Add FLEXCAN HW Filter in CAN driver

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Add FLEXCAN HW Filter in CAN driver

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yogeshbsa89
Contributor II

Hi,

I want to implement CAN HW filter in CAN driver.

As current can driver implementation is Network driver so can be accessed via socket.

So in this implementation CAN filter can be set at kernel level by using socket options.

I would like to use can Hw filter to reduce the load on CAN receive interrupt.

Since CAN is running at 1mbps. If load on CAN bus increases which increases the CAN interrupt rate in turn raise CPU load.

Please suggest which registers i need to change. if any patch is available for reference kindly share.   

 

Regards,

Yogesh 

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Jean-Philippe
Contributor I

Hi Igor,

I have the same request for iMX6ULL. I really need to enable hardware filtering to avoid to many irq and kernel filtering.

Could you send me the patch ?

Thank you !

Jean-Philippe

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sudarkb
Contributor II

Hi @Jean-Philippe ,

Will it be possible to share the FLEXCAN HW Filter patch.

Regards,
Sudar

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igorpadykov
NXP Employee
NXP Employee

Hi Yogesh

 

patch was sent you via mail.

 

Best regards
igor

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jmeyerfluid
Contributor I

Hello, I am running into a similar problem with too many CAN IRQ's on the IMX6, could you please send me the patch to enable FlexCAN hardware filtering, it should solve my problem as I only need to filter in a couple of messages on a very busy bus. Thanks!

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sudarkb
Contributor II

Hi @igorpadykov ,

We would like to add the FLEXCAN HW Filter in CAN driver. Kindly share the patch for the same.

Regards,
Sudar

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1,169 Views
thomas_mohnl
Contributor I

Hi Igor,

I have the same topic: need HW filter in flexcan driver.

Please provide me also with the patch.

Thanks,

Thomas

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