[PATCH V4 RFC 0/3] nvmem: add ocotp support for i.MX23 and i.MX28

Stefan Wahren stefan.wahren at i2se.com
Sun Jul 19 23:37:01 PDT 2015

Hi Marek,

Am 20.07.2015 um 00:07 schrieb Marek Vasut:
> On Monday, July 20, 2015 at 12:04:56 AM, Stefan Wahren wrote:
>> This patch series brings read-only support for the On-Chip OTP cells
>> in the i.MX23 and i.MX28 processor.
>> It has been a long time since V3 of this series [1]. The last version has
>> been rejected because there was no standard interface to the OTP data. So
>> this version bases on V7 of the new NVMEM framework [2] which required a
>> nearly complete rewrite of the driver.
>> [1] -
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/295228.
>> html [2] -
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/355652.htm
>> l
> Are you sure you even want this support in kernel ?

definitely. But only read-only support make sense. Please believe me, i
didn't wait since last year for the NVMEM framework just for fun.

> Isn't it enough to have
> this in some manufacturing-time mutated bootloader to program the OTP once
> and never touch it again ?

No, our products uses a previous version of this patch series to set the
MAC address of a network interface from OTP data. I also get some
feedback from other users that they are happy about this driver.


> Best regards,
> Marek Vasut

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