* Vignesh R <vigneshr@xxxxxx> [180417 09:21]: > On Monday 16 April 2018 09:15 PM, Tony Lindgren wrote: > > Also, I'm seeing an issue where the UARTs won't idle on init > > with 8250_omap driver if connected to the wl12xx bluetooth port > > unless I write some data to the port first. It does not seem > > to be related to the rts/cts lines being wired as I've tested > > muxing them out of the way. > > If this instance of UART is using DMA then it might be due an errata > worked around in AM33/AM43/DRA7: > https://patchwork.kernel.org/patch/6784331/ It sure sounds similar but UART_ERRATA_CLOCK_DISABLE does not seem to help with the reset. Also disabling DMA does not seem to help. So far the only way to clear it seems to be to write a character (TX) on the device. Then things work just fine even without UART_ERRATA_CLOCK_DISABLE set. I'll try to debug this more at some point. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
