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: Nava kishore Manne <navam@xxxxxxxxxx> --- Changes for v2: -Added New patch drivers/tty/serial/xilinx_uartps.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 527526e..b69dea3 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -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. -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
