diff options
Diffstat (limited to 'drivers/clk/clk-gate_test.c')
| -rw-r--r-- | drivers/clk/clk-gate_test.c | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/drivers/clk/clk-gate_test.c b/drivers/clk/clk-gate_test.c new file mode 100644 index 000000000..e136aaad4 --- /dev/null +++ b/drivers/clk/clk-gate_test.c @@ -0,0 +1,464 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Kunit test for clk gate basic type + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/platform_device.h> + +#include <kunit/test.h> + +static void clk_gate_register_test_dev(struct kunit *test) +{ + struct clk_hw *ret; + struct platform_device *pdev; + + pdev = platform_device_register_simple("test_gate_device", -1, NULL, 0); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev); + + ret = clk_hw_register_gate(&pdev->dev, "test_gate", NULL, 0, NULL, + 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret); + KUNIT_EXPECT_STREQ(test, "test_gate", clk_hw_get_name(ret)); + KUNIT_EXPECT_EQ(test, 0UL, clk_hw_get_flags(ret)); + + clk_hw_unregister_gate(ret); + platform_device_put(pdev); +} + +static void clk_gate_register_test_parent_names(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *ret; + + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 1000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + ret = clk_hw_register_gate(NULL, "test_gate", "test_parent", 0, NULL, + 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret); + KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret)); + + clk_hw_unregister_gate(ret); + clk_hw_unregister_fixed_rate(parent); +} + +static void clk_gate_register_test_parent_data(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *ret; + struct clk_parent_data pdata = { }; + + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 1000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + pdata.hw = parent; + + ret = clk_hw_register_gate_parent_data(NULL, "test_gate", &pdata, 0, + NULL, 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret); + KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret)); + + clk_hw_unregister_gate(ret); + clk_hw_unregister_fixed_rate(parent); +} + +static void clk_gate_register_test_parent_data_legacy(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *ret; + struct clk_parent_data pdata = { }; + + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 1000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + pdata.name = "test_parent"; + + ret = clk_hw_register_gate_parent_data(NULL, "test_gate", &pdata, 0, + NULL, 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret); + KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret)); + + clk_hw_unregister_gate(ret); + clk_hw_unregister_fixed_rate(parent); +} + +static void clk_gate_register_test_parent_hw(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *ret; + + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 1000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + ret = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0, NULL, + 0, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret); + KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret)); + + clk_hw_unregister_gate(ret); + clk_hw_unregister_fixed_rate(parent); +} + +static void clk_gate_register_test_hiword_invalid(struct kunit *test) +{ + struct clk_hw *ret; + + ret = clk_hw_register_gate(NULL, "test_gate", NULL, 0, NULL, + 20, CLK_GATE_HIWORD_MASK, NULL); + + KUNIT_EXPECT_TRUE(test, IS_ERR(ret)); +} + +static struct kunit_case clk_gate_register_test_cases[] = { + KUNIT_CASE(clk_gate_register_test_dev), + KUNIT_CASE(clk_gate_register_test_parent_names), + KUNIT_CASE(clk_gate_register_test_parent_data), + KUNIT_CASE(clk_gate_register_test_parent_data_legacy), + KUNIT_CASE(clk_gate_register_test_parent_hw), + KUNIT_CASE(clk_gate_register_test_hiword_invalid), + {} +}; + +static struct kunit_suite clk_gate_register_test_suite = { + .name = "clk-gate-register-test", + .test_cases = clk_gate_register_test_cases, +}; + +struct clk_gate_test_context { + void __iomem *fake_mem; + struct clk_hw *hw; + struct clk_hw *parent; + u32 fake_reg; /* Keep at end, KASAN can detect out of bounds */ +}; + +static struct clk_gate_test_context *clk_gate_test_alloc_ctx(struct kunit *test) +{ + struct clk_gate_test_context *ctx; + + test->priv = ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + ctx->fake_mem = (void __force __iomem *)&ctx->fake_reg; + + return ctx; +} + +static void clk_gate_test_parent_rate(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + unsigned long prate = clk_hw_get_rate(parent); + unsigned long rate = clk_hw_get_rate(hw); + + KUNIT_EXPECT_EQ(test, prate, rate); +} + +static void clk_gate_test_enable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = BIT(5); + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + + KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent)); +} + +static void clk_gate_test_disable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = BIT(5); + u32 disable_val = 0; + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg); + + clk_disable_unprepare(clk); + KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent)); +} + +static struct kunit_case clk_gate_test_cases[] = { + KUNIT_CASE(clk_gate_test_parent_rate), + KUNIT_CASE(clk_gate_test_enable), + KUNIT_CASE(clk_gate_test_disable), + {} +}; + +static int clk_gate_test_init(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 