From: Andrew Lunn <andrew@lunn.ch>
To: Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
Jon Nettleton <jon@solid-run.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Marc Zyngier <maz@kernel.org>,
Makarand Pawagi <makarand.pawagi@nxp.com>,
Calvin Johnson <calvin.johnson@nxp.com>,
stuyoder@gmail.com, nleeder@codeaurora.org,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Cristi Sovaiala <cristian.sovaiala@nxp.com>,
Hanjun Guo <guohanjun@huawei.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Pankaj Bansal <pankaj.bansal@nxp.com>,
Russell King <linux@armlinux.org.uk>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Len Brown <lenb@kernel.org>, Jason Cooper <jason@lakedaemon.net>,
Andy Wang <Andy.Wang@arm.com>, Varun Sethi <V.Sethi@nxp.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
Paul Yang <Paul.Yang@arm.com>,
"<netdev@vger.kernel.org>" <netdev@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [EXT] Re: [PATCH] bus: fsl-mc: Add ACPI support for fsl-mc
Date: Fri, 31 Jan 2020 16:09:29 +0100 [thread overview]
Message-ID: <20200131150929.GB13902@lunn.ch> (raw)
In-Reply-To: <20200131144737.GA4948@willie-the-truck>
> Devicetree to the rescue!
Yes, exactly. We have good, standardised descriptions for most of this
in device tree. And phylink can handle SFP and SFP+. Nobody has worked
on QSFP yet, since phylink has mostly been pushed by the embedded
world and 40G is not yet popular in the embedded world.
> Entertaining the use of ACPI without any firmware abstraction for this
> hardware really feels like a square peg / round hole situation, so I'm
> assuming somebody's telling you that you need it "FOAR ENTAPRYZE". Who
> is it and can you tell them to bog off?
The issues here is that SFPs are appearing in more and more server
systems, replacing plain old copper Ethernet. If the boxes use off the
shelf Mellanox or Intel PCIe cards, it is not an issue. But silicon
vendors are integrating this into the SoC in the ARM way of doing
things, memory mapped, spread over a number of controllers, not a
single PCIe device.
Maybe we need hybrid systems. Plain, old, simple, boring things like
CPUs, serial ports, SATA, PCIe busses are described in ACPI. Complex
interesting things are in DT. The hard thing is the interface between
the two. DT having a phandle to an ACPI object, e.g a GPIO, interrupt
or an i2c bus.
Andrew
next prev parent reply other threads:[~2020-01-31 15:09 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 8:08 [PATCH] bus: fsl-mc: Add ACPI support for fsl-mc Makarand Pawagi
2020-01-28 10:58 ` Marc Zyngier
2020-01-28 11:09 ` Lorenzo Pieralisi
2020-01-31 10:35 ` [EXT] " Makarand Pawagi
2020-01-31 11:06 ` Lorenzo Pieralisi
2020-01-31 11:06 ` Marc Zyngier
2020-01-31 12:01 ` Ard Biesheuvel
2020-01-31 12:28 ` Jon Nettleton
2020-01-31 12:48 ` Robin Murphy
2020-01-31 13:11 ` Jon Nettleton
2020-01-31 13:29 ` Ard Biesheuvel
2020-01-31 13:39 ` Robin Murphy
2020-01-31 14:29 ` Andrew Lunn
2020-01-31 14:47 ` Will Deacon
2020-01-31 15:09 ` Andrew Lunn [this message]
2020-01-31 15:14 ` Jon Nettleton
2020-01-31 15:41 ` Andrew Lunn
2020-01-31 15:39 ` Russell King - ARM Linux admin
2020-01-31 15:15 ` Russell King - ARM Linux admin
2020-01-31 15:40 ` Jakub Kicinski
2020-02-01 11:49 ` Russell King - ARM Linux admin
2020-02-01 17:36 ` Jakub Kicinski
2020-02-14 15:05 ` Pankaj Bansal
2020-02-14 15:54 ` Marc Zyngier
2020-02-14 15:58 ` Pankaj Bansal
2020-02-14 16:19 ` Lorenzo Pieralisi
2020-02-14 16:35 ` Pankaj Bansal
2020-02-14 17:49 ` Lorenzo Pieralisi
2020-02-17 12:35 ` Pankaj Bansal
2020-02-17 15:25 ` Lorenzo Pieralisi
2020-02-17 15:35 ` Marc Zyngier
2020-02-17 16:26 ` Lorenzo Pieralisi
2020-02-18 8:02 ` Pankaj Bansal (OSS)
2020-02-14 16:29 ` Robin Murphy
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=20200131150929.GB13902@lunn.ch \
--to=andrew@lunn.ch \
--cc=Andy.Wang@arm.com \
--cc=Paul.Yang@arm.com \
--cc=V.Sethi@nxp.com \
--cc=ard.biesheuvel@linaro.org \
--cc=calvin.johnson@nxp.com \
--cc=cristian.sovaiala@nxp.com \
--cc=guohanjun@huawei.com \
--cc=ioana.ciornei@nxp.com \
--cc=jason@lakedaemon.net \
--cc=jon@solid-run.com \
--cc=laurentiu.tudor@nxp.com \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=lorenzo.pieralisi@arm.com \
--cc=makarand.pawagi@nxp.com \
--cc=maz@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=nleeder@codeaurora.org \
--cc=pankaj.bansal@nxp.com \
--cc=rjw@rjwysocki.net \
--cc=robin.murphy@arm.com \
--cc=shameerali.kolothum.thodi@huawei.com \
--cc=stuyoder@gmail.com \
--cc=sudeep.holla@arm.com \
--cc=tglx@linutronix.de \
--cc=will@kernel.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).