Merge tag 'mmc-v5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[sfrench/cifs-2.6.git] / arch / mips / tools / generic-board-config.sh
1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0-or-later
3 #
4 # Copyright (C) 2017 Imagination Technologies
5 # Author: Paul Burton <paul.burton@mips.com>
6 #
7 # This script merges configuration fragments for boards supported by the
8 # generic MIPS kernel. It checks each for requirements specified using
9 # formatted comments, and then calls merge_config.sh to merge those
10 # fragments which have no unmet requirements.
11 #
12 # An example of requirements in your board config fragment might be:
13 #
14 # # require CONFIG_CPU_MIPS32_R2=y
15 # # require CONFIG_CPU_LITTLE_ENDIAN=y
16 #
17 # This would mean that your board is only included in kernels which are
18 # configured for little endian MIPS32r2 CPUs, and not for example in kernels
19 # configured for 64 bit or big endian systems.
20 #
21
22 srctree="$1"
23 objtree="$2"
24 ref_cfg="$3"
25 cfg="$4"
26 boards_origin="$5"
27 shift 5
28
29 # Only print Skipping... lines if the user explicitly specified BOARDS=. In the
30 # general case it only serves to obscure the useful output about what actually
31 # was included.
32 case ${boards_origin} in
33 "command line")
34         print_skipped=1
35         ;;
36 environment*)
37         print_skipped=1
38         ;;
39 *)
40         print_skipped=0
41         ;;
42 esac
43
44 for board in $@; do
45         board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
46         if [ ! -f "${board_cfg}" ]; then
47                 echo "WARNING: Board config '${board_cfg}' not found"
48                 continue
49         fi
50
51         # For each line beginning with # require, cut out the field following
52         # it & search for that in the reference config file. If the requirement
53         # is not found then the subshell will exit with code 1, and we'll
54         # continue on to the next board.
55         grep -E '^# require ' "${board_cfg}" | \
56             cut -d' ' -f 3- | \
57             while read req; do
58                 case ${req} in
59                 *=y)
60                         # If we require something =y then we check that a line
61                         # containing it is present in the reference config.
62                         grep -Eq "^${req}\$" "${ref_cfg}" && continue
63                         ;;
64                 *=n)
65                         # If we require something =n then we just invert that
66                         # check, considering the requirement met if there isn't
67                         # a line containing the value =y in the reference
68                         # config.
69                         grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" || continue
70                         ;;
71                 *)
72                         echo "WARNING: Unhandled requirement '${req}'"
73                         ;;
74                 esac
75
76                 [ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
77                 exit 1
78         done || continue
79
80         # Merge this board config fragment into our final config file
81         ${srctree}/scripts/kconfig/merge_config.sh \
82                 -m -O ${objtree} ${cfg} ${board_cfg} \
83                 | grep -Ev '^(#|Using)'
84 done