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![Stephen Boyd](/assets/img/avatar_default.png)
Transform the existing clk_leaf_mux_set_rate_parent test into a parameterized test that calls the various determine rate APIs that exist for clk providers. This ensures that whatever determine rate API is used by a clk provider will return the correct parent in the best_parent_hw pointer of the clk_rate_request because clk_rate_requests are forwarded properly. Cc: Guenter Roeck <linux@roeck-us.net> Cc: Maxime Ripard <mripard@kernel.org> Link: https://lore.kernel.org/r/20230912175534.2427862-3-sboyd@kernel.org Acked-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2677 lines
73 KiB
C
2677 lines
73 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Kunit test for clk rate management
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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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/* Needed for clk_hw_get_clk() */
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#include "clk.h"
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#include <kunit/test.h>
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static const struct clk_ops empty_clk_ops = { };
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#define DUMMY_CLOCK_INIT_RATE (42 * 1000 * 1000)
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#define DUMMY_CLOCK_RATE_1 (142 * 1000 * 1000)
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#define DUMMY_CLOCK_RATE_2 (242 * 1000 * 1000)
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struct clk_dummy_context {
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struct clk_hw hw;
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unsigned long rate;
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};
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static unsigned long clk_dummy_recalc_rate(struct clk_hw *hw,
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unsigned long parent_rate)
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{
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struct clk_dummy_context *ctx =
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container_of(hw, struct clk_dummy_context, hw);
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return ctx->rate;
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}
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static int clk_dummy_determine_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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/* Just return the same rate without modifying it */
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return 0;
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}
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static int clk_dummy_maximize_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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/*
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* If there's a maximum set, always run the clock at the maximum
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* allowed.
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*/
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if (req->max_rate < ULONG_MAX)
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req->rate = req->max_rate;
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return 0;
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}
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static int clk_dummy_minimize_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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/*
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* If there's a minimum set, always run the clock at the minimum
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* allowed.
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*/
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if (req->min_rate > 0)
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req->rate = req->min_rate;
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return 0;
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}
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static int clk_dummy_set_rate(struct clk_hw *hw,
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unsigned long rate,
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unsigned long parent_rate)
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{
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struct clk_dummy_context *ctx =
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container_of(hw, struct clk_dummy_context, hw);
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ctx->rate = rate;
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return 0;
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}
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static int clk_dummy_single_set_parent(struct clk_hw *hw, u8 index)
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{
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if (index >= clk_hw_get_num_parents(hw))
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return -EINVAL;
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return 0;
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}
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static u8 clk_dummy_single_get_parent(struct clk_hw *hw)
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{
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return 0;
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}
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static const struct clk_ops clk_dummy_rate_ops = {
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.recalc_rate = clk_dummy_recalc_rate,
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.determine_rate = clk_dummy_determine_rate,
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.set_rate = clk_dummy_set_rate,
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};
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static const struct clk_ops clk_dummy_maximize_rate_ops = {
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.recalc_rate = clk_dummy_recalc_rate,
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.determine_rate = clk_dummy_maximize_rate,
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.set_rate = clk_dummy_set_rate,
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};
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static const struct clk_ops clk_dummy_minimize_rate_ops = {
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.recalc_rate = clk_dummy_recalc_rate,
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.determine_rate = clk_dummy_minimize_rate,
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.set_rate = clk_dummy_set_rate,
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};
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static const struct clk_ops clk_dummy_single_parent_ops = {
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/*
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* FIXME: Even though we should probably be able to use
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* __clk_mux_determine_rate() here, if we use it and call
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* clk_round_rate() or clk_set_rate() with a rate lower than
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* what all the parents can provide, it will return -EINVAL.
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*
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* This is due to the fact that it has the undocumented
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* behaviour to always pick up the closest rate higher than the
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* requested rate. If we get something lower, it thus considers
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* that it's not acceptable and will return an error.
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*
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* It's somewhat inconsistent and creates a weird threshold
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* between rates above the parent rate which would be rounded to
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* what the parent can provide, but rates below will simply
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* return an error.
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*/
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.determine_rate = __clk_mux_determine_rate_closest,
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.set_parent = clk_dummy_single_set_parent,
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.get_parent = clk_dummy_single_get_parent,
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};
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struct clk_multiple_parent_ctx {
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struct clk_dummy_context parents_ctx[2];
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struct clk_hw hw;
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u8 current_parent;
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};
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static int clk_multiple_parents_mux_set_parent(struct clk_hw *hw, u8 index)
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{
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struct clk_multiple_parent_ctx *ctx =
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container_of(hw, struct clk_multiple_parent_ctx, hw);
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if (index >= clk_hw_get_num_parents(hw))
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return -EINVAL;
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ctx->current_parent = index;
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return 0;
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}
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static u8 clk_multiple_parents_mux_get_parent(struct clk_hw *hw)
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{
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struct clk_multiple_parent_ctx *ctx =
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container_of(hw, struct clk_multiple_parent_ctx, hw);
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return ctx->current_parent;
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}
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static const struct clk_ops clk_multiple_parents_mux_ops = {
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.get_parent = clk_multiple_parents_mux_get_parent,
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.set_parent = clk_multiple_parents_mux_set_parent,
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.determine_rate = __clk_mux_determine_rate_closest,
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};
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static const struct clk_ops clk_multiple_parents_no_reparent_mux_ops = {
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.determine_rate = clk_hw_determine_rate_no_reparent,
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.get_parent = clk_multiple_parents_mux_get_parent,
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.set_parent = clk_multiple_parents_mux_set_parent,
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};
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static int clk_test_init_with_ops(struct kunit *test, const struct clk_ops *ops)
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{
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struct clk_dummy_context *ctx;
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struct clk_init_data init = { };
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int ret;
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ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->rate = DUMMY_CLOCK_INIT_RATE;
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test->priv = ctx;
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init.name = "test_dummy_rate";
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init.ops = ops;
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ctx->hw.init = &init;
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ret = clk_hw_register(NULL, &ctx->hw);
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if (ret)
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return ret;
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return 0;
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}
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static int clk_test_init(struct kunit *test)
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{
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return clk_test_init_with_ops(test, &clk_dummy_rate_ops);
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}
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static int clk_maximize_test_init(struct kunit *test)
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{
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return clk_test_init_with_ops(test, &clk_dummy_maximize_rate_ops);
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}
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static int clk_minimize_test_init(struct kunit *test)
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{
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return clk_test_init_with_ops(test, &clk_dummy_minimize_rate_ops);
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}
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static void clk_test_exit(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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clk_hw_unregister(&ctx->hw);
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}
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/*
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* Test that the actual rate matches what is returned by clk_get_rate()
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*/
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static void clk_test_get_rate(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, ctx->rate);
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clk_put(clk);
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}
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/*
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* Test that, after a call to clk_set_rate(), the rate returned by
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* clk_get_rate() matches.
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*
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* This assumes that clk_ops.determine_rate or clk_ops.round_rate won't
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* modify the requested rate, which is our case in clk_dummy_rate_ops.
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*/
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static void clk_test_set_get_rate(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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KUNIT_ASSERT_EQ(test,
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clk_set_rate(clk, DUMMY_CLOCK_RATE_1),
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0);
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
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clk_put(clk);
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}
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/*
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* Test that, after several calls to clk_set_rate(), the rate returned
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* by clk_get_rate() matches the last one.
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*
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* This assumes that clk_ops.determine_rate or clk_ops.round_rate won't
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* modify the requested rate, which is our case in clk_dummy_rate_ops.
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*/
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static void clk_test_set_set_get_rate(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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KUNIT_ASSERT_EQ(test,
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clk_set_rate(clk, DUMMY_CLOCK_RATE_1),
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0);
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KUNIT_ASSERT_EQ(test,
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clk_set_rate(clk, DUMMY_CLOCK_RATE_2),
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0);
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
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clk_put(clk);
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}
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/*
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* Test that clk_round_rate and clk_set_rate are consitent and will
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* return the same frequency.
