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- From 74d7e639cce7ae95cacd948dcf5ed3b28c3fff5c Mon Sep 17 00:00:00 2001
- From: Fugang Duan <[email protected]>
- 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 <[email protected]>
- ---
- 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
- @@ -931,7 +931,12 @@ 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;
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