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clk: Add a devm variant of clk_rate_exclusive_get()

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This allows to simplify drivers that use clk_rate_exclusive_get()
in their probe routine as calling clk_rate_exclusive_put() is cared for
automatically.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20240104225512.1124519-2-u.kleine-koenig@pengutronix.de
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Uwe Kleine-König 2024-01-04 23:55:11 +01:00 committed by Stephen Boyd
parent 6613476e22
commit b0cde62e4c
2 changed files with 31 additions and 0 deletions
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19
drivers/clk/clk.c
View File

@ -939,6 +939,25 @@ int clk_rate_exclusive_get(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_rate_exclusive_get);
static void devm_clk_rate_exclusive_put(void *data)
{
struct clk *clk = data;
clk_rate_exclusive_put(clk);
}
int devm_clk_rate_exclusive_get(struct device *dev, struct clk *clk)
{
int ret;
ret = clk_rate_exclusive_get(clk);
if (ret)
return ret;
return devm_add_action_or_reset(dev, devm_clk_rate_exclusive_put, clk);
}
EXPORT_SYMBOL_GPL(devm_clk_rate_exclusive_get);
static void clk_core_unprepare(struct clk_core *core)
{
lockdep_assert_held(&prepare_lock);

12
include/linux/clk.h
View File

@ -201,6 +201,18 @@ bool clk_is_match(const struct clk *p, const struct clk *q);
*/
int clk_rate_exclusive_get(struct clk *clk);
/**
* devm_clk_rate_exclusive_get - devm variant of clk_rate_exclusive_get
* @dev: device the exclusivity is bound to
* @clk: clock source
*
* Calls clk_rate_exclusive_get() on @clk and registers a devm cleanup handler
* on @dev to call clk_rate_exclusive_put().
*
* Must not be called from within atomic context.
*/
int devm_clk_rate_exclusive_get(struct device *dev, struct clk *clk);
/**
* clk_rate_exclusive_put - release exclusivity over the rate control of a
* producer