tree 5a73a17f99e11932ffcde80217ee98d7d6648330
parent 7b9c5162c1829686baea1962177842c3fa1ea81c
author Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 1438013373 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1438751240 -0700

serial: mpc52xx: let tx_empty callback return either 0 or TIOCSER_TEMT

Documenation/serial/driver requests that the tx_empty callback should
return 0 if there are still chars in the fifo or shifter or TIOCSER_TEMT
(0x01) if no character is pending to be sent.

Fix the mpc52xx serial driver to not return MPC52xx_PSC_SR_TXEMP (i.e.
0x0800) but TIOCSER_TEMT as documented.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>