x86: use sysfs DMI information to populate sysinfo

Use the DMI data available in sysfs to extract manufacturer and model info
and write it to /tmp/sysinfo/.

The data will be picked up by board_detect and can be used by e.g. LuCI to
display a more appropriate model description.

On an APU board the files will contain the following values:

    # cat /tmp/sysinfo/model
    PC Engines APU

    # cat /tmp/sysinfo/board_name
    pc-engines-apu

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/target/linux/x86/base-files/lib/preinit/20_sysinfo b/target/linux/x86/base-files/lib/preinit/20_sysinfo
new file mode 100644 (file)
index 0000000..cb63a04
--- /dev/null
+++ b/target/linux/x86/base-files/lib/preinit/20_sysinfo
@@ -0,0 +1,28 @@
+do_sysinfo_x86() {
+       local vendor product file
+
+       for file in sys_vendor board_vendor; do
+               vendor="$(cat /sys/devices/virtual/dmi/id/$file 2>/dev/null)"
+               [ -n "$vendor" ] && break
+       done
+
+       for file in product_name board_name; do
+               product="$(cat /sys/devices/virtual/dmi/id/$file 2>/dev/null)"
+               [ -n "$product" ] && break
+       done
+
+       [ -n "$vendor" -a -n "$product" ] || return
+
+       mkdir -p /tmp/sysinfo
+
+       echo "$vendor $product" > /tmp/sysinfo/model
+
+       sed -e '
+               y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/;
+               s/[^a-z0-9_-]\+/-/g;
+               s/^-//;
+               s/-$//;
+       ' /tmp/sysinfo/model > /tmp/sysinfo/board_name
+}
+
+boot_hook_add preinit_main do_sysinfo_x86