Adds Asus Z00T kernel

2024-12-28 10:26:55 +03:00 · 2018-06-10 00:57:12 +00:00 · 2018-06-10 00:57:12 +00:00 · 2bd88ab30e
commit 2bd88ab30e
parent 81ce8dd965
15 changed files with 4800 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+*.swp
--- a/overlay/asus-z00t/01_fix_gcc6_errors.patch
+++ b/overlay/asus-z00t/01_fix_gcc6_errors.patch
@ -0,0 +1,68 @@
+From 44f841be2a223d672eaf9fa3029fd9249aeca583 Mon Sep 17 00:00:00 2001
+From: MOVZX <movzx@yahoo.com>
+Date: Tue, 25 Apr 2017 17:04:40 +0300
+Subject: [PATCH] prima: Fix GCC6 Warnings
+
+Signed-off-by: MOVZX <movzx@yahoo.com>
+---
+ drivers/staging/prima/CORE/MAC/src/include/utilsApi.h          | 2 +-
+ drivers/staging/prima/CORE/MAC/src/pe/sch/schBeaconGen.c       | 2 +-
+ drivers/staging/prima/CORE/SME/src/csr/csrApiScan.c            | 2 +-
+ drivers/staging/prima/CORE/VOSS/src/wlan_nv_template_builtin.c | 5 ++---
+ 4 files changed, 5 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/staging/prima/CORE/MAC/src/include/utilsApi.h b/drivers/staging/prima/CORE/MAC/src/include/utilsApi.h
+index 3a175473378..798a05cd2b4 100644
+--- a/drivers/staging/prima/CORE/MAC/src/include/utilsApi.h
+++ b/drivers/staging/prima/CORE/MAC/src/include/utilsApi.h
+@@ -705,7 +705,7 @@ halRoundS32(tANI_S32 p)
+     else
+         k = p;
+ 
+-        return(k);
+    return(k);
+ }
+ 
+ // New functions for endianess conversion
+diff --git a/drivers/staging/prima/CORE/MAC/src/pe/sch/schBeaconGen.c b/drivers/staging/prima/CORE/MAC/src/pe/sch/schBeaconGen.c
+index 0fc798995ae..6427a04e108 100644
+--- a/drivers/staging/prima/CORE/MAC/src/pe/sch/schBeaconGen.c
+++ b/drivers/staging/prima/CORE/MAC/src/pe/sch/schBeaconGen.c
+@@ -60,7 +60,7 @@
+ // Temporarily (maybe for all of Alpha-1), assuming TIM = 0
+ //
+ 
+-const tANI_U8 P2pOui[] = {0x50, 0x6F, 0x9A, 0x9};
+tANI_U8 P2pOui[] = {0x50, 0x6F, 0x9A, 0x9};
+ 
+ 
+ tSirRetStatus schGetP2pIeOffset(tANI_U8 *pExtraIe, tANI_U32 extraIeLen, tANI_U16 *pP2pIeOffset)
+diff --git a/drivers/staging/prima/CORE/SME/src/csr/csrApiScan.c b/drivers/staging/prima/CORE/SME/src/csr/csrApiScan.c
+index 23ab858c355..b4f26def1d1 100644
+--- a/drivers/staging/prima/CORE/SME/src/csr/csrApiScan.c
+++ b/drivers/staging/prima/CORE/SME/src/csr/csrApiScan.c
+@@ -5698,7 +5698,7 @@ static tANI_BOOLEAN csrScanProcessScanResults( tpAniSirGlobal pMac, tSmeCmd *pCo
+         if (eHAL_STATUS_SUCCESS != status)
+             smsLog(pMac, LOGE,
+                    FL( "failed to update the supported channel list"));
+-            pMac->scan.defer_update_channel_list = false;
+        pMac->scan.defer_update_channel_list = false;
+     }
+ 
+ #ifdef WLAN_AP_STA_CONCURRENCY
+diff --git a/drivers/staging/prima/CORE/VOSS/src/wlan_nv_template_builtin.c b/drivers/staging/prima/CORE/VOSS/src/wlan_nv_template_builtin.c
+index 14c6eadf524..e26b697f793 100644
+--- a/drivers/staging/prima/CORE/VOSS/src/wlan_nv_template_builtin.c
+++ b/drivers/staging/prima/CORE/VOSS/src/wlan_nv_template_builtin.c
+@@ -587,9 +587,8 @@ _NV_TEMPLATE_TABLE NvTablesBuiltIn[/*TABLES_MAX*/][TABLE_ENTRIES_MAX] = {
+          ((char *)&(nvDefaults.tables.hwCalValues.calData.psSlpTimeOvrHdxLNA5G) -
+           (char *)&nvDefaults.tables.hwCalValues.calData),"psSlpTimeOvrHdxLNA5G"},
