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author | Linus Walleij <linus.walleij@linaro.org> | 2019-11-26 13:31:16 +0100 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2019-12-11 16:45:33 +0100 |
commit | 6b569bf4e3cccc666b0786063923f64fe49182cb (patch) | |
tree | eb342add505f9f70a45c9e561a67e66f0b584da2 /Documentation/DMA-API.txt | |
parent | 20bb683b5089b3a7879a6bc9759ff12a75f1850e (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>
Diffstat (limited to 'Documentation/DMA-API.txt')
0 files changed, 0 insertions, 0 deletions