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hwspinlock updates for v4.19

Browse source 
This introduces devres helpers and an API to request a lock by name,
 then migrates the sprd SPI driver to use these.
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Merge tag 'hwlock-v4.19' of git://github.com/andersson/remoteproc

Pull hwspinlock updates from Bjorn Andersson:
 "This introduces devres helpers and an API to request a lock by name,
  then migrates the sprd SPI driver to use these"

* tag 'hwlock-v4.19' of git://github.com/andersson/remoteproc:
  hwspinlock: Fix incorrect return pointers
  spi: sprd: Change to use devm_hwspin_lock_request_specific()
  spi: sprd: Replace of_hwspin_lock_get_id() with of_hwspin_lock_get_id_byname()
  hwspinlock: Fix one comment mistake
  hwspinlock: Remove redundant config
  hwspinlock: Add devm_xxx() APIs to register/unregister one hwlock controller
  hwspinlock: Add devm_xxx() APIs to request/free hwlock
  hwspinlock: Add one new API to support getting a specific hwlock by the name
This commit is contained in:
Linus Torvalds 2018-08-18 16:45:27 -07:00
commit 7f02e1ce4a
3 changed files with 262 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

37
include/linux/hwspinlock.h
View file

@ -52,7 +52,7 @@ struct hwspinlock_pdata {
int base_id;
};
#if defined(CONFIG_HWSPINLOCK) || defined(CONFIG_HWSPINLOCK_MODULE)
#ifdef CONFIG_HWSPINLOCK
int hwspin_lock_register(struct hwspinlock_device *bank, struct device *dev,
const struct hwspinlock_ops *ops, int base_id, int num_locks);
@ -66,6 +66,17 @@ int __hwspin_lock_timeout(struct hwspinlock *, unsigned int, int,
unsigned long *);
int __hwspin_trylock(struct hwspinlock *, int, unsigned long *);
void __hwspin_unlock(struct hwspinlock *, int, unsigned long *);
int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name);
int devm_hwspin_lock_free(struct device *dev, struct hwspinlock *hwlock);
struct hwspinlock *devm_hwspin_lock_request(struct device *dev);
struct hwspinlock *devm_hwspin_lock_request_specific(struct device *dev,
unsigned int id);
int devm_hwspin_lock_unregister(struct device *dev,
struct hwspinlock_device *bank);
int devm_hwspin_lock_register(struct device *dev,
struct hwspinlock_device *bank,
const struct hwspinlock_ops *ops,
int base_id, int num_locks);
#else /* !CONFIG_HWSPINLOCK */
@ -125,6 +136,30 @@ static inline int hwspin_lock_get_id(struct hwspinlock *hwlock)
return 0;
}
static inline
int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
{
return 0;
}
static inline
int devm_hwspin_lock_free(struct device *dev, struct hwspinlock *hwlock)
{
return 0;
}
static inline struct hwspinlock *devm_hwspin_lock_request(struct device *dev)
{
return ERR_PTR(-ENODEV);
}
static inline
struct hwspinlock *devm_hwspin_lock_request_specific(struct device *dev,
unsigned int id)
{
return ERR_PTR(-ENODEV);
}
#endif /* !CONFIG_HWSPINLOCK */
/**