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

Miquel Raynal (Schneider Electric)
2026-03-27T20:11:02Z

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@kernel.org>
Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@bootlin.com>
---
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