From: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
To: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>
Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Fabio Estevam
<fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Sanchayan Maity
<maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Srinivas Kandagatla
<srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Sascha Hauer <kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Shawn Guo <shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH V4 RFC 2/3] nvmem: add driver for ocotp in i.MX23 and i.MX28
Date: Mon, 20 Jul 2015 08:45:21 +0200 [thread overview]
Message-ID: <55AC9901.1040402@i2se.com> (raw)
In-Reply-To: <201507200012.13608.marex-ynQEQJNshbs@public.gmane.org>
Hi Marek,
Am 20.07.2015 um 00:12 schrieb Marek Vasut:
> On Monday, July 20, 2015 at 12:04:58 AM, Stefan Wahren wrote:
>> This patch brings read-only support for the On-Chip OTP cells
>> in the i.MX23 and i.MX28 processor. The driver implements the
>> new NVMEM provider API.
>>
>> Signed-off-by: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
> How come this driver isn't doing any manipulation with the VDDIO
> voltage -- or did I miss that? I seem to remember that the VDDIO
> had to be lowered to 2.8V before the fuses could be programmed
> and restored to 3.3V afterward. See for example recent mainline
> u-boot, drivers/misc/mxs_ocotp.c .
Why should the driver implement VDDIO manipulation when there is only
read-only support for the OTP bits? There is no ambition to implement
write support. Maybe i should clarify that in the comments.
Btw i'm on your side that because programming the OTP from userspace is
to dangerous.
Best regards
Stefan
>
> Best regards,
> Marek Vasut
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2015-07-20 6:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-19 22:04 [PATCH V4 RFC 0/3] nvmem: add ocotp support for i.MX23 and i.MX28 Stefan Wahren
[not found] ` <1437343499-16422-1-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org>
2015-07-19 22:04 ` [PATCH V4 RFC 1/3] DT: nvmem: add binding for mxs-ocotp Stefan Wahren
2015-07-19 22:04 ` [PATCH V4 RFC 2/3] nvmem: add driver for ocotp in i.MX23 and i.MX28 Stefan Wahren
[not found] ` <1437343499-16422-3-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org>
2015-07-19 22:12 ` Marek Vasut
[not found] ` <201507200012.13608.marex-ynQEQJNshbs@public.gmane.org>
2015-07-20 6:45 ` Stefan Wahren [this message]
[not found] ` <55AC9901.1040402-eS4NqCHxEME@public.gmane.org>
2015-07-20 8:15 ` Marek Vasut
2015-07-19 22:04 ` [PATCH V4 RFC 3/3] mxs: enable ocotp for " Stefan Wahren
2015-07-19 22:07 ` [PATCH V4 RFC 0/3] nvmem: add ocotp support " Marek Vasut
[not found] ` <201507200007.30100.marex-ynQEQJNshbs@public.gmane.org>
2015-07-20 6:37 ` Stefan Wahren
[not found] ` <55AC970D.6090707-eS4NqCHxEME@public.gmane.org>
2015-07-20 8:16 ` Marek Vasut
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55AC9901.1040402@i2se.com \
--to=stefan.wahren-es4nqchxeme@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org \
--cc=galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org \
--cc=ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org \
--cc=kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=maitysanchayan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=marex-ynQEQJNshbs@public.gmane.org \
--cc=mark.rutland-5wv7dgnIgG8@public.gmane.org \
--cc=maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org \
--cc=pawel.moll-5wv7dgnIgG8@public.gmane.org \
--cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=srinivas.kandagatla-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).