Create and register a rpmsg device for use with the rpmsg user space
interface, allowing user space to access SMD channels.
Also provide the "rpmsg_name" device attribute to expose the edge name
in sysfs, allowing the user to write udev rules for specific rpmsg
devices and their children.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Add support for polling the status of the write buffer so that user
space can use rpmsg character devices in non-blocking mode.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Add support for the "label" property, used to give the edge a name other
than the one of the DT node. This allows the implementor to provide
consistently named edges when using the rpmsg character device.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Argument validation in public functions, function stubs for COMPILE_TEST-ing
clients, preparation for exposing rpmsg endponts to user space and minor
Qualcomm SMD fixes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=yDjM
-----END PGP SIGNATURE-----
Merge tag 'rpmsg-v4.10' of git://github.com/andersson/remoteproc
Pull rpmsg updates from Bjorn Andersson:
"Argument validation in public functions, function stubs for
COMPILE_TEST-ing clients, preparation for exposing rpmsg endponts
to user space and minor Qualcomm SMD fixes"
* tag 'rpmsg-v4.10' of git://github.com/andersson/remoteproc:
dt-binding: soc: qcom: smd: Add label property
rpmsg: qcom_smd: Correct return value for O_NONBLOCK
rpmsg: Provide function stubs for API
rpmsg: Handle invalid parameters in public API
rpmsg: Support drivers without primary endpoint
rpmsg: Introduce a driver override mechanism
rpmsg: smd: Reduce restrictions when finding channel
qcom_smd_send() should return -EAGAIN for non-blocking channels with
insufficient space, so that we can propagate this event to user space.
Fixes: 53e2822e56 ("rpmsg: Introduce Qualcomm SMD backend")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
The edge registration functions is to be used from a remoteproc driver
to register and unregister an edge as the remote processor comes and
goes.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
SMD channels are created by the remotes in "opening" state, but
sometimes as we close and try to reopen them they linger in closing
state.
Following the search for a matching channel the create_ept() will verify
that the channel is in a suitable state, so we can lax the restrictions
of the search function to work around above difference in behaviour.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This introduces a new rpmsg backend for the Qualcomm SMD system,
allowing communication with various remote processors found in Qualcomm
platforms. The implementation is based on, and intends to replace,
drivers/soc/qcom/smd.c with the necessary adaptions for fitting with the
rpmsg core.
Based on original work by Sricharan R <sricharan@codeaurora.org>
Cc: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Bjorn Andersson