From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Is PPC 44x PIKA Warp board still relevant?
Date: Sat, 24 Sep 2022 22:06:07 -0700 [thread overview]
Message-ID: <Yy/hv2fOLzdWOuvT@google.com> (raw)
Hi Michael, Nick,
I was wondering if PIKA Warp board still relevant. The reason for my
question is that I am interested in dropping legacy gpio APIs,
especially OF-specific ones, in favor of newer gpiod APIs, and
arch/powerpc/platforms/44x/warp.c is one of few users of it.
The code in question is supposed to turn off green led and flash red led
in case of overheating, and is doing so by directly accessing GPIOs
owned by led-gpio driver without requesting/allocating them. This is not
really supported with gpiod API, and is not a good practice in general.
Before I spend much time trying to implement a replacement without
access to the hardware, I wonder if this board is in use at all, and if
it is how important is the feature of flashing red led on critical
temperature shutdown?
Thanks.
--
Dmitry
next reply other threads:[~2022-09-25 5:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-25 5:06 Dmitry Torokhov [this message]
2022-09-26 6:34 ` Is PPC 44x PIKA Warp board still relevant? Christophe Leroy
2022-09-26 10:41 ` Michael Ellerman
2022-09-27 6:01 ` Dmitry Torokhov
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=Yy/hv2fOLzdWOuvT@google.com \
--to=dmitry.torokhov@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=npiggin@gmail.com \
/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).