Moving ARM dts files

[Rob Herring <robh@kernel.org>]

Olof, Arnd,

I've put together a script to move the dts files and update the 
makefiles. It doesn't handle files not following a common prefix which 
isn't many and some includes within the dts files will need some fixups 
by hand.

MAINTAINERS will also need updating.

A few questions:

Do we want to move absolutely everything to subdirs? There's quite a 
few platforms with only 1-2 platforms. I haven't added these to the 
list yet, but can.

Do any vendors need another level of directories? davinci, omap, nspire, 
etc. for TI for example.

What to do with armv7m.dtsi? I guess it should remain and we just fixup 
the include. There may be a few other cross vendor things.


Sub-arch maintainers, 
'vendor_map' below is the mapping of file prefix to new subdirectory 
(the SoC vendor prefix). Please comment if there are any issues.

Rob

8<-----------------------------------------------------------
#!/usr/bin/env python3

import os
import re
from git import Git
import glob

vendor_map = {
    'imx': 'fsl',
    'ls': 'fsl',
    'vf': 'fsl',
    'qcom': 'qcom',
    'am3' : 'ti',
    'am4' : 'ti',
    'am5' : 'ti',
    'da' : 'ti',
    'dm' : 'ti',
    'dra' : 'ti',
    'keystone' : 'ti',
    'omap' : 'ti',
    'nspire' : 'ti',
    'armada' : 'marvell',
    'berlin' : 'marvell',
    'dove' : 'marvell',
    'kirkwood' : 'marvell',
    'orion' : 'marvell',
    'pxa' : 'marvell',
    'mvebu' : 'marvell',
    'mmp2' : 'marvell',
    'arm-' : 'arm',
    'integ' : 'arm',
    've' : 'arm',
    'aspeed' : 'aspeed',
    'at91' : 'atmel',
    'sama' : 'atmel',
    'bcm' : 'brcm',
    'exynos' : 'samsung',
    's3c' : 'samsung',
    's5p' : 'samsung',
    'gemini' : 'cortina',
    'hi3' : 'hisilicon',
    'hip' : 'hisilicon',
    'hisi' : 'hisilicon',
    'mt' : 'mediatek',
    'meson' : 'amlogic',
    'owl' : 'actions',
    'r7' : 'renesas',
    'r8' : 'renesas',
    'r9' : 'renesas',
    'rk' : 'rockchip',
    'socfpga' : 'altera',
    'st' : 'st',
    'spear' : 'st',
    'sun' : 'allwinner',
    'tegra' : 'nvidia',
    'zynq' : 'xilinx',
    'wm' : 'wm',
    'uniph' : 'socionext',
    'zx' : 'zte',
}

if __name__ == "__main__":
    g = Git('.')

    g.checkout("HEAD", "arch/arm/boot/dts/Makefile")
    dts_make = open("arch/arm/boot/dts/Makefile", "r").read()

    # make entries 1 line
    make2 = re.sub(r'\\\n', '', dts_make)

    for k,v in vendor_map.items():
        for f in glob.iglob("arch/arm/boot/dts/" + k + "*.*"):
            new_dir = "arch/arm/boot/dts/" + v + "/"
            base = os.path.splitext(os.path.basename(f))[0]

            os.makedirs(new_dir, exist_ok=True)
            g.mv(f, new_dir)

            # Remove the file from the makefile
            dts_make = re.sub('.*' + base + r'\.dtb.*\\\n', '', dts_make)
            dts_make = re.sub('.*' + base + r'\.dtb', '', dts_make)

            # extract the matching makefile entry
            reg = re.search(r'.*' + base + r'.*', make2)
            if not reg:
                continue

            entry = reg.group(0)
            make2 = re.sub(r'.*' + base + r'.*', '', make2)
            if entry:
                makefile = open(new_dir + 'Makefile', 'a+')
                print(entry, file=makefile)
                makefile.close()


    for d in sorted(glob.iglob("arch/arm/boot/dts/*/")):
        dts_make += 'subdir-y += ' + d.split(os.path.sep)[-2] + '\n'

        # Add license and sort entries of sub-dir makefile
        vendor_make = '# SPDX-License-Identifier: GPL-2.0\n'
        make_lines = open(d + 'Makefile', 'r').readlines()
        for l in sorted(make_lines):
            vendor_make += l

        vendor_make = re.sub(r'\t', r'\\\n\t', vendor_make)

        f = open(d + 'Makefile', 'w')
        f.write(vendor_make)
        f.close()
        g.add(d + 'Makefile')

    # Remove entries with no dtbs left
    dts_make = re.sub(r'.*\+= \\\n\n', '', dts_make)

    open("arch/arm/boot/dts/Makefile", "w").write(dts_make)
    g.add("arch/arm/boot/dts/Makefile")