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clk: Provide managed helper to get and enable bulk clocks

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Provide a managed devm_clk_bulk* wrapper to get and enable all
bulk clocks in order to simplify drivers that keeps all clocks
enabled for the time of driver operation.

Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Shradha Todi <shradha.t@samsung.com>
Link: https://lore.kernel.org/r/20240220084046.23786-2-shradha.t@samsung.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Shradha Todi 2024-02-20 14:10:45 +05:30 committed by Stephen Boyd
parent 6613476e22
commit 265b07df75
2 changed files with 62 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

40
drivers/clk/clk-devres.c
View file

@ -182,6 +182,46 @@ int __must_check devm_clk_bulk_get_all(struct device *dev,
} }
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all); EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
static void devm_clk_bulk_release_all_enable(struct device *dev, void *res)
{
struct clk_bulk_devres *devres = res;
clk_bulk_disable_unprepare(devres->num_clks, devres->clks);
clk_bulk_put_all(devres->num_clks, devres->clks);
}
int __must_check devm_clk_bulk_get_all_enable(struct device *dev,
struct clk_bulk_data **clks)
{
struct clk_bulk_devres *devres;
int ret;
devres = devres_alloc(devm_clk_bulk_release_all_enable,
sizeof(*devres), GFP_KERNEL);
if (!devres)
return -ENOMEM;
ret = clk_bulk_get_all(dev, &devres->clks);
if (ret > 0) {
*clks = devres->clks;
devres->num_clks = ret;
} else {
devres_free(devres);
return ret;
}
ret = clk_bulk_prepare_enable(devres->num_clks, *clks);
if (!ret) {
devres_add(dev, devres);
} else {
clk_bulk_put_all(devres->num_clks, devres->clks);
devres_free(devres);
}
return ret;
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all_enable);
static int devm_clk_match(struct device *dev, void *res, void *data) static int devm_clk_match(struct device *dev, void *res, void *data)
{ {
struct clk **c = res; struct clk **c = res;

22
include/linux/clk.h
View file

@ -478,6 +478,22 @@ int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
int __must_check devm_clk_bulk_get_all(struct device *dev, int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks); struct clk_bulk_data **clks);
/**
* devm_clk_bulk_get_all_enable - Get and enable all clocks of the consumer (managed)
* @dev: device for clock "consumer"
* @clks: pointer to the clk_bulk_data table of consumer
*
* Returns success (0) or negative errno.
*
* This helper function allows drivers to get all clocks of the
* consumer and enables them in one operation with management.
* The clks will automatically be disabled and freed when the device
* is unbound.
*/
int __must_check devm_clk_bulk_get_all_enable(struct device *dev,
struct clk_bulk_data **clks);
/** /**
* devm_clk_get - lookup and obtain a managed reference to a clock producer. * devm_clk_get - lookup and obtain a managed reference to a clock producer.
* @dev: device for clock "consumer" * @dev: device for clock "consumer"
@ -968,6 +984,12 @@ static inline int __must_check devm_clk_bulk_get_all(struct device *dev,
return 0; return 0;
} }
static inline int __must_check devm_clk_bulk_get_all_enable(struct device *dev,
struct clk_bulk_data **clks)
{
return 0;
}
static inline struct clk *devm_get_clk_from_child(struct device *dev, static inline struct clk *devm_get_clk_from_child(struct device *dev,
struct device_node *np, const char *con_id) struct device_node *np, const char *con_id)
{ {