From: Grant Likely <grant.likely@arm.com>
To: Mark Brown <broonie@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
Sven Van Asbroeck <thesven73@gmail.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Jonathan Cameron <jonathan.cameron@huawei.com>,
Simon Han <z.han@kunbus.com>, Lukas Wunner <lukas@wunner.de>,
linux-spi <linux-spi@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
nd <nd@arm.com>
Subject: Re: [PATCH v1] spi: fix client driver breakages when using GPIO descriptors
Date: Wed, 25 Nov 2020 09:19:15 +0000 [thread overview]
Message-ID: <9c7aee21-0d08-9092-acdd-93477ed17dba@arm.com> (raw)
In-Reply-To: <20201118114049.GA4827@sirena.org.uk>
On 18/11/2020 11:40, Mark Brown wrote:
> On Wed, Nov 18, 2020 at 02:03:41AM +0100, Linus Walleij wrote:
>> On Mon, Nov 16, 2020 at 10:06 PM Mark Brown <broonie@kernel.org> wrote:
>
>>> I think the main push in the other direction has always been people who
>>> want to not have to write a driver at all and put absolutely everything
>>> into DT which has scaling issues :/
>
>> What I can't understand is what gave them that idea.
>
>> This thing looks like a dream to these people for example:
>> https://gist.github.com/Minecrell/56c2b20118ba00a9723f0785301bc5ec#file-dsi_panel_s6e88a0_ams452ef01_qhd_octa_video-dtsi
>> And it looks like a nightmare to me.
>
>> (There is even a tool to convert this description into a proper display
>> driver now.)
>
>> It just seems to be one of those golden hammer things: everything
>> start to look like nails.
>
> What people think they were sold was the idea that they shouldn't have
> to write driver code or upstream things, something with more AML like
> capabilities (not realising that AML works partly because ACPI hugely
> constrains system design).
And is also untrue. AML only provides an API abstraction for a specific
power management model. All the actual driving of the device still
requires driver code and requires reading devices-specific properties
out of the ACPI node.
g.
next prev parent reply other threads:[~2020-11-25 9:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-06 15:07 [PATCH v1] spi: fix client driver breakages when using GPIO descriptors Sven Van Asbroeck
2020-11-09 14:25 ` Andy Shevchenko
2020-11-09 14:41 ` Sven Van Asbroeck
2020-11-11 1:05 ` Linus Walleij
2020-11-11 12:33 ` Mark Brown
2020-11-11 13:36 ` Linus Walleij
2020-11-16 21:06 ` Mark Brown
2020-11-18 1:03 ` Linus Walleij
2020-11-18 11:40 ` Mark Brown
2020-11-24 15:21 ` Linus Walleij
2020-11-24 16:40 ` Mark Brown
2020-11-25 9:19 ` Grant Likely [this message]
2020-11-25 9:17 ` Grant Likely
2020-11-11 1:08 ` Linus Walleij
2020-11-11 15:48 ` Mark Brown
2020-11-11 16:24 ` Sven Van Asbroeck
2020-11-11 16:32 ` Mark Brown
2020-11-12 11:41 ` Charles Keepax
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=9c7aee21-0d08-9092-acdd-93477ed17dba@arm.com \
--to=grant.likely@arm.com \
--cc=andy.shevchenko@gmail.com \
--cc=broonie@kernel.org \
--cc=jonathan.cameron@huawei.com \
--cc=linus.walleij@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-spi@vger.kernel.org \
--cc=lukas@wunner.de \
--cc=nd@arm.com \
--cc=robh+dt@kernel.org \
--cc=thesven73@gmail.com \
--cc=z.han@kunbus.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 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.