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authorBjorn Andersson <bjorn.andersson@linaro.org>2017-01-11 06:35:12 -0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2017-01-18 10:43:15 -0800
commitc0cdc19f84a4712cf74888f83af286e3c2e14efd (patch)
tree59f3d77a9489cae13f86af2d1c3576720c89d0f8 /drivers/rpmsg/Makefile
parentadaa11b02c34ebbcaa7dff43f9cfadd4a9a226fd (diff)
downloadlinux-c0cdc19f84a4712cf74888f83af286e3c2e14efd.tar.gz
rpmsg: Driver for user space endpoint interface
This driver allows rpmsg instances to expose access to rpmsg endpoints to user space processes. It provides a control interface, allowing userspace to export endpoints and an endpoint interface for each exposed endpoint. The implementation is based on prior art by Texas Instrument, Google, PetaLogix and was derived from a FreeRTOS performance statistics driver written by Michal Simek. The control interface provides a "create endpoint" ioctl, which is fed a name, source and destination address. The three values are used to create the endpoint, in a backend-specific way, and a rpmsg endpoint device is created - with the three parameters are available in sysfs for udev usage. E.g. to create an endpoint device for one of the Qualcomm SMD channel related to DIAG one would issue: struct rpmsg_endpoint_info info = { "DIAG_CNTL", 0, 0 }; int fd = open("/dev/rpmsg_ctrl0", O_RDWR); ioctl(fd, RPMSG_CREATE_EPT_IOCTL, &info); Each created endpoint device shows up as an individual character device in /dev, allowing permission to be controlled on a per-endpoint basis. The rpmsg endpoint will be created and destroyed following the opening and closing of the endpoint device, allowing rpmsg backends to open and close the physical channel, if supported by the wire protocol. Cc: Marek Novak <marek.novak@nxp.com> Cc: Matteo Sartori <matteo.sartori@t3lab.it> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg/Makefile')
-rw-r--r--drivers/rpmsg/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile
index ae9c9132cf76..fae9a6d548fb 100644
--- a/drivers/rpmsg/Makefile
+++ b/drivers/rpmsg/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_RPMSG) += rpmsg_core.o
+obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o
obj-$(CONFIG_RPMSG_QCOM_SMD) += qcom_smd.o
obj-$(CONFIG_RPMSG_VIRTIO) += virtio_rpmsg_bus.o