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authorLinus Walleij <linus.walleij@linaro.org>2019-11-26 13:31:16 +0100
committerLinus Walleij <linus.walleij@linaro.org>2019-12-11 16:45:33 +0100
commit6b569bf4e3cccc666b0786063923f64fe49182cb (patch)
treeeb342add505f9f70a45c9e561a67e66f0b584da2 /Documentation/DMA-API.txt
parent20bb683b5089b3a7879a6bc9759ff12a75f1850e (diff)
ARM: dts: ux500: Drop pulls on I2C buses
The I2C block in the Ux500 uses internal pull-ups on the SoC, in fact it has to: in HS mode, the I2C block will need to autonomously take control over the pull-up line to do its job. This can be clearly seen from the SoC manual which states that the silicon has a line named "en_cspu_hs" which enables current source pull-up for high speed mode. Another hint is that the vendor code tree never enabled the pull up on these lines, despite being deployed on boards that lack external pull-up resistors. Tested on the Ux500 reference designs without any problems. Cc: Stephan Gerhold <stephan@gerhold.net> Reported-by: Stephan Gerhold <stephan@gerhold.net> Link: https://lore.kernel.org/r/20191126123116.56244-1-linus.walleij@linaro.org Reviewed-by: Stephan Gerhold <stephan@gerhold.net> Tested-by: Stephan Gerhold <stephan@gerhold.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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