From: Vaibhav Hiremath <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Shubhrajyoti Datta
<shubhrajyoti.datta-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>,
Yi Zhang <yizhang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
robert.jarzmik-GANU6spQydw@public.gmane.org
Subject: Re: [PATCH-v5 2/5] i2c: pxa: enable/disable i2c module across msg xfer
Date: Wed, 05 Aug 2015 18:12:09 +0530 [thread overview]
Message-ID: <55C204A1.3060206@linaro.org> (raw)
In-Reply-To: <CAKfKVtGzDjgHzy70aa0d2W=ROMcxVzerg-qpuB9e4PaGKPpMTQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Wednesday 05 August 2015 04:16 PM, Shubhrajyoti Datta wrote:
> hi ,
> On Tue, Jul 21, 2015 at 6:11 PM, Vaibhav Hiremath
> <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:
>> From: Yi Zhang <yizhang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
>>
>> Enable i2c module/unit before transmission and disable when it
>> finishes.
>>
>> why?
>> It's because the i2c bus may be disturbed if the slave device,
>> typically a touch, powers on.
>
> Why should that be an issue?
> Is it an errata.
>
Not I am aware of.
> In which mode it is an issue slave / master or both?
>
since it talks about touch, I expect it to be master mode.
Thanks,
Vaibhav
WARNING: multiple messages have this Message-ID (diff)
From: vaibhav.hiremath@linaro.org (Vaibhav Hiremath)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH-v5 2/5] i2c: pxa: enable/disable i2c module across msg xfer
Date: Wed, 05 Aug 2015 18:12:09 +0530 [thread overview]
Message-ID: <55C204A1.3060206@linaro.org> (raw)
In-Reply-To: <CAKfKVtGzDjgHzy70aa0d2W=ROMcxVzerg-qpuB9e4PaGKPpMTQ@mail.gmail.com>
On Wednesday 05 August 2015 04:16 PM, Shubhrajyoti Datta wrote:
> hi ,
> On Tue, Jul 21, 2015 at 6:11 PM, Vaibhav Hiremath
> <vaibhav.hiremath@linaro.org> wrote:
>> From: Yi Zhang <yizhang@marvell.com>
>>
>> Enable i2c module/unit before transmission and disable when it
>> finishes.
>>
>> why?
>> It's because the i2c bus may be disturbed if the slave device,
>> typically a touch, powers on.
>
> Why should that be an issue?
> Is it an errata.
>
Not I am aware of.
> In which mode it is an issue slave / master or both?
>
since it talks about touch, I expect it to be master mode.
Thanks,
Vaibhav
WARNING: multiple messages have this Message-ID (diff)
From: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
To: Shubhrajyoti Datta <shubhrajyoti.datta@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Wolfram Sang <wsa@the-dreams.de>, Yi Zhang <yizhang@marvell.com>,
linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
robert.jarzmik@free.fr
Subject: Re: [PATCH-v5 2/5] i2c: pxa: enable/disable i2c module across msg xfer
Date: Wed, 05 Aug 2015 18:12:09 +0530 [thread overview]
Message-ID: <55C204A1.3060206@linaro.org> (raw)
In-Reply-To: <CAKfKVtGzDjgHzy70aa0d2W=ROMcxVzerg-qpuB9e4PaGKPpMTQ@mail.gmail.com>
On Wednesday 05 August 2015 04:16 PM, Shubhrajyoti Datta wrote:
> hi ,
> On Tue, Jul 21, 2015 at 6:11 PM, Vaibhav Hiremath
> <vaibhav.hiremath@linaro.org> wrote:
>> From: Yi Zhang <yizhang@marvell.com>
>>
>> Enable i2c module/unit before transmission and disable when it
>> finishes.
>>
>> why?
>> It's because the i2c bus may be disturbed if the slave device,
>> typically a touch, powers on.
>
> Why should that be an issue?
> Is it an errata.
>
Not I am aware of.
> In which mode it is an issue slave / master or both?
>
since it talks about touch, I expect it to be master mode.
