[PATH RESEND v2 04/10] tty: xuartps: Clear interrupt status register in shutdown

From	Soren Brinkmann <soren.brinkmann@xilinx.com>
Newsgroups	linux.kernel
Subject	[PATH RESEND v2 04/10] tty: xuartps: Clear interrupt status register in shutdown
Date	2015-11-19 21:10 +0100
Message-ID	<qwDGO-5Ex-25@gated-at.bofh.it> (permalink)
References	<qwDGO-5Ex-27@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

When shutting down the UART, clear the interrupt status register.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
 drivers/tty/serial/xilinx_uartps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index df6778d17949..b7fc30639292 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -825,6 +825,7 @@ static void cdns_uart_shutdown(struct uart_port *port)
 	/* Disable interrupts */
 	status = readl(port->membase + CDNS_UART_IMR_OFFSET);
 	writel(status, port->membase + CDNS_UART_IDR_OFFSET);
+	writel(0xffffffff, port->membase + CDNS_UART_ISR_OFFSET);
 
 	/* Disable the TX and RX */
 	writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS,
-- 
2.6.3.3.g9bb996a

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATH RESEND v2 04/10] tty: xuartps: Clear interrupt status register in shutdown Soren Brinkmann <soren.brinkmann@xilinx.com> - 2015-11-19 21:10 +0100

csiph-web