From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Chou <thomas@wytron.com.tw>
Date: Wed, 16 Dec 2015 21:44:04 +0800
Subject: [U-Boot] [PATCH] nios2: display altera sysid at startup
In-Reply-To: <201512161423.23814.marex@denx.de>
References: <1450253267-19625-1-git-send-email-thomas@wytron.com.tw>
 <201512161125.05738.marex@denx.de> <567162C2.8090408@wytron.com.tw>
 <201512161423.23814.marex@denx.de>
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To: u-boot@lists.denx.de

Hi Marek,

On 2015?12?16? 21:23, Marek Vasut wrote:
> On Wednesday, December 16, 2015 at 02:10:26 PM, Thomas Chou wrote:
>> Hi Marek,
>
> Hi!
>
>> On 2015?12?16? 18:25, Marek Vasut wrote:
>>> On Wednesday, December 16, 2015 at 09:07:47 AM, Thomas Chou wrote:
>>>> Display altera sysid at startup, which was once removed during
>>>> the move.
>>>>
>>>> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
>>>
>>> What if the sysid block isn't part of the design ?
>>
>> If the sysid block is not present, nothing will display and it is not an
>> error.
>
> Won't this cause bus stall if you try to access unpopulated location ?

It will be accessed though DT binding. As long as DT is correct, it 
won't access unpopulated location.

With the Altera Avalon bus, even a unpopulated access will not stall.

Best regards,
Thomas