Communication between linux kernel and PRU

Satoshi TOMINAGA

Hi all,

I want to implement the function to communicate with PRU in kernel driver.
I know that there are APIs for user space applications:
processors.wiki.ti.com/.../PRU_Linux_Application_Loader_API_Guide
but I can not find any examples for kernel space.

So, I want to know...
1. Is it possible to communicate with PRU from kernel driver ?
2. If possible.
2.1. Are there any APIs for the purpose ?
2.2. Are there any examples which communicate between linux kernel and PRU ?

Regards,
TOMINAGA Satoshi

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Here is the PRU wiki portal, where you will find all the latest information: processors.wiki.ti.com/.../PRU-ICSS

0 Satoshi TOMINAGA over 9 years ago in reply to Biser Gatchev-XID

Intellectual 850 points

Hi Biser,

I've just found that the PRU Hands on Lab step 5 describes the PRU - kernel driver communication using rpmsg.

processors.wiki.ti.com/.../PRU_Training:_Hands-on_Labs

I used the PRU firmware in example-applications/pru-icss-4.0.1/labs/lab_5/solution
as /lib/am335x-pru?-fw and used kernel module in board-support/linux-4.1.13/samples/rpmsg.

When

# modprobe rpmsg_client_sample

is executed, kernel log in sample driver shows that the driver communicates with PRU via RPMsg.
Thank you for your support.

Regards,
TOMINAGA Satoshi

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Communication between linux kernel and PRU