[PATCH v24 04/12] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell

[Shivendra Pratap]

On 8/13/2026 6:36 PM, Bartosz Golaszewski wrote:
> On Thu, 13 Aug 2026 14:38:41 +0200, Lee Jones <lee at kernel.org> said:
>> On Mon, 03 Aug 2026, Shivendra Pratap wrote:
>>
>>> PSCI has multiple kernel consumers, such as cpuidle-psci-domain.
>>> Currently, both the PSCI core driver and cpuidle-psci-domain bind
>>> directly to the same PSCI node "arm,psci-1.0". Additional consumers, if
>>> introduced, would also need to bind in the same way, leading to several
>>> drivers attached to a single device node.
>>>
>>> Introduce a PSCI MFD driver that binds to "arm,psci-1.0" and registers
>>> PSCI child cells. As the first user, register cpuidle-psci-domain as a
>>> child cell.
>>>
>>> Update cpuidle-psci-domain to probe as an MFD child and use the parent
>>> PSCI node for power-domain traversal.
>>>
>>> Suggested-by: Bartosz Golaszewski <bartosz.golaszewski at oss.qualcomm.com>
>>> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski at oss.qualcomm.com>
>>> Signed-off-by: Shivendra Pratap <shivendra.pratap at oss.qualcomm.com>
>>> ---
>>>   MAINTAINERS                           |  1 +
>>>   drivers/cpuidle/Kconfig.arm           |  1 +
>>>   drivers/cpuidle/cpuidle-psci-domain.c |  9 +-------
>>>   drivers/mfd/Kconfig                   | 12 ++++++++++
>>>   drivers/mfd/Makefile                  |  2 ++
>>>   drivers/mfd/psci-mfd.c                | 43 +++++++++++++++++++++++++++++++++++
>>
>> We don't usually allow the use of the term MFD in devices.
>>
>> What does this do?  Is it a mux?  psci-mux?
>>
>> If not, think about what it is and call it that instead.
>>
> 
> My two cents: I'd call it drivers/mfd/arm-psci.c

Ack.

thanks,
Shivendra