From 02a9d3d6a932cdf707f8bcf4555d095839ce8d24 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thibaut=20VAR=C3=88NE?= Date: Mon, 20 Apr 2020 13:48:02 +0200 Subject: package/base-files: add caldata_sysfsload_from_file() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- package/base-files/files/lib/functions/caldata.sh | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'package/base-files/files/lib/functions/caldata.sh') 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 -- cgit v1.2.3