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*/
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static void clk_test_round_set_get_rate(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long set_rate;
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long rounded_rate;
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rounded_rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1);
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KUNIT_ASSERT_GT(test, rounded_rate, 0);
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KUNIT_EXPECT_EQ(test, rounded_rate, DUMMY_CLOCK_RATE_1);
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KUNIT_ASSERT_EQ(test,
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clk_set_rate(clk, DUMMY_CLOCK_RATE_1),
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0);
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set_rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, set_rate, 0);
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KUNIT_EXPECT_EQ(test, rounded_rate, set_rate);
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clk_put(clk);
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}
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static struct kunit_case clk_test_cases[] = {
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KUNIT_CASE(clk_test_get_rate),
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KUNIT_CASE(clk_test_set_get_rate),
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KUNIT_CASE(clk_test_set_set_get_rate),
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KUNIT_CASE(clk_test_round_set_get_rate),
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{}
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};
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/*
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* Test suite for a basic rate clock, without any parent.
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*
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* These tests exercise the rate API with simple scenarios
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*/
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static struct kunit_suite clk_test_suite = {
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.name = "clk-test",
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.init = clk_test_init,
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.exit = clk_test_exit,
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.test_cases = clk_test_cases,
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};
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static int clk_uncached_test_init(struct kunit *test)
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{
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struct clk_dummy_context *ctx;
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int ret;
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ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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test->priv = ctx;
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ctx->rate = DUMMY_CLOCK_INIT_RATE;
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ctx->hw.init = CLK_HW_INIT_NO_PARENT("test-clk",
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&clk_dummy_rate_ops,
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CLK_GET_RATE_NOCACHE);
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ret = clk_hw_register(NULL, &ctx->hw);
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if (ret)
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return ret;
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return 0;
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}
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/*
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* Test that for an uncached clock, the clock framework doesn't cache
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* the rate and clk_get_rate() will return the underlying clock rate
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* even if it changed.
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*/
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static void clk_test_uncached_get_rate(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE);
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/* We change the rate behind the clock framework's back */
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ctx->rate = DUMMY_CLOCK_RATE_1;
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
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clk_put(clk);
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}
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/*
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* Test that for an uncached clock, clk_set_rate_range() will work
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* properly if the rate hasn't changed.
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*/
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static void clk_test_uncached_set_range(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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KUNIT_ASSERT_EQ(test,
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clk_set_rate_range(clk,
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DUMMY_CLOCK_RATE_1,
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DUMMY_CLOCK_RATE_2),
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0);
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
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KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
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clk_put(clk);
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}
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/*
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* Test that for an uncached clock, clk_set_rate_range() will work
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* properly if the rate has changed in hardware.
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*
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* In this case, it means that if the rate wasn't initially in the range
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* we're trying to set, but got changed at some point into the range
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* without the kernel knowing about it, its rate shouldn't be affected.
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*/
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static void clk_test_uncached_updated_rate_set_range(struct kunit *test)
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{
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struct clk_dummy_context *ctx = test->priv;
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struct clk_hw *hw = &ctx->hw;
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struct clk *clk = clk_hw_get_clk(hw, NULL);
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unsigned long rate;
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/* We change the rate behind the clock framework's back */
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ctx->rate = DUMMY_CLOCK_RATE_1 + 1000;
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KUNIT_ASSERT_EQ(test,
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clk_set_rate_range(clk,
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DUMMY_CLOCK_RATE_1,
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DUMMY_CLOCK_RATE_2),
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0);
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rate = clk_get_rate(clk);
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KUNIT_ASSERT_GT(test, rate, 0);
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
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clk_put(clk);
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}
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static struct kunit_case clk_uncached_test_cases[] = {
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KUNIT_CASE(clk_test_uncached_get_rate),
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KUNIT_CASE(clk_test_uncached_set_range),
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KUNIT_CASE(clk_test_uncached_updated_rate_set_range),
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{}
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};
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/*
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* Test suite for a basic, uncached, rate clock, without any parent.
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*
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* These tests exercise the rate API with simple scenarios
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*/
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static struct kunit_suite clk_uncached_test_suite = {
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.name = "clk-uncached-test",
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.init = clk_uncached_test_init,
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.exit = clk_test_exit,
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.test_cases = clk_uncached_test_cases,
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};
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static int
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clk_multiple_parents_mux_test_init(struct kunit *test)
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{
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struct clk_multiple_parent_ctx *ctx;
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const char *parents[2] = { "parent-0", "parent-1"};
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int ret;
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ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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test->priv = ctx;
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ctx->parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0",
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&clk_dummy_rate_ops,
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0);
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ctx->parents_ctx[0].rate = DUMMY_CLOCK_RATE_1;
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ret = clk_hw_register(NULL, &ctx->parents_ctx[0].hw);
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if (ret)
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return ret;
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ctx->parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1",
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&clk_dummy_rate_ops,
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0);
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ctx->parents_ctx[1].rate = DUMMY_CLOCK_RATE_2;
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ret = clk_hw_register(NULL, &ctx->parents_ctx[1].hw);
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if (ret)
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return ret;
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ctx->current_parent = 0;
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ctx->hw.init = CLK_HW_INIT_PARENTS("test-mux", parents,
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&clk_multiple_parents_mux_ops,
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CLK_SET_RATE_PARENT);
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ret = clk_hw_register(NULL, &ctx->hw);
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if (ret)
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return ret;
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return 0;
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}
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static void
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clk_multiple_parents_mux_test_exit(struct kunit *test)
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{
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struct clk_multiple_parent_ctx *ctx = test->priv;
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clk_hw_unregister(&ctx->hw);
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clk_hw_unregister(&ctx->parents_ctx[0].hw);
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clk_hw_unregister(&ctx->parents_ctx[1].hw);
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}
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/*
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* Test that for a clock with multiple parents, clk_get_parent()
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* actually returns the current one.
|
|
*/
|
|
static void
|
|
clk_test_multiple_parents_mux_get_parent(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL);
|
|
|
|
KUNIT_EXPECT_TRUE(test, clk_is_match(clk_get_parent(clk), parent));
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock with a multiple parents, clk_has_parent()
|
|
* actually reports all of them as parents.
|
|
*/
|
|
static void
|
|
clk_test_multiple_parents_mux_has_parent(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL);
|
|
KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent));
|
|
clk_put(parent);
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent));
|
|
clk_put(parent);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock with a multiple parents, if we set a range on
|
|
* that clock and the parent is changed, its rate after the reparenting
|
|
* is still within the range we asked for.
|
|
*
|
|
* FIXME: clk_set_parent() only does the reparenting but doesn't
|
|
* reevaluate whether the new clock rate is within its boundaries or
|
|
* not.
|
|
*/
|
|
static void
|
|
clk_test_multiple_parents_mux_set_range_set_parent_get_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent1, *parent2;
|
|
unsigned long rate;
|
|
int ret;
|
|
|
|
kunit_skip(test, "This needs to be fixed in the core.");
|
|
|
|
parent1 = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent1);
|
|
KUNIT_ASSERT_TRUE(test, clk_is_match(clk_get_parent(clk), parent1));
|
|
|
|
parent2 = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent2);
|
|
|
|
ret = clk_set_rate(parent1, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate(parent2, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1 - 1000,
|
|
DUMMY_CLOCK_RATE_1 + 1000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_parent(clk, parent2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
|
|
clk_put(parent2);
|
|
clk_put(parent1);
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_multiple_parents_mux_test_cases[] = {
|
|
KUNIT_CASE(clk_test_multiple_parents_mux_get_parent),
|
|
KUNIT_CASE(clk_test_multiple_parents_mux_has_parent),
|
|
KUNIT_CASE(clk_test_multiple_parents_mux_set_range_set_parent_get_rate),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic mux clock with two parents, with
|
|
* CLK_SET_RATE_PARENT on the child.
