linux-kernel - Re: [PATCH] net/smsc911x: Add minimal runtime PM support

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Message-Id: <20141124.164204.382324382412456341.davem@davemloft.net>
Date:	Mon, 24 Nov 2014 16:42:04 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	geert+renesas@...der.be
Cc:	steve.glendinning@...well.net, netdev@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/smsc911x: Add minimal runtime PM support

From: Geert Uytterhoeven <geert+renesas@...der.be>
Date: Mon, 24 Nov 2014 19:58:17 +0100

> Add minimal runtime PM support (enable on probe, disable on remove), to
> ensure proper operation with a parent device that uses runtime PM.
> 
> This is needed on systems where the external bus controller module of
> the SoC is contained in a PM domain and/or has a gateable functional
> clock. In such cases, before accessing any device connected to the
> external bus, the PM domain must be powered up, and/or the functional
> clock must be enabled, which is typically handled through runtime PM by
> the bus controller driver.
> 
> An example of this is the kzm9g development board, where an smsc9220
> Ethernet controller is connected to the Bus State Controller (BSC) of a
> Renesas sh73a0 SoC.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

Applied to net-next, thanks!
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