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clk: Add KUnit tests for clks registered with struct clk_parent_data

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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>
Reviewed-by: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20240718210513.3801024-9-sboyd@kernel.org
This commit is contained in:
Stephen Boyd 2024-07-18 14:05:07 -07:00
parent 5776526beb
commit 274aff8711
5 changed files with 495 additions and 2 deletions
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2
drivers/clk/Kconfig
View File

@ -509,6 +509,8 @@ 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
select DTC
help
Kunit tests for the common clock framework.

4
drivers/clk/Makefile
View File

@ -2,7 +2,9 @@
# 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
clk-test-y := 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

10
drivers/clk/clk_parent_data_test.h Normal file
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@ -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

453
drivers/clk/clk_test.c
View File

@ -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 +2666,448 @@ 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;
of_node_put_kunit(test, ctx->np);
return 0;
}
/*
* 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, kunit_platform_driver_register(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,
@ -2671,8 +3120,10 @@ 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_DESCRIPTION("Kunit tests for clk framework");
MODULE_LICENSE("GPL v2");

28
drivers/clk/kunit_clk_parent_data_test.dtso Normal file
View File

@ -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>;
};
};