[PATCH 11/16] clk: tests: Add Kunit testing for nexus nodes

[Miquel Raynal (Schneider Electric)]

Add a nexus node with a child requesting a mapped clock in the fake DT
overlay to verify that the parsing is also correctly working.

Suggested-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@xxxxxxxxxxx>
---
 drivers/clk/clk_test.c                   | 20 ++++++++++++++++++++
 drivers/clk/kunit_clk_parse_clkspec.dtso | 10 ++++++++++
 2 files changed, 30 insertions(+)

diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c
index 8a17ad0d185f..cb0071955146 100644
--- a/drivers/clk/clk_test.c
+++ b/drivers/clk/clk_test.c
@@ -3660,10 +3660,30 @@ static void clk_parse_and_get_parent_name(struct kunit *test)
 			   clk_parse_clkspec_1_init_data.name);
 }
 
+static void clk_parse_and_get_nexus(struct kunit *test)
+{
+	struct clk_parse_clkspec_ctx *ctx = test->priv;
+	struct clk_hw *hw1, *hw2;
+	struct device_node *np;
+
+	/* Get clocks by index */
+	np = of_find_node_by_name(NULL, "kunit-clock-nexus-child");
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, np);
+	hw1 = of_clk_get_hw(np, 0, NULL);
+	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, hw1);
+
+	hw2 = of_clk_get_hw(ctx->cons_np, 1, NULL);
+	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, hw2);
+	KUNIT_EXPECT_PTR_EQ(test, hw1, hw2);
+
+	of_node_put(np);
+}
+
 static struct kunit_case clk_parse_clkspec_test_cases[] = {
 	KUNIT_CASE(clk_parse_clkspec_with_correct_index_and_name),
 	KUNIT_CASE(clk_parse_clkspec_with_incorrect_index_and_name),
 	KUNIT_CASE(clk_parse_and_get_parent_name),
+	KUNIT_CASE(clk_parse_and_get_nexus),
 	{}
 };
 
diff --git a/drivers/clk/kunit_clk_parse_clkspec.dtso b/drivers/clk/kunit_clk_parse_clkspec.dtso
index c93feb93e101..a4115216d2aa 100644
--- a/drivers/clk/kunit_clk_parse_clkspec.dtso
+++ b/drivers/clk/kunit_clk_parse_clkspec.dtso
@@ -18,4 +18,14 @@ kunit-clock-consumer {
 		clocks = <&kunit_clock_provider1 0>, <&kunit_clock_provider2 0>;
 		clock-names = "first_clock", "second_clock";
 	};
+
+	kunit_clock_nexus: kunit-clock-nexus {
+		clocks = <&kunit_clock_provider2 0>;
+		clock-map = <&kunit_clock_provider2 0>;
+		#clock-cells = <0>;
+
+		kunit-clock-nexus-child {
+			clocks = <&kunit_clock_nexus>;
+		};
+	};
 };

-- 
2.51.1