| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From 74d7e639cce7ae95cacd948dcf5ed3b28c3fff5c Mon Sep 17 00:00:00 2001 |
| 2 | From: Fugang Duan <fugang.duan@nxp.com> |
| 3 | Date: Mon, 28 Jan 2019 10:27:27 +0800 |
| 4 | Subject: [PATCH] tty: serial: fsl_lpuart: add magic SysRq support |
| 5 | |
| 6 | Add magic SysRq key support. |
| 7 | |
| 8 | Signed-off-by: Fugang Duan <fugang.duan@nxp.com> |
| 9 | --- |
| 10 | drivers/tty/serial/fsl_lpuart.c | 7 ++++++- |
| 11 | 1 file changed, 6 insertions(+), 1 deletion(-) |
| 12 | |
| 13 | --- a/drivers/tty/serial/fsl_lpuart.c |
| 14 | +++ b/drivers/tty/serial/fsl_lpuart.c |
| 15 | @@ -928,7 +928,12 @@ static void lpuart32_rxint(struct lpuart |
| 16 | */ |
| 17 | sr = lpuart32_read(&sport->port, UARTSTAT); |
| 18 | rx = lpuart32_read(&sport->port, UARTDATA); |
| 19 | - rx &= 0x3ff; |
| 20 | + |
| 21 | + if ((sr & UARTSTAT_FE) && (rx & UARTDATA_FRETSC) && |
| 22 | + !(rx & UARTDATA_MASK)) { |
| 23 | + if (uart_handle_break(&sport->port)) |
| 24 | + continue; |
| 25 | + } |
| 26 | |
| 27 | if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) |
| 28 | continue; |