|
|
*
|
|
* These tests exercise the consumer API and check that the state of the
|
|
* child and parents are sane and consistent.
|
|
*/
|
|
static struct kunit_suite
|
|
clk_multiple_parents_mux_test_suite = {
|
|
.name = "clk-multiple-parents-mux-test",
|
|
.init = clk_multiple_parents_mux_test_init,
|
|
.exit = clk_multiple_parents_mux_test_exit,
|
|
.test_cases = clk_multiple_parents_mux_test_cases,
|
|
};
|
|
|
|
static int
|
|
clk_orphan_transparent_multiple_parent_mux_test_init(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx;
|
|
const char *parents[2] = { "missing-parent", "proper-parent"};
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
ctx->parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("proper-parent",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->parents_ctx[1].rate = DUMMY_CLOCK_INIT_RATE;
|
|
ret = clk_hw_register(NULL, &ctx->parents_ctx[1].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->hw.init = CLK_HW_INIT_PARENTS("test-orphan-mux", parents,
|
|
&clk_multiple_parents_mux_ops,
|
|
CLK_SET_RATE_PARENT);
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clk_orphan_transparent_multiple_parent_mux_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
|
|
clk_hw_unregister(&ctx->hw);
|
|
clk_hw_unregister(&ctx->parents_ctx[1].hw);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux whose current parent hasn't been registered yet and is
|
|
* thus orphan, clk_get_parent() will return NULL.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_get_parent(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
|
|
KUNIT_EXPECT_PTR_EQ(test, clk_get_parent(clk), NULL);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux whose current parent hasn't been registered yet,
|
|
* calling clk_set_parent() to a valid parent will properly update the
|
|
* mux parent and its orphan status.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent, *new_parent;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
new_parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
KUNIT_EXPECT_TRUE(test, clk_is_match(parent, new_parent));
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan but got switched to a valid
|
|
* parent, calling clk_drop_range() on the mux won't affect the parent
|
|
* rate.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent_drop_range(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
unsigned long parent_rate, new_parent_rate;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_drop_range(clk);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
new_parent_rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, new_parent_rate, 0);
|
|
KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate);
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan but got switched to a valid
|
|
* parent, the rate of the mux and its new parent are consistent.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent_get_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
unsigned long parent_rate, rate;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, parent_rate, rate);
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan but got switched to a valid
|
|
* parent, calling clk_put() on the mux won't affect the parent rate.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent_put(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk *clk, *parent;
|
|
unsigned long parent_rate, new_parent_rate;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
clk = clk_hw_get_clk(&ctx->hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, clk);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
clk_put(clk);
|
|
|
|
new_parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, new_parent_rate, 0);
|
|
KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate);
|
|
|
|
clk_put(parent);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan but got switched to a valid
|
|
* parent, calling clk_set_rate_range() will affect the parent state if
|
|
* its rate is out of range.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_modified(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
unsigned long rate;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan but got switched to a valid
|
|
* parent, calling clk_set_rate_range() won't affect the parent state if
|
|
* its rate is within range.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_untouched(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
unsigned long parent_rate, new_parent_rate;
|
|
int ret;
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_INIT_RATE - 1000,
|
|
DUMMY_CLOCK_INIT_RATE + 1000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
new_parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, new_parent_rate, 0);
|
|
KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate);
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux whose current parent hasn't been registered yet,
|
|
* calling clk_set_rate_range() will succeed, and will be taken into
|
|
* account when rounding a rate.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_range_round_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
long rate;
|
|
int ret;
|
|
|
|
ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a mux that started orphan, was assigned and rate and
|
|
* then got switched to a valid parent, its rate is eventually within
|
|
* range.
|
|
*
|
|
* FIXME: Even though we update the rate as part of clk_set_parent(), we
|
|
* don't evaluate whether that new rate is within range and needs to be
|
|
* adjusted.
|
|
*/
|
|
static void
|
|
clk_test_orphan_transparent_multiple_parent_mux_set_range_set_parent_get_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
unsigned long rate;
|
|
int ret;
|
|
|
|
kunit_skip(test, "This needs to be fixed in the core.");
|
|
|
|
clk_hw_set_rate_range(hw, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
|
|
parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
|
|
|
|
ret = clk_set_parent(clk, parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_orphan_transparent_multiple_parent_mux_test_cases[] = {
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_get_parent),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_drop_range),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_get_rate),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_put),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_modified),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_untouched),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_range_round_rate),
|
|
KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_range_set_parent_get_rate),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic mux clock with two parents. The default parent
|
|
* isn't registered, only the second parent is. By default, the clock
|
|
* will thus be orphan.
|
|
*
|
|
* These tests exercise the behaviour of the consumer API when dealing
|
|
* with an orphan clock, and how we deal with the transition to a valid
|
|
* parent.
|
|
*/
|
|
static struct kunit_suite clk_orphan_transparent_multiple_parent_mux_test_suite = {
|
|
.name = "clk-orphan-transparent-multiple-parent-mux-test",
|
|
.init = clk_orphan_transparent_multiple_parent_mux_test_init,
|
|
.exit = clk_orphan_transparent_multiple_parent_mux_test_exit,
|
|
.test_cases = clk_orphan_transparent_multiple_parent_mux_test_cases,
|
|
};
|
|
|
|
struct clk_single_parent_ctx {
|
|
struct clk_dummy_context parent_ctx;
|
|
struct clk_hw hw;
|
|
};
|
|
|
|
static int clk_single_parent_mux_test_init(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx;
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
ctx->parent_ctx.rate = DUMMY_CLOCK_INIT_RATE;
|
|
ctx->parent_ctx.hw.init =
|
|
CLK_HW_INIT_NO_PARENT("parent-clk",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
|
|
ret = clk_hw_register(NULL, &ctx->parent_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->hw.init = CLK_HW_INIT("test-clk", "parent-clk",
|
|
&clk_dummy_single_parent_ops,
|
|
CLK_SET_RATE_PARENT);
|
|
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clk_single_parent_mux_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
|
|
clk_hw_unregister(&ctx->hw);
|
|
clk_hw_unregister(&ctx->parent_ctx.hw);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock with a single parent, clk_get_parent() actually
|
|
* returns the parent.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_get_parent(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent = clk_hw_get_clk(&ctx->parent_ctx.hw, NULL);
|
|
|
|
KUNIT_EXPECT_TRUE(test, clk_is_match(clk_get_parent(clk), parent));
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock with a single parent, clk_has_parent() actually
|
|
* reports it as a parent.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_has_parent(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent = clk_hw_get_clk(&ctx->parent_ctx.hw, NULL);
|
|
|
|
KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent));
|
|
|
|
clk_put(parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock that can't modify its rate and with a single
|
|
* parent, if we set disjoints range on the parent and then the child,
|
|
* the second will return an error.
|
|
*
|
|
* FIXME: clk_set_rate_range() only considers the current clock when
|
|
* evaluating whether ranges are disjoints and not the upstream clocks
|
|
* ranges.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_set_range_disjoint_child_last(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
int ret;
|
|
|
|
kunit_skip(test, "This needs to be fixed in the core.");
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
ret = clk_set_rate_range(parent, 1000, 2000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk, 3000, 4000);
|
|
KUNIT_EXPECT_LT(test, ret, 0);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock that can't modify its rate and with a single
|
|
* parent, if we set disjoints range on the child and then the parent,
|
|
* the second will return an error.
