linux-kernel - Re: How to populate Battery information through ACPI tables

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Message-ID: <20130219192016.GL2439@intel.com>
Date:	Tue, 19 Feb 2013 21:20:16 +0200
From:	"Westerberg, Mika" <mika.westerberg@...el.com>
To:	"Pallala, Ramakrishna" <ramakrishna.pallala@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Zhang, Rui" <rui.zhang@...el.com>
Subject: Re: How to populate Battery information through ACPI tables

On Tue, Feb 19, 2013 at 08:59:29PM +0200, Pallala, Ramakrishna wrote:
> > > Mika, I want to populate this characterization data as device
> > > specific/custom data which could be anything And may not be entirely
> > > related to battery. Is this is possible?
> > 
> > Yes, for example you could have a custom ACPI method with your device which
> > then returns this information.
> > 
> > See for example chapter 10.2.2.1 from the ACPI spec. It describes _BIF method
> > that returns some battery data to the caller.
> 
> Mika, _BIF method returns battery data/struct which is defined Table. 10-233.

Yes, it was just an example. You can have your own custom method for that,
lets say:

	BLAH()

that then returns whatever you need.

> If I want to pass some device specific data seems like I can use
> _DSM(9.14.1) method and pass custom /device specific data to the driver.

_DSM is also an option, yes.

> And I believe this data format can be anything and private to the device?
> Can you confirm?

Yes.
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