Commit 265b07df authored by Shradha Todi's avatar Shradha Todi Committed by Stephen Boyd
Browse files

clk: Provide managed helper to get and enable bulk clocks 



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: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: default avatarShradha Todi <shradha.t@samsung.com>
Link: https://lore.kernel.org/r/20240220084046.23786-2-shradha.t@samsung.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 6613476e

drivers/clk/clk-devres.c

+40 −0
Original line number Diff line number Diff line
@@ -182,6 +182,46 @@ int __must_check devm_clk_bulk_get_all(struct device *dev, 
}

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)

{

	struct clk **c = res;

include/linux/clk.h

+22 −0
Original line number Diff line number Diff line
@@ -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,

				       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.

 * @dev: device for clock "consumer"
@@ -968,6 +984,12 @@ static inline int __must_check devm_clk_bulk_get_all(struct device *dev, 
	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,

				struct device_node *np, const char *con_id)

{