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Diffstat (limited to 'kernel/Documentation/hwspinlock.txt')
| -rw-r--r-- | kernel/Documentation/hwspinlock.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/Documentation/hwspinlock.txt b/kernel/Documentation/hwspinlock.txt index 62f7d4ea6..61c1ee98e 100644 --- a/kernel/Documentation/hwspinlock.txt +++ b/kernel/Documentation/hwspinlock.txt @@ -48,6 +48,16 @@ independent, drivers. ids for predefined purposes. Should be called from a process context (might sleep). + int of_hwspin_lock_get_id(struct device_node *np, int index); + - retrieve the global lock id for an OF phandle-based specific lock. + This function provides a means for DT users of a hwspinlock module + to get the global lock id of a specific hwspinlock, so that it can + be requested using the normal hwspin_lock_request_specific() API. + The function returns a lock id number on success, -EPROBE_DEFER if + the hwspinlock device is not yet registered with the core, or other + error values. + Should be called from a process context (might sleep). + int hwspin_lock_free(struct hwspinlock *hwlock); - free a previously-assigned hwspinlock; returns 0 on success, or an appropriate error code on failure (e.g. -EINVAL if the hwspinlock |