From: soren.brinkmann@xilinx.com (Soren Brinkmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/9] tty: xuartps: Beautify read-modify writes
Date: Tue, 3 Nov 2015 16:20:42 -0800 [thread overview]
Message-ID: <1446596450-20918-2-git-send-email-soren.brinkmann@xilinx.com> (raw)
In-Reply-To: <1446596450-20918-1-git-send-email-soren.brinkmann@xilinx.com>
Non-functional, formatting changes to ease reading the code.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
drivers/tty/serial/xilinx_uartps.c | 15 +++++++++------
1 file 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);
--
2.6.2.3.ga463a5b
next prev parent reply other threads:[~2015-11-04 0:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 0:20 [PATCH 0/9] tty: xuartps: Fix lock ups Soren Brinkmann
2015-11-04 0:20 ` Soren Brinkmann [this message]
2015-11-04 0:20 ` [PATCH 2/9] tty: xuartps: Use spinlock to serialize HW access Soren Brinkmann
2015-11-04 0:52 ` kbuild test robot
2015-11-04 0:20 ` [PATCH 3/9] tty: xuartps: Always enable transmitter in start_tx Soren Brinkmann
2015-11-04 0:20 ` [PATCH 4/9] tty: xuartps: Clear interrupt status register in shutdown Soren Brinkmann
2015-11-04 0:20 ` [PATCH 5/9] tty: xuartps: Improve startup function Soren Brinkmann
2015-11-04 0:20 ` [PATCH 6/9] tty: xuartps: Keep lock for whole ISR Soren Brinkmann
2015-11-04 0:20 ` [PATCH 7/9] tty: xuartps: Acquire port lock for shutdown Soren Brinkmann
2015-11-04 0:20 ` [PATCH 8/9] tty: xuartps: Move RX path into helper function Soren Brinkmann
2015-11-04 0:20 ` [PATCH 9/9] tty: xuartps: Only handle RX IRQs when RX is enabled Soren Brinkmann
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