Test that clks registered with 'struct clk_parent_data' work as intended and can find their parents.
Cc: Christian Marangi ansuelsmth@gmail.com Cc: Brendan Higgins brendan.higgins@linux.dev Cc: David Gow davidgow@google.com Cc: Rae Moar rmoar@google.com Signed-off-by: Stephen Boyd sboyd@kernel.org --- drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 3 +- drivers/clk/clk_parent_data_test.h | 10 + drivers/clk/clk_test.c | 451 +++++++++++++++++++- drivers/clk/kunit_clk_parent_data_test.dtso | 28 ++ 5 files changed, 491 insertions(+), 2 deletions(-) create mode 100644 drivers/clk/clk_parent_data_test.h create mode 100644 drivers/clk/kunit_clk_parent_data_test.dtso
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 6e66d04dd11d..755333c77298 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -507,6 +507,7 @@ config CLK_KUNIT_TEST tristate "Basic Clock Framework Kunit Tests" if !KUNIT_ALL_TESTS depends on KUNIT default KUNIT_ALL_TESTS + select OF_OVERLAY if OF help Kunit tests for the common clock framework.
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 816abac45fbd..990e87ee4f92 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -2,7 +2,8 @@ # common clock types obj-$(CONFIG_HAVE_CLK) += clk-devres.o clk-bulk.o clkdev.o obj-$(CONFIG_COMMON_CLK) += clk.o -obj-$(CONFIG_CLK_KUNIT_TEST) += clk_test.o +obj-$(CONFIG_CLK_KUNIT_TEST) += clk_test.o \ + kunit_clk_parent_data_test.dtbo.o obj-$(CONFIG_COMMON_CLK) += clk-divider.o obj-$(CONFIG_COMMON_CLK) += clk-fixed-factor.o obj-$(CONFIG_COMMON_CLK) += clk-fixed-rate.o diff --git a/drivers/clk/clk_parent_data_test.h b/drivers/clk/clk_parent_data_test.h new file mode 100644 index 000000000000..eedd53ae910d --- /dev/null +++ b/drivers/clk/clk_parent_data_test.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _CLK_PARENT_DATA_TEST_H +#define _CLK_PARENT_DATA_TEST_H + +#define CLK_PARENT_DATA_1MHZ_NAME "1mhz_fixed_legacy" +#define CLK_PARENT_DATA_PARENT1 "parent_fwname" +#define CLK_PARENT_DATA_PARENT2 "50" +#define CLK_PARENT_DATA_50MHZ_NAME "50_clk" + +#endif diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c index 39e2b5ff4f51..655bf0909fb7 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -4,12 +4,19 @@ */ #include <linux/clk.h> #include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/platform_device.h>
/* Needed for clk_hw_get_clk() */ #include "clk.h"
+#include <kunit/clk.h> +#include <kunit/of.h> +#include <kunit/platform_device.h> #include <kunit/test.h>
+#include "clk_parent_data_test.h" + static const struct clk_ops empty_clk_ops = { };
#define DUMMY_CLOCK_INIT_RATE (42 * 1000 * 1000) @@ -2659,6 +2666,446 @@ static struct kunit_suite clk_mux_no_reparent_test_suite = { .test_cases = clk_mux_no_reparent_test_cases, };
+struct clk_register_clk_parent_data_test_case { + const char *desc; + struct clk_parent_data pdata; +}; + +static void +clk_register_clk_parent_data_test_case_to_desc( + const struct clk_register_clk_parent_data_test_case *t, char *desc) +{ + strcpy(desc, t->desc); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_of_cases[] = { + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::index. + */ + .desc = "clk_parent_data_of_index_test", + .pdata.index = 0, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::fwname. + */ + .desc = "clk_parent_data_of_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::name. + */ + .desc = "clk_parent_data_of_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_1MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct + * clk_parent_data::{fw_name,name}. + */ + .desc = "clk_parent_data_of_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct clk_parent_data::{index,name}. + * Index takes priority. + */ + .desc = "clk_parent_data_of_index_name_priority_test", + .pdata.index = 0, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device_node can + * find a parent based on struct + * clk_parent_data::{index,fwname,name}. The fw_name takes + * priority over index and name. + */ + .desc = "clk_parent_data_of_index_fwname_name_priority_test", + .pdata.index = 1, + .pdata.fw_name = CLK_PARENT_DATA_PARENT1, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_of_test, clk_register_clk_parent_data_of_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/** + * struct clk_register_clk_parent_data_of_ctx - Context for clk_parent_data OF tests + * @np: device node of clk under test + * @hw: clk_hw for clk under test + */ +struct clk_register_clk_parent_data_of_ctx { + struct device_node *np; + struct clk_hw hw; +}; + +static int clk_register_clk_parent_data_of_test_init(struct kunit *test) +{ + struct clk_register_clk_parent_data_of_ctx *ctx; + + KUNIT_ASSERT_EQ(test, 0, + of_overlay_apply_kunit(test, kunit_clk_parent_data_test)); + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + test->priv = ctx; + + ctx->np = of_find_compatible_node(NULL, NULL, "test,clk-parent-data"); + if (!ctx->np) + return -ENODEV; + + return kunit_add_action_or_reset(test, (kunit_action_t *)&of_node_put, ctx->np); +} + +/* + * Test that a clk registered with a struct device_node can find a parent based on + * struct clk_parent_data when the hw