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Commit 27b17ae0 authored by Nava kishore Manne's avatar Nava kishore Manne Committed by Greg Kroah-Hartman
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tty: serial: xuartps: Wait for rx and tx reset done status 



After issuing the reset, driver is not checking the rx and tx reset
done status. So, modified driver to wait for the reset done status.

Signed-off-by: default avatarNava kishore Manne <navam@xilinx.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3816b2f8

drivers/tty/serial/xilinx_uartps.c

+8 −0
Original line number Diff line number Diff line
@@ -694,6 +694,10 @@ static void cdns_uart_set_termios(struct uart_port *port, 
	ctrl_reg |= CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST;

	writel(ctrl_reg, port->membase + CDNS_UART_CR);



	while (readl(port->membase + CDNS_UART_CR) &

		(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST))

		cpu_relax();



	/*

	 * Clear the RX disable and TX disable bits and then set the TX enable

	 * bit and RX enable bit to enable the transmitter and receiver.
@@ -797,6 +801,10 @@ static int cdns_uart_startup(struct uart_port *port) 
	writel(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST,

			port->membase + CDNS_UART_CR);



	while (readl(port->membase + CDNS_UART_CR) &

		(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST))

		cpu_relax();



	/*

	 * Clear the RX disable bit and then set the RX enable bit to enable

	 * the receiver.