linux-kernel - Re: [PATCH 06/16] usb: musb: dsps: rename ti81xx_driver_data to am33xx_driver

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Message-ID: <51F14165.3060803@linutronix.de>
Date:	Thu, 25 Jul 2013 17:16:53 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Bin Liu <binmlist@...il.com>
CC:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	balbi@...com, george.cherian@...com
Subject: Re: [PATCH 06/16] usb: musb: dsps: rename ti81xx_driver_data to am33xx_driver_data

On 07/25/2013 05:12 PM, Bin Liu wrote:
> Sebastian,

Hi Bin,

>> Is it really there or was it never there and it has been added to TRM by
>> accident?
> The EOI register IS in the USB subsystem of AM33xx, but the SoC does
> not use it because it uses level triggering for USB interrupt.

I see.

>>> But I am not sure if it is a good idea to remove eoi from the musb_dsps
>>> driver. If the intension is to merge the support for other SoC, such as
>>> AM35xx, AM18xx, then EOI handling might be still needed. I just don't know
>>> how those devices use EOI.
>>
>> If one of the architectures gets added which need an EOI then the offset
>> can be 0 and the EOI will happen only if it is != 0.
> This patch cleaned up the use of EOI. Do you mean EOI handling will be
> added back with condition EOI offset != 0, when the support of new
> device which uses EIO is added?

That is my intention.

> Regards,
> -Bin.

Sebastian
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