From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>,
linux-kernel@vger.kernel.org, Liam Girdwood <lrg@slimlogic.co.uk>
Subject: Re: [PATCH] regulator/max1586: fix V3 gain calculation integer overflow
Date: Thu, 28 May 2009 22:36:07 +0200 [thread overview]
Message-ID: <87ljoh2ceg.fsf@free.fr> (raw)
In-Reply-To: <1243537203-4663-1-git-send-email-philipp.zabel@gmail.com> (Philipp Zabel's message of "Thu\, 28 May 2009 21\:00\:03 +0200")
Philipp Zabel <philipp.zabel@gmail.com> writes:
> On Thu, May 28, 2009 at 10:59 AM, Mark Brown <broonie@opensource.wolfsonmicro.com> wrote:
>> On Thu, May 28, 2009 at 07:15:16AM +0200, Philipp Zabel wrote:
>>> The V3 regulator can be configured with an external resistor
>>> connected to the feedback pin (R24 in the data sheet) to
>>> increase the voltage range.
>>>
>>> For example, hx4700 has R24 = 3.32 kOhm to achieve a maximum
>>> V3 voltage of 1.55 V which is needed for 624 MHz CPU frequency.
>>>
>>> Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
>>
>> Looks good.
>>
>> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
>
> Thanks, but it turns out I hit a 32 bit integer overflow in
> the gain calculation. I'd like to mend that with the following
> patch. Now max_uV could be increased up to 4.294 V, enough to
> charge LiPo cells.
>
> Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
OK.
With that one melt into the previous one, have my :
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Would you submit that to Liam or Mark for queuing into the regulator patch queue ?
Cheers.
--
Robert
next prev parent reply other threads:[~2009-05-28 20:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-26 19:39 [PATCH] regulator/max1586: support increased V3 voltage range Philipp Zabel
2009-05-26 20:43 ` Mark Brown
2009-05-26 21:26 ` pHilipp Zabel
2009-05-26 21:31 ` Robert Jarzmik
2009-05-26 23:40 ` pHilipp Zabel
2009-05-27 15:12 ` Robert Jarzmik
2009-05-28 5:15 ` Philipp Zabel
2009-05-28 5:15 ` [PATCH 1/3] regulator/max1586: support increased V3 voltage range Philipp Zabel
2009-05-28 8:59 ` Mark Brown
2009-05-28 19:00 ` [PATCH] regulator/max1586: fix V3 gain calculation integer overflow Philipp Zabel
2009-05-28 20:36 ` Robert Jarzmik [this message]
2009-05-29 9:04 ` Liam Girdwood
2009-05-28 18:58 ` [PATCH 1/3] regulator/max1586: support increased V3 voltage range Robert Jarzmik
2009-05-28 19:01 ` pHilipp Zabel
2009-05-28 20:36 ` Robert Jarzmik
2009-05-28 5:15 ` [PATCH 4/5] pxa/mioa701: add V3 gain configuration for Maxim 1586 voltage regulator Philipp Zabel
2009-05-28 5:16 ` pHilipp Zabel
2009-05-29 6:22 ` Robert Jarzmik
2009-06-01 5:39 ` Eric Miao
2009-05-28 5:15 ` [PATCH 3/3] pxa/hx4700: add Maxim 1587A " Philipp Zabel
2009-06-01 5:37 ` Eric Miao
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