|
|
*
|
|
* FIXME: clk_set_rate_range() only considers the current clock when
|
|
* evaluating whether ranges are disjoints and not the downstream clocks
|
|
* ranges.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_set_range_disjoint_parent_last(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
int ret;
|
|
|
|
kunit_skip(test, "This needs to be fixed in the core.");
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
ret = clk_set_rate_range(clk, 1000, 2000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(parent, 3000, 4000);
|
|
KUNIT_EXPECT_LT(test, ret, 0);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock that can't modify its rate and with a single
|
|
* parent, if we set a range on the parent and then call
|
|
* clk_round_rate(), the boundaries of the parent are taken into
|
|
* account.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_set_range_round_rate_parent_only(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
long rate;
|
|
int ret;
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock that can't modify its rate and with a single
|
|
* parent, if we set a range on the parent and a more restrictive one on
|
|
* the child, and then call clk_round_rate(), the boundaries of the
|
|
* two clocks are taken into account.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_set_range_round_rate_child_smaller(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
long rate;
|
|
int ret;
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1 + 1000, DUMMY_CLOCK_RATE_2 - 1000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that for a clock that can't modify its rate and with a single
|
|
* parent, if we set a range on the child and a more restrictive one on
|
|
* the parent, and then call clk_round_rate(), the boundaries of the
|
|
* two clocks are taken into account.
|
|
*/
|
|
static void
|
|
clk_test_single_parent_mux_set_range_round_rate_parent_smaller(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *parent;
|
|
long rate;
|
|
int ret;
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1 + 1000, DUMMY_CLOCK_RATE_2 - 1000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_single_parent_mux_test_cases[] = {
|
|
KUNIT_CASE(clk_test_single_parent_mux_get_parent),
|
|
KUNIT_CASE(clk_test_single_parent_mux_has_parent),
|
|
KUNIT_CASE(clk_test_single_parent_mux_set_range_disjoint_child_last),
|
|
KUNIT_CASE(clk_test_single_parent_mux_set_range_disjoint_parent_last),
|
|
KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_child_smaller),
|
|
KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_parent_only),
|
|
KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_parent_smaller),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic mux clock with one parent, with
|
|
* CLK_SET_RATE_PARENT on the child.
|
|
*
|
|
* These tests exercise the consumer API and check that the state of the
|
|
* child and parent are sane and consistent.
|
|
*/
|
|
static struct kunit_suite
|
|
clk_single_parent_mux_test_suite = {
|
|
.name = "clk-single-parent-mux-test",
|
|
.init = clk_single_parent_mux_test_init,
|
|
.exit = clk_single_parent_mux_test_exit,
|
|
.test_cases = clk_single_parent_mux_test_cases,
|
|
};
|
|
|
|
static int clk_orphan_transparent_single_parent_mux_test_init(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx;
|
|
struct clk_init_data init = { };
|
|
const char * const parents[] = { "orphan_parent" };
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
init.name = "test_orphan_dummy_parent";
|
|
init.ops = &clk_dummy_single_parent_ops;
|
|
init.parent_names = parents;
|
|
init.num_parents = ARRAY_SIZE(parents);
|
|
init.flags = CLK_SET_RATE_PARENT;
|
|
ctx->hw.init = &init;
|
|
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
memset(&init, 0, sizeof(init));
|
|
init.name = "orphan_parent";
|
|
init.ops = &clk_dummy_rate_ops;
|
|
ctx->parent_ctx.hw.init = &init;
|
|
ctx->parent_ctx.rate = DUMMY_CLOCK_INIT_RATE;
|
|
|
|
ret = clk_hw_register(NULL, &ctx->parent_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Test that a mux-only clock, with an initial rate within a range,
|
|
* will still have the same rate after the range has been enforced.
|
|
*
|
|
* See:
|
|
* https://lore.kernel.org/linux-clk/7720158d-10a7-a17b-73a4-a8615c9c6d5c@collabora.com/
|
|
*/
|
|
static void clk_test_orphan_transparent_parent_mux_set_range(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate, new_rate;
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
ctx->parent_ctx.rate - 1000,
|
|
ctx->parent_ctx.rate + 1000),
|
|
0);
|
|
|
|
new_rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, new_rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, new_rate);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_orphan_transparent_single_parent_mux_test_cases[] = {
|
|
KUNIT_CASE(clk_test_orphan_transparent_parent_mux_set_range),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic mux clock with one parent. The parent is
|
|
* registered after its child. The clock will thus be an orphan when
|
|
* registered, but will no longer be when the tests run.
|
|
*
|
|
* These tests make sure a clock that used to be orphan has a sane,
|
|
* consistent, behaviour.
|
|
*/
|
|
static struct kunit_suite clk_orphan_transparent_single_parent_test_suite = {
|
|
.name = "clk-orphan-transparent-single-parent-test",
|
|
.init = clk_orphan_transparent_single_parent_mux_test_init,
|
|
.exit = clk_single_parent_mux_test_exit,
|
|
.test_cases = clk_orphan_transparent_single_parent_mux_test_cases,
|
|
};
|
|
|
|
struct clk_single_parent_two_lvl_ctx {
|
|
struct clk_dummy_context parent_parent_ctx;
|
|
struct clk_dummy_context parent_ctx;
|
|
struct clk_hw hw;
|
|
};
|
|
|
|
static int
|
|
clk_orphan_two_level_root_last_test_init(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_two_lvl_ctx *ctx;
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
ctx->parent_ctx.hw.init =
|
|
CLK_HW_INIT("intermediate-parent",
|
|
"root-parent",
|
|
&clk_dummy_single_parent_ops,
|
|
CLK_SET_RATE_PARENT);
|
|
ret = clk_hw_register(NULL, &ctx->parent_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->hw.init =
|
|
CLK_HW_INIT("test-clk", "intermediate-parent",
|
|
&clk_dummy_single_parent_ops,
|
|
CLK_SET_RATE_PARENT);
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->parent_parent_ctx.rate = DUMMY_CLOCK_INIT_RATE;
|
|
ctx->parent_parent_ctx.hw.init =
|
|
CLK_HW_INIT_NO_PARENT("root-parent",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ret = clk_hw_register(NULL, &ctx->parent_parent_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clk_orphan_two_level_root_last_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_two_lvl_ctx *ctx = test->priv;
|
|
|
|
clk_hw_unregister(&ctx->hw);
|
|
clk_hw_unregister(&ctx->parent_ctx.hw);
|
|
clk_hw_unregister(&ctx->parent_parent_ctx.hw);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a clock whose parent used to be orphan, clk_get_rate()
|
|
* will return the proper rate.
|
|
*/
|
|
static void
|
|
clk_orphan_two_level_root_last_test_get_rate(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_two_lvl_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that, for a clock whose parent used to be orphan,
|
|
* clk_set_rate_range() won't affect its rate if it is already within
|
|
* range.
|
|
*
|
|
* See (for Exynos 4210):
|
|
* https://lore.kernel.org/linux-clk/366a0232-bb4a-c357-6aa8-636e398e05eb@samsung.com/
|
|
*/
|
|
static void
|
|
clk_orphan_two_level_root_last_test_set_range(struct kunit *test)
|
|
{
|
|
struct clk_single_parent_two_lvl_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
int ret;
|
|
|
|
ret = clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_INIT_RATE - 1000,
|
|
DUMMY_CLOCK_INIT_RATE + 1000);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case
|
|
clk_orphan_two_level_root_last_test_cases[] = {
|
|
KUNIT_CASE(clk_orphan_two_level_root_last_test_get_rate),
|
|
KUNIT_CASE(clk_orphan_two_level_root_last_test_set_range),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic, transparent, clock with a parent that is also
|
|
* such a clock. The parent's parent is registered last, while the
|
|
* parent and its child are registered in that order. The intermediate
|
|
* and leaf clocks will thus be orphan when registered, but the leaf
|
|
* clock itself will always have its parent and will never be
|
|
* reparented. Indeed, it's only orphan because its parent is.
