03.09.2020 14:11, Andy Shevchenko пишет: > On Thu, Sep 3, 2020 at 3:53 AM Dmitry Osipenko <digetx@xxxxxxxxx> wrote: >> >> Use a single reset_control_reset() instead of assert/deasset couple in >> order to make code cleaner a tad. > >> Note that the reset_control_reset() >> uses 1 microsecond delay instead of 2 that was used previously, but this >> shouldn't matter. > > What datasheet says about this delay? The public datasheet doesn't say anything specific about the I2C controller reset time. IIUC, controller logic runs at 200/400 MHz, so 1us should be enough for the reset. I'm sure that somebody from NVIDIA should know the exact answer and will correct me if I'm wrong. I CC'd Peter De Schrijver who is a maintainer of the Tegra's clock-and-reset driver.
