test: dm: add a test for MDIO MUX DM uclass
Adds a test using a makeshift MDIO MUX. The test is based on the existing
MDIO test. It uses the last emulated PHY register to verify MUX selection.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 531c1af..a085676 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -824,7 +824,28 @@
dma-names = "m2m", "tx0", "rx0";
};
- mdio-test {
+ /*
+ * keep mdio-mux ahead of mdio so that the mux is removed first at the
+ * end of the test. If parent mdio is removed first, clean-up of the
+ * mux will trigger a 2nd probe of parent-mdio, leaving parent-mdio
+ * active at the end of the test. That it turn doesn't allow the mdio
+ * class to be destroyed, triggering an error.
+ */
+ mdio-mux-test {
+ compatible = "sandbox,mdio-mux";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ mdio-parent-bus = <&mdio>;
+
+ mdio-ch-test@0 {
+ reg = <0>;
+ };
+ mdio-ch-test@1 {
+ reg = <1>;
+ };
+ };
+
+ mdio: mdio-test {
compatible = "sandbox,mdio";
};
};