Hi,
On Thu, Dec 4, 2014 at 11:03 AM, Wolfram Sang wrote:
>
>> > New binding should have the "-ns" suffix, right? So, I'd vote to add the
>> > suffix to the new bindings and deprecate the ones used in the designware
>> > driver: "i2c-scl-rising-time-ns" and "i2c-scl-falling-time-ns"
>> >
>> > It m
> > New binding should have the "-ns" suffix, right? So, I'd vote to add the
> > suffix to the new bindings and deprecate the ones used in the designware
> > driver: "i2c-scl-rising-time-ns" and "i2c-scl-falling-time-ns"
> >
> > It might be a little more work now, but it will help us in the future
Wolfram,
On Thu, Dec 4, 2014 at 10:40 AM, Wolfram Sang wrote:
>
>> If you don't read all the below, my belief is that we should simply
>> rename the strings in Addy's patch. We should change "rise-ns" to
>> "i2c-scl-rising-time" and "fall-ns" to "i2c-scl-falling-time".
>> Wolfram: can you confir
> If you don't read all the below, my belief is that we should simply
> rename the strings in Addy's patch. We should change "rise-ns" to
> "i2c-scl-rising-time" and "fall-ns" to "i2c-scl-falling-time".
> Wolfram: can you confirm this is OK? I'm voting to leave the "-ns"
> off the end of both to
Wolfram,
On Wed, Dec 3, 2014 at 3:15 AM, Wolfram Sang wrote:
>
>> + - rise-ns : Number of nanoseconds the signal takes to rise (t(r) in i2c
>> spec).
>> + If not specified this is assumed to be the max the spec allows
>> + (1000 ns for standard mode, 300 ns for fast mode) which
> + - rise-ns : Number of nanoseconds the signal takes to rise (t(r) in i2c
> spec).
> + If not specified this is assumed to be the max the spec allows
> + (1000 ns for standard mode, 300 ns for fast mode) which might
> + cause slightly slower communication.
> + - fall-
Addy,
On Tue, Dec 2, 2014 at 6:37 PM, Addy Ke wrote:
> high_ns calculated from the low division of CLKDIV register is the sum
> of actual measured high_ns and rise_ns. The rise time which related to
> external pull-up resistor can be up to the maximum rise time in I2C spec.
>
> In my test, if ext
high_ns calculated from the low division of CLKDIV register is the sum
of actual measured high_ns and rise_ns. The rise time which related to
external pull-up resistor can be up to the maximum rise time in I2C spec.
In my test, if external pull-up resistor is 4.7K, rise_ns is about
700ns. So the a
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