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test: dm: add a test for MDIO MUX DM uclass

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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>
This commit is contained in:
Alex Marginean
2019-07-12 10:13:53 +03:00
committed by Joe Hershberger
parent b47edf8069
commit c3d9f3f899
7 changed files with 212 additions and 1 deletions
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23
arch/sandbox/dts/test.dts
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@@ -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";
};
};