Re: [PATCH] cpuidle: psci: Avoid initializing faux device if no DT idle states are present

[Sudeep Holla <sudeep.holla@arm.com>]

Hi Rafael,

On Fri, May 02, 2025 at 03:01:19PM +0100, Sudeep Holla wrote:
> Commit af5376a77e87 ("cpuidle: psci: Transition to the faux device interface")
> transitioned the PSCI cpuidle driver from using a platform device to the
> faux device framework. However, unlike platform devices, the faux device
> infrastructure logs an error when the probe function fails, even if the
> failure is intentional or expected.
> 
> To prevent unnecessary error logs, we can skip creating the faux device
> entirely if there are no PSCI idle states defined in the device tree.
> Introduce a check for DT idle states during initialization and avoid
> setting up the device if none are found.
> 
> This ensures cleaner logs and avoids misleading probe failure messages
> when PSCI idle support is intentionally not described in DT.
>

As you pointed out in another similar fix that exist only in the linux-next,
I have also missed to point out that fact here. This is only present in
the next. Let me know if you want me to drop the commit hash reference
and repost it with -next prefix which I generally do and somehow clearly
missed here. Sorry for that.

-- 
Regards,
Sudeep