diff options
| author | Christoph Niedermaier <cniedermaier@dh-electronics.de> | 2018-11-05 09:48:35 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2018-11-06 15:36:22 +0100 |
| commit | 8bed5a5cfc3317217f4b4ddad8044cbdd13d5a20 (patch) | |
| tree | 17192f617896cd0afc7bbd22e84d01eaaa2f01b2 /Documentation/EDID/Makefile | |
| parent | Docs/EDID: Fixed erroneous bits of XOFFSET, XPULSE, YOFFSET and YPULSE (diff) | |
| download | linux-8bed5a5cfc3317217f4b4ddad8044cbdd13d5a20.tar.xz linux-8bed5a5cfc3317217f4b4ddad8044cbdd13d5a20.zip | |
Docs/EDID: Calculate CRC while building the code
The previous version made it necessary to first generate an
EDID data set without correct CRC and then to fix the CRC in
a second step. This patch adds the CRC calculation to the
makefile in such a way that a correct EDID data set is generated
in a single build step. Successfully tested with all existing
and a couple of new data sets.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.de>
Reviewed-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/EDID/Makefile')
| -rw-r--r-- | Documentation/EDID/Makefile | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/EDID/Makefile b/Documentation/EDID/Makefile index 17763ca3f12b..85a927dfab02 100644 --- a/Documentation/EDID/Makefile +++ b/Documentation/EDID/Makefile @@ -15,10 +15,21 @@ clean: %.o: %.S @cc -c $^ -%.bin: %.o +%.bin.nocrc: %.o @objcopy -Obinary $^ $@ -%.bin.ihex: %.o +%.crc: %.bin.nocrc + @list=$$(for i in `seq 1 127`; do head -c$$i $^ | tail -c1 \ + | hexdump -v -e '/1 "%02X+"'; done); \ + echo "ibase=16;100-($${list%?})%100" | bc >$@ + +%.p: %.crc %.S + @cc -c -DCRC="$$(cat $*.crc)" -o $@ $*.S + +%.bin: %.p + @objcopy -Obinary $^ $@ + +%.bin.ihex: %.p @objcopy -Oihex $^ $@ @dos2unix $@ 2>/dev/null |