tree 871be10d0b14cf2a48039647fbf39ca7609e49fd
parent 97a70b14395be0ca61b9fa56f8ff5f6313c26423
author Mark Salter <msalter@redhat.com> 1355326599 +0000
committer David Howells <dhowells@redhat.com> 1355327174 +0000

MN10300: fix debug polling in ttySM driver

The debug polling interface for the SoC serial ports did not work in the case
where the serial ports were not also used as a console. In that case, the
uart driver startup function will not be called so tx and rx would not be
enabled in the hardware control register. Also, vdma interrupts would not be
enabled which the poll_get_char function relied on. This patch makes sure that
the rx and tx enables are set as a consequence of the uart set_termios call
which is the only initialization done for the debug polling interface. Also,
the poll_get_char now handles the case where vdma interrupts are not enabled.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>