Commit Graph

107 Commits

Author SHA1 Message Date
Bjorn Andersson
7c89717f82 remoteproc: Introduce rproc handle accessor for children
In certain circumstances rpmsg devices needs to acquire a handle to the
ancestor remoteproc instance, e.g. to invoke rproc_report_crash() when a
fatal error is detected. Introduce an interface that walks the device
tree in search for a remoteproc instance and return this.

Tested-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-09-01 15:49:13 -07:00
Bjorn Andersson
f9cbbd256c remoteproc: Stop subdevices in reverse order
Subdevices might depend on earlier registered subdevices for
communication purposes, as such they should be stopped in reverse order
so that said communication channel is removed after the dependent
subdevice is stopped.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-30 16:29:55 -07:00
Bhumika Goyal
c42ca04da5 remoteproc: make device_type const
Make this const as it is only stored in the type field of a device
structure, which is const.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-24 10:25:50 -07:00
Suman Anna
1b0ef9068f remoteproc: Merge __rproc_boot() with rproc_boot()
The additional arguments in the internal __rproc_boot() function
were dropped in commit 2bfc311a57 ("remoteproc: Drop wait in
__rproc_boot()"). The exported rproc_boot() is now just a wrapper
around this internal function, so merge them together.

While at this, also remove the declaration for the previously
cleaned up rproc_boot_nowait() function.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-07-26 10:01:27 -07:00
Colin Ian King
ca91ab5f11 remoteproc: fix spelling mistake: "Resouce" -> "Resource"
Trivial fix to spelling mistake in dev_err message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-05-30 20:57:40 -07:00
Sarangdhar Joshi
7e83cab824 remoteproc: Modify recovery path to use rproc_{start,stop}()
Replace rproc_shutdown() by rproc_stop() and rproc_boot() by
rproc_start() in the recovery path, in order to avoid remoteproc
resources re-allocation overhead and to assist with extracting the
coredumps after stopping the remote processor.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-05-26 18:11:33 -07:00
Sarangdhar Joshi
1efa30d089 remoteproc: Introduce rproc_{start,stop}() functions
In the context of recovering from crash, rproc_trigger_recovery() does
rproc_shutdown() followed by rproc_boot(). The remoteproc resources are
cleaned up in rproc_shutdown() and immediately reallocated in
rproc_boot() which is an unnecessary overhead. Furthermore, we want the
memory regions to be accessible after stopping the remote processor, to
be able to extract the memory content for a coredump.

This patch factors out the code in rproc_boot() and rproc_shutdown()
path and introduces rproc_{start,stop}() in order to avoid resource
allocation overhead.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-05-26 18:11:31 -07:00
Sarangdhar Joshi
5e6533f72c remoteproc: Modify the function names
The functions rproc_add_virtio_devices() and rproc_fw_config_virtio()
are reduced to trigger auto-boot only. Modify these function names and
related comments to reflect their current state.

This patch does not add any functional change.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-02-06 13:06:13 -08:00
Sarangdhar Joshi
7a20c64ddb remoteproc: Reduce asynchronous request_firmware to auto-boot only
The rproc_add_virtio_devices() requests firmware asynchronously and
triggers boot if the auto_boot flag is set. However, this
asynchronous call seems to be redundant for non auto-boot scenario
since the rproc_boot() would call request_firmware() anyways. Move
the auto_boot check to rproc_add() so that a redundant call to
_request_firmware can be avoided for non auto-boot case.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-02-06 13:05:22 -08:00
Sarangdhar Joshi
2099c77d4a remoteproc: Drop firmware_loading_complete
firmware_loading_complete is used to synchronize operations
on rproc while asynchronous firmware loading is in progress.
However, rproc_boot() no longer waits on
firmware_loading_complete. Hence drop this completion
variable altogether and handle the race between rproc_del()
and rproc_boot() using new state RPROC_DELETED.

The request_firmware_nowait() will hold the reference to
rproc device by using a get_device()/put_device(), so the
rproc struct will remain valid even when we return from
rproc_del() before the asynchronous call to
rproc_fw_config_virtio() completes.

CC: Loic Pallardy <loic.pallardy@st.com>
CC: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-30 14:18:54 -08:00
Sarangdhar Joshi
b003d45b37 remoteproc: Move rproc_delete_debug_dir() to rproc_del()
The "remoteproc{0,1...}" sysfs entries are added in
rproc_add() and deleted in rproc_type_release() instead of
in rproc_del(). That leaves these lingering entries sticking
around after we return from rproc_del(). Move the
rproc_delete_debug_dir() to rproc_del() to fix this.

Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-01-30 14:18:40 -08:00
Bjorn Andersson
a0c10687ec Revert "remoteproc: Merge table_ptr and cached_table pointers"
Following any fw_rsc_vdev entries in the resource table are two variable
length arrays, the first one reference vring resources and the second
one is the virtio config space.  The virtio config space is used by
virtio to communicate status and configuration changes and must as such
be shared with the remote.

The reverted commit incorrectly made any changes to the virtio config
space only affect the local copy, in an attempt to allowing memory
protection of the shared resource table.

This reverts commit cda8529346.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-30 03:26:31 -08:00
Loic Pallardy
c81c0e0710 remoteproc: fix vdev reference management
Commit 2b45cef586 ("remoteproc: Further extend the vdev life cycle")
extends kref support for vdev management.
It introduces a regression when following sequence is executed:
rproc_boot --> rproc_shutdown --> rproc_boot
Second rproc_boot call crashes on register_virtio_device as device
is already existing.
Issue is previous vdev is never released when rproc is stop because
associated refcount is too high.

kref_get introduces is not needed as kref_init already initializes
krefcount to 1 because it considers associated variable as used.
This introduces a misalignment between kref_get and kref_put calls.

Fixes: 2b45cef586 ("remoteproc: Further extend the vdev life cycle")
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-30 03:15:42 -08:00
Bjorn Andersson
2bfc311a57 remoteproc: Drop wait in __rproc_boot()
In the event that rproc_boot() is called before the firmware loaded
completion has been flagged it will wait with the mutex held,
obstructing the request_firmware_nowait() callback from completing the
wait.

As rproc_fw_config_virtio() has been reduced to only triggering
auto-boot there is no longer a reason for waiting in rproc_boot(), so
drop this.

Cc: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-09 16:16:55 -08:00
Bjorn Andersson
a4ff18e9ed remoteproc: Remove "experimental" warning
Warning users that remoteproc and it's binary format are under
development doesn't serve much of a purpose. Different drivers support
different image formats and the resource table has a version field that
would need to be bumped when incompatible changes are introduced.

So lets drop this warning to clean up the kernel log.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-09 16:13:19 -08:00
Bjorn Andersson
cda8529346 remoteproc: Merge table_ptr and cached_table pointers
As all vdev resources are allocated before we boot the remote processor
we no longer need to support modifying the resource table while the
remote is running.

This saves us from the table_ptr dance, but more importantly allow the
remote processor to enable security lock down of the loaded table memory
region.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:18 -08:00
Bjorn Andersson
2ca7d866ca remoteproc: Remove custom vdev handler list
The vdev handler is now just another resource allocator, so handle all
resource types in a single pass.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:18 -08:00
Bjorn Andersson
48f18f8989 remoteproc: Update max_notifyid as we allocate vrings
Vrings are now allocated as we parse the resource table, before we
boot the rproc or register any virtio devices, so it's safe to bump
max_notifyid as part of this process.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:17 -08:00
Bjorn Andersson
f5bcb35387 remoteproc: Decouple vdev resources and devices
Represent the virtio device part of the vdev resources as remoteproc
subdevices to finalize the decoupling of the virtio resource and device
handling.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:17 -08:00
Bjorn Andersson
2b45cef586 remoteproc: Further extend the vdev life cycle
Tie the vdev (and hence vring) life cycle to the resource parsing and
resource cleanup operations, allowing us to safely register and
unregister virtio devices on the go.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:16 -08:00
Bjorn Andersson
a863af5d41 remoteproc: virtio: Anchor vring life cycle in vdev
Instead of having the vrings being allocated and freed as they are
requested by the virtio device tie their life cycle to the vdev
resource. This allows us to decouple the vdev resource management from
the virtio device management.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:16 -08:00
Bjorn Andersson
aab8d80223 remoteproc: Assign kref to rproc_vdev
No functional change

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-14 21:52:15 -08:00
Bjorn Andersson
7bdc9650f0 remoteproc: Introduce subdevices
A subdevice is an abstract entity that can be used to tie actions to the
booting and shutting down of a remote processor. The subdevice object is
expected to be embedded in concrete implementations, allowing for a
variety of use cases to be implemented.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-11-09 21:17:08 -08:00
Matt Redfearn
2aefbef041 remoteproc: Add a sysfs interface for firmware and state
This patch adds a sysfs interface to rproc allowing the firmware name
and processor state to be changed dynamically.

State was previously available in debugfs, and is replicated here. The
firmware file allows retrieval of the running firmware name, and a new
one to be specified at run time, so long as the remote processor has
been stopped.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-31 17:24:46 -07:00
Matt Redfearn
0f57dc6ae1 remoteproc: Keep local copy of firmware name
Storage of the firmware name was inconsistent, either storing a pointer
to a name stored with unknown ownership, or a variable length tacked
onto the end of the struct proc allocated in rproc_alloc.

