samples: rust: platform: Add property child and reference args examples

Add some example usage of the device property methods for reading
DT/ACPI/swnode child nodes and reference args.

Signed-off-by: Remo Senekowitsch <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Convert 'child@{0,1}' to 'child-{0,1}'; skip child nodes without
  'compatible' property in of_unittest_platform_populate() as proposed
  by Rob Herring. - Danilo]
Signed-off-by: Danilo Krummrich <[email protected]>

1 files changed, 12 insertions, 1 deletions

diff --git a/samples/rust/rust_driver_platform.rs b/samples/rust/rust_driver_platform.rs
index c0abf78d0683..4dcedb22a4bb 100644
--- a/samples/rust/rust_driver_platform.rs
+++ b/samples/rust/rust_driver_platform.rs
@@ -4,7 +4,11 @@
 
 use kernel::{
     c_str,
-    device::{self, Core},
+    device::{
+        self,
+        property::{FwNodeReferenceArgs, NArgs},
+        Core,
+    },
     of, platform,
     prelude::*,
     str::CString,
@@ -91,6 +95,13 @@ impl SampleDriver {
         let prop: KVec<i16> = fwnode.property_read_array_vec(name, 4)?.required_by(dev)?;
         dev_info!(dev, "'{name}'='{prop:?}' (KVec)\n");
 
+        for child in fwnode.children() {
+            let name = c_str!("test,ref-arg");
+            let nargs = NArgs::N(2);
+            let prop: FwNodeReferenceArgs = child.property_get_reference_args(name, nargs, 0)?;
+            dev_info!(dev, "'{name}'='{prop:?}'\n");
+        }
+
         Ok(())
     }
 }