Re: [PATCH 3/5] mmc: sdhci-pltfm: Do not use parent as the host's device

[Pawel Moll <pawel.moll@arm.com>]

On Fri, 2014-07-25 at 15:23 +0100, Pawel Moll wrote:
> The code selecting a device for the sdhci host has been
> continuously tweaked (4b711cb13843f5082e82970dd1e8031383134a65
> "mmc: sdhci-pltfm: Add structure for host-specific data" and
> a4d2177f00a5252d825236c5124bc1e9918bdb41 "mmc: sdhci-pltfm: dt
> device does not pass parent to sdhci_alloc_host") while there
> does not seem to be any reason to use platform device's parent
> in the first place.
> 
> The comment saying "Some PCI-based MFD need the parent here"
> seem to refer to Timberdale FPGA driver (the only MFD driver
> registering SDHCI cell, drivers/mfd/timberdale.c) but again,
> the only situation when parent device matter is runtime PM,
> which is not implemented for Timberdale.
> 
> Cc: Chris Ball <chris@printf.net>
> Cc: Anton Vorontsov <anton@enomsg.org>
> Cc: Ulf Hansson <ulf.hansson@linaro.org>
> Cc: linux-mmc@vger.kernel.org
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
> ---
> 
> This patch is a part of effort to remove references to platform_bus
> and make it static.
> 
> Chris, Anton, Ulf - could you please advise if the assumptions
> above are correct or if I'm completely wrong? Do you know what
> where the real reasons to use parent originally? The PCI comment
> seems like a red herring to me...

Can I take the silence as a suggestion that the change looks ok-ish for
you?

Paweł