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

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Message-ID: <42c53659-7d60-4f5b-93a6-d3074f72aedf@nvidia.com>
Date: Mon, 13 Oct 2025 13:09:58 -0700
From: Vedashree Vidwans <vvidwans@...dia.com>
To: Sudeep Holla <sudeep.holla@....com>
Cc: salman.nabi@....com, lpieralisi@...nel.org, mark.rutland@....com,
 andre.przywara@....com, ardb@...nel.org, chao.gao@...el.com,
 linux-arm-kernel@...ts.infradead.org, linux-coco@...ts.linux.dev,
 linux-kernel@...r.kernel.org, sdonthineni@...dia.com, vsethi@...dia.com,
 vwadekar@...dia.com
Subject: Re: [RFC PATCH 2/3] firmware: smccc: LFA: refactor, add device node
 support



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@...dia.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