Hi Shikai, On Tue, Nov 5, 2019 at 2:18 PM sxauwsk@xxxxxxx <sxauwsk@xxxxxxx> wrote: > > >Hi Shikai, > > > >On Tue, Feb 19, 2019 at 8:19 AM Shikai Wang <sxauwsk@xxxxxxx> wrote: > >> > >> When the adapter receive arbitration lost error interrupts, > >> cdns_i2c_master_xfer return to the caller directly instead of resetting > >> the adapter which resulted in the adapter being out of control. > >> > >> So when driver detect err_status such as arbitration lost, > >> then try to repair and fix it. > >> > >I am missing the issue that you are facing. > >You are having a multimaster scenario and getting arbitration lost. > > > >the current code would attempt a retry did that lead to any issues? > > > >Can you explain the issue that you are facing? > > Of cource, The following describe my situation. > > In my product, Touchscreen connect to zynq-7000 XC7Z010 by i2c bus( Just connect only one i2c-device of touchscreen), > when user tap Touchscreen, Touchscreen interrupt send to CPU and notifyed i2c-driver to obtain location data by i2c-bus, So it is single master single slave. > > when Tap the screen frequently, sometimes CPU get interrupt from touchscreen and try to obtain data, then detect arbitration lost, the arbitration lost is surprising in non-multimaster scenario. Is there any other master in the configuration that we may not be triggering. Or can you probe the lines? > Although i2c-driver try three times, it's useless. You get bus busy? what is the issue. > > Actually i2c clock-line and data-line keep high, that mean i2c bus free. > Once this situation occur, i2c-control did't work anynay but cpu receive interrputs still. > > I am sorry that I have't found a good solution for this issuse;
