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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/clk/clk-gate_test.c
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ...
Diffstat (limited to 'drivers/clk/clk-gate_test.c')
-rw-r--r--drivers/clk/clk-gate_test.c465
1 files changed, 465 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..e276cd974
--- /dev/null
+++ b/drivers/clk/clk-gate_test.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Kunit tests for clk gate
+ */
+#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;
+ __le32 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, le32_to_cpu(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, le32_to_cpu(ctx->fake_reg));
+
+ clk_disable_unprepare(clk);
+ KUNIT_EXPECT_EQ(test, disable_val, le32_to_cpu(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, le32_to_cpu(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, le32_to_cpu(ctx->fake_reg));
+
+ clk_disable_unprepare(clk);
+ KUNIT_EXPECT_EQ(test, disable_val, le32_to_cpu(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 = cpu_to_le32(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, le32_to_cpu(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, le32_to_cpu(ctx->fake_reg));
+
+ clk_disable_unprepare(clk);
+ KUNIT_EXPECT_EQ(test, disable_val, le32_to_cpu(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 = cpu_to_le32(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 = cpu_to_le32(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 = cpu_to_le32(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 = cpu_to_le32(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_DESCRIPTION("Kunit tests for clk gate");
+MODULE_LICENSE("GPL v2");