+       {"ed",_ID_U8,SINGULAR,0,0,0,
+-         (((char *)&(nvDefaults.tables.hwCalValues.calData.psSlpTimeOvrHdxLNA5G) +
+-          sizeof(uint16)) - (char *)&nvDefaults.tables.hwCalValues.calData),
+-         "nv_TxBBFSel9MHz"},
+         ((char *)&(nvDefaults.tables.hwCalValues.calData.psSlpTimeOvrHdxLNA5G) -
+          (char *)&nvDefaults.tables.hwCalValues.calData),"nv_TxBBFSel9MHz"},
+       {"ee",_ID_U8,SINGULAR,0,0,0,
+          ((char *)&(nvDefaults.tables.hwCalValues.calData.hwParam2) -
+           (char *)&nvDefaults.tables.hwCalValues.calData),"hwParam2"},
--- a/overlay/asus-z00t/02_mdss_fb_refresh_rate.patch
+++ b/overlay/asus-z00t/02_mdss_fb_refresh_rate.patch
@ -0,0 +1,13 @@
+diff --git a/drivers/video/msm/mdss/mdss_fb.c b/drivers/video/msm/mdss/mdss_fb.c
+index b37fd1e07ac1..1f091a261d22 100644
+--- a/drivers/video/msm/mdss/mdss_fb.c
+++ b/drivers/video/msm/mdss/mdss_fb.c
+@@ -2668,7 +2668,7 @@ static int mdss_fb_register(struct msm_fb_data_type *mfd)
+ 	var->left_margin = panel_info->lcdc.h_back_porch;
+ 	var->right_margin = panel_info->lcdc.h_front_porch;
+ 	var->hsync_len = panel_info->lcdc.h_pulse_width;
+-	var->pixclock = panel_info->clk_rate / 1000;
+	var->pixclock = 1000000 / 60;
+ 
+ 	/*
+ 	 * Store the cont splash state in the var reserved[3] field.
--- a/overlay/asus-z00t/05_dtb-fix.patch
+++ b/overlay/asus-z00t/05_dtb-fix.patch
@ -0,0 +1,52 @@
+From e4e4f1f704b97a57edbbe471962729e2efd04fd6 Mon Sep 17 00:00:00 2001
+From: rishabhrao <admin@rishabhrao.net>
+Date: Sun, 5 Feb 2017 07:44:00 +0000
+Subject: [PATCH] s2: Fix Kernel Standalone Building Errors
+
+Change-Id: Ia54b1b5e3ba950a8ac0db689275dd760455cdfad
+Signed-off-by: rishabhrao <admin@rishabhrao.net>
+---
+ arch/arm64/Makefile      | 7 ++++---
+ arch/arm64/boot/Makefile | 2 +-
+ 2 files changed, 5 insertions(+), 4 deletions(-)
+
+diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
+index 153e8545587..bdc365eb4d6 100644
+--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
+@@ -61,6 +61,7 @@ KBUILD_DTBS	:= dtbs
+ 
+ all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)
+ 
+boot32 := arch/arm/boot
+ boot := arch/arm64/boot
+ 
+ Image Image.gz: vmlinux
+@@ -70,11 +71,11 @@ zinstall install: vmlinux
+ 	$(Q)$(MAKE) $(build)=$(boot) $@
+ 
+ %.dtb: scripts
+-	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
+	$(Q)$(MAKE) $(build)=$(boot32)/dts $(boot32)/dts/$@
+ 
+ dtbs: scripts
+-	$(Q)$(MAKE) $(build)=$(boot)/dts dtbs
+-	$(Q)$(MAKE) $(build)=$(boot)/dts/qcom dtbs
+	$(Q)$(MAKE) $(build)=$(boot32)/dts dtbs
+	$(Q)$(MAKE) $(build)=$(boot32)/dts/qcom dtbs
+ 
+ PHONY += vdso_install
+ vdso_install:
+diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
+index ad85404a64d..b49defdf14a 100644
+--- a/arch/arm64/boot/Makefile
+++ b/arch/arm64/boot/Makefile
+@@ -24,7 +24,7 @@ DTB_LIST := $(addsuffix .dtb,$(DTB_NAMES))
+ else
+ DTB_LIST := $(dtb-y)
+ endif
+-DTB_OBJS := $(addprefix $(obj)/dts/,$(DTB_LIST))
+DTB_OBJS := $(addprefix $(srctree)/arch/arm/boot/dts/,$(DTB_LIST))
+ 
+ $(obj)/Image: vmlinux FORCE
+ 	$(call if_changed,objcopy)
--- a/overlay/asus-z00t/90_dtbs-install.patch
+++ b/overlay/asus-z00t/90_dtbs-install.patch
@ -0,0 +1,77 @@
+diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
+index 644ef3ed222..dd1c141c36a 100644
