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serial: amba-pl011: remove redundant code in rs485_config

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In uart_set_rs485_config() the serial core already

- ensures that only one of both options RTS on send or RTS after send is
  set

- nullifies the padding field of the passed serial_rs485 struct

- clamps the RTS delays

- assigns the passed serial_rs485 struct to the uart port

So remove these tasks from the code of the drivers rs485_config() function
to avoid redundancy.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Link: https://lore.kernel.org/r/20220410104642.32195-3-LinoSanfilippo@gmx.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lino Sanfilippo 2022-04-10 12:46:35 +02:00 committed by Greg Kroah-Hartman
parent 0ed12afa56
commit a9efa45248
1 changed files with 1 additions and 15 deletions
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16
drivers/tty/serial/amba-pl011.c
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@ -2170,25 +2170,11 @@ static int pl011_rs485_config(struct uart_port *port,
struct uart_amba_port *uap =
container_of(port, struct uart_amba_port, port);
/* pick sane settings if the user hasn't */
if (!(rs485->flags & SER_RS485_RTS_ON_SEND) ==
!(rs485->flags & SER_RS485_RTS_AFTER_SEND)) {
rs485->flags |= SER_RS485_RTS_ON_SEND;
rs485->flags &= ~SER_RS485_RTS_AFTER_SEND;
}
/* clamp the delays to [0, 100ms] */
rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U);
rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U);
memset(rs485->padding, 0, sizeof(rs485->padding));
if (port->rs485.flags & SER_RS485_ENABLED)
pl011_rs485_tx_stop(uap);
/* Set new configuration */
port->rs485 = *rs485;
/* Make sure auto RTS is disabled */
if (port->rs485.flags & SER_RS485_ENABLED) {
if (rs485->flags & SER_RS485_ENABLED) {
u32 cr = pl011_read(uap, REG_CR);
cr &= ~UART011_CR_RTSEN;