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clk: Introduce clk_hw_init_rate_request()

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clk-divider instantiates clk_rate_request internally for its round_rate
implementations to share the code with its determine_rate
implementations.

However, it's missing a few fields (min_rate, max_rate) that would be
initialized properly if it was using clk_core_init_rate_req().

Let's create the clk_hw_init_rate_request() function for clock providers
to be able to share the code to instation clk_rate_requests with the
framework. This will also be useful for some tests introduced in later
patches.

Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> # imx8mp
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> # exynos4210, meson g12b
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220816112530.1837489-17-maxime@cerno.tech
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Maxime Ripard 2022-08-16 13:25:21 +02:00 committed by Stephen Boyd
parent 8cd9c39dce
commit c35e84b097
3 changed files with 36 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/clk/clk-divider.c
View File

@ -386,13 +386,13 @@ long divider_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
const struct clk_div_table *table,
u8 width, unsigned long flags)
{
struct clk_rate_request req = {
.rate = rate,
.best_parent_rate = *prate,
.best_parent_hw = parent,
};
struct clk_rate_request req;
int ret;
clk_hw_init_rate_request(hw, &req, rate);
req.best_parent_rate = *prate;
req.best_parent_hw = parent;
ret = divider_determine_rate(hw, &req, table, width, flags);
if (ret)
return ret;
@ -408,13 +408,13 @@ long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
const struct clk_div_table *table, u8 width,
unsigned long flags, unsigned int val)
{
struct clk_rate_request req = {
.rate = rate,
.best_parent_rate = *prate,
.best_parent_hw = parent,
};
struct clk_rate_request req;
int ret;
clk_hw_init_rate_request(hw, &req, rate);
req.best_parent_rate = *prate;
req.best_parent_hw = parent;
ret = divider_ro_determine_rate(hw, &req, table, width, flags, val);
if (ret)
return ret;

20
drivers/clk/clk.c
View File

@ -1400,6 +1400,26 @@ static void clk_core_init_rate_req(struct clk_core * const core,
}
}
/**
* clk_hw_init_rate_request - Initializes a clk_rate_request
* @hw: the clk for which we want to submit a rate request
* @req: the clk_rate_request structure we want to initialise
* @rate: the rate which is to be requested
*
* Initializes a clk_rate_request structure to submit to
* __clk_determine_rate() or similar functions.
*/
void clk_hw_init_rate_request(const struct clk_hw *hw,
struct clk_rate_request *req,
unsigned long rate)
{
if (WARN_ON(!hw || !req))
return;
clk_core_init_rate_req(hw->core, req, rate);
}
EXPORT_SYMBOL_GPL(clk_hw_init_rate_request);
static bool clk_core_can_round(struct clk_core * const core)
{
return core->ops->determine_rate || core->ops->round_rate;

6
include/linux/clk-provider.h
View File

@ -42,6 +42,8 @@ struct dentry;
* struct clk_rate_request - Structure encoding the clk constraints that
* a clock user might require.
*
* Should be initialized by calling clk_hw_init_rate_request().
*
* @rate: Requested clock rate. This field will be adjusted by
* clock drivers according to hardware capabilities.
* @min_rate: Minimum rate imposed by clk users.
@ -60,6 +62,10 @@ struct clk_rate_request {
struct clk_hw *best_parent_hw;
};
void clk_hw_init_rate_request(const struct clk_hw *hw,
struct clk_rate_request *req,
unsigned long rate);
/**
* struct clk_duty - Struture encoding the duty cycle ratio of a clock
*