|
|
*
|
|
* These tests exercise the behaviour of the consumer API when dealing
|
|
* with an orphan clock, and how we deal with the transition to a valid
|
|
* parent.
|
|
*/
|
|
static struct kunit_suite
|
|
clk_orphan_two_level_root_last_test_suite = {
|
|
.name = "clk-orphan-two-level-root-last-test",
|
|
.init = clk_orphan_two_level_root_last_test_init,
|
|
.exit = clk_orphan_two_level_root_last_test_exit,
|
|
.test_cases = clk_orphan_two_level_root_last_test_cases,
|
|
};
|
|
|
|
/*
|
|
* Test that clk_set_rate_range won't return an error for a valid range
|
|
* and that it will make sure the rate of the clock is within the
|
|
* boundaries.
|
|
*/
|
|
static void clk_range_test_set_range(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that calling clk_set_rate_range with a minimum rate higher than
|
|
* the maximum rate returns an error.
|
|
*/
|
|
static void clk_range_test_set_range_invalid(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
|
|
KUNIT_EXPECT_LT(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1 + 1000,
|
|
DUMMY_CLOCK_RATE_1),
|
|
0);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that users can't set multiple, disjoints, range that would be
|
|
* impossible to meet.
|
|
*/
|
|
static void clk_range_test_multiple_disjoints_range(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *user1, *user2;
|
|
|
|
user1 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1);
|
|
|
|
user2 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user1, 1000, 2000),
|
|
0);
|
|
|
|
KUNIT_EXPECT_LT(test,
|
|
clk_set_rate_range(user2, 3000, 4000),
|
|
0);
|
|
|
|
clk_put(user2);
|
|
clk_put(user1);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to round a rate
|
|
* lower than the minimum, the returned rate will be within range.
|
|
*/
|
|
static void clk_range_test_set_range_round_rate_lower(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to set a rate
|
|
* higher than the maximum, the new rate will be within range.
|
|
*/
|
|
static void clk_range_test_set_range_set_rate_lower(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to round and
|
|
* set a rate lower than the minimum, the rate returned by
|
|
* clk_round_rate() will be consistent with the new rate set by
|
|
* clk_set_rate().
|
|
*/
|
|
static void clk_range_test_set_range_set_round_rate_consistent_lower(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
long rounded;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rounded = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000);
|
|
KUNIT_ASSERT_GT(test, rounded, 0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000),
|
|
0);
|
|
|
|
KUNIT_EXPECT_EQ(test, rounded, clk_get_rate(clk));
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to round a rate
|
|
* higher than the maximum, the returned rate will be within range.
|
|
*/
|
|
static void clk_range_test_set_range_round_rate_higher(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to set a rate
|
|
* higher than the maximum, the new rate will be within range.
|
|
*/
|
|
static void clk_range_test_set_range_set_rate_higher(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has some boundaries and we try to round and
|
|
* set a rate higher than the maximum, the rate returned by
|
|
* clk_round_rate() will be consistent with the new rate set by
|
|
* clk_set_rate().
|
|
*/
|
|
static void clk_range_test_set_range_set_round_rate_consistent_higher(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
long rounded;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rounded = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000);
|
|
KUNIT_ASSERT_GT(test, rounded, 0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
KUNIT_EXPECT_EQ(test, rounded, clk_get_rate(clk));
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has a rate lower than the minimum set by a
|
|
* call to clk_set_rate_range(), the rate will be raised to match the
|
|
* new minimum.
|
|
*
|
|
* This assumes that clk_ops.determine_rate or clk_ops.round_rate won't
|
|
* modify the requested rate, which is our case in clk_dummy_rate_ops.
|
|
*/
|
|
static void clk_range_test_set_range_get_rate_raised(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if our clock has a rate higher than the maximum set by a
|
|
* call to clk_set_rate_range(), the rate will be lowered to match the
|
|
* new maximum.
|
|
*
|
|
* This assumes that clk_ops.determine_rate or clk_ops.round_rate won't
|
|
* modify the requested rate, which is our case in clk_dummy_rate_ops.
|
|
*/
|
|
static void clk_range_test_set_range_get_rate_lowered(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_range_test_cases[] = {
|
|
KUNIT_CASE(clk_range_test_set_range),
|
|
KUNIT_CASE(clk_range_test_set_range_invalid),
|
|
KUNIT_CASE(clk_range_test_multiple_disjoints_range),
|
|
KUNIT_CASE(clk_range_test_set_range_round_rate_lower),
|
|
KUNIT_CASE(clk_range_test_set_range_set_rate_lower),
|
|
KUNIT_CASE(clk_range_test_set_range_set_round_rate_consistent_lower),
|
|
KUNIT_CASE(clk_range_test_set_range_round_rate_higher),
|
|
KUNIT_CASE(clk_range_test_set_range_set_rate_higher),
|
|
KUNIT_CASE(clk_range_test_set_range_set_round_rate_consistent_higher),
|
|
KUNIT_CASE(clk_range_test_set_range_get_rate_raised),
|
|
KUNIT_CASE(clk_range_test_set_range_get_rate_lowered),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic rate clock, without any parent.
|
|
*
|
|
* These tests exercise the rate range API: clk_set_rate_range(),
|
|
* clk_set_min_rate(), clk_set_max_rate(), clk_drop_range().
|
|
*/
|
|
static struct kunit_suite clk_range_test_suite = {
|
|
.name = "clk-range-test",
|
|
.init = clk_test_init,
|
|
.exit = clk_test_exit,
|
|
.test_cases = clk_range_test_cases,
|
|
};
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), the core will reevaluate whether a new rate is
|
|
* needed each and every time.
|
|
*
|
|
* With clk_dummy_maximize_rate_ops, this means that the rate will
|
|
* trail along the maximum as it evolves.
|
|
*/
|
|
static void clk_range_test_set_range_rate_maximized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2 - 1000),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2 - 1000);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), across multiple users, the core will reevaluate
|
|
* whether a new rate is needed each and every time.
|
|
*
|
|
* With clk_dummy_maximize_rate_ops, this means that the rate will
|
|
* trail along the maximum as it evolves.
|
|
*/
|
|
static void clk_range_test_multiple_set_range_rate_maximized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *user1, *user2;
|
|
unsigned long rate;
|
|
|
|
user1 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1);
|
|
|
|
user2 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user1,
|
|
0,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user2,
|
|
0,
|
|
DUMMY_CLOCK_RATE_1),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_drop_range(user2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(user2);
|
|
clk_put(user1);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), across multiple users, the core will reevaluate
|
|
* whether a new rate is needed, including when a user drop its clock.
|
|
*
|
|
* With clk_dummy_maximize_rate_ops, this means that the rate will
|
|
* trail along the maximum as it evolves.
|
|
*/
|
|
static void clk_range_test_multiple_set_range_rate_put_maximized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *user1, *user2;
|
|
unsigned long rate;
|
|
|
|
user1 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1);
|
|
|
|
user2 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user1,
|
|
0,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user2,
|
|
0,
|
|
DUMMY_CLOCK_RATE_1),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
clk_put(user2);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(user1);
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_range_maximize_test_cases[] = {
|
|
KUNIT_CASE(clk_range_test_set_range_rate_maximized),
|
|
KUNIT_CASE(clk_range_test_multiple_set_range_rate_maximized),
|
|
KUNIT_CASE(clk_range_test_multiple_set_range_rate_put_maximized),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic rate clock, without any parent.
