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authorOhad Ben-Cohen <ohad@wizery.com>2012-07-02 20:20:53 +0300
committerOhad Ben-Cohen <ohad@wizery.com>2012-07-06 00:53:27 +0300
commit40e575b1d0b34b38519d361c10bdf8e0c688957b (patch)
tree88e82959201de6a1bbe3570d2a0d924ca33882dc /Documentation/remoteproc.txt
parent0e49b72c8c91f9ea65ae62ca3061f885aa06a6f6 (diff)
downloadlinux-linaro-stable-40e575b1d0b34b38519d361c10bdf8e0c688957b.tar.gz
remoteproc: remove the get_by_name/put API
Remove rproc_get_by_name() and rproc_put(), and the associated remoteproc infrastructure that supports it (i.e. klist and friends), because: 1. No one uses them 2. Using them is highly discouraged, and any potential user will be deeply scrutinized and encouraged to move. If a user, that absolutely can't live with the direct boot/shutdown model, does show up one day, then bringing this functionality back is going to be trivial. At this point though, keeping this functionality around is way too much of a maintenance burden. Cc: Sjur Brændeland <sjur.brandeland@stericsson.com> Cc: Loic Pallardy <loic.pallardy@stericsson.com> Cc: Ludovic BARRE <ludovic.barre@stericsson.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Fernando Guzman Lugo <fernando.lugo@ti.com> Cc: Suman Anna <s-anna@ti.com> Cc: Mark Grosen <mgrosen@ti.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'Documentation/remoteproc.txt')
-rw-r--r--Documentation/remoteproc.txt27
1 files changed, 1 insertions, 26 deletions
diff --git a/Documentation/remoteproc.txt b/Documentation/remoteproc.txt
index ad6ded4bca5c..f33c3bbbc867 100644
--- a/Documentation/remoteproc.txt
+++ b/Documentation/remoteproc.txt
@@ -36,8 +36,7 @@ cost.
Note: to use this function you should already have a valid rproc
handle. There are several ways to achieve that cleanly (devres, pdata,
the way remoteproc_rpmsg.c does this, or, if this becomes prevalent, we
- might also consider using dev_archdata for this). See also
- rproc_get_by_name() below.
+ might also consider using dev_archdata for this).
void rproc_shutdown(struct rproc *rproc)
- Power off a remote processor (previously booted with rproc_boot()).
@@ -51,30 +50,6 @@ cost.
which means that the @rproc handle stays valid even after
rproc_shutdown() returns, and users can still use it with a subsequent
rproc_boot(), if needed.
- - don't call rproc_shutdown() to unroll rproc_get_by_name(), exactly
- because rproc_shutdown() _does not_ decrement the refcount of @rproc.
- To decrement the refcount of @rproc, use rproc_put() (but _only_ if
- you acquired @rproc using rproc_get_by_name()).
-
- struct rproc *rproc_get_by_name(const char *name)
- - Find an rproc handle using the remote processor's name, and then
- boot it. If it's already powered on, then just immediately return
- (successfully). Returns the rproc handle on success, and NULL on failure.
- This function increments the remote processor's refcount, so always
- use rproc_put() to decrement it back once rproc isn't needed anymore.
- Note: currently rproc_get_by_name() and rproc_put() are not used anymore
- by the rpmsg bus and its drivers. We need to scrutinize the use cases
- that still need them, and see if we can migrate them to use the non
- name-based boot/shutdown interface.
-
- void rproc_put(struct rproc *rproc)
- - Decrement @rproc's power refcount and shut it down if it reaches zero
- (essentially by just calling rproc_shutdown), and then decrement @rproc's
- validity refcount too.
- After this function returns, @rproc may _not_ be used anymore, and its
- handle should be considered invalid.
- This function should be called _iff_ the @rproc handle was grabbed by
- calling rproc_get_by_name().
3. Typical usage