linux-kernel - Re: [PATCH RFC] ACPI: container: Add power domain control methods

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Message-ID: <21498cd9-e84f-2592-8f7b-16c86c4f05fd@huawei.com>
Date:   Thu, 10 Nov 2022 22:28:23 +0800
From:   "zhangzekun (A)" <zhangzekun11@...wei.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
CC:     <lenb@...nel.org>, <patchwork@...wei.com>,
        <wangkefeng.wang@...wei.com>, <linux-acpi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <guohanjun@...wei.com>,
        <wanghuiqiang@...wei.com>, <lihuisong@...wei.com>,
        <wangxiongfeng2@...wei.com>
Subject: Re: [PATCH RFC] ACPI: container: Add power domain control methods

Hi, Rafael J

Thanks a lot for your advice! I will look into LPI and find a better way
to do what I want.

Best Regards,
Zekun, Zhang

在 2022/11/10 21:05, Rafael J. Wysocki 写道:
> On Thu, Nov 10, 2022 at 1:13 PM zhangzekun (A) <zhangzekun11@...wei.com> wrote:
>> Kindly ping.
> I'm not going to apply this patch if that's what you're asking about.
>
> Please have a look at LPI which is the ACPI way of doing what you want.
>
> If you need to extend the support for it in the kernel, please do so.
>
> If you need to extend the definition of LPI in the ACPI specification,
> there is also a way to do that.
>
> What you are trying to do would require extending the container device
> definition in the specification anyway.
>
>> 在 2022/10/29 1:07, Rafael J. Wysocki 写道:
>>> On Tue, Oct 25, 2022 at 8:17 AM Zhang Zekun <zhangzekun11@...wei.com> wrote:
>>>> Platform devices which supports power control are often required to be
>>>> power off/on together with the devices in the same power domain. However,
>>>> there isn't a generic driver that support the power control logic of
>>>> these devices.
>>> Not true.
>>>
>>> There is the ACPI power resources interface designed to represent
>>> power domains that is well supported and used in the industry.
>>>
>>> If it doesn't work for you, explain why.
>>>