linux-kernel - Re: [PATCH 2.6.29-rc1-git4] mfd: da9030 usb charge pump support within mfd driver.

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Date:	Thu, 15 Jan 2009 11:14:13 +0000
From:	Jonathan Cameron <Jonathan.Cameron@...il.com>
To:	Mike Rapoport <mike@...pulab.co.il>
CC:	Jonathan Cameron <jic23@....ac.uk>,
	LKML <linux-kernel@...r.kernel.org>,
	Mark Brown <broonie@...ena.org.uk>,
	Samuel Ortiz <sameo@...nedhand.com>,
	eric miao <eric.y.miao@...il.com>, felipe.balbi@...ia.com,
	Liam Girdwood <lrg@...nel.org>
Subject: Re: [PATCH 2.6.29-rc1-git4] mfd: da9030 usb charge pump support within
 mfd driver.

Mike Rapoport wrote:
> Jonathan,
> Below are my two cents :)
Thanks. 
> Jonathan Cameron wrote:
>> From: Jonathan Cameron <jic23@....ac.uk>
>>
>> Add support for changing the mode of the da9030 usb charge pump
>>
>> Signed-off-by: Jonathan Cameron <jic23@....ac.uk>
>>
>> ---
>>
>> Minor changes from previous version to reflect changes in the
>> driver being patched. Addtional cc's as per Mark's suggestion.
>>
>> This version simply adds the functionality to the da903x mfd driver
>> core. If anyone can suggest a way round simply maintaining a
>> global pointer to the device it would be good.
> 
> I don't think the global pointer here is real problem. It should be *really*
> weird design with two da903x.
Would be 'unusual'!
 
>> To be able to call this from a board config file the driver must be
>> built in rather than a module but enforcing that is down to the
>> board Kconfig entry.
> 
> Most probably the board with da9030 will anyway have it built-in...
Agreed.
>> +EXPORT_SYMBOL_GPL(da9030_set_usb_charge_pump_mode);
>> +
> 
> Maybe we want to have 'da9030_set_usb_charge_pump_mode' as well?
(get?)
Possibly, though only purpose I can think of for this would be debugging
and from the datasheet I can't see any case under which the set can fail?


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