Add core/linux-rpi-16k

New kernel package providing 16k framesize for bcm2712/RPi5.  Very similar
to linux-rpi but built off bcm2712_defconfig.  Will work with Pi5 ONLY/will
not boot on lower models.

Since RPi Foundation has announced the 6.6 move[1] in the near future, just
start tracking that branch now.

1. https://forums.raspberrypi.com/viewtopic.php?t=361116

core/linux-rpi-16k/0001-Make-proc-cpuinfo-consistent-on-arm64-and-arm.patch

@@ -0,0 +1,29 @@
+From 988f69b247fa3a1b70876395342aeb8c7dc2e834 Mon Sep 17 00:00:00 2001
+From: graysky <graysky@archlinux.us>
+Date: Mon, 7 Dec 2020 13:03:40 -0500
+Subject: [PATCH] Make /proc/cpuinfo consistent on arm64 and arm
+
+Signed-off-by: graysky <graysky@archlinux.us>
+---
+ arch/arm64/kernel/cpuinfo.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
+index 721350d21074..88e2b8fcd7e6 100644
+--- a/arch/arm64/kernel/cpuinfo.c
++++ b/arch/arm64/kernel/cpuinfo.c
+@@ -153,9 +153,8 @@ static int c_show(struct seq_file *m, void *v)
+ 		 * "processor".  Give glibc what it expects.
+ 		 */
+ 		seq_printf(m, "processor\t: %d\n", i);
+-		if (compat)
+-			seq_printf(m, "model name\t: ARMv8 Processor rev %d (%s)\n",
+-				   MIDR_REVISION(midr), COMPAT_ELF_PLATFORM);
++		seq_printf(m, "model name\t: ARMv8 Processor rev %d (%s)\n",
++			   MIDR_REVISION(midr), COMPAT_ELF_PLATFORM);
+ 
+ 		seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ 			   loops_per_jiffy / (500000UL/HZ),
+-- 
+2.29.2
+

core/linux-rpi-16k/60-linux.hook

@@ -0,0 +1,11 @@
+[Trigger]
+Type = File
+Operation = Install
+Operation = Upgrade
+Operation = Remove
+Target = usr/lib/modules/%KERNVER%/*
+
+[Action]
+Description = Updating %PKGBASE% module dependencies...
+When = PostTransaction
+Exec = /usr/bin/depmod %KERNVER%

core/linux-rpi-16k/90-linux.hook

@@ -0,0 +1,13 @@
+[Trigger]
+Type = File
+Operation = Install
+Operation = Upgrade
+Target = boot/kernel.img
+Target = boot/kernel7.img
+Target = boot/kernel8.img
+Target = usr/lib/initcpio/*
+
+[Action]
+Description = Updating %PKGBASE% initcpios...
+When = PostTransaction
+Exec = /usr/bin/mkinitcpio -p %PKGBASE%

