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serial: xilinx_uartps: unset STOPBRK when setting STARTBRK

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Zynq UG585 states, in chapter B.33, for XUARTPS_CR_STARTBRK:
It can only be set if STPBRK (Stop transmitter break) is not high

This fixes tcsendbreak, which otherwise does not actually break.

Signed-Off-By: Julien Malik <julien.malik@unseenlabs.fr>
Link: https://lore.kernel.org/r/20230624210323.88455-1-julien.malik@unseenlabs.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Julien Malik 2023-06-24 23:03:23 +02:00 committed by Greg Kroah-Hartman
parent cee8e0cc93
commit 1ed59c5e17
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/xilinx_uartps.c
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@ -657,7 +657,7 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl)
status = readl(port->membase + CDNS_UART_CR);
if (ctl == -1)
writel(CDNS_UART_CR_STARTBRK | status,
writel(CDNS_UART_CR_STARTBRK | (~CDNS_UART_CR_STOPBRK & status),
port->membase + CDNS_UART_CR);
else {
if ((status & CDNS_UART_CR_STOPBRK) == 0)