linux-kernel - Re: [PATCH v2 3/3] RX-51: Add platform data for bq24150a charger

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Date:	Sun, 24 Nov 2013 11:28:26 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Anton Vorontsov <anton@...msg.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	freemangordon@....bg, aaro.koskinen@....fi
Subject: Re: [PATCH v2 3/3] RX-51: Add platform data for bq24150a charger

On Tuesday 19 November 2013 14:32:13 Pavel Machek wrote:
> On Tue 2013-11-19 11:18:05, Pali Rohár wrote:
> > This patch will register bq24150a charger in RX-51 board
> > data.
> > 
> > So finally charging battery on Nokia N900 (RX-51) working
> > automatically without any proprietary Nokia bits in
> > userspace.
> > 
> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> 
> Reviewed-by: Pavel Machek <pavel@....cz>
> 
> 									Pavel
> BTW, current code says:
> 
> That seems to limit charging voltage to 3.9V, with comment
> saying 4.11V... which means battery will not be charged
> fully. does it make sense to raise limit to 4.11V here?
> 
> Aha, and actually will not 4.2V requested by
> rx51_bq24150a_platform_data trigger -EINVAL?
> 
> /* set battery regulation voltage in mV */
> static int bq2415x_set_battery_regulation_voltage(struct
> bq2415x_device *bq,
>                                                   int mV)
> {
>         int val = (mV/10 - 350) / 2;
> 
>         if (val < 0)
>                 val = 0;
>         else if (val > 94) /* FIXME: Max is 94 or 122 ? Set
> max value ? */
>                 return -EINVAL;
> 
>         return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE,
> val, BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); }
> 

Above bq2415x_set_battery_regulation_voltage function is updated 
in 3.13, see commit 3ed5cd79b82e9a055e0df3275eeb471ea0f1e2d7.

-- 
Pali Rohár
pali.rohar@...il.com

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