|
|
*
|
|
* These tests exercise the rate range API: clk_set_rate_range(),
|
|
* clk_set_min_rate(), clk_set_max_rate(), clk_drop_range(), with a
|
|
* driver that will always try to run at the highest possible rate.
|
|
*/
|
|
static struct kunit_suite clk_range_maximize_test_suite = {
|
|
.name = "clk-range-maximize-test",
|
|
.init = clk_maximize_test_init,
|
|
.exit = clk_test_exit,
|
|
.test_cases = clk_range_maximize_test_cases,
|
|
};
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), the core will reevaluate whether a new rate is
|
|
* needed each and every time.
|
|
*
|
|
* With clk_dummy_minimize_rate_ops, this means that the rate will
|
|
* trail along the minimum as it evolves.
|
|
*/
|
|
static void clk_range_test_set_range_rate_minimized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
unsigned long rate;
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000),
|
|
0);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1 + 1000,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1 + 1000);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(clk,
|
|
DUMMY_CLOCK_RATE_1,
|
|
DUMMY_CLOCK_RATE_2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), across multiple users, the core will reevaluate
|
|
* whether a new rate is needed each and every time.
|
|
*
|
|
* With clk_dummy_minimize_rate_ops, this means that the rate will
|
|
* trail along the minimum as it evolves.
|
|
*/
|
|
static void clk_range_test_multiple_set_range_rate_minimized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *user1, *user2;
|
|
unsigned long rate;
|
|
|
|
user1 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1);
|
|
|
|
user2 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user1,
|
|
DUMMY_CLOCK_RATE_1,
|
|
ULONG_MAX),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user2,
|
|
DUMMY_CLOCK_RATE_2,
|
|
ULONG_MAX),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_drop_range(user2),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
clk_put(user2);
|
|
clk_put(user1);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if we have several subsequent calls to
|
|
* clk_set_rate_range(), across multiple users, the core will reevaluate
|
|
* whether a new rate is needed, including when a user drop its clock.
|
|
*
|
|
* With clk_dummy_minimize_rate_ops, this means that the rate will
|
|
* trail along the minimum as it evolves.
|
|
*/
|
|
static void clk_range_test_multiple_set_range_rate_put_minimized(struct kunit *test)
|
|
{
|
|
struct clk_dummy_context *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *user1, *user2;
|
|
unsigned long rate;
|
|
|
|
user1 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1);
|
|
|
|
user2 = clk_hw_get_clk(hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user1,
|
|
DUMMY_CLOCK_RATE_1,
|
|
ULONG_MAX),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
KUNIT_ASSERT_EQ(test,
|
|
clk_set_rate_range(user2,
|
|
DUMMY_CLOCK_RATE_2,
|
|
ULONG_MAX),
|
|
0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(user2);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
|
|
clk_put(user1);
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_range_minimize_test_cases[] = {
|
|
KUNIT_CASE(clk_range_test_set_range_rate_minimized),
|
|
KUNIT_CASE(clk_range_test_multiple_set_range_rate_minimized),
|
|
KUNIT_CASE(clk_range_test_multiple_set_range_rate_put_minimized),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a basic rate clock, without any parent.
|
|
*
|
|
* These tests exercise the rate range API: clk_set_rate_range(),
|
|
* clk_set_min_rate(), clk_set_max_rate(), clk_drop_range(), with a
|
|
* driver that will always try to run at the lowest possible rate.
|
|
*/
|
|
static struct kunit_suite clk_range_minimize_test_suite = {
|
|
.name = "clk-range-minimize-test",
|
|
.init = clk_minimize_test_init,
|
|
.exit = clk_test_exit,
|
|
.test_cases = clk_range_minimize_test_cases,
|
|
};
|
|
|
|
struct clk_leaf_mux_ctx {
|
|
struct clk_multiple_parent_ctx mux_ctx;
|
|
struct clk_hw hw;
|
|
struct clk_hw parent;
|
|
struct clk_rate_request *req;
|
|
int (*determine_rate_func)(struct clk_hw *hw, struct clk_rate_request *req);
|
|
};
|
|
|
|
static int clk_leaf_mux_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)
|
|
{
|
|
struct clk_leaf_mux_ctx *ctx = container_of(hw, struct clk_leaf_mux_ctx, hw);
|
|
int ret;
|
|
struct clk_rate_request *parent_req = ctx->req;
|
|
|
|
clk_hw_forward_rate_request(hw, req, req->best_parent_hw, parent_req, req->rate);
|
|
ret = ctx->determine_rate_func(req->best_parent_hw, parent_req);
|
|
if (ret)
|
|
return ret;
|
|
|
|
req->rate = parent_req->rate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct clk_ops clk_leaf_mux_set_rate_parent_ops = {
|
|
.determine_rate = clk_leaf_mux_determine_rate,
|
|
.set_parent = clk_dummy_single_set_parent,
|
|
.get_parent = clk_dummy_single_get_parent,
|
|
};
|
|
|
|
static int
|
|
clk_leaf_mux_set_rate_parent_test_init(struct kunit *test)
|
|
{
|
|
struct clk_leaf_mux_ctx *ctx;
|
|
const char *top_parents[2] = { "parent-0", "parent-1" };
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
ctx->mux_ctx.parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->mux_ctx.parents_ctx[0].rate = DUMMY_CLOCK_RATE_1;
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[0].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->mux_ctx.parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->mux_ctx.parents_ctx[1].rate = DUMMY_CLOCK_RATE_2;
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[1].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->mux_ctx.current_parent = 0;
|
|
ctx->mux_ctx.hw.init = CLK_HW_INIT_PARENTS("test-mux", top_parents,
|
|
&clk_multiple_parents_mux_ops,
|
|
0);
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->parent.init = CLK_HW_INIT_HW("test-parent", &ctx->mux_ctx.hw,
|
|
&empty_clk_ops, CLK_SET_RATE_PARENT);
|
|
ret = clk_hw_register(NULL, &ctx->parent);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->hw.init = CLK_HW_INIT_HW("test-clock", &ctx->parent,
|
|
&clk_leaf_mux_set_rate_parent_ops,
|
|
CLK_SET_RATE_PARENT);
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void clk_leaf_mux_set_rate_parent_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_leaf_mux_ctx *ctx = test->priv;
|
|
|
|
clk_hw_unregister(&ctx->hw);
|
|
clk_hw_unregister(&ctx->parent);
|
|
clk_hw_unregister(&ctx->mux_ctx.hw);
|
|
clk_hw_unregister(&ctx->mux_ctx.parents_ctx[0].hw);
|
|
clk_hw_unregister(&ctx->mux_ctx.parents_ctx[1].hw);
|
|
}
|
|
|
|
struct clk_leaf_mux_set_rate_parent_determine_rate_test_case {
|
|
const char *desc;
|
|
int (*determine_rate_func)(struct clk_hw *hw, struct clk_rate_request *req);
|
|
};
|
|
|
|
static void
|
|
clk_leaf_mux_set_rate_parent_determine_rate_test_case_to_desc(
|
|
const struct clk_leaf_mux_set_rate_parent_determine_rate_test_case *t, char *desc)
|
|
{
|
|
strcpy(desc, t->desc);
|
|
}
|
|
|
|
static const struct clk_leaf_mux_set_rate_parent_determine_rate_test_case
|
|
clk_leaf_mux_set_rate_parent_determine_rate_test_cases[] = {
|
|
{
|
|
/*
|
|
* Test that __clk_determine_rate() on the parent that can't
|
|
* change rate doesn't return a clk_rate_request structure with
|
|
* the best_parent_hw pointer pointing to the parent.
|
|
*/
|
|
.desc = "clk_leaf_mux_set_rate_parent__clk_determine_rate_proper_parent",
|
|
.determine_rate_func = __clk_determine_rate,
|
|
},
|
|
{
|
|
/*
|
|
* Test that __clk_mux_determine_rate() on the parent that
|
|
* can't change rate doesn't return a clk_rate_request
|
|
* structure with the best_parent_hw pointer pointing to
|
|
* the parent.
