linux-kernel - Re: at91sam9260 wakeup on serial port

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Message-ID: <20080128145615.1d756025@dhcp-252-066.norway.atmel.com>
Date:	Mon, 28 Jan 2008 14:56:15 +0100
From:	Haavard Skinnemoen <hskinnemoen@...el.com>
To:	michael <trimarchi@...dalf.sssup.it>
Cc:	linux-kernel@...r.kernel.org, Andrew Victor <linux@...im.org.za>,
	David Brownell <david-b@...bell.net>
Subject: Re: at91sam9260 wakeup on serial port

On Mon, 28 Jan 2008 12:15:00 +0100
michael <trimarchi@...dalf.sssup.it> wrote:

> Hi,
> I implement a little patch (ndr just for a try) for the atmel serial 
> driver atmel_serial.c to wakeup the system when it is in suspend-ram state.
> I reconfigure the RXD pin as a gpio in suspend function and restore it 
> in the resume function. It is the correct way?

I'm not sure...this is rather platform-specific, so I don't think it
really belongs in the atmel_serial() driver. One solution might be to
add a function pointer to struct atmel_uart_data that the driver can
call from ->suspend() in order to let the platform code handle this as
appropriate.

Cc'ing Andrew Victor and David Brownell since they know the AT91
platform code better than me.

Haavard
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