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a992acbb21
Test various parts of the clk gate implementation with the kunit testing framework. Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Acked-by: Daniel Latypov <dlatypov@google.com> Cc: <kunit-dev@googlegroups.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20220120175902.2165958-1-sboyd@kernel.org
465 lines
13 KiB
C
465 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Kunit test for clk gate basic type
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*/
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/platform_device.h>
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#include <kunit/test.h>
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static void clk_gate_register_test_dev(struct kunit *test)
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{
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struct clk_hw *ret;
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struct platform_device *pdev;
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pdev = platform_device_register_simple("test_gate_device", -1, NULL, 0);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
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ret = clk_hw_register_gate(&pdev->dev, "test_gate", NULL, 0, NULL,
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0, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret);
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KUNIT_EXPECT_STREQ(test, "test_gate", clk_hw_get_name(ret));
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KUNIT_EXPECT_EQ(test, 0UL, clk_hw_get_flags(ret));
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clk_hw_unregister_gate(ret);
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platform_device_put(pdev);
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}
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static void clk_gate_register_test_parent_names(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *ret;
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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1000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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ret = clk_hw_register_gate(NULL, "test_gate", "test_parent", 0, NULL,
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0, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret);
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KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret));
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clk_hw_unregister_gate(ret);
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clk_hw_unregister_fixed_rate(parent);
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}
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static void clk_gate_register_test_parent_data(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *ret;
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struct clk_parent_data pdata = { };
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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1000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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pdata.hw = parent;
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ret = clk_hw_register_gate_parent_data(NULL, "test_gate", &pdata, 0,
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NULL, 0, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret);
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KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret));
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clk_hw_unregister_gate(ret);
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clk_hw_unregister_fixed_rate(parent);
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}
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static void clk_gate_register_test_parent_data_legacy(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *ret;
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struct clk_parent_data pdata = { };
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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1000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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pdata.name = "test_parent";
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ret = clk_hw_register_gate_parent_data(NULL, "test_gate", &pdata, 0,
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NULL, 0, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret);
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KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret));
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clk_hw_unregister_gate(ret);
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clk_hw_unregister_fixed_rate(parent);
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}
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static void clk_gate_register_test_parent_hw(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *ret;
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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1000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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ret = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0, NULL,
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0, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ret);
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KUNIT_EXPECT_PTR_EQ(test, parent, clk_hw_get_parent(ret));
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clk_hw_unregister_gate(ret);
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clk_hw_unregister_fixed_rate(parent);
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}
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static void clk_gate_register_test_hiword_invalid(struct kunit *test)
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{
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struct clk_hw *ret;
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ret = clk_hw_register_gate(NULL, "test_gate", NULL, 0, NULL,
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20, CLK_GATE_HIWORD_MASK, NULL);
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KUNIT_EXPECT_TRUE(test, IS_ERR(ret));
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}
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static struct kunit_case clk_gate_register_test_cases[] = {
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KUNIT_CASE(clk_gate_register_test_dev),
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KUNIT_CASE(clk_gate_register_test_parent_names),
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KUNIT_CASE(clk_gate_register_test_parent_data),
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KUNIT_CASE(clk_gate_register_test_parent_data_legacy),
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KUNIT_CASE(clk_gate_register_test_parent_hw),
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KUNIT_CASE(clk_gate_register_test_hiword_invalid),
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{}
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};
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static struct kunit_suite clk_gate_register_test_suite = {
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.name = "clk-gate-register-test",
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.test_cases = clk_gate_register_test_cases,
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};
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struct clk_gate_test_context {
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void __iomem *fake_mem;
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struct clk_hw *hw;
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struct clk_hw *parent;
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u32 fake_reg; /* Keep at end, KASAN can detect out of bounds */
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};
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static struct clk_gate_test_context *clk_gate_test_alloc_ctx(struct kunit *test)
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{
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struct clk_gate_test_context *ctx;
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test->priv = ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
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ctx->fake_mem = (void __force __iomem *)&ctx->fake_reg;
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return ctx;
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}
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static void clk_gate_test_parent_rate(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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unsigned long prate = clk_hw_get_rate(parent);
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unsigned long rate = clk_hw_get_rate(hw);
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KUNIT_EXPECT_EQ(test, prate, rate);
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}
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static void clk_gate_test_enable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = BIT(5);
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg);
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent));
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}
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static void clk_gate_test_disable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = BIT(5);
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u32 disable_val = 0;
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg);
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clk_disable_unprepare(clk);
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KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg);
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent));
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}
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static struct kunit_case clk_gate_test_cases[] = {
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KUNIT_CASE(clk_gate_test_parent_rate),
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KUNIT_CASE(clk_gate_test_enable),
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KUNIT_CASE(clk_gate_test_disable),
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{}
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};
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static int clk_gate_test_init(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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2000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0,
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ctx->fake_mem, 5, 0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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ctx->hw = hw;
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ctx->parent = parent;
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return 0;
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}
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static void clk_gate_test_exit(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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clk_hw_unregister_gate(ctx->hw);
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clk_hw_unregister_fixed_rate(ctx->parent);
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}
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static struct kunit_suite clk_gate_test_suite = {
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.name = "clk-gate-test",
