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clk: Add devm_clk_bulk_get_optional() function 

Add managed version of the clk_bulk_get_optional() helper function.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
[sboyd@kernel.org: Mark __devm_clk_bulk_get() static]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
alistair/sunxi64-5.4-dsi
Sylwester Nawrocki 2019-06-19 11:39:26 +02:00 committed by Stephen Boyd
parent 2f25528e4e
commit 9bd5ef0bd8
2 changed files with 47 additions and 3 deletions
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22
drivers/clk/clk-devres.c
View File

@ -52,8 +52,8 @@ static void devm_clk_bulk_release(struct device *dev, void *res)
clk_bulk_put(devres->num_clks, devres->clks);
}
int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
static int __devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks, bool optional)
{
struct clk_bulk_devres *devres;
int ret;
@ -63,7 +63,10 @@ int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
if (!devres)
return -ENOMEM;
ret = clk_bulk_get(dev, num_clks, clks);
if (optional)
ret = clk_bulk_get_optional(dev, num_clks, clks);
else
ret = clk_bulk_get(dev, num_clks, clks);
if (!ret) {
devres->clks = clks;
devres->num_clks = num_clks;
@ -74,8 +77,21 @@ int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
return ret;
}
int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
{
return __devm_clk_bulk_get(dev, num_clks, clks, false);
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
{
return __devm_clk_bulk_get(dev, num_clks, clks, true);
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{

28
include/linux/clk.h
View File

@ -359,6 +359,28 @@ int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
*/
int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks);
/**
* devm_clk_bulk_get_optional - managed get multiple optional consumer clocks
* @dev: device for clock "consumer"
* @clks: pointer to the clk_bulk_data table of consumer
*
* Behaves the same as devm_clk_bulk_get() except where there is no clock
* producer. In this case, instead of returning -ENOENT, the function returns
* NULL for given clk. It is assumed all clocks in clk_bulk_data are optional.
*
* Returns 0 if all clocks specified in clk_bulk_data table are obtained
* successfully or for any clk there was no clk provider available, otherwise
* returns valid IS_ERR() condition containing errno.
* The implementation uses @dev and @clk_bulk_data.id to determine the
* clock consumer, and thereby the clock producer.
* The clock returned is stored in each @clk_bulk_data.clk field.
*
* Drivers must assume that the clock source is not enabled.
*
* clk_bulk_get should not be called from within interrupt context.
*/
int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
struct clk_bulk_data *clks);
/**
* devm_clk_bulk_get_all - managed get multiple clk consumers
* @dev: device for clock "consumer"
@ -760,6 +782,12 @@ static inline int __must_check devm_clk_bulk_get(struct device *dev, int num_clk
return 0;
}
static inline int __must_check devm_clk_bulk_get_optional(struct device *dev,
int num_clks, struct clk_bulk_data *clks)
{
return 0;
}
static inline int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{