On 20 March 2018 at 01:36, Trent Piepho <tpie...@impinj.com> wrote: > Linux does not detect a break from this IMX serial driver as a magic > sysrq. Nor does it note a break in the port error counts. > > The former is because the Linux driver uses the BRCD bit in the USR2 > register to trigger the RS-232 break handler in the kernel, which is > where sysrq hooks in. The emulated UART was not setting this status > bit. > > The latter is because the Linux driver expects, in addition to the BRK > bit, that the ERR bit is set when a break is read in the FIFO. A break > should also count as a frame error, so add that bit too. > > Cc: Andrey Smirnov <andrew.smir...@gmail.com> > Signed-off-by: Trent Piepho <tpie...@impinj.com>
Yep, the data sheet is nice and clear here about the requirements. Applied to target-arm.next, thanks. -- PMM