core/linux-rpi-16k/PKGBUILD

@@ -0,0 +1,259 @@
+# Maintainer: graysky <graysky@archlinux.us>
+# Maintainer: Kevin Mihelich <kevin@archlinuxarm.org>
+# Maintainer: Oleg Rakhmanov <oleg@archlinuxarm.org>
+# Maintainer: Dave Higham <pepedog@archlinuxarm.org>
+# Contributer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>
+
+pkgbase=linux-rpi-16k
+_commit=24ec6335f52e1fe3a895a1a2675200f452694923
+_srcname=linux-${_commit}
+_kernelname=${pkgbase#linux}
+_regen=
+pkgver=6.6.5
+pkgrel=1
+pkgdesc='Linux'
+url="https://github.com/raspberrypi/linux"
+arch=(aarch64)
+license=(GPL2)
+makedepends=(
+  bc
+  kmod
+  inetutils
+)
+options=('!strip')
+source=("linux-$pkgver-${_commit:0:10}.tar.gz::https://github.com/raspberrypi/linux/archive/${_commit}.tar.gz"
+        cmdline.txt
+        config.txt
+        config8
+        0001-Make-proc-cpuinfo-consistent-on-arm64-and-arm.patch
+        linux.preset
+        60-linux.hook
+        90-linux.hook
+        archarm.diffconfig
+)
+md5sums=('b04201ec76e17e06a0a8cd45bb3bfaf0'
+         '3bab7426d8c8818dda8353da3892a41f'
+         '16c484af9f72b9275afcf83a6b8eab36'
+         '4cbed2795359a053fce9098da15d4588'
+         'f66a7ea3feb708d398ef57e4da4815e9'
+         '86d4a35722b5410e3b29fc92dae15d4b'
+         '0a5f16bfec6ad982a2f6782724cca8ba'
+         '441ec084c47cddc53e592fb0cbce4edf'
+         'c8f84694321e249492c80149833671d7')
+
+# setup vars
+_kernel=kernel8.img KARCH=arm64 _image=Image _config=config8
+
+prepare() {
+  cd "${srcdir}/${_srcname}"
+
+  # consistent behavior of lscpu on arm/arm64
+  patch -p1 -i ../0001-Make-proc-cpuinfo-consistent-on-arm64-and-arm.patch
+
+  echo "Setting version..."
+  echo "-$pkgrel" > localversion.10-pkgrel
+  echo "${pkgbase#linux}" > localversion.20-pkgname
+
+  if [[ $_regen -eq 1 ]]; then
+    # useful on two point releases to keep shit straight
+    echo "Applying custom shit to bcm2712_defconfig"
+    make bcm2712_defconfig
+    cat ../archarm.diffconfig >> .config
+    make oldconfig
+    sed '/^CONFIG_LOCALVERSION=/s,.*$,CONFIG_LOCALVERSION="-ARCH",' .config >$startdir/newconfig.$_config
+    echo "verify that newconfig.$_config is fit for purpose then redefine $_config"
+    exit
+  else
+    make bcm2712_defconfig
+    make -s kernelrelease | sed 's/rpi-16k.*$/rpi-16k-ARCH/' > version
+    make mrproper
+    echo "Setting config..."
+    cp ../"$_config" .config
+    make olddefconfig
+    diff -u ../"$_config" .config || :
+    echo "Prepared $pkgbase version $(<version)"
+  fi
+}
+
+build() {
+  cd "${srcdir}/${_srcname}"
+
+  export KCFLAGS=' -mcpu=cortex-a76'
+  export KCPPFLAGS=' -mcpu=cortex-a76'
+
+  make "$_image" modules dtbs
+}
+
+_package() {
+  pkgdesc="RPi Foundation patched Linux kernel and modules with 16k pagesize for bcm2712/RPi5 ONLY"
+  depends=(
+    coreutils
+    firmware-raspberrypi
+    kmod
+    linux-firmware
+    'mkinitcpio>=0.7'
+  )
+  optdepends=(
+    'wireless-regdb: to set the correct wireless channels of your country'
+  )
+  provides=(
+    linux="${pkgver}"
+    WIREGUARD-MODULE
+  )
+  conflicts=(
+    linux
+    linux-rpi
+    uboot-raspberrypi
+  )
+  install=${pkgname}.install
+  backup=(
+    boot/config.txt
+    boot/cmdline.txt
+  )
+
+  cd "${srcdir}/${_srcname}"
+  local modulesdir="$pkgdir/usr/lib/modules/$(<version)"
+
+  # Used by mkinitcpio to name the kernel
+  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"
+
+  echo "Installing modules..."
+  make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
+    DEPMOD=/doesnt/exist modules_install  # Suppress depmod
+
+  # remove build link
+  rm -f "$modulesdir"/build
+
+  echo "Installing Arch ARM specific stuff..."
+  mkdir -p "${pkgdir}"/boot
+  make INSTALL_DTBS_PATH="${pkgdir}/boot" dtbs_install
+
+  if [[ $CARCH == "aarch64" ]]; then
+    # drop hard-coded devicetree=foo.dtb in /boot/config.txt for
+    # autodetected load of supported of models at boot
+    find "${pkgdir}/boot/broadcom" -type f -print0 | xargs -0 mv -t "${pkgdir}/boot"
+    rmdir "${pkgdir}/boot/broadcom"
+  fi
+
+  # remove unneeded dtb files since this package is only for RPi5
