On Sat, Jun 23, 2012 at 09:19:40PM +0200, Stefan Wahren wrote: > Hello, > > i'm using Linux 2.6.35 at ARM and i experience the following issue > with the mxs-auart (App UART). If i transmit and receive data over > the serial port (using mxs-auart), all the interrupt counter (RX, > TX, frame, parity, break) accessed from user space (ioctl with > TIOCGICOUNT or /proc/tty/driver/auart) are zero. > > Here is the scenario to reproduce the problem: > > 1. echoing some characters to the uart device > 2. fetch the statistics from proc-Filesystem > > Expected results: transmit counter greater than zero > > Observed results: transmit counter is always zero > > The same szenario on the mxs-duart (Debug UART) doesn't show this problem. > > Is this a bug in mxs-auart or just not implemented? We disabled the transmit counter from being displayed a while ago for security reasons, perhaps that is what you are seeing? Also, you do realize just how old 2.6.35 really is, right? thanks, greg k-h -- 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
