linux-kernel - Re: [PATCH v2] Add ltc3562 voltage regulator driver

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Message-ID: <54589472.8030305@topic.nl>
Date:	Tue, 4 Nov 2014 09:55:14 +0100
From:	Mike Looijmans <mike.looijmans@...ic.nl>
To:	Mark Brown <broonie@...nel.org>
CC:	<lgirdwood@...il.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] Add ltc3562 voltage regulator driver

On 11/03/2014 06:38 PM, Mike Looijmans wrote:
> On 3-11-2014 16:10, Mark Brown wrote:
>> On Mon, Nov 03, 2014 at 03:48:56PM +0100, Mike Looijmans wrote:
>>> On 11/03/2014 01:09 PM, Mark Brown wrote:
>>
>>>> No function calls, just use regulators_node.  What is unclear about the
>>>> functionality?
>>
>>> I don't understand what you mean by "regulators_node".
>>
>>> "grep -R regulators_node *" in the kernel source tree returns no results,
>>> nor does http://lxr.free-electrons.com/ident?i=regulators_node
>>
>> You need to develop against current versions of the kernel, this is
>> something that was merged into Linus' tree during the merge window.
>
> Is this an absolute show-stopper for you?
>
> With some effort I could move from our current 3.15 to 3.17, but even that
> wouldn't be recent enough then. I can justify spending a few days on getting
> the driver integrated into mainline, even if the initial version cost less
> than that; but moving everything to mainline is going to take weeks and the
> boss is definitely going to say "no" to that.

More important than that: Since this chip powers the IO banks, we need it for 
our own products, and hence it has to work (also) on the current 3.15 kernel. 
Using APIs from 3.18 wouold render the driver useless to ourselves.



Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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