On Thu, Jun 19, 2014 at 11:38:20AM +0100, Daniel Thompson wrote:

Add a .poll_init() function that enables UART RX and registers the
UART's irq with KGDB. By providing this information to KGDB the serial
driver offers "permission" for KGDB to route the UART interrupt signal
from the drivers own handler to KGDBs FIQ handler (which will eventually
use the UART's polled I/O callbacks to interact with the user).

Note that the RX is not only enabled but also unmasked. This is required
because otherwise the FIQ handler could never trigger. This unmask is
copied from similar code in amba-pl011.c .

Signed-off-by: Daniel Thompson <redacted>
Cc: Srinivas Kandagatla <redacted>
Cc: Maxime Coquelin <redacted>
Cc: Patrice Chotard <redacted>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <redacted>
Cc: kernel@stlinux.com
Cc: linux-serial@vger.kernel.org
---

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>