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clk: divider: add devm_clk_hw_register_divider_table() 

This will simplify drivers which would only unregister the clk in their
remove() op.

Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20201108185113.31377-6-michael@walle.cc
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Michael Walle 2020-11-08 19:51:09 +01:00 committed by Stephen Boyd
parent 4cb15934ba
commit 26792699fe
2 changed files with 61 additions and 0 deletions
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34
drivers/clk/clk-divider.c
View File

@ -8,6 +8,7 @@
*/
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
@ -578,3 +579,36 @@ void clk_hw_unregister_divider(struct clk_hw *hw)
kfree(div);
}
EXPORT_SYMBOL_GPL(clk_hw_unregister_divider);
static void devm_clk_hw_release_divider(struct device *dev, void *res)
{
clk_hw_unregister_divider(*(struct clk_hw **)res);
}
struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
struct device_node *np, const char *name,
const char *parent_name, const struct clk_hw *parent_hw,
const struct clk_parent_data *parent_data, unsigned long flags,
void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
const struct clk_div_table *table, spinlock_t *lock)
{
struct clk_hw **ptr, *hw;
ptr = devres_alloc(devm_clk_hw_release_divider, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
hw = __clk_hw_register_divider(dev, np, name, parent_name, parent_hw,
parent_data, flags, reg, shift, width,
clk_divider_flags, table, lock);
if (!IS_ERR(hw)) {
*ptr = hw;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return hw;
}
EXPORT_SYMBOL_GPL(__devm_clk_hw_register_divider);

27
include/linux/clk-provider.h
View File

@ -639,6 +639,12 @@ struct clk_hw *__clk_hw_register_divider(struct device *dev,
const struct clk_parent_data *parent_data, unsigned long flags,
void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
const struct clk_div_table *table, spinlock_t *lock);
struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
struct device_node *np, const char *name,
const char *parent_name, const struct clk_hw *parent_hw,
const struct clk_parent_data *parent_data, unsigned long flags,
void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
const struct clk_div_table *table, spinlock_t *lock);
struct clk *clk_register_divider_table(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
@ -779,6 +785,27 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
(parent_data), (flags), (reg), (shift), \
(width), (clk_divider_flags), (table), \
(lock))
/**
* devm_clk_hw_register_divider_table - register a table based divider clock
* with the clock framework (devres variant)
* @dev: device registering this clock
* @name: name of this clock
* @parent_name: name of clock's parent
* @flags: framework-specific flags
* @reg: register address to adjust divider
* @shift: number of bits to shift the bitfield
* @width: width of the bitfield
* @clk_divider_flags: divider-specific flags for this clock
* @table: array of divider/value pairs ending with a div set to 0
* @lock: shared register lock for this clock
*/
#define devm_clk_hw_register_divider_table(dev, name, parent_name, flags, \
reg, shift, width, \
clk_divider_flags, table, lock) \
__devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), \
NULL, NULL, (flags), (reg), (shift), \
(width), (clk_divider_flags), (table), \
(lock))
void clk_unregister_divider(struct clk *clk);
void clk_hw_unregister_divider(struct clk_hw *hw);