linux-kernel - Re: [PATCH] serial: 8250: Do XR17V35X specific wakeup in serial8250_do

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Date:	Tue, 28 Jul 2015 09:20:59 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Tony Lindgren <tony@...mide.com>,
	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>,
	Michael Welling <mwelling@...e.org>,
	Joe Schultz <jschultz@...-inc.com>
Subject: Re: [PATCH] serial: 8250: Do XR17V35X specific wakeup in
 serial8250_do_startup

Hi Peter,

On Fri, Jul 17, 2015 at 09:34:31AM -0400, Peter Hurley wrote:
> On 07/16/2015 04:29 AM, Joerg Roedel wrote:
> > From: Joerg Roedel <jroedel@...e.de>
> > 
> > The XR17V35X UART needs the ECB bit set in its XR_EFR
> > register to enable access to IER [7:5], ISR [5:4], FCR[5:4],
> > MCR[7:5], and MSR [7:0].
> > 
> > Also reset the IER register to mask interrupts after access
> > to all bits of this register has been enabled.
> > 
> > This makes my 8-port XR17V35X working with the in-kernel
> > serial driver.
> 
> Reviewed-by: Peter Hurley <peter@...leysoftware.com>

Thanks for your review.

> Also, would you please find out what bits are set in the IER
> that this fixes and let me know? I don't have this hardware.

Unfortunatly I put the card back into a production machine and can't
easily check this anymore. But I'll let you know when I update the
kernel on the box next time.


	Joerg

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