+--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
+@@ -76,6 +76,9 @@ dtbs: scripts
+ 	$(Q)$(MAKE) $(build)=$(boot)/dts dtbs
+ 	$(Q)$(MAKE) $(build)=$(boot)/dts/qcom dtbs
+ 
+dtbs_install:
+	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
+
+ PHONY += vdso_install
+ vdso_install:
+ 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
+diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
+index 547e15daf03..8606bf2685c 100644
+--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
+@@ -169,6 +169,12 @@ build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
+ # $(Q)$(MAKE) $(modbuiltin)=dir
+ modbuiltin := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.modbuiltin obj
+ 
+###
+# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
+# Usage:
+# $(Q)$(MAKE) $(dtbinst)=dir
+dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
+
+ # Prefix -I with $(srctree) if it is not an absolute path.
+ # skip if -I has no parameter
+ addtree = $(if $(patsubst -I%,%,$(1)), \
+diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
+new file mode 100644
+index 00000000000..7301ab5e2e0
+--- /dev/null
+++ b/scripts/Makefile.dtbinst
+@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: GPL-2.0
+# ==========================================================================
+# Installing dtb files
+#
+# Installs all dtb files listed in $(dtb-y) either in the
+# INSTALL_DTBS_PATH directory or the default location:
+#
+#   $INSTALL_PATH/dtbs/$KERNELRELEASE
+# ==========================================================================
+
+src := $(obj)
+
+PHONY := __dtbs_install
+__dtbs_install:
+
+export dtbinst_root ?= $(obj)
+
+include include/config/auto.conf
+include scripts/Kbuild.include
+include $(src)/Makefile
+
+dtbinst-files	:= $(sort $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS), $(dtb-)))
+dtbinst-dirs	:= $(subdir-y) $(subdir-m)
+
+# Helper targets for Installing DTBs into the boot directory
+quiet_cmd_dtb_install =	INSTALL $<
+      cmd_dtb_install =	mkdir -p $(2); cp $< $(2)
+
+install-dir = $(patsubst $(dtbinst_root)%,$(INSTALL_DTBS_PATH)%,$(obj))
+
+$(dtbinst-files): %.dtb: $(obj)/%.dtb
+	$(call cmd,dtb_install,$(install-dir))
+
+$(dtbinst-dirs):
+	$(Q)$(MAKE) $(dtbinst)=$(obj)/$@
+
+PHONY += $(dtbinst-files) $(dtbinst-dirs)
+__dtbs_install: $(dtbinst-files) $(dtbinst-dirs)
+
+.PHONY: $(PHONY)
--- a/overlay/asus-z00t/compiler-gcc6.h
+++ b/overlay/asus-z00t/compiler-gcc6.h
@ -0,0 +1,69 @@
+// SOURCE:
+// https://github.com/NextThingCo/CHIP-u-boot/issues/10#issuecomment-287515505
+
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
+#endif
+
+#define __used				__attribute__((__used__))
+#define __must_check			__attribute__((warn_unused_result))
+#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
+
+/* Mark functions as cold. gcc will assume any path leading to a call
+   to them will be unlikely.  This means a lot of manual unlikely()s
+   are unnecessary now for any paths leading to the usual suspects
+   like BUG(), printk(), panic() etc. [but let's keep them for now for
+   older compilers]
+
+   Early snapshots of gcc 4.3 don't support this and we can't detect this
+   in the preprocessor, but we can live with this because they're unreleased.
