Re: [PATCH v24 00/12] Implement PSCI reboot mode driver for PSCI resets

[Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>]

On 9/4/2026 12:47 PM, Ulf Hansson wrote:
> On Thu, Sep 3, 2026 at 6:04 PM Lee Jones <lee@kernel.org> wrote:
>>
>> On Mon, 03 Aug 2026, Shivendra Pratap wrote:
>>
>>> Userspace should be able to initiate device reboots using the various
>>> PSCI SYSTEM_RESET and SYSTEM_RESET2 types defined by PSCI spec. This
>>> patch series introduces psci-reboot-mode driver that will induce
>>> command-based resets to psci driver for executing the device reset.
>>
>> The more I read through this submission, the more convinced I get that
>> it does not belong in MFD.  This is a potentially nice "architectural
>> workaround" if it a) didn't break some of MFD's fundamental "real
>> devices only" rules, of which cpuidle and reboot-mode certainly are not
>> and b) didn't require a massive expansion of what the MFD core is
>> designed to do.  I am more that a little uncomfortable with the 150
>> lines being added to MFD core support this workaround.
>>
>> My best suggestion so far would be to base these changes inside
>> drivers/firmware/psci and use the aux bus to communicate with the
>> various components.
> 
> We had some off list discussions about this as well and it seems like
> we are in agreement. What you are suggesting makes perfect sense to
> me.

Thanks for reviews. I will move this to Aux and re-post.

thanks,
Shivendra