linux-kernel - Re: [PATCH 09/27] mmc: mvsdio: Remove redundant suspend and resume callbacks

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Date:	Thu, 26 Sep 2013 11:40:19 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>
cc:	linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
	Chris Ball <cjb@...top.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH 09/27] mmc: mvsdio: Remove redundant suspend and resume
 callbacks

On Thu, 26 Sep 2013, Ulf Hansson wrote:

> Suspend and resume of cards are handled by the protocol layer and
> consequently the mmc_suspend|resume_host APIs are marked as deprecated.

Having the protocol layer take care of card suspend is perfectly sound.

However, what about host controllers?  Shouldn't they suspend themselves 
as well?  There is certainly potential for power saving by gating clocks 
to the host IP block or the like.


Nicolas
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