linux-kernel - Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx

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Message-ID: <5419B5E3.10307@linutronix.de>
Date:	Wed, 17 Sep 2014 18:25:07 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Peter Hurley <peter@...leysoftware.com>
CC:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	tony@...mide.com, balbi@...com, gregkh@...uxfoundation.org,
	Alan Cox <alan@...ux.intel.com>
Subject: Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround
 for AM33xx

On 09/17/2014 02:20 PM, Peter Hurley wrote:
>> So I connected my am335x-evm
>> with beagle board xm because both of them have an old fashion UART
>> connector (instead those uart-to-usb). Both configured with HW-Flow and
>> I haven't seen the function invoked but I saw "port->icount.overrun"
>> being incremented. This shouldn't happen. So I am a little puzzled here…
> 
> Yeah, that's weird. Do you have a break-out box to confirm that RTS/CTS are
> being driven?

Yeah, I've been thinking about that, too. I will be gone next week and
hopefully when I get back I will something around to test this.

> 
> Regards,
> Peter Hurley
> 

Sebastian
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