|
|
*/
|
|
.desc = "clk_leaf_mux_set_rate_parent__clk_mux_determine_rate_proper_parent",
|
|
.determine_rate_func = __clk_mux_determine_rate,
|
|
},
|
|
{
|
|
/*
|
|
* Test that __clk_mux_determine_rate_closest() on the parent
|
|
* that can't change rate doesn't return a clk_rate_request
|
|
* structure with the best_parent_hw pointer pointing to
|
|
* the parent.
|
|
*/
|
|
.desc = "clk_leaf_mux_set_rate_parent__clk_mux_determine_rate_closest_proper_parent",
|
|
.determine_rate_func = __clk_mux_determine_rate_closest,
|
|
},
|
|
{
|
|
/*
|
|
* Test that clk_hw_determine_rate_no_reparent() on the parent
|
|
* that can't change rate doesn't return a clk_rate_request
|
|
* structure with the best_parent_hw pointer pointing to
|
|
* the parent.
|
|
*/
|
|
.desc = "clk_leaf_mux_set_rate_parent_clk_hw_determine_rate_no_reparent_proper_parent",
|
|
.determine_rate_func = clk_hw_determine_rate_no_reparent,
|
|
},
|
|
};
|
|
|
|
KUNIT_ARRAY_PARAM(clk_leaf_mux_set_rate_parent_determine_rate_test,
|
|
clk_leaf_mux_set_rate_parent_determine_rate_test_cases,
|
|
clk_leaf_mux_set_rate_parent_determine_rate_test_case_to_desc)
|
|
|
|
/*
|
|
* Test that when a clk that can't change rate itself calls a function like
|
|
* __clk_determine_rate() on its parent it doesn't get back a clk_rate_request
|
|
* structure that has the best_parent_hw pointer point to the clk_hw passed
|
|
* into the determine rate function. See commit 262ca38f4b6e ("clk: Stop
|
|
* forwarding clk_rate_requests to the parent") for more background.
|
|
*/
|
|
static void clk_leaf_mux_set_rate_parent_determine_rate_test(struct kunit *test)
|
|
{
|
|
struct clk_leaf_mux_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk_rate_request req;
|
|
unsigned long rate;
|
|
const struct clk_leaf_mux_set_rate_parent_determine_rate_test_case *test_param;
|
|
|
|
test_param = test->param_value;
|
|
ctx->determine_rate_func = test_param->determine_rate_func;
|
|
|
|
ctx->req = &req;
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_ASSERT_EQ(test, DUMMY_CLOCK_RATE_2, clk_round_rate(clk, DUMMY_CLOCK_RATE_2));
|
|
|
|
KUNIT_EXPECT_EQ(test, req.rate, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_EXPECT_EQ(test, req.best_parent_rate, DUMMY_CLOCK_RATE_2);
|
|
KUNIT_EXPECT_PTR_EQ(test, req.best_parent_hw, &ctx->mux_ctx.hw);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_leaf_mux_set_rate_parent_test_cases[] = {
|
|
KUNIT_CASE_PARAM(clk_leaf_mux_set_rate_parent_determine_rate_test,
|
|
clk_leaf_mux_set_rate_parent_determine_rate_test_gen_params),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a clock whose parent is a pass-through clk whose parent is a
|
|
* mux with multiple parents. The leaf and pass-through clocks have the
|
|
* CLK_SET_RATE_PARENT flag, and will forward rate requests to the mux, which
|
|
* will then select which parent is the best fit for a given rate.
|
|
*
|
|
* These tests exercise the behaviour of muxes, and the proper selection
|
|
* of parents.
|
|
*/
|
|
static struct kunit_suite clk_leaf_mux_set_rate_parent_test_suite = {
|
|
.name = "clk-leaf-mux-set-rate-parent",
|
|
.init = clk_leaf_mux_set_rate_parent_test_init,
|
|
.exit = clk_leaf_mux_set_rate_parent_test_exit,
|
|
.test_cases = clk_leaf_mux_set_rate_parent_test_cases,
|
|
};
|
|
|
|
struct clk_mux_notifier_rate_change {
|
|
bool done;
|
|
unsigned long old_rate;
|
|
unsigned long new_rate;
|
|
wait_queue_head_t wq;
|
|
};
|
|
|
|
struct clk_mux_notifier_ctx {
|
|
struct clk_multiple_parent_ctx mux_ctx;
|
|
struct clk *clk;
|
|
struct notifier_block clk_nb;
|
|
struct clk_mux_notifier_rate_change pre_rate_change;
|
|
struct clk_mux_notifier_rate_change post_rate_change;
|
|
};
|
|
|
|
#define NOTIFIER_TIMEOUT_MS 100
|
|
|
|
static int clk_mux_notifier_callback(struct notifier_block *nb,
|
|
unsigned long action, void *data)
|
|
{
|
|
struct clk_notifier_data *clk_data = data;
|
|
struct clk_mux_notifier_ctx *ctx = container_of(nb,
|
|
struct clk_mux_notifier_ctx,
|
|
clk_nb);
|
|
|
|
if (action & PRE_RATE_CHANGE) {
|
|
ctx->pre_rate_change.old_rate = clk_data->old_rate;
|
|
ctx->pre_rate_change.new_rate = clk_data->new_rate;
|
|
ctx->pre_rate_change.done = true;
|
|
wake_up_interruptible(&ctx->pre_rate_change.wq);
|
|
}
|
|
|
|
if (action & POST_RATE_CHANGE) {
|
|
ctx->post_rate_change.old_rate = clk_data->old_rate;
|
|
ctx->post_rate_change.new_rate = clk_data->new_rate;
|
|
ctx->post_rate_change.done = true;
|
|
wake_up_interruptible(&ctx->post_rate_change.wq);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int clk_mux_notifier_test_init(struct kunit *test)
|
|
{
|
|
struct clk_mux_notifier_ctx *ctx;
|
|
const char *top_parents[2] = { "parent-0", "parent-1" };
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
ctx->clk_nb.notifier_call = clk_mux_notifier_callback;
|
|
init_waitqueue_head(&ctx->pre_rate_change.wq);
|
|
init_waitqueue_head(&ctx->post_rate_change.wq);
|
|
|
|
ctx->mux_ctx.parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->mux_ctx.parents_ctx[0].rate = DUMMY_CLOCK_RATE_1;
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[0].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->mux_ctx.parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->mux_ctx.parents_ctx[1].rate = DUMMY_CLOCK_RATE_2;
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[1].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->mux_ctx.current_parent = 0;
|
|
ctx->mux_ctx.hw.init = CLK_HW_INIT_PARENTS("test-mux", top_parents,
|
|
&clk_multiple_parents_mux_ops,
|
|
0);
|
|
ret = clk_hw_register(NULL, &ctx->mux_ctx.hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->clk = clk_hw_get_clk(&ctx->mux_ctx.hw, NULL);
|
|
ret = clk_notifier_register(ctx->clk, &ctx->clk_nb);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void clk_mux_notifier_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_mux_notifier_ctx *ctx = test->priv;
|
|
struct clk *clk = ctx->clk;
|
|
|
|
clk_notifier_unregister(clk, &ctx->clk_nb);
|
|
clk_put(clk);
|
|
|
|
clk_hw_unregister(&ctx->mux_ctx.hw);
|
|
clk_hw_unregister(&ctx->mux_ctx.parents_ctx[0].hw);
|
|
clk_hw_unregister(&ctx->mux_ctx.parents_ctx[1].hw);
|
|
}
|
|
|
|
/*
|
|
* Test that if the we have a notifier registered on a mux, the core
|
|
* will notify us when we switch to another parent, and with the proper
|
|
* old and new rates.
