linux-kernel - RE: [RFC V1] mfd: da9063: Add support for AD silicon variant

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Message-ID: <6ED8E3B22081A4459DAC7699F3695FB7D0B26F49@SW-EX-MBX02.diasemi.com>
Date:	Thu, 17 Jul 2014 08:41:15 +0000
From:	"Opensource [Steve Twiss]" <stwiss.opensource@...semi.com>
To:	Alessandro Zummo <a.zummo@...ertech.it>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LINUX-KERNEL <linux-kernel@...r.kernel.org>,
	Lee Jones <lee.jones@...aro.org>,
	RTC-LINUX <rtc-linux@...glegroups.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	"David Dajun Chen" <david.chen@...semi.com>,
	Mark Brown <broonie@...aro.org>,
	"Philipp Zabel" <p.zabel@...gutronix.de>,
	Support Opensource <Support.Opensource@...semi.com>
Subject: RE: [RFC V1] mfd: da9063: Add support for AD silicon variant


On 16 July 2014 18:27 Alessandro Zummo wrote:

>From: Alessandro Zummo [mailto:a.zummo@...ertech.it]
>Sent: 16 July 2014 18:27
>To: Opensource [Steve Twiss]
>Cc: Andrew Morton; LINUX-KERNEL; Lee Jones; RTC-LINUX; Samuel Ortiz; David
>Dajun Chen; Mark Brown; Philipp Zabel; Support Opensource
>Subject: Re: [RFC V1] mfd: da9063: Add support for AD silicon variant
>
>On Wed, 16 Jul 2014 17:39:20 +0100
>"Opensource [Steve Twiss]" <stwiss.opensource@...semi.com> wrote:
>
>> The DA9063 probe function has been modified to use the compile time
>> directive CONFIG_MFD_DA9063_AD. This configuration option will allow
>> AD support only if this boolean is true, otherwise it will default to
>> support BB (or greater) silicon.
>
> any particular reason for not supporting both at the same time,
> either with a module option, platform data, dt, etc ?

Hi Alessandro,

If run-time distinction between AD and BB is used this makes the change
bigger, more complicated and difficult to understand.

These problems were discussed in a previous posting back in February
https://lkml.org/lkml/2014/2/16/29 

This change is just a supporting option for people who have the older AD silicon
in their hardware.

Regards,
Steve

>
>--
>
> Best regards,
>
> Alessandro Zummo,
>  Tower Technologies - Torino, Italy
>
>  http://www.towertech.it

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