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.init = clk_gate_test_init,
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.exit = clk_gate_test_exit,
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.test_cases = clk_gate_test_cases,
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};
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static void clk_gate_test_invert_enable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = 0;
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg);
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent));
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}
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static void clk_gate_test_invert_disable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = 0;
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u32 disable_val = BIT(15);
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg);
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clk_disable_unprepare(clk);
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KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg);
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent));
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}
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static struct kunit_case clk_gate_test_invert_cases[] = {
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KUNIT_CASE(clk_gate_test_invert_enable),
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KUNIT_CASE(clk_gate_test_invert_disable),
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{}
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};
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static int clk_gate_test_invert_init(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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2000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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ctx->fake_reg = BIT(15); /* Default to off */
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hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0,
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ctx->fake_mem, 15,
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CLK_GATE_SET_TO_DISABLE, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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ctx->hw = hw;
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ctx->parent = parent;
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return 0;
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}
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static struct kunit_suite clk_gate_test_invert_suite = {
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.name = "clk-gate-invert-test",
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.init = clk_gate_test_invert_init,
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.exit = clk_gate_test_exit,
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.test_cases = clk_gate_test_invert_cases,
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};
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static void clk_gate_test_hiword_enable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = BIT(9) | BIT(9 + 16);
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_EXPECT_EQ(test, enable_val, ctx->fake_reg);
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_TRUE(test, clk_hw_is_prepared(parent));
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}
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static void clk_gate_test_hiword_disable(struct kunit *test)
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{
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struct clk_gate_test_context *ctx = test->priv;
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struct clk_hw *parent = ctx->parent;
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struct clk_hw *hw = ctx->hw;
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struct clk *clk = hw->clk;
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u32 enable_val = BIT(9) | BIT(9 + 16);
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u32 disable_val = BIT(9 + 16);
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KUNIT_ASSERT_EQ(test, clk_prepare_enable(clk), 0);
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KUNIT_ASSERT_EQ(test, enable_val, ctx->fake_reg);
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clk_disable_unprepare(clk);
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KUNIT_EXPECT_EQ(test, disable_val, ctx->fake_reg);
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(hw));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_enabled(parent));
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KUNIT_EXPECT_FALSE(test, clk_hw_is_prepared(parent));
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}
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static struct kunit_case clk_gate_test_hiword_cases[] = {
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KUNIT_CASE(clk_gate_test_hiword_enable),
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KUNIT_CASE(clk_gate_test_hiword_disable),
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{}
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};
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static int clk_gate_test_hiword_init(struct kunit *test)
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{
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struct clk_hw *parent;
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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parent = clk_hw_register_fixed_rate(NULL, "test_parent", NULL, 0,
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2000000);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
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hw = clk_hw_register_gate_parent_hw(NULL, "test_gate", parent, 0,
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ctx->fake_mem, 9,
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CLK_GATE_HIWORD_MASK, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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ctx->hw = hw;
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ctx->parent = parent;
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return 0;
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}
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static struct kunit_suite clk_gate_test_hiword_suite = {
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.name = "clk-gate-hiword-test",
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.init = clk_gate_test_hiword_init,
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.exit = clk_gate_test_exit,
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.test_cases = clk_gate_test_hiword_cases,
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};
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static void clk_gate_test_is_enabled(struct kunit *test)
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{
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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ctx->fake_reg = BIT(7);
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hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 7,
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0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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KUNIT_ASSERT_TRUE(test, clk_hw_is_enabled(hw));
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clk_hw_unregister_gate(hw);
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}
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static void clk_gate_test_is_disabled(struct kunit *test)
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{
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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ctx->fake_reg = BIT(4);
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hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 7,
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0, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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KUNIT_ASSERT_FALSE(test, clk_hw_is_enabled(hw));
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clk_hw_unregister_gate(hw);
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}
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static void clk_gate_test_is_enabled_inverted(struct kunit *test)
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{
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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ctx->fake_reg = BIT(31);
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hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 2,
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CLK_GATE_SET_TO_DISABLE, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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KUNIT_ASSERT_TRUE(test, clk_hw_is_enabled(hw));
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clk_hw_unregister_gate(hw);
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}
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static void clk_gate_test_is_disabled_inverted(struct kunit *test)
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{
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struct clk_hw *hw;
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struct clk_gate_test_context *ctx;
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ctx = clk_gate_test_alloc_ctx(test);
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ctx->fake_reg = BIT(29);
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hw = clk_hw_register_gate(NULL, "test_gate", NULL, 0, ctx->fake_mem, 29,
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CLK_GATE_SET_TO_DISABLE, NULL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, hw);
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KUNIT_ASSERT_FALSE(test, clk_hw_is_enabled(hw));
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clk_hw_unregister_gate(hw);
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}
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static struct kunit_case clk_gate_test_enabled_cases[] = {
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KUNIT_CASE(clk_gate_test_is_enabled),
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KUNIT_CASE(clk_gate_test_is_disabled),
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KUNIT_CASE(clk_gate_test_is_enabled_inverted),
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KUNIT_CASE(clk_gate_test_is_disabled_inverted),
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{}
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};
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static struct kunit_suite clk_gate_test_enabled_suite = {
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.name = "clk-gate-is_enabled-test",
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.test_cases = clk_gate_test_enabled_cases,
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};
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kunit_test_suites(
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&clk_gate_register_test_suite,
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&clk_gate_test_suite,
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&clk_gate_test_invert_suite,
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&clk_gate_test_hiword_suite,
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&clk_gate_test_enabled_suite
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|
);
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|
MODULE_LICENSE("GPL v2");
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