In preparation for allowing the firmware of an already allocated struct
rproc to be changed, instead always keep a locally maintained copy of
the firmware name.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-18 15:03:35 -07:00
Bjorn Andersson
fbb6aacb07 remoteproc: Refactor rproc module locking
Lock the implementation as we hand out references to client drivers
rather than when they try to boot the remote processor. This allows
auto-booting remote processors to be shut down by unloading their
module, in addition to first unbinding them.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-02 22:50:22 -07:00
Bjorn Andersson
433c0e04bc remoteproc: Split driver and consumer dereferencing
In order to be able to lock a rproc driver implementations only when
used by a client, we must differ between the dereference operation of a
client and the implementation itself.

This patch brings no functional change.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-02 22:50:21 -07:00
Bjorn Andersson
229b85a6a5 remoteproc: Correct resource handling upon boot failure
The freeing of resources will attempt to clear values previously set in
the cached resource table, so make sure to free the table after we have
cleaned up the resources.

Fixes: 988d204cda ("remoteproc: Move handling of cached table to boot/shutdown")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-10-02 22:50:21 -07:00
Bjorn Andersson
eeac0a8788 remoteproc: Drop unnecessary NULL check
rproc_alloc() will make sure that the "firmware" pointer is either a
driver supplied value or pointing to a generated firmware filename, it
can't be NULL. So drop the extra check in the rproc_boot() path.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-19 16:28:22 -07:00
Loic PALLARDY
21b6657ef4 remoteproc: core: transform struct fw_rsc_vdev_vring reserved field in pa
In current implementation, struct fw_rsc_vdev_vring which describes
vring resource in firmware resource table owns only device address,
because it assumes that host is responsible of vring allocation and
only device address is needed by coprocessor.
But if vrings need to be fixed in system memory map for any reasons
(security, SoC charactieristics...), physical address is needed exatly
identified the memory chunck by host.

For that let's transform reserved field of struct fw_rsc_vdev_vring
to pa (physical address).

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-09-06 11:06:40 -07:00
Bjorn Andersson
13c4245b53 remoteproc: Only update table_ptr if we have a loaded table
In the case that we have a resource table, but not a loaded one we
should leave the table_ptr intact, as subsequent resource handling could
otherwise dereference the NULL pointer.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-18 12:33:20 -07:00
Bjorn Andersson
988d204cda remoteproc: Move handling of cached table to boot/shutdown
As we moved the vdev handling to the main boot/shutdown code path we can
further simplify the resource table handling by moving the parsing spet
to boot as well. The lifespan of the resource table is changed to live
from rproc_boot() to rproc_shutdown().

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-17 23:20:51 -07:00
Bjorn Andersson
d81fb32f3d remoteproc: Move vdev handling to boot/shutdown
The newly introduced "always-on" flag allows us to stop giving the vdevs
special treatment. The ordering of resource allocation and life cycle of
the remote processor is kept intact.

This allows us to mark a remote processor with vdevs to not boot unless
explicitly requested to do so by a client driver.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-17 23:18:51 -07:00
Bjorn Andersson
b35d7afc3b remoteproc: Calculate max_notifyid during load
The calculation of max_notifyid must only be done before we call start()
on the remoteproc drivers, so move the calculation to be part of the
loading steps.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-17 23:18:51 -07:00
Bjorn Andersson
ddf711872c remoteproc: Introduce auto-boot flag
Introduce an "auto-boot" flag on rprocs to make it possible to flag
remote processors without vdevs to automatically boot once the firmware
is found.

