diff options
Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 009e0dbc12d2..50d4082d2354 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -515,12 +515,14 @@ static void cdns_uart_start_tx(struct uart_port *port) if (uart_circ_empty(&port->state->xmit) || uart_tx_stopped(port)) return; - status = readl(port->membase + CDNS_UART_CR_OFFSET); - /* Set the TX enable bit and clear the TX disable bit to enable the + /* + * Set the TX enable bit and clear the TX disable bit to enable the * transmitter. */ - writel((status & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN, - port->membase + CDNS_UART_CR_OFFSET); + status = readl(port->membase + CDNS_UART_CR_OFFSET); + status &= ~CDNS_UART_CR_TX_DIS; + status |= CDNS_UART_CR_TX_EN; + writel(status, port->membase + CDNS_UART_CR_OFFSET); while (numbytes-- && ((readl(port->membase + CDNS_UART_SR_OFFSET) & CDNS_UART_SR_TXFULL)) != CDNS_UART_SR_TXFULL) { @@ -1123,8 +1125,9 @@ static void cdns_uart_console_write(struct console *co, const char *s, * clear the TX disable bit to enable the transmitter. */ ctrl = readl(port->membase + CDNS_UART_CR_OFFSET); - writel((ctrl & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN, - port->membase + CDNS_UART_CR_OFFSET); + ctrl &= ~CDNS_UART_CR_TX_DIS; + ctrl |= CDNS_UART_CR_TX_EN; + writel(ctrl, port->membase + CDNS_UART_CR_OFFSET); uart_console_write(port, s, count, cdns_uart_console_putchar); cdns_uart_console_wait_tx(port); |