| From 74d7e639cce7ae95cacd948dcf5ed3b28c3fff5c Mon Sep 17 00:00:00 2001 |
| From: Fugang Duan <fugang.duan@nxp.com> |
| Date: Mon, 28 Jan 2019 10:27:27 +0800 |
| Subject: [PATCH] tty: serial: fsl_lpuart: add magic SysRq support |
| |
| Add magic SysRq key support. |
| |
| Signed-off-by: Fugang Duan <fugang.duan@nxp.com> |
| --- |
| drivers/tty/serial/fsl_lpuart.c | 7 ++++++- |
| 1 file changed, 6 insertions(+), 1 deletion(-) |
| |
| --- a/drivers/tty/serial/fsl_lpuart.c |
| +++ b/drivers/tty/serial/fsl_lpuart.c |
| @@ -928,7 +928,12 @@ static void lpuart32_rxint(struct lpuart |
| */ |
| sr = lpuart32_read(&sport->port, UARTSTAT); |
| rx = lpuart32_read(&sport->port, UARTDATA); |
| - rx &= 0x3ff; |
| + |
| + if ((sr & UARTSTAT_FE) && (rx & UARTDATA_FRETSC) && |
| + !(rx & UARTDATA_MASK)) { |
| + if (uart_handle_break(&sport->port)) |
| + continue; |
| + } |
| |
| if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) |
| continue; |