5541a9bacf
Although there is already sysrq characters handling, a break condition was never detected. Add support for it. The LPUART can't distinguish between a framing error and a break condition. We assume it is a break if the received data is all zero. Signed-off-by: Michael Walle <michael@walle.cc> Link: https://lore.kernel.org/r/20210512141255.18277-6-michael@walle.cc Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>