode 100644
index 000000000..66382d005
--- /dev/null
+++ b/arch/linux-fresnel-fourier/PKGBUILD
@@ -0,0 +1,127 @@
+# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
+#
+# linux-fresnel-fourier — overclocked + DTS-tweaked Pinebook Pro kernel
+# baselined on mmind/linux-rockchip v7.0.
+#
+# Coexists with linux-eos-arm; ships its own /boot/{Image,dtbs}-fresnel-fourier
+# paths. Extlinux entry adds itself as a parallel boot option; user picks at
+# u-boot menu. Reverting = boot the linux-eos-arm entry.
+
+pkgbase=linux-fresnel-fourier
+pkgname=("$pkgbase" "$pkgbase-headers")
+pkgver=7.0
+pkgrel=1
+pkgdesc='Pinebook Pro kernel (mmind/linux-rockchip v7.0 + OC OPP + PBP DTS tweaks)'
+arch=(aarch64)
+url='https://git.reauktion.de/marfrit/kernel-agent'
+license=(GPL-2.0-only)
+makedepends=(
+  bc cpio gettext kmod libelf pahole perl python tar xz
+  distcc ccache
+  uboot-tools dtc
+)
+options=('!strip')
+source=(
+  "https://git.kernel.org/torvalds/t/linux-${pkgver}.tar.gz"
+  '0001-arm64-dts-rk3399-pinebook-pro-add-OC-OPP-tables-1704-2184.patch'
+  '0002-arm64-dts-rk3399-pinebook-pro-enable-hdmi-sound.patch'
+  '0003-arm64-dts-rk3399-pinebook-pro-spi1-max-freq-10MHz.patch'
+  'config'  # snapshot of fresnel /usr/lib/modules/6.19.10-1-eos-arm/build/.config
+  'linux-fresnel-fourier.preset'
+  'extlinux-add.hook'
+  'extlinux-add.sh'
+)
+sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')
+
+_kernver=${pkgver}.0-fresnel-fourier
+_srcdir=linux-${pkgver}
+
+prepare() {
+  cd "${_srcdir}"
+
+  echo ":: applying patches"
+  for p in "${srcdir}"/*.patch; do
+    echo "   $(basename "$p")"
+    patch -Np1 -i "$p"
+  done
+
+  echo ":: writing config"
+  cp "${srcdir}/config" .config
+
+  # Force EXTRAVERSION suffix so the kernel version string and module dir
+  # become ${_kernver} — keeps them disjoint from linux-eos-arm.
+  scripts/config --set-str LOCALVERSION "-fresnel-fourier"
+  scripts/config -d LOCALVERSION_AUTO
+
+  echo ":: olddefconfig (accept new symbols sensibly)"
+  make olddefconfig
+
+  make -s kernelrelease > version
+  echo ":: kernel release: $(<version)"
+}
+
+build() {
+  cd "${_srcdir}"
+  unset LDFLAGS
+  export DISTCC_HOSTS="localhost/8 tesla:3632/4,lzo,cpp dcc1.local:3632/4,lzo,cpp dcc2.local:3632/4,lzo,cpp"
+  export CC="ccache distcc gcc"
+  export HOSTCC="ccache gcc"
+  make ${MAKEFLAGS:--j16} Image modules dtbs
+}
+
+_package() {
+  pkgdesc='Pinebook Pro overclocked kernel (fresnel-fourier baseline)'
+  depends=(coreutils kmod mkinitcpio uboot-tools)
+  optdepends=('linux-firmware: firmware images needed for some devices')
+  backup=("etc/mkinitcpio.d/${pkgbase}.preset")
+
+  cd "${_srcdir}"
+  local _kver
+  _kver=$(<version)
+
+  install -Dm644 arch/arm64/boot/Image \
+    "${pkgdir}/boot/Image-fresnel-fourier"
+
+  # DTBs into a private tree to avoid clobbering linux-eos-arm
+  install -d "${pkgdir}/boot/dtbs-fresnel-fourier/rockchip"
+  cp -a arch/arm64/boot/dts/rockchip/*.dtb \
+    "${pkgdir}/boot/dtbs-fresnel-fourier/rockchip/"
+
+  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="${pkgdir}/usr" \
+    INSTALL_MOD_STRIP=1 modules_install
+  rm -f "${pkgdir}/usr/lib/modules/${_kver}/"{source,build}
+
+  install -Dm644 "${srcdir}/${pkgbase}.preset" \
+    "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
+
+  install -Dm755 "${srcdir}/extlinux-add.hook" \
+    "${pkgdir}/usr/share/libalpm/hooks/95-${pkgbase}-extlinux.hook"
+  install -Dm755 "${srcdir}/extlinux-add.sh" \
+    "${pkgdir}/usr/share/libalpm/scripts/${pkgbase}-extlinux"
+}
+
+_package-headers() {
+  pkgdesc='Headers and scripts for the linux-fresnel-fourier kernel'
+  depends=(pahole)
+
+  cd "${_srcdir}"
+  local _kver _builddir
+  _kver=$(<version)
+  _builddir="${pkgdir}/usr/lib/modules/${_kver}/build"
+
+  install -Dt "${_builddir}" -m644 .config Makefile Module.symvers System.map vmlinux version
+  install -Dt "${_builddir}/kernel" -m644 kernel/Makefile
+
+  cp -a scripts "${_builddir}"
+  install -Dt "${_builddir}/arch/arm64" -m644 arch/arm64/Makefile
+  cp -a arch/arm64/include "${_builddir}/arch/arm64/"
+  cp -a include "${_builddir}/"
+
+  find . -name 'Kbuild' -exec install -Dm644 {} "${_builddir}/{}" \;
+  find . -name 'Kconfig*' -exec install -Dm644 {} "${_builddir}/{}" \;
+
+  ln -sr "${_builddir}" "${pkgdir}/usr/src/${pkgbase}"
+}
+
+eval "package_${pkgbase}() { _package; }"
+eval "package_${pkgbase}-headers() { _package-headers; }"