1
0
mirror of https://git.openwrt.org/openwrt/openwrt.git synced 2024-10-19 22:18:16 +02:00
openwrt/target/linux/layerscape/patches-5.4/819-uart-0003-tty-serial-fsl_lpuart-add-magic-SysRq-support.patch
John Audia 667f6c7f49 kernel: bump 5.4 to 5.4.77
Manually rebased patches:
 bcm27xx/patches-5.4/950-0135-spi-spi-bcm2835-Disable-forced-software-CS.patch
 generic-backport/744-v5.5-net-sfp-soft-status-and-control-support.patch
 layerscape/patches-5.4/819-uart-0005-tty-serial-fsl_lpuart-enable-dma-mode-for-imx8qxp.patch
 mvebu/patches-5.4/521-arm64-dts-marvell-espressobin-Add-ethernet-switch-al.patch

Removed:
 layerscape/patches-5.4/819-uart-0012-tty-serial-lpuart-add-LS1028A-support.patch

All modifications made by update_kernel.sh

Build system: x86_64
Build-tested: ipq806x/R7800, ath79/generic, bcm27xx/bcm2711,
              lantiq/Easybox 904 xDSL, x86_64
Run-tested: ipq806x/R7800, lantiq/Easybox 904 xDSL, x86_64

No dmesg regressions, everything functional

Signed-off-by: John Audia <graysky@archlinux.us>
Co-developed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-11-18 21:13:46 +01:00

29 lines
875 B
Diff

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
@@ -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;