scripts/dts: add basic test for IO channel property

Test the new io-channel support

Signed-off-by: Jim Paris <jim@jtan.com>

scripts/dts/test-bindings/io-channel.yaml

@@ -0,0 +1,14 @@
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+title: IO channel with one cell
+description: IO channel with one cell
+
+properties:
+    compatible:
+        constraint: "io-channel"
+        type: string-array
+
+"#cells":
+  - one

scripts/dts/test.dts

@@ -195,6 +195,22 @@
 		};
 	};
 
+	//
+	// IO channels
+	//
+
+	// Lots of common code with PWMs and clocks, so just test the basics
+	io-channel-test {
+		io-channel {
+			compatible = "io-channel";
+			#io-channel-cells = <1>;
+		};
+		node {
+			io-channels = <&{/io-channel-test/io-channel} 1>;
+			io-channel-names = "io-channel";
+		};
+	};
+
 	//
 	// 'reg'
 	//

scripts/dts/testedtlib.py

@@ -72,6 +72,13 @@ def run():
     verify_streq(edt.get_dev("/pwm-test/node").pwms,
                  "[<PWM, name: zero-cell, target: <Device /pwm-test/pwm-0 in 'test.dts', binding test-bindings/pwm-0-cell.yaml>, specifier: {}>, <PWM, name: one-cell, target: <Device /pwm-test/pwm-1 in 'test.dts', binding test-bindings/pwm-1-cell.yaml>, specifier: {'one': 1}>]")
 
+    #
+    # Test IO channels
+    #
+
+    verify_streq(edt.get_dev("/io-channel-test/node").iochannels,
+                 "[<IOChannel, name: io-channel, target: <Device /io-channel-test/io-channel in 'test.dts', binding test-bindings/io-channel.yaml>, specifier: {'one': 1}>]")
+
     #
     # Test 'reg'
     #