+   Maketime probing would be overkill here.
+
+   gcc also has a __attribute__((__hot__)) to move hot functions into
+   a special section, but I don't see any sense in this right now in
+   the kernel context */
+#define __cold			__attribute__((__cold__))
+
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+#ifndef __CHECKER__
+# define __compiletime_warning(message) __attribute__((warning(message)))
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* __CHECKER__ */
+
+/*
+ * Mark a position in code as unreachable.  This can be used to
+ * suppress control flow warnings after asm blocks that transfer
+ * control elsewhere.
+ *
+ * Early snapshots of gcc 4.5 don't support this and we can't detect
+ * this in the preprocessor, but we can live with this because they're
+ * unreleased.  Really, we need to have autoconf for the kernel.
+ */
+#define unreachable() __builtin_unreachable()
+
+/* Mark a function definition as prohibited from being cloned. */
+#define __noclone	__attribute__((__noclone__))
+
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+
+/*
+ * GCC 'asm goto' miscompiles certain code sequences:
+ *
+ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
+ *
+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
+ *
+ * (asm goto is automatically volatile - the naming reflects this.)
+ */
+#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
+
+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
+#define __HAVE_BUILTIN_BSWAP32__
+#define __HAVE_BUILTIN_BSWAP64__
+#define __HAVE_BUILTIN_BSWAP16__
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+
--- a/overlay/asus-z00t/config-asus-z00t.aarch64
+++ b/overlay/asus-z00t/config-asus-z00t.aarch64
--- a/overlay/asus-z00t/default.nix
+++ b/overlay/asus-z00t/default.nix
@ -0,0 +1,141 @@
+{ stdenv, hostPlatform
+, overrideCC
+, gcc6
+, fetchurl
+, fetchFromGitHub
+, linuxManualConfig
+, firmwareLinuxNonfree
+, bison, flex
+, binutils-unwrapped
+, dtbTool
+, kernelPatches ? [] }:
+
+# Inspired by https://github.com/thefloweringash/rock64-nix/blob/master/packages/linux_ayufan_4_4.nix
+# Then in turn inspired by the postmarketos APKBUILDs.
+
+let
+  modDirVersion = "3.10.108";
+  #withAdditionalFirmware = stdenv.mkDerivation rec {
+  #  brcmfmac4356-pcie_txt = fetchurl {
+  #    url = "https://raw.githubusercontent.com/andir/nixos-gpd-pocket/master/firmware/brcmfmac4356-pcie.txt";
+  #    sha256 = "1v44f7y8pxqw3xmk2v43ny5lhjg6lpch2alry40pdzq56pnplypi";
+  #  };
+  #  name = "plus-extra--${firmwareLinuxNonfree.name}";
+  #  src = firmwareLinuxNonfree;
+  #  dontBuild = true;
+  #  installPhase = ''
+  #    cp -prf . $out
+  #    cp ${brcmfmac4356-pcie_txt} $out/lib/firmware/brcm/brcmfmac4356-pcie.txt
+  #  '';
+  #};
+
+  version = "${modDirVersion}";
+  src = fetchFromGitHub {
+    owner = "LineageOS";
+    repo = "android_kernel_asus_msm8916";
+    rev = "5fd66aa9219bf9aaa504aa3cb2dae7a3de5238f7";
+    sha256 = "1f2ynnkaxdcm8w3846fd7a304m08fqlpv78mlkdg92fjczw261vx";
+  };
+  patches = [
+    ./01_fix_gcc6_errors.patch
+    ./02_mdss_fb_refresh_rate.patch
+    ./05_dtb-fix.patch
+    ./90_dtbs-install.patch
+  ];
+  postPatch = ''
+    patchShebangs .
+
+    cp -v "${./compiler-gcc6.h}" "./include/linux/compiler-gcc6.h"
+
+    # Remove -Werror from all makefiles
+    local i
+    local makefiles="$(find . -type f -name Makefile)
+    $(find . -type f -name Kbuild)"
+    for i in $makefiles; do
+      sed -i 's/-Werror-/-W/g' "$i"
+      sed -i 's/-Werror//g' "$i"
+    done
+    echo "Patched out -Werror"
+  '';
+
+  additionalInstall = ''
+    # Generate master DTB (deviceinfo_bootimg_qcdt)
+    ${dtbTool}/bin/dtbTool -s 2048 -p "scripts/dtc/" -o "arch/arm64/boot/dt.img" "arch/arm/boot/"
+
+    mkdir -p "$out/boot"
+    cp "arch/arm64/boot/dt.img" \
+             "$out/boot/dt.img"
+
+    # Copies all potential output files.
