linux-kernel - Re: [PATCH] cpsw: Fix interrupt storm among other things

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Date:	Wed, 30 Jan 2013 19:23:09 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
CC:	"Bedia, Vaibhav" <vaibhav.bedia@...com>,
	Richard Cochran <richardcochran@...il.com>,
	"Porter, Matt" <mporter@...com>,
	"Maupin, Chase" <chase.maupin@...com>,
	"Kridner, Jason" <jdk@...com>, Tony Lindgren <tony@...mide.com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpsw: Fix interrupt storm among other things

On 1/30/2013 7:21 PM, Pantelis Antoniou wrote:
> Hi Vaibhav,
>
> On Jan 30, 2013, at 3:47 PM, Bedia, Vaibhav wrote:
>
>> Hi Antoniou,
>>
>> On Wed, Jan 30, 2013 at 19:07:19, Pantelis Antoniou wrote:
>>> Hi Vaibhav,
>>>
>>> On Jan 30, 2013, at 3:29 PM, Bedia, Vaibhav wrote:
>>>
>>>> On Wed, Jan 30, 2013 at 18:14:30, Pantelis Antoniou wrote:
>>>>> Hi Vaibhav,
>>>>>
>>>>> On Jan 30, 2013, at 2:38 PM, Bedia, Vaibhav wrote:
>>>>>
>>>>>> On Wed, Jan 30, 2013 at 16:38:50, Pantelis Antoniou wrote:
>>>>>> [...]
>>>>>>> TBH I haven't found a simple way to print out the silicon revision number.
>>>>>>> Anyone on the list know a quick and dirty method?
>>>>>>>
>>>>>> You can dump the DEVICE_ID register @ 0x44e10600.
>>>>>> Bits 31:28 should be 0 for PG1.0 and 1 for PG2.0.
>>>>>>
>>>>> Thanks this works perfectly:
>>>>>
>>>>> original-bone:
>>>>> root@...glebone:~# devmem2 0x44e10600 w
>>>>> Read at address  0x44E10600 (0xb6ff4600): 0x0B94402E
>>>>>
>>>>> bone-black:
>>>>> root@...glebone:~# devmem2 0x44e10600 w
>>>>> Read at address  0x44E10600 (0xb6fcc600): 0x1B94402E
>>>>>
>>>> I just re-read the mail-chain and I am confused here.
>>>> So the patch in question is meant for Bone-A4 which has
>>>> PG1.0?
>>>>
>>> It is a general bug fix. The problem was discovered only on
>>> the bone black which has PG2.0 silicon. The driver has been
>>> tested and it works on the original bone with PG1.0 as well.
>>>
>> But Mugunthan mentioned that he doesn't see this on an EVM
>> with PG2.0 silicon... is there any board dependency here?
>>
> I don't know, but I doubt it. How about we wait for Mugunthan to
> send us what are the DEVICE_ID contents for his board.
>
>> Regards,
>> Vaibhav
> Regards
>
> -- Pantelis
>
This is the device ID which i have

[root@...go /]# devmem 0x44e10600
0x1B94402E

Regards
Mugunthan V N
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