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Date:   Sat, 4 Jul 2020 08:03:59 +0200
From:   Wolfram Sang <>
To:     Chris Packham <>
        Mark Tomlinson <>,,
Subject: Re: [PATCH v2] i2c: algo-pca: Add 0x78 as SCL stuck low status

On Thu, Jul 02, 2020 at 10:39:11AM +1200, Chris Packham wrote:
> The PCA9665 datasheet says that I2CSTA = 78h indicates that SCL is stuck
> low, this differs to the PCA9564 which uses 90h for this indication.
> Treat either 0x78 or 0x90 as an indication that the SCL line is stuck.
> Based on looking through the PCA9564 and PCA9665 datasheets this should
> be safe for both chips. The PCA9564 should not return 0x78 for any valid
> state and the PCA9665 should not return 0x90.
> Signed-off-by: Chris Packham <>

Applied to for-current, thanks!

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