+    for f in zImage-dtb Image.gz-dtb; do
+    #*zImage Image.gz Image; do
+      f=arch/arm64/boot/$f
+      [ -e "$f" ] || continue
+      echo "zImage found: $f"
+      cp -v "$f" "$out/"
+    done
+
+    # Copies the dtb, could always be useful.
+    mkdir -p $out/dtb
+    for f in arch/*/boot/dts/*.dtb; do
+      cp -v "$f" $out/dtb/
+    done
+
+    # Copies the .config file to output.
+    # Helps ensuring sanity.
+    cp -v .config $out/src.config
+
+    # Finally, makes Image.gz-dtb image ourselves.
+    # Somehow the build system has issues.
+    (
+    cd $out
+    cat Image.gz dtb/*.dtb > Image.gz-dtb
+    )
+  '';
+in
+let
+  buildLinux = (args: (linuxManualConfig args).overrideAttrs ({ makeFlags, postInstall, ... }: {
+    inherit patches postPatch;
+    postInstall = ''
+      ${postInstall}
+
+      ${additionalInstall}
+    '';
+    installTargets = [ "dtbs" "zinstall" ];
+    dontStrip = true;
+  }));
+
+  configfile = stdenv.mkDerivation {
+    name = "android-asus-z00t-config-${modDirVersion}";
+    inherit version;
+    inherit src patches postPatch;
+    nativeBuildInputs = [bison flex];
+
+    buildPhase = ''
+      echo "building config file"
+      cp -v ${./config-asus-z00t.aarch64} .config
+      yes "" | make $makeFlags "''${makeFlagsArray[@]}" oldconfig || :
+    '';
+
+    installPhase = ''
+      # FIXME ?
+      #substituteInPlace .config --replace \
+      #  /lib/firmware \
+      #  "$ {withAdditionalFirmware}/lib/firmware"
+      cp -v .config $out
+    '';
+  };
+
+in
+
+buildLinux {
+  inherit kernelPatches;
+  inherit hostPlatform;
+  inherit src;
+  inherit version;
+  inherit modDirVersion;
+  inherit configfile;
+  stdenv = overrideCC stdenv gcc6;
+
+  allowImportFromDerivation = true;
+}
--- a/overlay/default.nix
+++ b/overlay/default.nix
@ -0,0 +1,11 @@
+# This defines the mobile-nixos "overlay" which is
+# basically a known channel + this overlay defined
+# in overlay.nix.
+#
+# Every derivations building a boot image and or a
+# complete system will import this file somehow.
+(import (fetchTarball channel:nixos-unstable)) {
+  overlays = [
+    (import ./overlay.nix)
+  ];
+}
--- a/overlay/dtbtool/00_fix_version_detection.patch
+++ b/overlay/dtbtool/00_fix_version_detection.patch
@ -0,0 +1,13 @@
+diff --git a/dtbTool b/dtbTool
+index b11402d..2dcdd87 100755
+--- a/dtbTool
+++ b/dtbTool
+@@ -353,7 +353,7 @@ def generate_records(f, pagesize):
+ 	board_id = fdt_get_property_int(blob, 0, "qcom,board-id")
+ 	pmic_id = fdt_get_property_int(blob, 0, "qcom,pmic-id")
+ 
+-	if board_id:
+	if board_id and msm_id:
+ 		x = iter(board_id)
+ 		board_id = list(zip(x, x))
+ 		x = iter(msm_id)
--- a/overlay/dtbtool/01_find_dtb_in_subfolders.patch
+++ b/overlay/dtbtool/01_find_dtb_in_subfolders.patch
@ -0,0 +1,33 @@
+diff --git a/dtbTool b/dtbTool
+index 2dcdd87..0c14a94 100644
+--- a/dtbTool
+++ b/dtbTool
+@@ -408,6 +408,16 @@ def write_padding(f, pagesize):
+ 	if count != pagesize:
+ 		output.write(b"".join([b'\x00' for x in range(count)]))
+ 
+def find_dtb(indir):
+	flist = list()
+	for f in os.listdir(indir):
