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| author | Suman Anna <s-anna@ti.com> | 2015-03-04 20:01:14 -0600 |
|---|---|---|
| committer | Ohad Ben-Cohen <ohad@wizery.com> | 2015-05-02 09:54:30 +0300 |
| commit | fb7737e949e31d8a71acee6bbb670f32dbd2a2c0 (patch) | |
| tree | 57ba40cfa05ca8a34211f3cbd97f77625beeed0a /Documentation | |
| parent | 0ce8cf2f31d661a27b7656e791acacb86eb58739 (diff) | |
| download | linux-stable-fb7737e949e31d8a71acee6bbb670f32dbd2a2c0.tar.gz linux-stable-fb7737e949e31d8a71acee6bbb670f32dbd2a2c0.tar.bz2 linux-stable-fb7737e949e31d8a71acee6bbb670f32dbd2a2c0.zip | |
hwspinlock/core: add device tree support
This patch adds a new OF-friendly API of_hwspin_lock_get_id()
for hwspinlock clients to use/request locks from a hwspinlock
device instantiated through a device-tree blob. This new API
can be used by hwspinlock clients to get the id for a specific
lock using the phandle + args specifier, so that it can be
requested using the available hwspin_lock_request_specific()
API.
Signed-off-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
[small comment clarification]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/hwspinlock.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/hwspinlock.txt b/Documentation/hwspinlock.txt index 62f7d4ea6e26..61c1ee98e59f 100644 --- a/Documentation/hwspinlock.txt +++ b/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 |