Re: [PATCH RFC 1/2] ACPI/PPTT: Add acpi_pptt_get_package_info() API

[John Garry]

On 28/01/2020 14:54, Sudeep Holla wrote:
> > > > https://lore.kernel.org/linux-arm-kernel/1579876505-113251-6-git-send-email-john.garry@xxxxxxxxxx/
> > > Ah, there's already quite a lot of dependency built for this feature:(
> > Not really. It's only an RFC ATM, and my requirement is a sysfs file to read
> > the SoC id(s) (under ACPI FW). So I would still expect to be able to support
> > this from the SMCCC extension method.

Hi Sudeep,

> As mentioned above, yes the driver would remain almost same for SMCCC
> SOC_ID support too. The main point was: do we need to add support to
> PPTT Type 2 entry when we know there is proposal to deprecate it. I
> would at-least wait to see progress on that until I would add this to
> the kernel.

Not having support in the kernel for a feature which may be officially 
deprecated, i.e public knowledge, in future (maybe 1 year) seems harsh. 
Especially when there is no final released alternative.

So do you know if other OSes use it?

Thanks
John