struct rpmsg_driver *rpdrv = to_rpmsg_driver(drv); const struct rpmsg_device_id *ids = rpdrv->id_table; unsigned int i; /* 针对特殊情况,dev中的driver_override被设置,则只匹配和driver_override名字相同的驱动程序 */ if (rpdev->driver_override) return !strcmp(rpdev->driver_override, drv-...
("source") rpmsg address, and remote ("destination") rpmsg address. The listening entity (or client) which communicates with a remote processor is referred as rpmsg driver. The rpmsg device and rpmsg driver are matched based on rpmsg device name and rpmsg driver ID table. This sysfs entry ...
and have a local ("source") rpmsg address, and remote ("destination") rpmsg address. When a driver starts listening on a channel, its rx callback is bound with a unique rpmsg local address (a 32-bit integer). This way when inbound messages arrive, the rpmsg core dispatches them to th...
The following image shows the current Linux implementation of the RPMsg framework and the RPMsg char driver functionalities. Note: in this example only one endpoint is exposed. The driver was first introduced in the Linux 4.11 version, and sources can be found in the$(KERNEL_SRC)/drivers/rpmsg...
Loading the RPMsg Linux Driver After the device tree has been modified and the module has been rebooted, the driver should appear as "registered" in the dmesg log: # dmesg | grep -i rpmsg [ 0.045742] imx rpmsg driver is registered. ...
RPMsg是基于VirtIO的消息总线,它允许内核驱动程序与系统上可用的远程处理器进行通信,同时,驱动程序可以根据需要公开适当的用户空间接口(参考linux-origin_master/Documentation/rpmsg.txt)。 STM32MP1多核通信框架如下图。 消息服务基于共享内存,使用RPMsg和Virtio框架,RemoteProc框架则控制远程处理器生命周期。
RPMsg/IPC kernel repositories for OMAPx & AMx SoCs - TI Linux rpmsg bus and client driver feature and integration tree for OMAP4/OMAP5 & DRA7xx/AM57xx; Keystone K2 & Davinci OMAP-L138 SoCs.Scott (ITS) Allen ModeNameSize -rw-r--r--.clang-format13061logstatsplainblame ...
The i2c3 is used by M4 core, we delete the node to change the driver. The driver used in imx8mp-evk.dts is " "fsl,imx8mp-i2c", "fsl,imx21-i2c"; " and for imx8mp-evk-rpmsg.dts is " "fsl,i2c-rpbus" ". The i2c-rpbus node should define its bus id ...
Linux applications an easy means to open and identify rpmsg character devices created by the Linux kernel rpmsg-char driver using the virtio-rpmsg-bus transport back-end. The library currently supports the TI K3 AM65x, AM64x, AM62x, AM62Ax, AM62Px, J721E, J7200, J721S2, J784S4 and...
以STM32MP157为例,Cortex-A内核先启动,然后使用Linux RemoteProc框架进行加载Cortex-M4固件,启动M4内核。 ST官方提供的内核已经默认配置了Remoteproc驱动,进入系统后,首先将要运行的M4固件放在/lib/firmware/目录下,然后将固件名字写到/sys/class/remoteproc/remoteproc0/firmware,再操作...