register char driver; Remove char driver; 该driver name 为 rpmsg_chrdev; static struct rpmsg_driver rpmsg_chrdev_driver = { .probe = rpmsg_chrdev_probe, .remove = rpmsg_chrdev_remove, .drv = { .name = "rpmsg_chrdev", }, }; Rpmsg Device:该层一开始是只有Virtio框架所构成的,后面添加了G...
In our case, rpmsg_chardev is built with kernel. Below are the rpmsg char driver config from defconfig : # # Rpmsg drivers # CONFIG_RPMSG=y CONFIG_RPMSG_CHAR=y CONFIG_RPMSG_QCOM_GLINK_NATIVE=y CONFIG_RPMSG_QCOM_GLINK_RPM=y CONFIG_RPMSG_VIRTIO=y ...
A crucial component for Inter-core communication in an Asymmetric Architecture is the RPMsg device. The RPMsg char driver exposes RPMsg endpoints to user-space processes. Multiple user-space applications can use one RPMsg channel uniquely by requesting different interactions with the remote service. The...
structrpmsg_device {structdevice dev;structrpmsg_device_id id;char*driver_override; u32 src; u32 dst;structrpmsg_endpoint *ept;boolannounce;conststructrpmsg_device_ops *ops; }; struct rpmsg_driver定义了 rpmsg 驱动程序的特定操作: structrpmsg_driver {structdevice_driver drv;conststructrpmsg_device...
还有一种字符设备模型,rpmsg_chrdev,源码位于 drivers/rpmsg/rpmsg_char.c ,我们的代码中未实验,可自行研究。 M4核的代码中,创建上述两个rpmsg设备的代码如下: rpmsg-client:rpmsg-client设备的示例,使用的是rpmsg框架下原生的异构通讯方式,调用openamp的原生操作函数,比如OPENAMP_send、receive等即可通讯。 在注册设备...
static struct rpmsg_driver rpmsg_chrdev_driver = { .probe = rpmsg_chrdev_probe, .remove = rpmsg_chrdev_remove, .drv = { .name = "rpmsg_chrdev", }, }; static int rpmsg_char_init(void) { int ret; ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"...
However, one can try using the "/drivers/rpmsg/rpmsg_char.c (CONFIG_RPMSG_CHAR)" driver. It does have some support for blocking IO with the (~O_NONBLOCK) option. One can refer to the below thread for more information about the rpmsg_char driver with i.MX processors Alternatives to imx...
Seems when RPMsg char Driver is working, there's /dev/rpmsg_ctrl0 is created. but it's not created when i enabled it at kernel configuration. Not only the debian, i already test with YOCTO. is there any part that i missing or need to another action for it?? Best R...
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(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg_char"); if (ret < 0) { pr_err("failed to allocate char dev region\n"); return ret; } ret = register_rpmsg_driver(&rpmsg_chrdev_driver); if (ret < 0) { pr_err("rpmsg: failed to register rpmsg raw driver\n"); goto free_region; ...