Thanks,
Vaibhav
next prev parent reply other threads:[~2015-08-05 12:42 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-21 12:41 [PATCH-v5 0/5] i2c: pxa: Add support for PXA910 family of device Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
2015-07-21 12:41 ` [PATCH-v5 1/5] Documentation: binding: add new property 'disable_after_xfer' to i2c-pxa Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
2015-07-27 14:09 ` Matt Porter
2015-07-27 14:09 ` Matt Porter
2015-08-05 6:34 ` Vaibhav Hiremath
2015-08-05 6:34 ` Vaibhav Hiremath
2015-08-05 8:49 ` Wolfram Sang
2015-08-05 8:49 ` Wolfram Sang
2015-08-05 9:41 ` Vaibhav Hiremath
2015-08-05 9:41 ` Vaibhav Hiremath
2015-08-05 14:24 ` Matt Porter
2015-08-05 14:24 ` Matt Porter
2015-08-05 14:24 ` Matt Porter
[not found] ` <55C1AE71.3010700-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-08-05 14:20 ` Matt Porter
2015-08-05 14:20 ` Matt Porter
2015-08-05 14:20 ` Matt Porter
2015-08-05 14:24 ` Vaibhav Hiremath
2015-08-05 14:24 ` Vaibhav Hiremath
2015-07-21 12:41 ` [PATCH-v5 2/5] i2c: pxa: enable/disable i2c module across msg xfer Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
[not found] ` <1437482466-16126-3-git-send-email-vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-08-05 10:46 ` Shubhrajyoti Datta
2015-08-05 10:46 ` Shubhrajyoti Datta
2015-08-05 10:46 ` Shubhrajyoti Datta
[not found] ` <CAKfKVtGzDjgHzy70aa0d2W=ROMcxVzerg-qpuB9e4PaGKPpMTQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-05 12:42 ` Vaibhav Hiremath [this message]
2015-08-05 12:42 ` Vaibhav Hiremath
2015-08-05 12:42 ` Vaibhav Hiremath
2015-07-21 12:41 ` [PATCH-v5 3/5] i2c: pxa: Add support for pxa910/988 & new configuration features Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
2015-07-21 12:41 ` [PATCH-v5 4/5] Documentation: binding: add sclk adjustment properties to i2c-pxa Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
[not found] ` <1437482466-16126-5-git-send-email-vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-07-27 14:11 ` Matt Porter
2015-07-27 14:11 ` Matt Porter
2015-07-27 14:11 ` Matt Porter
2015-08-05 6:29 ` Vaibhav Hiremath
2015-08-05 6:29 ` Vaibhav Hiremath
2015-08-05 6:29 ` Vaibhav Hiremath
2015-07-21 12:41 ` [PATCH-v5 5/5] i2c: pxa: Add ILCR (tLow & tHigh) configuration support Vaibhav Hiremath
2015-07-21 12:41 ` Vaibhav Hiremath
[not found] ` <1437482466-16126-6-git-send-email-vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-08-05 8:51 ` Vaibhav Hiremath
2015-08-05 8:51 ` Vaibhav Hiremath
2015-08-05 8:51 ` Vaibhav Hiremath
[not found] ` <55C1CE8E.9000601-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-08-05 19:11 ` Robert Jarzmik
2015-08-05 19:11 ` Robert Jarzmik
2015-08-05 19:11 ` Robert Jarzmik
2015-08-06 5:45 ` Vaibhav Hiremath
2015-08-06 5:45 ` Vaibhav Hiremath
2015-08-09 12:18 ` Robert Jarzmik
2015-08-09 12:18 ` Robert Jarzmik
2015-08-09 12:18 ` Robert Jarzmik
2015-08-09 16:53 ` Vaibhav Hiremath
2015-08-09 16:53 ` Vaibhav Hiremath
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=55C204A1.3060206@linaro.org \
--to=vaibhav.hiremath-qsej5fyqhm4dnm+yrofe0a@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=robert.jarzmik-GANU6spQydw@public.gmane.org \
--cc=shubhrajyoti.datta-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org \
--cc=yizhang-eYqpPyKDWXRBDgjK7y7TUQ@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.