>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; Yes, I can't believe that, Maybe caused by the hardware environment or any other well. Additionally I have't probe this issue recently.
