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Commit aea8f3dd authored by Soren Brinkmann's avatar Soren Brinkmann Committed by Greg Kroah-Hartman
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tty: xuartps: Clear interrupt status register in shutdown 



When shutting down the UART, clear the interrupt status register. Bits
in the ISR are cleared by writing them as '1'.

Signed-off-by: default avatarSoren Brinkmann <soren.brinkmann@xilinx.com>
Reviewed-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Reviewed-by: default avatarMoritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ea8dd8e5

drivers/tty/serial/xilinx_uartps.c

+1 −0
Original line number Diff line number Diff line
@@ -828,6 +828,7 @@ 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,