Messages in this thread | | | Date | Thu, 24 Nov 2022 14:24:10 +0100 | From | Neil Armstrong <> | Subject | Re: [PATCH v2 2/4] dt-bindings: pinctrl: qcom,tlmm-common: document i2c pull property |
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Hi Linus,
On 24/11/2022 14:11, Linus Walleij wrote: > On Wed, Nov 23, 2022 at 4:20 PM Abel Vesa <abel.vesa@linaro.org> wrote: > >> From: Neil Armstrong <neil.armstrong@linaro.org> >> >> Document the new i2c_pull property introduced for SM8550 setting >> an I2C specific pull mode on I2C able pins. >> >> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> >> Signed-off-by: Abel Vesa <abel.vesa@linaro.org> > (...) >> + qcom,i2c-pull: >> + type: boolean >> + description: enable bias pull feature designed for I2C on pin > > But what is this? > > I2C buses are usually just plain old bias-high-impedance, high-z > or open drain, wire-or or whatever you want to call it. > > But now there is some special i2c mode, huh? > > The description is pretty much "it is what it is"... can we have > some explanation about what this means electrically speaking > and why you cannot use bias-high-impedance?
I'll try to get some more info, but so far I only found what I wrote in the bindings.
Neil
> > Yours, > Linus Walleij
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