From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Hurley <peter@hurleysoftware.com>
Subject: Re: What to set uart_port->irq to for polled driver?
Date: Thu, 28 Feb 2013 13:32:18 -0500
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To: Grant Edwards <grant.b.edwards@gmail.com>
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On Wed, 2013-02-13 at 15:24 +0000, Grant Edwards wrote:
> For a polled serial driver that doesn't use interrupts, to what should
> the "irq" field in the uart_port structure be set?  Should it be 0?
> Should it be the unused IRQ associated with the PCI card slot in which
> the board is found?

Doesn't look supported, but adding the support doesn't look difficult.
At the very least, a patch is required so that on port shutdown, the
core doesn't synchronize_irq().

Regards,
Peter Hurley