linux-kernel - Re: [PATCH v2 2/3] sdhci-pci : Enable runtime PM support

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Message-ID: <20110225145440.GA31620@srcf.ucam.org>
Date:	Fri, 25 Feb 2011 14:54:40 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"Tardy, Pierre" <pierre.tardy@...el.com>
Cc:	Chris Ball <cjb@...top.org>, Pierre Tardy <tardyp@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-pm@...ts.linux-foundation.org" 
	<linux-pm@...ts.linux-foundation.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Gao, Yunpeng" <yunpeng.gao@...el.com>
Subject: Re: [PATCH v2 2/3] sdhci-pci : Enable runtime PM support

On Fri, Feb 25, 2011 at 07:33:12AM +0000, Tardy, Pierre wrote:

> My understanding is the pci driver is not supposed to do any set_power_state/pci_save_state/wake_enable.
> Everything is supposed to be generically handle by pci frameworks's runtime_pm impl.
> Need confirmation from Rafael.

The core can only enable PME generation, it can't configure what 
generates PMEs. There's a register in sdhci that needs to be programmed 
to enable wakeups on card insert/removal/interrupt. If you don't then 
you won't get a PME no matter what the core does.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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