linux-kernel - Re: [RFC] [PATCH] Adding Intel Moorestown PMIC Battery Driver

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Message-ID: <20100115131229.GA30213@oksana.dev.rtsoft.ru>
Date:	Fri, 15 Jan 2010 16:12:29 +0300
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	"Mahalingam, Nithish" <nithish.mahalingam@...el.com>
Cc:	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"cbou@...l.ru" <cbou@...l.ru>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH] Adding Intel Moorestown PMIC Battery Driver

On Fri, Jan 15, 2010 at 05:31:55PM +0530, Mahalingam, Nithish wrote:
[...]
> >> +       unsigned int batt_charge_now;           /* in mAS */
> >> +       unsigned int batt_prev_charge_full;     /* in mAS */
> >> +       unsigned int batt_charge_rate;          /* in units per second */
> > 
> > Per include/linux/power_supply.h and
> > Documentation/power/power_supply_class.txt
> > 
> > * All voltages, currents, charges, energies, time and temperatures in uV,
> > * uA, uAh, uWh, seconds and tenths of degree Celsius unless otherwise
> > * stated. It's driver's job to convert its raw values to units in which
> > * this class operates.
> 
> I just now checked the hardware spec and it is indeed mAh. I will correct 
> the comment appropriately.

Note, if the hardware reports the values in mAh (milli), the driver
still have to convert them to uAh (micro) before reporting the values
to userspace.

[...]
> > I think you can use threaded irq for this.
> > 
> > See documentation for request_threaded_irq() in kernel/irq/manage.c.
> > And as an example of usage see drivers/mfd/wm8350-irq.c.
> 
> Haa that is useful information... completely missed to read about this 
> feature.

No wonder, it's just a new feature, not many know about it. ;-)

Once again, thanks for the driver!

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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