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clk: gate: Add devm_clk_hw_register_gate() 

Add devm_clk_hw_register_gate() - devres-managed version of
clk_hw_register_gate()

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103085102.1656081-2-horatiu.vultur@microchip.com
This commit is contained in:
Horatiu Vultur 2021-11-03 09:50:59 +01:00 committed by Nicolas Ferre
parent 54104ee023
commit 815f0e738a
2 changed files with 58 additions and 0 deletions
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35
drivers/clk/clk-gate.c
View File

@ -7,6 +7,7 @@
*/
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
@ -222,3 +223,37 @@ void clk_hw_unregister_gate(struct clk_hw *hw)
kfree(gate);
}
EXPORT_SYMBOL_GPL(clk_hw_unregister_gate);
static void devm_clk_hw_release_gate(struct device *dev, void *res)
{
clk_hw_unregister_gate(*(struct clk_hw **)res);
}
struct clk_hw *__devm_clk_hw_register_gate(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 bit_idx,
u8 clk_gate_flags, spinlock_t *lock)
{
struct clk_hw **ptr, *hw;
ptr = devres_alloc(devm_clk_hw_release_gate, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
hw = __clk_hw_register_gate(dev, np, name, parent_name, parent_hw,
parent_data, flags, reg, bit_idx,
clk_gate_flags, lock);
if (!IS_ERR(hw)) {
*ptr = hw;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return hw;
}
EXPORT_SYMBOL_GPL(__devm_clk_hw_register_gate);

23
include/linux/clk-provider.h
View File

@ -490,6 +490,13 @@ struct clk_hw *__clk_hw_register_gate(struct device *dev,
unsigned long flags,
void __iomem *reg, u8 bit_idx,
u8 clk_gate_flags, spinlock_t *lock);
struct clk_hw *__devm_clk_hw_register_gate(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 bit_idx,
u8 clk_gate_flags, spinlock_t *lock);
struct clk *clk_register_gate(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 bit_idx,
@ -544,6 +551,22 @@ struct clk *clk_register_gate(struct device *dev, const char *name,
__clk_hw_register_gate((dev), NULL, (name), NULL, NULL, (parent_data), \
(flags), (reg), (bit_idx), \
(clk_gate_flags), (lock))
/**
* devm_clk_hw_register_gate - register a gate clock with the clock framework
* @dev: device that is registering this clock
* @name: name of this clock
* @parent_name: name of this clock's parent
* @flags: framework-specific flags for this clock
* @reg: register address to control gating of this clock
* @bit_idx: which bit in the register controls gating of this clock
* @clk_gate_flags: gate-specific flags for this clock
* @lock: shared register lock for this clock
*/
#define devm_clk_hw_register_gate(dev, name, parent_name, flags, reg, bit_idx,\
clk_gate_flags, lock) \
__devm_clk_hw_register_gate((dev), NULL, (name), (parent_name), NULL, \
NULL, (flags), (reg), (bit_idx), \
(clk_gate_flags), (lock))
void clk_unregister_gate(struct clk *clk);
void clk_hw_unregister_gate(struct clk_hw *hw);
int clk_gate_is_enabled(struct clk_hw *hw);