+  for i in bcm2837 bcm2711 bcm2710; do
+    rm "${pkgdir}/boot/$i"*.dtb
+  done
+
+  cp arch/$KARCH/boot/$_image "${pkgdir}/boot/$_kernel"
+  cp arch/$KARCH/boot/dts/overlays/README "${pkgdir}/boot/overlays"
+  install -m644 ../config.txt "${pkgdir}/boot/config.txt"
+  install -m644 ../cmdline.txt "${pkgdir}/boot"
+
+  # sed expression for following substitutions
+  local _subst="
+    s|%PKGBASE%|${pkgbase}|g
+    s|%KERNVER%|$(<version)|g
+  "
+
+  # install mkinitcpio preset file
+  sed "${_subst}" ../linux.preset |
+    install -Dm644 /dev/stdin "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
+
+  # install pacman hooks
+  sed "${_subst}" ../60-linux.hook |
+    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/60-${pkgbase}.hook"
+  sed "${_subst}" ../90-linux.hook |
+    install -Dm644 /dev/stdin "${pkgdir}/usr/share/libalpm/hooks/90-${pkgbase}.hook"
+}
+
+_package-headers() {
+  pkgdesc="RPi Foundation header and scripts for building modules for Linux kernel"
+  provides=("linux-headers=${pkgver}")
+  conflicts=('linux-headers' 'linux-rpi-headers')
+
+  cd ${_srcname}
+  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
+
+  echo "Installing build files..."
+  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
+    localversion.* version
+  install -Dt "$builddir/kernel" -m644 kernel/Makefile
+  install -Dt "$builddir/arch/$KARCH" -m644 "arch/$KARCH/Makefile"
+  cp -t "$builddir" -a scripts
+
+  # add xfs and shmem for aufs building
+  mkdir -p "$builddir"/{fs/xfs,mm}
+
+  echo "Installing headers..."
+  cp -t "$builddir" -a include
+  cp -t "$builddir/arch/$KARCH" -a "arch/$KARCH/include"
+  install -Dt "$builddir/arch/$KARCH/kernel" -m644 "arch/$KARCH/kernel/asm-offsets.s"
+
+  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
+  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h
+
+  # https://bugs.archlinux.org/task/13146
+  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h
+
+  # https://bugs.archlinux.org/task/20402
+  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
+  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
+  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h
+
+  # https://bugs.archlinux.org/task/71392
+  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h
+
+  echo "Installing KConfig files..."
+  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;
+
+  echo "Removing unneeded architectures..."
+  local _arch
+  for _arch in "$builddir"/arch/*/; do
+    if [[ $CARCH == "aarch64" ]]; then
+      [[ $_arch = */"$KARCH"/ || $_arch == */arm/ ]] && continue
+    else
+      [[ $_arch = */"$KARCH"/ ]] && continue
+    fi
+    echo "Removing $(basename "$_arch")"
+    rm -r "$_arch"
+  done
+
+  echo "Symlinking common aliases..."
+  # https://archlinuxarm.org/forum/viewtopic.php?f=60&t=16354
+  ln -sr arm "$builddir/arch/armv7h"
+  ln -sr arm "$builddir/arch/armv7l"
+  ln -sr arm64 "$builddir/arch/aarch64"
+
+  echo "Removing documentation..."
+  rm -r "$builddir/Documentation"
+
+  echo "Removing broken symlinks..."
+  find -L "$builddir" -type l -printf 'Removing %P\n' -delete
+
+  echo "Removing loose objects..."
+  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete
+
+  echo "Stripping build tools..."
+  local file
+  while read -rd '' file; do
+    case "$(file -Sib "$file")" in
+      application/x-sharedlib\;*)      # Libraries (.so)
+        strip -v $STRIP_SHARED "$file" ;;
+      application/x-archive\;*)        # Libraries (.a)
+        strip -v $STRIP_STATIC "$file" ;;
+      application/x-executable\;*)     # Binaries
+        strip -v $STRIP_BINARIES "$file" ;;
+      application/x-pie-executable\;*) # Relocatable binaries
+        strip -v $STRIP_SHARED "$file" ;;
+    esac
+  done < <(find "$builddir" -type f -perm -u+x -print0)
+
+  echo "Adding symlink..."
+  mkdir -p "$pkgdir/usr/src"
+  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
+}
+
+pkgname=("${pkgbase}" "${pkgbase}-headers")
+for _p in ${pkgname[@]}; do
+  eval "package_${_p}() {
+    _package${_p#${pkgbase}}
+  }"
+done
+
+# vim:set ts=8 sts=2 sw=2 et:

