From: Ben Dooks <ben@trinity.fluff.org>
To: Daniel Drake <dsd@laptop.org>
Cc: linux-mmc@vger.kernel.org
Subject: Re: reference implementation of runtime PM
Date: Mon, 6 Dec 2010 18:56:15 +0000 [thread overview]
Message-ID: <20101206185615.GK2495@trinity.fluff.org> (raw)
In-Reply-To: <AANLkTikK-SvvDHfeNHXP4tw_e3p3gZ4XaT8Ta5YpuDar@mail.gmail.com>
On Mon, Dec 06, 2010 at 05:57:22PM +0000, Daniel Drake wrote:
> Hi,
>
> I'm working on getting runtime pm working on the XO-1.5 laptop
> (sdhci-pci) in case it is related to some other power-related issues
> we have been having.
>
> Right now, when runtime is enabled, the card cannot be brought back
> online again after it has been powered off.
>
> I've dug down and I think that runtime PM is doing basically nothing.
> i.e. when the system decides to runtime-suspend my SD card, nothing
> actually happens to the SD card. It remains fully powered and
> untouched. I'm basing this assumption on mmc_power_save_host() which
> relies entirely on host->bus_ops->power_save() doing the actual
> power-down work. On sdhci this method does not exist.
you might want to add the linux-pm list to this.
--
Ben
Q: What's a light-year?
A: One-third less calories than a regular year.
next prev parent reply other threads:[~2010-12-06 18:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-06 17:57 reference implementation of runtime PM Daniel Drake
2010-12-06 18:56 ` Ben Dooks [this message]
2010-12-06 20:03 ` Daniel Drake
2010-12-06 21:42 ` Ohad Ben-Cohen
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