linux-kernel - Re: [RFC PATCHv2 0/4] Support for OTP memory

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Message-ID: <AANLkTimP7_ADTd+9Wyc4tLtsXVnS=1EwTac1Z8CtgHV2@mail.gmail.com>
Date:	Thu, 24 Mar 2011 14:36:42 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	Jamie Iles <jamie@...ieiles.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...e.de
Subject: Re: [RFC PATCHv2 0/4] Support for OTP memory

On Thu, Mar 24, 2011 at 14:32, Jamie Iles wrote:
> On Thu, Mar 24, 2011 at 01:56:17PM -0400, Mike Frysinger wrote:
>> just an overview note here ... the Blackfin OTP is actually IP we
>> bought from someone (not sure if i can say more, although i dont know
>> the details myself ... i'd have to go ask around), so much of the
>> feedback i give about the structure of it most likely (hopefully) be
>> applicable to other people who have purchased this IP.  if/when anyone
>> who is also using this IP steps forward, we could even see about
>> generalizing the bfin-otp driver.
>
> Yes, we have a similar thing here - a block of OTP from an IP vendor and
> a wrapper to provide an AXI interface.  As far as I know there are only
> a few OTP vendors so there may well be plenty of common code in
> different OTP implementations.

do you guys wrap the interface ?  the Blackfin processors have an
on-chip ROM which provides higher level functions like
read/write/lock/etc...  the Linux driver uses those rather than
programming the memory mapped OTP interface itself since this
interface is not publicly documented.
-mike
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