daemon: udev: allow read access to PHC

Allow users to access the PTP hardware clock

Related to #3217

src/daemon/90-pipewire-aes67-ptp.rules

@@ -0,0 +1,6 @@
+# This file was installed by PipeWire project for its pipewire-aes67
+#
+# This is used to give readonly access to the PTP hardware clock.
+# PipeWire uses this to follow PTP grandmaster time. It should be synced by another service
+#
+KERNEL=="ptp[0-9]*", MODE="0644"

src/daemon/meson.build

@@ -162,3 +162,13 @@ subdir('filter-chain')
 if systemd.found()
   subdir('systemd')
 endif
+
+aes67_udevrules = [
+  '90-pipewire-aes67-ptp.rules',
+]
+
+if libudev_dep.found()
+  install_data(aes67_udevrules,
+    install_dir : udevrulesdir,
+  )
+endif