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Code Issues Releases Wiki Activity

clk: Parameterize clk_leaf_mux_set_rate_parent

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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>
This commit is contained in:
Stephen Boyd 2023-09-12 10:55:31 -07:00
parent 096b256c9a
commit 831187c694
1 changed files with 73 additions and 8 deletions
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81
drivers/clk/clk_test.c
View file

@ -2159,6 +2159,7 @@ struct clk_leaf_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)
@ -2168,7 +2169,7 @@ static int clk_leaf_mux_determine_rate(struct clk_hw *hw, struct clk_rate_reques
struct clk_rate_request *parent_req = ctx->req;
clk_hw_forward_rate_request(hw, req, req->best_parent_hw, parent_req, req->rate);
ret = __clk_determine_rate(req->best_parent_hw, parent_req);
ret = ctx->determine_rate_func(req->best_parent_hw, parent_req);
if (ret)
return ret;
@ -2246,20 +2247,83 @@ static void clk_leaf_mux_set_rate_parent_test_exit(struct kunit *test)
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, for a clock that will forward any rate request to its parent, the
* rate request structure returned by __clk_determine_rate() is sane and
* doesn't have the clk_rate_request's best_parent_hw pointer point to the
* clk_hw passed into __clk_determine_rate(). See commit 262ca38f4b6e ("clk:
* Stop forwarding clk_rate_requests to the parent") for more background.
* 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__clk_determine_rate_proper_parent(struct kunit *test)
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);
@ -2274,7 +2338,8 @@ static void clk_leaf_mux_set_rate_parent__clk_determine_rate_proper_parent(struc
}
static struct kunit_case clk_leaf_mux_set_rate_parent_test_cases[] = {
KUNIT_CASE(clk_leaf_mux_set_rate_parent__clk_determine_rate_proper_parent),
KUNIT_CASE_PARAM(clk_leaf_mux_set_rate_parent_determine_rate_test,
clk_leaf_mux_set_rate_parent_determine_rate_test_gen_params),
{}
};