core/linux-rpi-16k/archarm.diffconfig

@@ -0,0 +1,173 @@
+CONFIG_TASK_DELAY_ACCT=y
+# CONFIG_PSI_DEFAULT_DISABLED is not set
+CONFIG_IKCONFIG=y
+CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_MEMCG_SWAP=y
+CONFIG_NR_CPUS=4
+CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y
+# CONFIG_MODVERSIONS is not set
+# CONFIG_MODULE_SRCVERSION_ALL is not set
+CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_PACKET_DIAG=m
+CONFIG_KSM=y
+CONFIG_ARCH_SUPPORTS_ACPI=y
+CONFIG_DMIID=y
+CONFIG_UNIX_DIAG=m
+CONFIG_INET_UDP_DIAG=m
+CONFIG_F2FS_FS_COMPRESSION=y
+CONFIG_F2FS_FS_LZO=y
+CONFIG_F2FS_FS_LZORLE=y
+CONFIG_F2FS_FS_LZ4=y
+CONFIG_F2FS_FS_LZ4HC=y
+CONFIG_F2FS_FS_ZSTD=y
+CONFIG_EXPORTFS_BLOCK_OPS=y
+CONFIG_FS_VERITY=y
+CONFIG_SQUASHFS_LZ4=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_MEMCG_SWAP=y
+CONFIG_BSD_DISKLABEL=y
+CONFIG_MINIX_SUBPARTITION=y
+CONFIG_SOLARIS_X86_PARTITION=y
+CONFIG_UNIXWARE_DISKLABEL=y
+CONFIG_PADATA=y
+CONFIG_KSM=y
+CONFIG_XFRM_MIGRATE=y
+CONFIG_NET_KEY_MIGRATE=y
+CONFIG_TCP_CONG_HSTCP=m
+CONFIG_TCP_CONG_HYBLA=m
+CONFIG_TCP_CONG_VEGAS=m
+CONFIG_TCP_CONG_NV=m
+CONFIG_TCP_CONG_SCALABLE=m
+CONFIG_TCP_CONG_LP=m
+CONFIG_TCP_CONG_VENO=m
+CONFIG_TCP_CONG_YEAH=m
+CONFIG_TCP_CONG_ILLINOIS=m
+CONFIG_TCP_CONG_DCTCP=m
+CONFIG_TCP_CONG_CDG=m
+CONFIG_TCP_MD5SIG=y
+CONFIG_IPV6_OPTIMISTIC_DAD=y
+CONFIG_NFT_BRIDGE_META=m
+CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_MRP=m
+CONFIG_HSR=m
+CONFIG_BPF_STREAM_PARSER=y
+CONFIG_NLMON=m
+CONFIG_IGC=m
+CONFIG_MVMDIO=m
+CONFIG_WIZNET_W5300=m
+CONFIG_BCM87XX_PHY=m
+CONFIG_CAN_8DEV_USB=m
+CONFIG_CAN_KVASER_USB=m
+CONFIG_DRM_PL111=m
+CONFIG_USB_SERIAL_SIMPLE=m
+CONFIG_USB_SERIAL_MXUPORT=m
+CONFIG_USB_CHAOSKEY=m
+CONFIG_USB_F_TCM=m
+CONFIG_USB_CONFIGFS_F_TCM=y
+CONFIG_RTC_DRV_RX6110=m
+
+CONFIG_IOSCHED_BFQ=y
+CONFIG_CLEANCACHE=y
+CONFIG_ZSWAP=y
+CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZO=y
+CONFIG_ZSWAP_COMPRESSOR_DEFAULT="lzo"
+CONFIG_AT803X_PHY=m
+CONFIG_MICREL_KS8995MA=m
+CONFIG_USB_NET_CH9200=m
+CONFIG_WCN36XX=m
+CONFIG_ATH10K=m
+CONFIG_IWLWIFI=m
+CONFIG_JOYSTICK_ANALOG=m
+CONFIG_JOYSTICK_A3D=m
+CONFIG_JOYSTICK_ADI=m
+CONFIG_JOYSTICK_COBRA=m
+CONFIG_JOYSTICK_GF2K=m
+CONFIG_JOYSTICK_GRIP=m
+CONFIG_JOYSTICK_GRIP_MP=m
+CONFIG_JOYSTICK_GUILLEMOT=m
+CONFIG_JOYSTICK_INTERACT=m
+CONFIG_JOYSTICK_SIDEWINDER=m
+CONFIG_JOYSTICK_TMDC=m
+CONFIG_JOYSTICK_IFORCE_232=m
