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 22srctree="$1" 23objtree="$2" 24ref_cfg="$3" 25cfg="$4" 26boards_origin="$5" 27shift 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. 32case ${boards_origin} in 33"command line") 34 print_skipped=1 35 ;; 36environment*) 37 print_skipped=1 38 ;; 39*) 40 print_skipped=0 41 ;; 42esac 43 44for 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)' 84done 85