From: Baolin Wang <baolin.wang@linaro.org>
To: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Mark Brown <broonie@kernel.org>,
Linux LED Subsystem <linux-leds@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 1/2] leds: core: Introduce generic pattern interface
Date: Mon, 16 Jul 2018 19:08:58 +0800 [thread overview]
Message-ID: <CAMz4kuKw+nQp55w5XeNYE3TVq1KnQFG3-yEsG4vANqu4yC3CTA@mail.gmail.com> (raw)
In-Reply-To: <1138f834-e805-6076-bb5b-aa1fdc1f2606@gmail.com>
On 15 July 2018 at 20:22, Jacek Anaszewski <jacek.anaszewski@gmail.com> wrote:
> On 07/15/2018 12:39 AM, Pavel Machek wrote:
>>
>> On Sun 2018-07-15 00:29:25, Pavel Machek wrote:
>>>
>>> On Sun 2018-07-15 00:02:57, Jacek Anaszewski wrote:
>>>>
>>>> Hi Pavel,
>>>>
>>>> On 07/14/2018 11:20 PM, Pavel Machek wrote:
>>>>>
>>>>> Hi!
>>>>>
>>>>>>> It also drew my attention to the issue of desired pattern sysfs
>>>>>>> interface semantics on uninitialized pattern. In your implementation
>>>>>>> user seems to be unable to determine if the pattern is activated
>>>>>>> or not. We should define the semantics for this use case and
>>>>>>> describe it in the documentation. Possibly pattern could
>>>>>>> return alone new line character then.
>>>>>
>>>>>
>>>>> Let me take a step back: we have triggers.. like LED blinking.
>>>>>
>>>>> How is that going to interact with patterns? We probably want the
>>>>> patterns to be ignored in that case...?
>>>>>
>>>>> Which suggest to me that we should treat patterns as a trigger. I
>>>>> believe we do something similar with blinking already.
>>>>>
>>>>> Then it is easy to determine if pattern is active, and pattern
>>>>> vs. trigger issue is solved automatically.
>>>>
>>>>
>>>> I'm all for it. I proposed this approach during the previous
>>>> discussions related to possible pattern interface implementations,
>>>> but you seemed not to be so enthusiastic in [0].
>>>>
>>>> [0] https://lkml.org/lkml/2017/4/7/350
>>>
>>>
>>> Hmm. Reading my own email now, I can't decipher it.
>>>
>>> I believe I meant "changing patterns from kernel in response to events
>>> is probably overkill"... or something like that.
>>
>>
>> Anyway -- to clean up the confusion -- I'd like to see
>>
>> echo pattern > trigger
>> echo "1 2 3 4 5 6 7 8" > somewhere
>
>
> s/somewhere/pattern/
>
> pattern trigger should create "pattern" file similarly how ledtrig-timer
> creates delay_{on|off} files.
Yes. Anyway, I will submit V5 patchset with addressing previous
comments, but did not include pattern trigger issue.
--
Baolin Wang
Best Regards
prev parent reply other threads:[~2018-07-16 11:09 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-29 5:03 [PATCH v3 1/2] leds: core: Introduce generic pattern interface Baolin Wang
2018-06-29 5:03 ` [PATCH v3 2/2] leds: sc27xx: Add pattern_set/get/clear interfaces for LED controller Baolin Wang
2018-07-11 11:02 ` [PATCH v3 1/2] leds: core: Introduce generic pattern interface Baolin Wang
2018-07-11 21:10 ` Jacek Anaszewski
2018-07-12 12:24 ` Baolin Wang
2018-07-12 21:41 ` Jacek Anaszewski
2018-07-13 1:58 ` Baolin Wang
2018-07-14 21:20 ` Pavel Machek
2018-07-14 22:02 ` Jacek Anaszewski
2018-07-14 22:29 ` Pavel Machek
2018-07-14 22:39 ` Pavel Machek
2018-07-15 12:22 ` Jacek Anaszewski
2018-07-16 1:00 ` David Lechner
2018-07-16 20:29 ` Jacek Anaszewski
2018-07-16 21:56 ` Pavel Machek
2018-07-17 20:26 ` Jacek Anaszewski
2018-07-17 21:07 ` Pavel Machek
2018-07-24 0:35 ` Bjorn Andersson
2018-07-18 7:56 ` Pavel Machek
2018-07-18 11:32 ` Baolin Wang
2018-07-18 12:08 ` Pavel Machek
2018-07-18 17:00 ` David Lechner
2018-07-20 19:11 ` Jacek Anaszewski
2018-07-24 0:55 ` Bjorn Andersson
2018-07-18 18:54 ` Jacek Anaszewski
2018-07-18 19:22 ` Jacek Anaszewski
2018-07-18 22:13 ` David Lechner
2018-07-18 22:17 ` Pavel Machek
2018-07-19 20:20 ` Pavel Machek
2018-07-20 18:08 ` Jacek Anaszewski
2018-07-23 6:59 ` Baolin Wang
2018-07-24 11:41 ` Pavel Machek
2018-07-27 5:15 ` Baolin Wang
2018-07-27 8:36 ` Pavel Machek
2018-07-27 8:41 ` Baolin Wang
2018-07-24 11:50 ` Pavel Machek
2018-07-24 0:18 ` Bjorn Andersson
2018-07-16 11:08 ` Baolin Wang [this message]
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=CAMz4kuKw+nQp55w5XeNYE3TVq1KnQFG3-yEsG4vANqu4yC3CTA@mail.gmail.com \
--to=baolin.wang@linaro.org \
--cc=bjorn.andersson@linaro.org \
--cc=broonie@kernel.org \
--cc=jacek.anaszewski@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-leds@vger.kernel.org \
--cc=pavel@ucw.cz \
/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).