diff options
| author | Thibaut VARÈNE <hacks@slashdirt.org> | 2020-04-20 13:48:02 +0200 |
|---|---|---|
| committer | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2020-05-08 15:17:17 +0200 |
| commit | 02a9d3d6a932cdf707f8bcf4555d095839ce8d24 (patch) | |
| tree | 8e1f51e4fc3403954c44ce516b1e51d15b0109c1 /package/base-files/files/lib | |
| parent | 8f4735297bbfb24976e06bb4f2f115be29a99404 (diff) | |
| download | upstream-02a9d3d6a932cdf707f8bcf4555d095839ce8d24.tar.gz upstream-02a9d3d6a932cdf707f8bcf4555d095839ce8d24.tar.bz2 upstream-02a9d3d6a932cdf707f8bcf4555d095839ce8d24.zip | |
package/base-files: add caldata_sysfsload_from_file()
This routine enables loading caldata binary via the kernel sysfs loader
See https://www.kernel.org/doc/html/v4.19/driver-api/firmware/fallback-mechanisms.html
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Diffstat (limited to 'package/base-files/files/lib')
| -rw-r--r-- | package/base-files/files/lib/functions/caldata.sh | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions/caldata.sh b/package/base-files/files/lib/functions/caldata.sh index 5e969e3409..6862da7164 100644 --- a/package/base-files/files/lib/functions/caldata.sh +++ b/package/base-files/files/lib/functions/caldata.sh @@ -68,6 +68,21 @@ caldata_from_file() { caldata_die "failed to extract calibration data from $source" } +caldata_sysfsload_from_file() { + local source=$1 + local offset=$(($2)) + local count=$(($3)) + + # test extract to /dev/null first + dd if=$source of=/dev/null iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ + caldata_die "failed to extract calibration data from $source" + + # can't fail now + echo 1 > /sys/$DEVPATH/loading + dd if=$source of=/sys/$DEVPATH/data iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null + echo 0 > /sys/$DEVPATH/loading +} + caldata_valid() { local expected="$1" local target=$2 |