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Date:   Fri, 18 Dec 2020 13:02:20 +0800
From:   Lecopzer Chen <>
To:     <>
CC:     <>,
        <>, <>,
        <>, <>,
Subject: Re: [PATCH] arm64: Kconfig: Add SYS_SUPPORTS_APM_EMULATION

Hi Catalin,
Thanks for your explanation.
> > so there is two points
> > 1. out-of-tree function can't be approved
> >     I totally agree with this :) so we may have a driver upstream in the future.
> It may not be upstreamable if it relies on the old APM interface ;).
> > 2. APM not make sense on arm64
> > Could you please let me konw the reason why APM on ARM64 doesn't make sense?
> It's a very old interface, even on x86 it is disabled in the distro
> kernels. There are more modern alternatives and you should update your
> driver and user space to use them (e.g. /sys/power/).

Got it! I will disscuss with our internal team to update their drivers.

thanks a lot!


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