linux-kernel - Re: [PATCH v3 3/6] Documentation: DT: Document twl4030-madc-battery bindings

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Message-Id: <86E29CFB-0345-400E-8085-CC2DA549B79A@goldelico.com>
Date:	Tue, 17 Mar 2015 09:59:34 +0100
From:	"Dr. H. Nikolaus Schaller" <hns@...delico.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Mark Rutland <mark.rutland@....com>,
	Tony Lindgren <tony@...mide.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Linux PM mailing list <linux-pm@...r.kernel.org>,
	GTA04 owners <gta04-owner@...delico.com>,
	Belisko Marek <marek.belisko@...il.com>
Subject: Re: [PATCH v3 3/6] Documentation: DT: Document twl4030-madc-battery bindings


Am 17.03.2015 um 09:48 schrieb Pavel Machek <pavel@....cz>:

>> 
>> Temperature calibration should have already been done in the underlaying twl4030 iio driver.
>> 
>> Discharge rate is the real current flow reported in uA. Also
>> reported by iio.
> 
> Ack, but there's rather severe temperature dependency of the lithium
> battery, which you should take into account if you want to compute
> “percentage charged".

We just want to estimate it as good as possible. 5-10% is sufficient
and better than no value at all (which is what you get without this
driver).

And, we just convert the (existing) driver from non-DT to DT and to use
iio, so we do not want to change the inner logic what it does and how it
works.

BR,
Nikolaus

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