linux-kernel - Re: [patch 4/4] MFD: Change mfd platform device usage to wrapper platform

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Date:	Wed, 9 Jul 2008 14:29:32 +0200
From:	"pHilipp Zabel" <philipp.zabel@...il.com>
To:	ian <spyro@....com>
Cc:	"Ben Dooks" <ben-linux@...ff.org>, Dmitry <dbaryshkov@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [patch 4/4] MFD: Change mfd platform device usage to wrapper platform_device

On Wed, Jul 9, 2008 at 2:13 PM, ian <spyro@....com> wrote:
> On Wed, 2008-07-09 at 12:50 +0100, Ben Dooks wrote:
>>
>> So, the enable/disable calls might be useful, however is there any
>> reason this could not be handled by the clock framework? The
>> suspend/resume entries where not used, and I belive should not be in
>> here.
>
> Hi Ben,
>
> I agree with you on wrapping the platform device, however the enable /
> disable methods must stay.

Ack on that. Also look also at the ds1wm driver. Right now it provides
its own enable/disable methods in platform data because it predates
the MFD core. It should be changed into an MFD cell driver, so
enable/disable methods in mfd_cell would be most useful for it.

> Other cores need them, and they arent only there for clock support.
>
> I've just looked at the TMIO MMC driver to refersh my memory and the
> suspend / resume hooks must stay also. TMIO MMC needs to be handled
> differently when suspending and when being disabled (loss of state when
> disabled).
>
> As yet, only tc6393 is 'in tree' but Im waiting for the core to settle
> down before I convert my other TMIO based code (again again) to the new
> core.
>
> So, in summary -
>
> ACK to your changes to wrap the device as an 'mfd_device'
> NAK to deleting the mfd_cell power management.
>
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regards
Philipp
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