From: Chris Packham <chris.packham@alliedtelesis.co.nz>
To: wsa@kernel.org, andriy.shevchenko@linux.intel.com,
andy.shevchenko@gmail.com, robh+dt@kernel.org,
mpe@ellerman.id.au
Cc: devicetree@vger.kernel.org,
Chris Packham <chris.packham@alliedtelesis.co.nz>,
linuxppc-dev@lists.ozlabs.org, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/3] P2040/P2041 i2c recovery erratum
Date: Fri, 7 May 2021 12:40:44 +1200 [thread overview]
Message-ID: <20210507004047.4454-1-chris.packham@alliedtelesis.co.nz> (raw)
The P2040/P2041 has an erratum where the i2c recovery scheme
documented in the reference manual (and currently implemented
in the i2c-mpc.c driver) does not work. The errata document
provides an alternative that does work. This series implements
that alternative and uses a property in the devicetree to
decide when the alternative mechanism is needed.
Chris Packham (3):
dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c
controllers
i2c: mpc: implement erratum A-004447 workaround
.../devicetree/bindings/i2c/i2c-mpc.yaml | 7 ++
arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 16 ++++
drivers/i2c/busses/i2c-mpc.c | 84 ++++++++++++++++++-
3 files changed, 105 insertions(+), 2 deletions(-)
--
2.31.1
next reply other threads:[~2021-05-07 0:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 0:40 Chris Packham [this message]
2021-05-07 0:40 ` [PATCH v2 1/3] dt-bindings: i2c: mpc: Add fsl, i2c-erratum-a004447 flag Chris Packham
2021-05-07 21:49 ` [PATCH v2 1/3] dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag Rob Herring
2021-05-09 21:08 ` [PATCH v2 1/3] dt-bindings: i2c: mpc: Add fsl, i2c-erratum-a004447 flag Chris Packham
2021-05-11 15:33 ` Rob Herring
2021-05-07 0:40 ` [PATCH v2 2/3] powerpc/fsl: set fsl, i2c-erratum-a004447 flag for P2041 i2c controllers Chris Packham
2021-05-07 8:04 ` Joakim Tjernlund
2021-05-07 8:24 ` Joakim Tjernlund
2021-05-09 21:11 ` Chris Packham
2021-05-07 0:40 ` [PATCH v2 3/3] i2c: mpc: implement erratum A-004447 workaround Chris Packham
2021-05-07 11:46 ` Andy Shevchenko
2021-05-07 14:52 ` Joakim Tjernlund
2021-05-07 15:36 ` Andy Shevchenko
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