diff options
| author | Jakub Kicinski <kubakici@wp.pl> | 2015-03-17 02:28:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-27 00:38:36 +0300 |
| commit | 9764e7a0f63bda5664cb985f992002c6eccef641 (patch) | |
| tree | da2435a68792611c216e2f8dfee9e255e292aa75 /drivers | |
| parent | 11b03ea0c1ef1cd2df3e7ea0437a13e2dfb65f60 (diff) | |
| download | linux-9764e7a0f63bda5664cb985f992002c6eccef641.tar.xz | |
sc16is7xx: don't wipe out port configuration on shutdown
EFCR register contains RS-485 configuration which should not
be changed by shutdown. Instead of doing a write only update
the appropriate bits.
Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Jon Ringle <jringle@gridpoint.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 11bb44039a57..e6b396e584f3 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -903,9 +903,11 @@ static void sc16is7xx_shutdown(struct uart_port *port) /* Disable all interrupts */ sc16is7xx_port_write(port, SC16IS7XX_IER_REG, 0); /* Disable TX/RX */ - sc16is7xx_port_write(port, SC16IS7XX_EFCR_REG, - SC16IS7XX_EFCR_RXDISABLE_BIT | - SC16IS7XX_EFCR_TXDISABLE_BIT); + sc16is7xx_port_update(port, SC16IS7XX_EFCR_REG, + SC16IS7XX_EFCR_RXDISABLE_BIT | + SC16IS7XX_EFCR_TXDISABLE_BIT, + SC16IS7XX_EFCR_RXDISABLE_BIT | + SC16IS7XX_EFCR_TXDISABLE_BIT); sc16is7xx_power(port, 0); } |