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Commit 9764e7a0 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by Greg Kroah-Hartman
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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: default avatarJakub Kicinski <kubakici@wp.pl>
Signed-off-by: default avatarJon Ringle <jringle@gridpoint.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 11b03ea0

drivers/tty/serial/sc16is7xx.c

+5 −3
Original line number Diff line number Diff line
@@ -903,7 +903,9 @@ 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_port_update(port, SC16IS7XX_EFCR_REG,

			      SC16IS7XX_EFCR_RXDISABLE_BIT |

			      SC16IS7XX_EFCR_TXDISABLE_BIT,

			      SC16IS7XX_EFCR_RXDISABLE_BIT |

			      SC16IS7XX_EFCR_TXDISABLE_BIT);