On Wed, 2021-04-07 at 20:19 +0200, Wolfram Sang wrote: > > Due to clock stretch, our HW IP cannot meet the ac-timing > > spec(tSU;STA,tSU;STO). > > There isn't a same delay for clock stretching, so we need pass a > > parameter which can be found through measurement to meet most > > conditions. > > What about using this existing binding? > > - i2c-scl-internal-delay-ns > Number of nanoseconds the IP core additionally needs to setup SCL. > I can't see the relationship between "i2c-scl-falling-time-ns" and clock stretching, is there a parameter related to clock stretching? If you think both of them will affect the ac-timing of SCL, at this point, "i2c-scl-falling-time-ns" maybe a good choice.
