diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch b/target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch new file mode 100644 index 0000000000..043d246110 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch @@ -0,0 +1,28 @@ +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 +@@ -920,7 +920,12 @@ 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; |