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: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Chris Packham <chris.packham@alliedtelesis.co.nz>
Subject: [PATCH v3 0/4] P2040/P2041 i2c recovery erratum
Date: Wed, 12 May 2021 09:20:48 +1200 [thread overview]
Message-ID: <20210511212052.27242-1-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 (4):
dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c
controllers
powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c
controllers
i2c: mpc: implement erratum A-004447 workaround
.../devicetree/bindings/i2c/i2c-mpc.yaml | 7 ++
arch/powerpc/boot/dts/fsl/p1010si-post.dtsi | 8 ++
arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 16 ++++
drivers/i2c/busses/i2c-mpc.c | 81 ++++++++++++++++++-
4 files changed, 110 insertions(+), 2 deletions(-)
--
2.31.1
next reply other threads:[~2021-05-11 21:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 21:20 Chris Packham [this message]
2021-05-11 21:20 ` [PATCH v3 1/4] dt-bindings: i2c: mpc: Add fsl,i2c-erratum-a004447 flag Chris Packham
2021-05-11 21:20 ` [PATCH v3 2/4] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers Chris Packham
2021-05-26 1:02 ` Michael Ellerman
2021-05-11 21:20 ` [PATCH v3 3/4] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 " Chris Packham
2021-05-26 1:02 ` Michael Ellerman
2021-05-11 21:20 ` [PATCH v3 4/4] i2c: mpc: implement erratum A-004447 workaround Chris Packham
2021-05-11 22:10 ` [PATCH v3 0/4] P2040/P2041 i2c recovery erratum Joakim Tjernlund
2021-05-12 1:48 ` Chris Packham
2021-05-12 8:57 ` Joakim Tjernlund
2021-05-12 15:01 ` wsa
2021-05-20 3:36 ` Chris Packham
2021-05-25 18:49 ` wsa
2021-05-25 18:53 ` Wolfram Sang
2021-05-26 1:02 ` Michael Ellerman
2021-05-27 19:53 ` Wolfram Sang
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