From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: linux-aspeed@lists.ozlabs.org
Cc: devicetree@vger.kernel.org,
OpenBMC Maillist <openbmc@lists.ozlabs.org>,
Andrew Jeffery <andrew@aj.id.au>, Joel Stanley <joel@jms.id.au>,
Rob Herring <robh@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/5] fsi: Coldfire coprocessor offload
Date: Thu, 12 Jul 2018 13:48:42 +1000 [thread overview]
Message-ID: <20180712034847.12878-1-benh@kernel.crashing.org> (raw)
This series implements support for offloading the FSI protocol bitbanging
to the ColdFire secondary core of the Aspeed SoCs. The result increases
FSI performance by a factor of 4, and on systems that don't support async
FSI clock, provide much more regular and continuous clocking which helps
reliability.
This series is much smaller than the previous submissions as I already
merged all the "preparatory" work into the FSI tree. This is now strictly
the coldfire support and is now only waiting for ack of the DT bindings
(and whatever other review comments might come my way) before I put it
into the FSI tree and sends it to Greg.
There are two dependencies to be able to build/use this. The above
prep work:
https://git.kernel.org/pub/scm/linux/kernel/git/benh/linux-fsi.git/log/
And the Aspeed GPIO driver changes for handling with GPIO lines ownership and
handshaking. The patches have been merged into the GPIO tree and a dedicated
immutable topic branch and can be found here:
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git/log/?h=ib-aspeed
Finally, the driver needs a machine specific firmware file. The firwmare
is open source and available at:
https://github.com/ozbenh/cf-fsi
I will submit it to linux-firmware if there's enough popular demand ;-)
v2. Fix misuse of devm_kzalloc for objects containing a struct device
in fsi-master-gpio and fsi-master-ast-cf (similar fixes for the
various FSI drivers will come later a part of rework to move away
from misc devs).
v3. Sparse fix and updated DT bindings as per Rob's comments.
next reply other threads:[~2018-07-12 3:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-12 3:48 Benjamin Herrenschmidt [this message]
2018-07-12 3:48 ` [PATCH v3 1/5] dt-bindings: fsi: Document binding for the fsi-master-ast-cf "device" Benjamin Herrenschmidt
2018-07-16 15:33 ` Rob Herring
2018-07-17 4:12 ` Benjamin Herrenschmidt
2018-07-12 3:48 ` [PATCH v3 2/5] devres: Add devm_of_iomap() Benjamin Herrenschmidt
2018-07-12 3:48 ` [PATCH v3 3/5] fsi: master-ast-cf: Add new FSI master using Aspeed ColdFire Benjamin Herrenschmidt
2018-07-12 7:53 ` Joel Stanley
2018-07-12 11:45 ` Benjamin Herrenschmidt
2018-07-12 3:48 ` [PATCH v3 4/5] arm: dts: OpenPower Romulus system can use coprocessor for FSI Benjamin Herrenschmidt
2018-07-12 3:48 ` [PATCH v3 5/5] arm: dts: OpenPower Palmetto " Benjamin Herrenschmidt
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