[RFC PATCH 2/3] firmware: smccc: LFA: refactor, add device node support

Vedashree Vidwans vvidwans at nvidia.com
Mon Oct 13 13:09:58 PDT 2025



On 10/9/25 01:13, Sudeep Holla wrote:
> External email: Use caution opening links or attachments
> 
> 
> On Wed, Oct 08, 2025 at 07:09:06PM +0000, Vedashree Vidwans wrote:
>> - Add support for LFA device node in the kernel driver. Implement
>> probe() to register LFA interrupt and threaded interrupt service
>> function.
>> - CPUs will be rendezvoused during activation.
>> - On IRQ, driver will query FW components then triggers activation of
>> capable and pending components.
>> - Mutex synchronization is implemented to avoid concurrent LFA updates
>> through interrupt and sysfs interfaces.
>> - Refactor LFA CANCEL logic into independent lfa_cancel() function.
>> - Enhance PRIME/ACTIVATION functions to touch watchdog and implement
>> timeouts.
>>
>> Signed-off-by: Vedashree Vidwans <vvidwans at nvidia.com>
>> ---
>>   drivers/firmware/smccc/lfa_fw.c | 299 ++++++++++++++++++++++++++++----
> 
> I was expecting to the devicetree binding based on $subject but no.
> So this patch can't be reviewed without one.
> 
> --
> Regards,
> Sudeep

Thank you for your comments, I will include the devicetree binding
in the next iteration.

Regards,
Veda



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