+CONFIG_JOYSTICK_WARRIOR=m
+CONFIG_JOYSTICK_MAGELLAN=m
+CONFIG_JOYSTICK_SPACEORB=m
+CONFIG_JOYSTICK_SPACEBALL=m
+CONFIG_JOYSTICK_STINGER=m
+CONFIG_JOYSTICK_TWIDJOY=m
+CONFIG_JOYSTICK_ZHENHUA=m
+CONFIG_JOYSTICK_AS5011=m
+CONFIG_JOYSTICK_JOYDUMP=m
+CONFIG_TOUCHSCREEN_AD7877=m
+CONFIG_TOUCHSCREEN_AD7879=m
+CONFIG_TOUCHSCREEN_AD7879_I2C=m
+CONFIG_TOUCHSCREEN_AD7879_SPI=m
+CONFIG_TOUCHSCREEN_AR1021_I2C=m
+CONFIG_TOUCHSCREEN_ATMEL_MXT=m
+CONFIG_TOUCHSCREEN_AUO_PIXCIR=m
+CONFIG_TOUCHSCREEN_BU21013=m
+CONFIG_TOUCHSCREEN_CHIPONE_ICN8318=m
+CONFIG_TOUCHSCREEN_CY8CTMG110=m
+CONFIG_TOUCHSCREEN_CYTTSP_CORE=m
+CONFIG_TOUCHSCREEN_CYTTSP_I2C=m
+CONFIG_TOUCHSCREEN_CYTTSP_SPI=m
+CONFIG_TOUCHSCREEN_CYTTSP4_CORE=m
+CONFIG_TOUCHSCREEN_CYTTSP4_I2C=m
+CONFIG_TOUCHSCREEN_CYTTSP4_SPI=m
+CONFIG_TOUCHSCREEN_DYNAPRO=m
+CONFIG_TOUCHSCREEN_HAMPSHIRE=m
+CONFIG_TOUCHSCREEN_EETI=m
+CONFIG_TOUCHSCREEN_EGALAX_SERIAL=m
+CONFIG_TOUCHSCREEN_FUJITSU=m
+CONFIG_TOUCHSCREEN_GUNZE=m
+CONFIG_TOUCHSCREEN_EKTF2127=m
+CONFIG_TOUCHSCREEN_ELAN=m
+CONFIG_TOUCHSCREEN_ELO=m
+CONFIG_TOUCHSCREEN_WACOM_W8001=m
+CONFIG_TOUCHSCREEN_WACOM_I2C=m
+CONFIG_TOUCHSCREEN_MAX11801=m
+CONFIG_TOUCHSCREEN_MCS5000=m
+CONFIG_TOUCHSCREEN_MMS114=m
+CONFIG_TOUCHSCREEN_MELFAS_MIP4=m
+CONFIG_TOUCHSCREEN_INEXIO=m
+CONFIG_TOUCHSCREEN_MK712=m
+CONFIG_TOUCHSCREEN_PENMOUNT=m
+CONFIG_TOUCHSCREEN_TOUCHRIGHT=m
+CONFIG_TOUCHSCREEN_TOUCHWIN=m
+CONFIG_TOUCHSCREEN_PIXCIR=m
+CONFIG_TOUCHSCREEN_WDT87XX_I2C=m
+CONFIG_TOUCHSCREEN_TOUCHIT213=m
+CONFIG_TOUCHSCREEN_TSC_SERIO=m
+CONFIG_TOUCHSCREEN_TSC200X_CORE=m
+CONFIG_TOUCHSCREEN_TSC2004=m
+CONFIG_TOUCHSCREEN_TSC2005=m
+CONFIG_TOUCHSCREEN_TSC2007=m
+CONFIG_TOUCHSCREEN_RM_TS=m
+CONFIG_TOUCHSCREEN_SILEAD=m
+CONFIG_TOUCHSCREEN_SIS_I2C=m
+CONFIG_TOUCHSCREEN_ST1232=m
+CONFIG_TOUCHSCREEN_SX8654=m
+CONFIG_TOUCHSCREEN_TPS6507X=m
+CONFIG_TOUCHSCREEN_ZFORCE=m
+CONFIG_TOUCHSCREEN_ROHM_BU21023=m
+CONFIG_SENSORS_DS620=m
+CONFIG_SENSORS_HIH6130=m
+CONFIG_SENSORS_LTC2945=m
+CONFIG_SENSORS_LTC4222=m
+CONFIG_USB_AIRSPY=m
+CONFIG_USB_HACKRF=m
+CONFIG_USB_MSI2500=m
+CONFIG_RADIO_ADAPTERS=y
+CONFIG_RADIO_TEA575X=m
+CONFIG_RADIO_SI470X=m
+CONFIG_USB_SI470X=m
+CONFIG_USB_MR800=m
+CONFIG_USB_DSBR=m
+CONFIG_USB_RAREMONO=m
+CONFIG_LCD_CLASS_DEVICE=m
+CONFIG_BTRFS_FS=y
+CONFIG_QUOTA_NETLINK_INTERFACE=y
+CONFIG_QUOTA_TREE=y
+CONFIG_QFMT_V1=y
+CONFIG_QFMT_V2=y
+CONFIG_BLK_DEV_RBD=m