|
|
*/
|
|
static void clk_mux_notifier_set_parent_test(struct kunit *test)
|
|
{
|
|
struct clk_mux_notifier_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->mux_ctx.hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *new_parent = clk_hw_get_clk(&ctx->mux_ctx.parents_ctx[1].hw, NULL);
|
|
int ret;
|
|
|
|
ret = clk_set_parent(clk, new_parent);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
ret = wait_event_interruptible_timeout(ctx->pre_rate_change.wq,
|
|
ctx->pre_rate_change.done,
|
|
msecs_to_jiffies(NOTIFIER_TIMEOUT_MS));
|
|
KUNIT_ASSERT_GT(test, ret, 0);
|
|
|
|
KUNIT_EXPECT_EQ(test, ctx->pre_rate_change.old_rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_EQ(test, ctx->pre_rate_change.new_rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
ret = wait_event_interruptible_timeout(ctx->post_rate_change.wq,
|
|
ctx->post_rate_change.done,
|
|
msecs_to_jiffies(NOTIFIER_TIMEOUT_MS));
|
|
KUNIT_ASSERT_GT(test, ret, 0);
|
|
|
|
KUNIT_EXPECT_EQ(test, ctx->post_rate_change.old_rate, DUMMY_CLOCK_RATE_1);
|
|
KUNIT_EXPECT_EQ(test, ctx->post_rate_change.new_rate, DUMMY_CLOCK_RATE_2);
|
|
|
|
clk_put(new_parent);
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_mux_notifier_test_cases[] = {
|
|
KUNIT_CASE(clk_mux_notifier_set_parent_test),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a mux with multiple parents, and a notifier registered
|
|
* on the mux.
|
|
*
|
|
* These tests exercise the behaviour of notifiers.
|
|
*/
|
|
static struct kunit_suite clk_mux_notifier_test_suite = {
|
|
.name = "clk-mux-notifier",
|
|
.init = clk_mux_notifier_test_init,
|
|
.exit = clk_mux_notifier_test_exit,
|
|
.test_cases = clk_mux_notifier_test_cases,
|
|
};
|
|
|
|
static int
|
|
clk_mux_no_reparent_test_init(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx;
|
|
const char *parents[2] = { "parent-0", "parent-1"};
|
|
int ret;
|
|
|
|
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
test->priv = ctx;
|
|
|
|
ctx->parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->parents_ctx[0].rate = DUMMY_CLOCK_RATE_1;
|
|
ret = clk_hw_register(NULL, &ctx->parents_ctx[0].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1",
|
|
&clk_dummy_rate_ops,
|
|
0);
|
|
ctx->parents_ctx[1].rate = DUMMY_CLOCK_RATE_2;
|
|
ret = clk_hw_register(NULL, &ctx->parents_ctx[1].hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ctx->current_parent = 0;
|
|
ctx->hw.init = CLK_HW_INIT_PARENTS("test-mux", parents,
|
|
&clk_multiple_parents_no_reparent_mux_ops,
|
|
0);
|
|
ret = clk_hw_register(NULL, &ctx->hw);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clk_mux_no_reparent_test_exit(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
|
|
clk_hw_unregister(&ctx->hw);
|
|
clk_hw_unregister(&ctx->parents_ctx[0].hw);
|
|
clk_hw_unregister(&ctx->parents_ctx[1].hw);
|
|
}
|
|
|
|
/*
|
|
* Test that if the we have a mux that cannot change parent and we call
|
|
* clk_round_rate() on it with a rate that should cause it to change
|
|
* parent, it won't.
|
|
*/
|
|
static void clk_mux_no_reparent_round_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *other_parent, *parent;
|
|
unsigned long other_parent_rate;
|
|
unsigned long parent_rate;
|
|
long rounded_rate;
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
other_parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, other_parent);
|
|
KUNIT_ASSERT_FALSE(test, clk_is_match(parent, other_parent));
|
|
|
|
other_parent_rate = clk_get_rate(other_parent);
|
|
KUNIT_ASSERT_GT(test, other_parent_rate, 0);
|
|
clk_put(other_parent);
|
|
|
|
rounded_rate = clk_round_rate(clk, other_parent_rate);
|
|
KUNIT_ASSERT_GT(test, rounded_rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rounded_rate, parent_rate);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
/*
|
|
* Test that if the we have a mux that cannot change parent and we call
|
|
* clk_set_rate() on it with a rate that should cause it to change
|
|
* parent, it won't.
|
|
*/
|
|
static void clk_mux_no_reparent_set_rate(struct kunit *test)
|
|
{
|
|
struct clk_multiple_parent_ctx *ctx = test->priv;
|
|
struct clk_hw *hw = &ctx->hw;
|
|
struct clk *clk = clk_hw_get_clk(hw, NULL);
|
|
struct clk *other_parent, *parent;
|
|
unsigned long other_parent_rate;
|
|
unsigned long parent_rate;
|
|
unsigned long rate;
|
|
int ret;
|
|
|
|
parent = clk_get_parent(clk);
|
|
KUNIT_ASSERT_PTR_NE(test, parent, NULL);
|
|
|
|
parent_rate = clk_get_rate(parent);
|
|
KUNIT_ASSERT_GT(test, parent_rate, 0);
|
|
|
|
other_parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL);
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, other_parent);
|
|
KUNIT_ASSERT_FALSE(test, clk_is_match(parent, other_parent));
|
|
|
|
other_parent_rate = clk_get_rate(other_parent);
|
|
KUNIT_ASSERT_GT(test, other_parent_rate, 0);
|
|
clk_put(other_parent);
|
|
|
|
ret = clk_set_rate(clk, other_parent_rate);
|
|
KUNIT_ASSERT_EQ(test, ret, 0);
|
|
|
|
rate = clk_get_rate(clk);
|
|
KUNIT_ASSERT_GT(test, rate, 0);
|
|
KUNIT_EXPECT_EQ(test, rate, parent_rate);
|
|
|
|
clk_put(clk);
|
|
}
|
|
|
|
static struct kunit_case clk_mux_no_reparent_test_cases[] = {
|
|
KUNIT_CASE(clk_mux_no_reparent_round_rate),
|
|
KUNIT_CASE(clk_mux_no_reparent_set_rate),
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Test suite for a clock mux that isn't allowed to change parent, using
|
|
* the clk_hw_determine_rate_no_reparent() helper.
|
|
*
|
|
* These tests exercise that helper, and the proper selection of
|
|
* rates and parents.
|
|
*/
|
|
static struct kunit_suite clk_mux_no_reparent_test_suite = {
|
|
.name = "clk-mux-no-reparent",
|
|
.init = clk_mux_no_reparent_test_init,
|
|
.exit = clk_mux_no_reparent_test_exit,
|
|
.test_cases = clk_mux_no_reparent_test_cases,
|
|
};
|
|
|
|
kunit_test_suites(
|
|
&clk_leaf_mux_set_rate_parent_test_suite,
|
|
&clk_test_suite,
|
|
&clk_multiple_parents_mux_test_suite,
|
|
&clk_mux_no_reparent_test_suite,
|
|
&clk_mux_notifier_test_suite,
|
|
&clk_orphan_transparent_multiple_parent_mux_test_suite,
|
|
&clk_orphan_transparent_single_parent_test_suite,
|
|
&clk_orphan_two_level_root_last_test_suite,
|
|
&clk_range_test_suite,
|
|
&clk_range_maximize_test_suite,
|
|
&clk_range_minimize_test_suite,
|
|
&clk_single_parent_mux_test_suite,
|
|
&clk_uncached_test_suite
|
|
);
|
|
MODULE_LICENSE("GPL v2");
|