+		ff = os.path.join(indir, f)
+		if os.path.isfile(ff) and ff.endswith('.dtb'):
+			flist.append(ff)
+		elif os.path.isdir(ff):
+			flist.extend(find_dtb(ff))
+	return flist
+
+ if __name__ == "__main__":
+ 	usage = ("""%prog -o <output file> <input DTB directory> [options]""")
+ 	parser = OptionParser(usage=usage)
+@@ -434,10 +444,7 @@ if __name__ == "__main__":
+ 
+ 	pagesize = options.pagesize
+ 	indir = args[0]
+-	flist = [os.path.join(indir, f)
+-			for f in os.listdir(indir)
+-			if os.path.isfile(os.path.join(indir, f)) and
+-			   f.endswith('.dtb')]
+	flist = find_dtb(indir)
+ 
+ 	records = []
+ 	for f in flist:
--- a/overlay/dtbtool/default.nix
+++ b/overlay/dtbtool/default.nix
@ -0,0 +1,43 @@
+{stdenv, fetchurl, python2, dtc, python2Packages}:
+
+stdenv.mkDerivation {
+  name = "dtbtool";
+  version = "1.6.0";
+  src = fetchurl {
+    url = "https://source.codeaurora.org/quic/kernel/skales/plain/dtbTool?id=1.6.0";
+    sha256 = "0lbzpqbar0fr9y53v95v0yrrn2pnm8m1wj43h3l83f7awqma68x2";
+  };
+
+  patches = [
+    ./00_fix_version_detection.patch
+    ./01_find_dtb_in_subfolders.patch
+  ];
+
+  buildInputs = [
+    python2
+  ];
+
+  nativeBuildInputs = [
+    python2Packages.wrapPython
+    dtc
+  ];
+
+  pythonPath = [ dtc ];
+
+  postPatch = ''
+    substituteInPlace dtbTool \
+      --replace "libfdt.so" "${dtc}/lib/libfdt.so"
+  '';
+
+  unpackCmd = "mkdir out; cp $curSrc out/dtbTool";
+
+  installPhase = ''
+    patchShebangs ./
+    mkdir -p $out/bin
+    cp -v dtbTool $out/bin/
+    chmod +x $out/bin/dtbTool
+    wrapPythonPrograms
+  '';
+
+  # TODO meta url : https://source.codeaurora.org/quic/kernel/skales/plain/dtbTool
+}
--- a/overlay/mkbootimg/default.nix
+++ b/overlay/mkbootimg/default.nix
@ -0,0 +1,26 @@
+{stdenv, fetchurl, python2, dtc, python2Packages}:
+
+let
+  version = "2017.12.13";
+in
+stdenv.mkDerivation {
+  inherit version;
+  name = "mkbootimg";
+
+  src = fetchurl {
+    url = "https://github.com/osm0sis/mkbootimg/archive/${version}.tar.gz";
+    sha256 = "1wyn0a2nxwyz3j6yx4vmm67inrsh83h24sfig6y7ww249miix2xp";
+  };
+
+  postPatch = ''
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp -v mkbootimg $out/bin/
+    cp -v unpackbootimg $out/bin/
+    chmod +x $out/bin/*
+  '';
+
+  # TODO meta url : https://source.codeaurora.org/quic/kernel/skales/plain/dtbTool
+}
--- a/overlay/overlay.nix
+++ b/overlay/overlay.nix
@ -0,0 +1,20 @@
+self: super:
+
+let
+  callPackage = self.callPackage;
+in
+  {
+   linux_asus_z00t = callPackage ./asus-z00t {
+     kernelPatches = with self.kernelPatches; [
+       bridge_stp_helper
+       p9_fixes
+       lguest_entry-linkage
+       packet_fix_race_condition_CVE_2016_8655
+       DCCP_double_free_vulnerability_CVE-2017-6074
+     ];
+   };
+
+   dtbTool = callPackage ./dtbtool { };
+
+   mkbootimg = callPackage ./mkbootimg { };
+ }
--- a/shell.nix
+++ b/shell.nix
@ -0,0 +1,10 @@
+with (import ./overlay);
+
+# A basic shell with some tools available.
+mkShell rec {
+  name = "nixos-mobile";
+  buildInputs = [
+    mkbootimg
+    dtbTool
+  ];
+}