core/linux-rpi-16k/cmdline.txt

@@ -0,0 +1 @@
+root=/dev/mmcblk0p2 rw rootwait console=serial0,115200 console=tty1 fsck.repair=yes

core/linux-rpi-16k/config.txt

@@ -0,0 +1,44 @@
+# For more options and information see:
+# http://rptl.io/configtxt
+
+initramfs initramfs-linux.img followkernel
+
+# Uncomment some or all of these to enable the optional hardware interfaces
+#dtparam=i2c_arm=on
+#dtparam=i2s=on
+#dtparam=spi=on
+
+# Additional overlays and parameters are documented
+# /boot/firmware/overlays/README
+
+# Automatically load overlays for detected cameras
+camera_auto_detect=1
+
+# Automatically load overlays for detected DSI displays
+display_auto_detect=1
+
+# Enable DRM VC4 V3D driver
+dtoverlay=vc4-kms-v3d
+max_framebuffers=2
+
+# Uncomment if hdmi display is not detected and composite is being output
+#hdmi_force_hotplug=1
+
+# Uncomment if you want to disable wifi or bluetooth respectively
+#dtoverlay=disable-wifi
+#dtoverlay=disable-bt
+
+# Uncomment this to enable infrared communication.
+#dtoverlay=gpio-ir,gpio_pin=17
+#dtoverlay=gpio-ir-tx,gpio_pin=18
+
+# Run as fast as firmware / board allows
+arm_boost=1
+
+[cm4]
+# Enable host mode on the 2711 built-in XHCI USB controller.
+# This line should be removed if the legacy DWC2 controller is required
+# (e.g. for USB device mode) or if USB support is not required.
+otg_mode=1
+
+[all]

core/linux-rpi-16k/linux-rpi-16k.install

@@ -0,0 +1,53 @@
+disable_cma() {
+  if [[ -f /boot/config.txt && $(grep '^cma' /boot/config.txt) != '' ]]; then
+    echo ">>> You appear to have dynamic memory (CMA) enabled, which is currently broken"
+    echo ">>>   in newer kernels and will cause many issues if left enabled."
+    echo ">>> Disabling that for you now."
+    sed -i 's/^cma_/#cma_/g' /boot/config.txt
+  fi
+}
+
+correct_fstab() {
+  # starting with v5.10.y, fstab requires a padded zero in the path to /boot
+  if [[ -f /etc/fstab ]]; then
+    if grep -q mmcblk1p1 /etc/fstab; then
+      sed -i 's/mmcblk1p1/mmcblk0p1/' /etc/fstab
+    fi
+  fi
+}
+
+post_install () {
+  disable_cma
+
+  # coming from linux-aarch64 also needs a padded zero in the path to /boot
+  correct_fstab
+}
+
+post_upgrade() {
+  if grep "^[^#]*[[:space:]]/boot" etc/fstab 2>&1 >/dev/null; then
+    if ! grep "[[:space:]]/boot" etc/mtab 2>&1 >/dev/null; then
+      echo "WARNING: /boot appears to be a separate partition but is not mounted."
+      echo "         You probably just broke your system. Congratulations."
+    fi
+  fi
+
+  disable_cma
+
+  if [ "$(vercmp $2 3.18.3)" -lt 0 ]; then
+    echo "________________________________________________________________________________"
+    echo ""
+    echo "WARNING: This kernel provides updated config.txt and cmdline.txt files."
+    echo "         Check for pacnew files in /boot and merge or replace the existing files"
+    echo "         with the new versions."
+    echo "________________________________________________________________________________"
+    echo ""
+  fi
+
+  if [ "$(vercmp $2 5.10.0)" -lt 0 ]; then
+    correct_fstab
+  fi
+}
+
+post_remove() {
+  rm -f boot/initramfs-linux.img
+}

core/linux-rpi-16k/linux.preset

@@ -0,0 +1,10 @@
+# mkinitcpio preset file for the '%PKGBASE%' package
+
+ALL_config="/etc/mkinitcpio.conf"
+ALL_kver="%KERNVER%"
+
+PRESETS=('default')
+
+#default_config="/etc/mkinitcpio.conf"
+default_image="/boot/initramfs-linux.img"
+#default_options=""