From: "Krzysztof Hałasa" <khalasa@piap.pl>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
linux-pci <linux-pci@vger.kernel.org>,
Arnd Bergmann <arnd@arndb.de>, Imre Kaloz <kaloz@openwrt.org>,
Zoltan HERPAI <wigyori@uid0.hu>,
Raylynn Knight <rayknight@me.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
"John W. Linville" <linville@redhat.com>
Subject: Re: [PATCH v6] PCI: ixp4xx: Add a new driver for IXP4xx
Date: Thu, 17 Jun 2021 12:45:24 +0200 [thread overview]
Message-ID: <m37dis7osb.fsf@t19.piap.pl> (raw)
In-Reply-To: <CACRpkdZJTnrRwaDk+FB2Pzsytz0My0C+SdxdYjTn5YENQP5UoQ@mail.gmail.com> (Linus Walleij's message of "Thu, 17 Jun 2021 11:42:04 +0200")
Linus Walleij <linus.walleij@linaro.org> writes:
> I have tried to find these users but it seems they do not exist.
> users need to set IXP4XX_INDIRECT_PCI to make use of it
> and the only existing userspace for IXP4XX is OpenWrt and
> they do not enable this.
Right. OpenWrt = mostly routers and they're less likely to use such
peripherals.
> Krzysztof Halasa talks about using it for a VGA card at one
> point:
Right. It was some 10(+?) years ago, and it was more an experiment
than a regular use.
> The plan is to locate these users (if I can) and in case they
> need this use an idea from Linville for indirect PCI access,
> if they can provide testing (I have nothing to test on
> unfortunately...) I can't find Linville's patch right now but Arnd
> pointed it out to me.
I guess I could theoretically test it (I mean I still have the hardware,
somewhere) - but I would be extremely surprized if anyone needs it.
IXP4xx can address max 256 MB of RAM. Max 667 MHz single ARMv5TE core
(most CPUs in the 266 - 533 MHz range). This isn't hardware for doing
graphics (and it never was).
Chris.
--
Krzysztof Hałasa
Sieć Badawcza Łukasiewicz
Przemysłowy Instytut Automatyki i Pomiarów PIAP
Al. Jerozolimskie 202, 02-486 Warszawa
prev parent reply other threads:[~2021-06-17 10:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-15 23:24 [PATCH v6] PCI: ixp4xx: Add a new driver for IXP4xx Linus Walleij
2021-06-16 13:10 ` Linus Walleij
2021-06-16 15:15 ` Bjorn Helgaas
2021-06-16 15:19 ` Bjorn Helgaas
2021-06-17 9:42 ` Linus Walleij
2021-06-17 10:45 ` Krzysztof Hałasa [this message]
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