linux-kernel - [PATCH 06/12] clk: Test clk_get_phase() behavior after clk

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Message-ID: <20240815005520.1192374-7-sboyd@kernel.org>
Date: Wed, 14 Aug 2024 17:55:12 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org,
	patches@...ts.linux.dev,
	Nuno Sá <nuno.sa@...log.com>
Subject: [PATCH 06/12] clk: Test clk_get_phase() behavior after clk_hw is unregistered

The previous commit fixed clk_get_phase() so that it returns failure
after a clk_hw is unregistered. Add a test for that so that stays true.

Cc: Nuno Sá <nuno.sa@...log.com>
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
---
 drivers/clk/clk_test.c | 62 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c
index c06971fe9922..f97d13bb0242 100644
--- a/drivers/clk/clk_test.c
+++ b/drivers/clk/clk_test.c
@@ -3114,6 +3114,7 @@ struct clk_unregister_consumer_clk_ctx {
 	bool unregistered;
 	unsigned long rate;
 	unsigned long accuracy;
+	int phase;
 	struct clk *clk;
 };
 
@@ -3245,6 +3246,38 @@ static void clk_unregister_consumer_clk_get_accuracy_skips(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, ctx->accuracy, clk_get_accuracy(ctx->clk));
 }
 
+/*
+ * Test that clk_set_phase() doesn't call the clk_op after the clk_hw has been
+ * unregistered and returns failure.
+ */
+static void clk_unregister_consumer_clk_set_phase_fails(struct kunit *test)
+{
+	struct clk_unregister_consumer_clk_ctx *ctx = test->priv;
+	const int degrees = 12;
+
+	KUNIT_ASSERT_NE(test, degrees, clk_get_phase(ctx->clk));
+	clk_unregister_consumer_clk_unregister(test);
+
+	KUNIT_EXPECT_GT(test, 0, clk_set_phase(ctx->clk, degrees));
+	/* Phase is unchanged */
+	KUNIT_EXPECT_NE(test, degrees, clk_get_phase(ctx->clk));
+}
+
+/*
+ * Test that clk_get_phase() doesn't call the clk_op after the clk_hw has been
+ * unregistered and returns 0.
+ */
+static void clk_unregister_consumer_clk_get_phase_skips(struct kunit *test)
+{
+	struct clk_unregister_consumer_clk_ctx *ctx = test->priv;
+	const int phase = ctx->phase;
+
+	KUNIT_ASSERT_EQ(test, phase, clk_get_phase(ctx->clk));
+	clk_unregister_consumer_clk_unregister(test);
+
+	KUNIT_EXPECT_GT(test, 0, clk_get_phase(ctx->clk));
+}
+
 static struct kunit_case clk_unregister_consumer_clk_test_cases[] = {
 	KUNIT_CASE(clk_unregister_consumer_clk_prepare_fails),
 	KUNIT_CASE(clk_unregister_consumer_clk_unprepare_skips),
@@ -3254,6 +3287,8 @@ static struct kunit_case clk_unregister_consumer_clk_test_cases[] = {
 	KUNIT_CASE(clk_unregister_consumer_clk_set_rate_fails),
 	KUNIT_CASE(clk_unregister_consumer_clk_get_rate_skips),
 	KUNIT_CASE(clk_unregister_consumer_clk_get_accuracy_skips),
+	KUNIT_CASE(clk_unregister_consumer_clk_set_phase_fails),
+	KUNIT_CASE(clk_unregister_consumer_clk_get_phase_skips),
 	KUNIT_CASE(clk_unregister_consumer_clk_put),
 	{}
 };
@@ -3356,6 +3391,30 @@ clk_unregister_consumer_clk_op_recalc_accuracy(struct clk_hw *hw,
 	return ctx->accuracy;
 }
 
+static int clk_unregister_consumer_clk_op_get_phase(struct clk_hw *hw)
+{
+	struct clk_unregister_consumer_clk_ctx *ctx;
+
+	ctx = container_of(hw, struct clk_unregister_consumer_clk_ctx, hw);
+	clk_unregister_consumer_clk_clk_op_called(hw, __func__);
+
+	return ctx->phase;
+}
+
+static int
+clk_unregister_consumer_clk_op_set_phase(struct clk_hw *hw, int degrees)
+{
+
+	struct clk_unregister_consumer_clk_ctx *ctx;
+
+	ctx = container_of(hw, struct clk_unregister_consumer_clk_ctx, hw);
+	clk_unregister_consumer_clk_clk_op_called(hw, __func__);
+
+	ctx->phase = degrees;
+
+	return 0;
+}
+
 static const struct clk_ops clk_unregister_consumer_clk_clk_ops = {
 	.prepare = clk_unregister_consumer_clk_op_prepare,
 	.unprepare = clk_unregister_consumer_clk_op_unprepare,
@@ -3366,6 +3425,8 @@ static const struct clk_ops clk_unregister_consumer_clk_clk_ops = {
 	.determine_rate = clk_unregister_consumer_clk_op_determine_rate,
 	.set_rate = clk_unregister_consumer_clk_op_set_rate,
 	.recalc_accuracy = clk_unregister_consumer_clk_op_recalc_accuracy,
+	.get_phase = clk_unregister_consumer_clk_op_get_phase,
+	.set_phase = clk_unregister_consumer_clk_op_set_phase,
 };
 
 static int clk_unregister_consumer_clk_init(struct kunit *test)
@@ -3385,6 +3446,7 @@ static int clk_unregister_consumer_clk_init(struct kunit *test)
 
 	ctx->rate = 42;
 	ctx->accuracy = 34;
+	ctx->phase = 90;
 	KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, NULL, &ctx->hw));
 
 	clk = clk_hw_get_clk_kunit(test, &ctx->hw, __func__);
-- 
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git