| Message ID | 20210507004047.4454-1-chris.packham@alliedtelesis.co.nz |
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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 v2 0/3] P2040/P2041 i2c recovery erratum
Date: Fri, 7 May 2021 12:40:44 +1200
Message-Id: <20210507004047.4454-1-chris.packham@alliedtelesis.co.nz>
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| Series | P2040/P2041 i2c recovery erratum | expand |
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(-)