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MLK-22971 serial: imx: disable UCR4_OREN in .stop_rx() 

Disable UCR4_OREN bit in .stop_rx() to avoid endless
interrupt happen while tty port is shuting down.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Fugang Duan 2019-11-13 17:56:26 +08:00 committed by Dong Aisheng
parent 7e33590f8b
commit 11a8351e80
1 changed files with 4 additions and 1 deletions
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5
drivers/tty/serial/imx.c
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@ -469,18 +469,21 @@ static void imx_uart_stop_tx(struct uart_port *port)
static void imx_uart_stop_rx(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
u32 ucr1, ucr2;
u32 ucr1, ucr2, ucr4;
ucr1 = imx_uart_readl(sport, UCR1);
ucr2 = imx_uart_readl(sport, UCR2);
ucr4 = imx_uart_readl(sport, UCR4);
if (sport->dma_is_enabled) {
ucr1 &= ~(UCR1_RXDMAEN | UCR1_ATDMAEN);
} else {
ucr1 &= ~UCR1_RRDYEN;
ucr2 &= ~UCR2_ATEN;
ucr4 &= ~UCR4_OREN;
}
imx_uart_writel(sport, ucr1, UCR1);
imx_uart_writel(sport, ucr4, UCR4);
ucr2 &= ~UCR2_RXEN;
imx_uart_writel(sport, ucr2, UCR2);