linux-kernel - Re: [PATCH] platform/x86: ideapad-laptop: Expose conservation mode switch

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Message-ID: <CAHp75Vf3+1HPqeNbN3UEyhraA0FvrCHhNGaKwfsrtQauEdOGTw@mail.gmail.com>
Date:   Tue, 30 May 2017 16:22:10 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Hao Wei Tee <angelsl@...elsl.xyz>
Cc:     Platform Driver <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andy@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Ike Panhc <ike.pan@...onical.com>
Subject: Re: [PATCH] platform/x86: ideapad-laptop: Expose conservation mode switch

On Sun, May 28, 2017 at 4:47 PM, Hao Wei Tee <angelsl@...elsl.xyz> wrote:
> On 5/27/17 3:31 PM, Hao Wei Tee wrote:
>> This exposes the battery conservation mode present on some (?) IdeaPads.
>> The mode is set by calling ACPI method SBMC with argument 3 (on) or
>> 5 (off). Status is reported in bit 5 of the return value of ACPI method
>> GBMD.
>>
>> This patch was written based on an IdeaPad U430p. I'm not sure if the ACPI
>> methods are the same across all IdeaPads, so it would be great if this got more
>> testing across other models before it's merged.
>
> I got someone to test on an IdeaPad Y510p. It works on that too.

Do we have any other option that expose something via sysfs?

-- 
With Best Regards,
Andy Shevchenko