2000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0, + ctx->fake_mem, 5, 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + + ctx->hw = hw; + ctx->parent = parent; + + return 0; +} + +static void clk_gate_test_exit(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + + clk_hw_unregister_gate(ctx->hw); + clk_hw_unregister_fixed_rate(ctx->parent); +} + +static struct kunit_suite clk_gate_test_suite = { + .name = "clk-gate-test", + .init = clk_gate_test_init, + .exit = clk_gate_test_exit, + .test_cases = clk_gate_test_cases, +}; + +static void clk_gate_test_invert_enable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = 0; + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + + KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent)); +} + +static void clk_gate_test_invert_disable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = 0; + u32 disable_val = BIT(15); + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg); + + clk_disable_unprepare(clk); + KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent)); +} + +static struct kunit_case clk_gate_test_invert_cases[] = { + KUNIT_CASE(clk_gate_test_invert_enable), + KUNIT_CASE(clk_gate_test_invert_disable), + {} +}; + +static int clk_gate_test_invert_init(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 2000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + ctx->fake_reg = BIT(15); /* Default to off */ + hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0, + ctx->fake_mem, 15, + CLK_GATE_SET_TO_DISABLE, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + + ctx->hw = hw; + ctx->parent = parent; + + return 0; +} + +static struct kunit_suite clk_gate_test_invert_suite = { + .name = "clk-gate-invert-test", + .init = clk_gate_test_invert_init, + .exit = clk_gate_test_exit, + .test_cases = clk_gate_test_invert_cases, +}; + +static void clk_gate_test_hiword_enable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = BIT(9) | BIT(9 + 16); + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + + KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent)); +} + +static void clk_gate_test_hiword_disable(struct kunit *test) +{ + struct clk_gate_test_context *ctx = test->priv; + struct clk_hw *parent = ctx->parent; + struct clk_hw *hw = ctx->hw; + struct clk *clk = hw->clk; + u32 enable_val = BIT(9) | BIT(9 + 16); + u32 disable_val = BIT(9 + 16); + + KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0); + KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg); + + clk_disable_unprepare(clk); + KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent)); + KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent)); +} + +static struct kunit_case clk_gate_test_hiword_cases[] = { + KUNIT_CASE(clk_gate_test_hiword_enable), + KUNIT_CASE(clk_gate_test_hiword_disable), + {} +}; + +static int clk_gate_test_hiword_init(struct kunit *test) +{ + struct clk_hw *parent; + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0, + 2000000); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0, + ctx->fake_mem, 9, + CLK_GATE_HIWORD_MASK, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + + ctx->hw = hw; + ctx->parent = parent; + + return 0; +} + +static struct kunit_suite clk_gate_test_hiword_suite = { + .name = "clk-gate-hiword-test", + .init = clk_gate_test_hiword_init, + .exit = clk_gate_test_exit, + .test_cases = clk_gate_test_hiword_cases, +}; + +static void clk_gate_test_is_enabled(struct kunit *test) +{ + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + ctx->fake_reg = BIT(7); + hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 7, + 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + KUNIT_ASSERT_TRUE(test, clk_hw_is_enabled(hw)); + + clk_hw_unregister_gate(hw); +} + +static void clk_gate_test_is_disabled(struct kunit *test) +{ + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + ctx->fake_reg = BIT(4); + hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 7, + 0, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + KUNIT_ASSERT_FALSE(test, clk_hw_is_enabled(hw)); + + clk_hw_unregister_gate(hw); +} + +static void clk_gate_test_is_enabled_inverted(struct kunit *test) +{ + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + ctx->fake_reg = BIT(31); + hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 2, + CLK_GATE_SET_TO_DISABLE, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + KUNIT_ASSERT_TRUE(test, clk_hw_is_enabled(hw)); + + clk_hw_unregister_gate(hw); +} + +static void clk_gate_test_is_disabled_inverted(struct kunit *test) +{ + struct clk_hw *hw; + struct clk_gate_test_context *ctx; + + ctx = clk_gate_test_alloc_ctx(test); + ctx->fake_reg = BIT(29); + hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 29, + CLK_GATE_SET_TO_DISABLE, NULL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw); + KUNIT_ASSERT_FALSE(test, clk_hw_is_enabled(hw)); + + clk_hw_unregister_gate(hw); +} + +static struct kunit_case clk_gate_test_enabled_cases[] = { + KUNIT_CASE(clk_gate_test_is_enabled), + KUNIT_CASE(clk_gate_test_is_disabled), + KUNIT_CASE(clk_gate_test_is_enabled_inverted), + KUNIT_CASE(clk_gate_test_is_disabled_inverted), + {} +}; + +static struct kunit_suite clk_gate_test_enabled_suite = { + .name = "clk-gate-is_enabled-test", + .test_cases = clk_gate_test_enabled_cases, +}; + +kunit_test_suites( + &clk_gate_register_test_suite, + &clk_gate_test_suite, + &clk_gate_test_invert_suite, + &clk_gate_test_hiword_suite, + &clk_gate_test_enabled_suite +); +MODULE_LICENSE("GPL v2"); |