linux-kernel - Re: [PATCH 8/10] OMAP: HSMMC: Make driver support dynamic idle

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Message-ID: <20090322153019.2ae32458@mjolnir.ossman.eu>
Date:	Sun, 22 Mar 2009 15:30:19 +0100
From:	Pierre Ossman <drzeus-mmc@...eus.cx>
To:	Adrian Hunter <adrian.hunter@...ia.com>
Cc:	Jarkko Lavinen <jarkko.lavinen@...ia.com>,
	Adrian Hunter <adrian.hunter@...ia.com>,
	Grazvydas Ignotas <notasas@...il.com>,
	David Brownell <david-b@...bell.net>,
	linux-omap Mailing List <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/10] OMAP: HSMMC: Make driver support dynamic idle

On Thu, 12 Mar 2009 18:23:46 +0200
Adrian Hunter <adrian.hunter@...ia.com> wrote:

> From 47b6de0fcfeb5948199dbed941847580bedc5315 Mon Sep 17 00:00:00 2001
> From: Amit Kucheria <amit.kucheria@...durent.com>
> Date: Thu, 12 Mar 2009 15:47:39 +0200
> Subject: [PATCH] OMAP: HSMMC: Make driver support dynamic idle
> 
> Add a timer that is kept active by MMC requests. FCLK is disabled on
> timeout.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@...durent.com>
> Signed-off-by: Jarkko Lavinen <jarkko.lavinen@...ia.com>
> Signed-off-by: Adrian Hunter <adrian.hunter@...ia.com>
> ---

NAK. This should be implemented in the core where we get a consistent
behaviour across all hosts. The principle with a timeout is sound
though.

As for the current state of the driver, stop fiddling with the clock
when it isn't necessary.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  rdesktop, core developer          http://www.rdesktop.org

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