member isn't set. + */ +static void clk_register_clk_parent_data_of_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_of_ctx *ctx = test->priv; + struct clk_hw *parent_hw; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_init_data init = { }; + struct clk *expected_parent, *actual_parent; + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->np); + + expected_parent = of_clk_get_kunit(test, ctx->np, 0); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, expected_parent); + + test_param = test->param_value; + init.parent_data = &test_param->pdata; + init.num_parents = 1; + init.name = "parent_data_of_test_clk"; + init.ops = &clk_dummy_single_parent_ops; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, of_clk_hw_register_kunit(test, ctx->np, &ctx->hw)); + + parent_hw = clk_hw_get_parent(&ctx->hw); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent_hw); + + actual_parent = clk_hw_get_clk_kunit(test, parent_hw, __func__); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, actual_parent); + + KUNIT_EXPECT_TRUE(test, clk_is_match(expected_parent, actual_parent)); +} + +static struct kunit_case clk_register_clk_parent_data_of_test_cases[] = { + KUNIT_CASE_PARAM(clk_register_clk_parent_data_of_test, + clk_register_clk_parent_data_of_test_gen_params), + {} +}; + +/* + * Test suite for registering clks with struct clk_parent_data and a struct + * device_node. + */ +static struct kunit_suite clk_register_clk_parent_data_of_suite = { + .name = "clk_register_clk_parent_data_of", + .init = clk_register_clk_parent_data_of_test_init, + .test_cases = clk_register_clk_parent_data_of_test_cases, +}; + +/** + * struct clk_register_clk_parent_data_device_ctx - Context for clk_parent_data device tests + * @dev: device of clk under test + * @hw: clk_hw for clk under test + * @pdrv: driver to attach to find @dev + */ +struct clk_register_clk_parent_data_device_ctx { + struct device *dev; + struct clk_hw hw; + struct platform_driver pdrv; +}; + +static inline struct clk_register_clk_parent_data_device_ctx * +clk_register_clk_parent_data_driver_to_test_context(struct platform_device *pdev) +{ + return container_of(to_platform_driver(pdev->dev.driver), + struct clk_register_clk_parent_data_device_ctx, pdrv); +} + +static int clk_register_clk_parent_data_device_probe(struct platform_device *pdev) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + + ctx = clk_register_clk_parent_data_driver_to_test_context(pdev); + ctx->dev = &pdev->dev; + + return 0; +} + +static void clk_register_clk_parent_data_device_driver(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx = test->priv; + static const struct of_device_id match_table[] = { + { .compatible = "test,clk-parent-data" }, + { } + }; + + ctx->pdrv.probe = clk_register_clk_parent_data_device_probe; + ctx->pdrv.driver.of_match_table = match_table; + ctx->pdrv.driver.name = __func__; + ctx->pdrv.driver.owner = THIS_MODULE; + + KUNIT_ASSERT_EQ(test, 0, platform_driver_register_kunit(test, &ctx->pdrv)); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->dev); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_device_cases[] = { + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::index. + */ + .desc = "clk_parent_data_device_index_test", + .pdata.index = 1, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::fwname. + */ + .desc = "clk_parent_data_device_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::name. + */ + .desc = "clk_parent_data_device_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_50MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{fw_name,name}. + */ + .desc = "clk_parent_data_device_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{index,name}. Index + * takes priority. + */ + .desc = "clk_parent_data_device_index_name_priority_test", + .pdata.index = 1, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::{index,fwname,name}. + * The fw_name takes priority over index and name. + */ + .desc = "clk_parent_data_device_index_fwname_name_priority_test", + .pdata.index = 0, + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_device_test, + clk_register_clk_parent_data_device_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/* + * Test that a clk registered with a struct device can find a parent based on + * struct clk_parent_data when the hw member isn't set. + */ +static void clk_register_clk_parent_data_device_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_hw *parent_hw; + struct clk_init_data init = { }; + struct clk *expected_parent, *actual_parent; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + test->priv = ctx; + + clk_register_clk_parent_data_device_driver(test); + + expected_parent = clk_get_kunit(test, ctx->dev, "50"); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, expected_parent); + + test_param = test->param_value; + init.parent_data = &test_param->pdata; + init.num_parents = 1; + init.name = "parent_data_device_test_clk"; + init.ops = &clk_dummy_single_parent_ops; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, &ctx->hw)); + + parent_hw = clk_hw_get_parent(&ctx->hw); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent_hw); + + actual_parent = clk_hw_get_clk_kunit(test, parent_hw, __func__); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, actual_parent); + + KUNIT_EXPECT_TRUE(test, clk_is_match(expected_parent, actual_parent)); +} + +static const struct clk_register_clk_parent_data_test_case +clk_register_clk_parent_data_device_hw_cases[] = { + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw. + */ + .desc = "clk_parent_data_device_hw_index_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when + * struct clk_parent_data::fw_name is set. + */ + .desc = "clk_parent_data_device_hw_fwname_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::name is set. + */ + .desc = "clk_parent_data_device_hw_name_test", + /* The index must be negative to indicate firmware not used */ + .pdata.index = -1, + .pdata.name = CLK_PARENT_DATA_50MHZ_NAME, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::{fw_name,name} are set. + */ + .desc = "clk_parent_data_device_hw_fwname_name_test", + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when struct + * clk_parent_data::index is set. The hw pointer takes + * priority. + */ + .desc = "clk_parent_data_device_hw_index_priority_test", + .pdata.index = 0, + }, + { + /* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw when + * struct clk_parent_data::{index,fwname,name} are set. + * The hw pointer takes priority over everything else. + */ + .desc = "clk_parent_data_device_hw_index_fwname_name_priority_test", + .pdata.index = 0, + .pdata.fw_name = CLK_PARENT_DATA_PARENT2, + .pdata.name = "not_matching", + }, +}; + +KUNIT_ARRAY_PARAM(clk_register_clk_parent_data_device_hw_test, + clk_register_clk_parent_data_device_hw_cases, + clk_register_clk_parent_data_test_case_to_desc) + +/* + * Test that a clk registered with a struct device can find a + * parent based on struct clk_parent_data::hw. + */ +static void clk_register_clk_parent_data_device_hw_test(struct kunit *test) +{ + struct clk_register_clk_parent_data_device_ctx *ctx; + const struct clk_register_clk_parent_data_test_case *test_param; + struct clk_dummy_context *parent; + struct clk_hw *parent_hw; + struct clk_parent_data pdata = { }; + struct clk_init_data init = { }; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + test->priv = ctx; + + clk_register_clk_parent_data_device_driver(test); + + parent = kunit_kzalloc(test, sizeof(*parent), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + + parent_hw = &parent->hw; + parent_hw->init = CLK_HW_INIT_NO_PARENT("parent-clk", + &clk_dummy_rate_ops, 0); + + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, parent_hw)); + + test_param = test->param_value; + memcpy(&pdata, &test_param->pdata, sizeof(pdata)); + pdata.hw = parent_hw; + init.parent_data = &pdata; + init.num_parents = 1; + init.ops = &clk_dummy_single_parent_ops; + init.name = "parent_data_device_hw_test_clk"; + ctx->hw.init = &init; + KUNIT_ASSERT_EQ(test, 0, clk_hw_register_kunit(test, ctx->dev, &ctx->hw)); + + KUNIT_EXPECT_PTR_EQ(test, parent_hw, clk_hw_get_parent(&ctx->hw)); +} + +static struct kunit_case clk_register_clk_parent_data_device_test_cases[] = { + KUNIT_CASE_PARAM(clk_register_clk_parent_data_device_test, + clk_register_clk_parent_data_device_test_gen_params), + KUNIT_CASE_PARAM(clk_register_clk_parent_data_device_hw_test, + clk_register_clk_parent_data_device_hw_test_gen_params), + {} +}; + +static int clk_register_clk_parent_data_device_init(struct kunit *test) +{ + KUNIT_ASSERT_EQ(test, 0, + of_overlay_apply_kunit(test, kunit_clk_parent_data_test)); + + return 0; +} + +/* + * Test suite for registering clks with struct clk_parent_data and a struct + * device. + */ +static struct kunit_suite clk_register_clk_parent_data_device_suite = { + .name = "clk_register_clk_parent_data_device", + .init = clk_register_clk_parent_data_device_init, + .test_cases = clk_register_clk_parent_data_device_test_cases, +}; + kunit_test_suites( &clk_leaf_mux_set_rate_parent_test_suite, &clk_test_suite, @@ -2671,7 +3118,9 @@ kunit_test_suites( &clk_range_test_suite, &clk_range_maximize_test_suite, &clk_range_minimize_test_suite, + &clk_register_clk_parent_data_of_suite, + &clk_register_clk_parent_data_device_suite, &clk_single_parent_mux_test_suite, - &clk_uncached_test_suite + &clk_uncached_test_suite, ); MODULE_LICENSE("GPL v2"); diff --git a/drivers/clk/kunit_clk_parent_data_test.dtso b/drivers/clk/kunit_clk_parent_data_test.dtso new file mode 100644 index 000000000000..7d3ed9a5a2e8 --- /dev/null +++ b/drivers/clk/kunit_clk_parent_data_test.dtso @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +#include "clk_parent_data_test.h" + +&{/} { + fixed_50: kunit-clock-50MHz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <50000000>; + clock-output-names = CLK_PARENT_DATA_50MHZ_NAME; + }; + + fixed_parent: kunit-clock-1MHz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <1000000>; + clock-output-names = CLK_PARENT_DATA_1MHZ_NAME; + }; + + kunit-clock-controller { + compatible = "test,clk-parent-data"; + clocks = <&fixed_parent>, <&fixed_50>; + clock-names = CLK_PARENT_DATA_PARENT1, CLK_PARENT_DATA_PARENT2; + #clock-cells = <1>; + }; +};