Preserve previous behavior of the wkup_m3 processor being explicitly
booted by a consumer.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Loic Pallardy <loic.pallardy@st.com>
Cc: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-17 23:17:42 -07:00
Anna, Suman
9d7814a9a4 remoteproc: print hex numbers with a leading 0x format
There are couple of debug statements that are printing hexadecimal
numbers without the leading 0x. Fix these and use the standard 0x%x
format specifier so that there is no confusion when looking at the
traces.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12 21:27:49 -07:00
Anna, Suman
730f84ce6d remoteproc: align code with open parenthesis
This patch fixes the existing alignment checkpatch check
warnings of the type "Alignment should match open parenthesis"
in the remoteproc core source files.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12 21:27:49 -07:00
Anna, Suman
899585ad39 remoteproc: use variable names for sizeof() operator
Fix the code formatting to use the kernel preferred style
of using the actual variables to determize the size using
the sizeof() operator.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12 21:27:47 -07:00
Anna, Suman
56324d7a22 remoteproc: fix couple of minor typos
Fix couple of minor mis-spelled words in all the remoteproc
source files.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12 21:27:47 -07:00
Anna, Suman
b605ed8b2d remoteproc: use proper format-specifier for printing dma_addr_t
The dma_addr_t types can be printed properly using the %pad
printk format-specifier, there is no need to resort to the
unsigned long long type-casting to deal with different possible
type sizes.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-12 21:27:46 -07:00
Lee Jones
c14b9a940e remoteproc: core: Remove pointless OOM print
These types of error prints are superfluous.  The system will
pick up on OOM issues and let the user know.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-10 10:46:14 -07:00
Lee Jones
353861660a remoteproc: core: Trivial: Improve error checking, spelling and debug prints
Trivial patch to clean up a couple of minor misgivings.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-10 10:46:10 -07:00
Lee Jones
9c219b2337 remoteproc: core: Ensure error message is clear
Before this patch, the dma_alloc_coherent() failure path printed out:

  "dma_alloc_coherent err: 16760832"

... alluding to the Linux error code being 16760832, but seeing as
Linux error codes are all negative, this looks like a signed/unsigned
issue.  In fact, the message is trying to print the length of the
requested memory region.  Let's clear that up.

While we're at it, let's standardise the way 'len' is printed.  In
all other locations 'len' is in hex prefixed by a '0x' for clarity.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-08-10 10:46:04 -07:00
Dave Gerlach
d2e12e66a9 remoteproc: Fix potential race condition in rproc_add
rproc_add adds the newly created remoteproc to a list for use by
rproc_get_by_phandle and then does some additional processing to finish
adding the remoteproc. This leaves a small window of time in which the
rproc is available in the list but not yet fully initialized, so if
another driver comes along and gets a handle to the rproc, it will be
invalid. Rearrange the code in rproc_add to make sure the rproc is added
to the list only after it has been successfuly initialized.

Fixes: fec47d8635 ("remoteproc: introduce rproc_get_by_phandle API")
Cc: stable@vger.kernel.org
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-06-14 11:08:16 -07:00
Bjorn Andersson
b3d39032d7 remoteproc: Add additional crash reasons
The Qualcomm WCNSS can crash by watchdog or a fatal software error. Add
these types to the list of remoteproc crash reasons.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-05-12 15:50:19 -07:00
Bjorn Andersson
e395f9ce49 remoteproc: core: Make the loaded resource table optional
Remote processors like the ones found in the Qualcomm SoCs does not have
a resource table passed to them, so make it optional by only populating
it if it does exist.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-05-12 15:50:04 -07:00
Lee Jones
3d87fa1d47 remoteproc: core: Task sync during rproc_fw_boot()
By default, rproc_fw_boot() needs to wait for rproc to be configured,
but a race may occur when using rpmsg/virtio.  In this case, it can
be called locally in a safe manor.

This patch represents two usecases:

 - External call (via exported rproc_boot()), which waits
 - Internal call can use 'nowait' version of rproc_boot()

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-05-06 11:46:36 -07:00
Stefan Agner
a66a5114b3 remoteproc: report error if resource table doesn't exist
Currently, if the resource table is completely missing in the
firmware, powering up the remoteproc fails silently. Add a message
indicating that the resource table is missing in the firmware.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2016-01-29 17:26:45 -08:00
Suman Anna
f42f79af16 remoteproc: fix memory leak of remoteproc ida cache layers
The remoteproc core uses a static ida named rproc_dev_index for
assigning an automatic index number to a registered remoteproc.
The ida core may allocate some internal idr cache layers and ida
bitmap upon any ida allocation, and all these layers are truely
freed only upon the ida destruction. The rproc_dev_index ida is
not destroyed at present, leading to a memory leak when using the
remoteproc core as a module and atleast one rproc device is
registered and unregistered.

Fix this by invoking ida_destroy() in the remoteproc core module
exit.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2015-11-26 17:44:28 +02:00
Ohad Ben-Cohen
8de3dbd089 remoteproc: fix !CONFIG_OF build breakage
Fix this:

drivers/remoteproc/remoteproc_core.c: In function 'rproc_get_by_phandle':
>> drivers/remoteproc/remoteproc_core.c:1167:2: error: implicit declaration of function 'of_find_node_by_phandle' [-Werror=implicit-function-declaration]
     np = of_find_node_by_phandle(phandle);

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Dave Gerlach <d-gerlach@ti.com>
Cc: Suman Anna <s-anna@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2015-06-18 11:44:41 +03:00