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serial: xilinx_uartps: unset STOPBRK when setting STARTBRK
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>
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@ -657,7 +657,7 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl)
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status = readl(port->membase + CDNS_UART_CR);
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if (ctl == -1)
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writel(CDNS_UART_CR_STARTBRK | status,
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writel(CDNS_UART_CR_STARTBRK | (~CDNS_UART_CR_STOPBRK & status),
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port->membase + CDNS_UART_CR);
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else {
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if ((status & CDNS_UART_CR_STOPBRK) == 0)
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