RPMSG char driver Linux 4.14.98

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RPMSG char driver Linux 4.14.98

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greg_edwards
Contributor II

We currently have RPMsg working through the tty driver but we want to switch to the char driver.

We are building with Yocto Sumo release with Linux 4.14.98 linux-imx which has no support for RPMSG_VIRTIO_CHAR or RPMSG_CRTL configuration options.

Does NXP have an official upgrade/patch to get rpmsg character driver running with 4.14.98 kernel or do I need to port one of the other third party solutions?  Would porting lf-5.15.y rpmsg package be a good place to start?

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AldoG
NXP TechSupport
NXP TechSupport

Hello,

Have you tried using RPMSG_CHAR?
https://github.com/nxp-imx/linux-imx/blob/lf-5.15.y/drivers/rpmsg/Kconfig#L9

I'm not aware of such a patch, please note that the rpmsg_char/rpmsg_ctrl driver is not written or maintained by us, so maybe looking into the Linux community may be a better idea:
https://lwn.net/Articles/841058/
https://lwn.net/Articles/873758/

Best regards,
Aldo.

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