Openwrt/target/linux/layerscape/patches-5.4/819-uart-0006-tty-serial-fsl_lpuart-enable-loopback-mode.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

30 lines
838 B
Diff

From 4dc6f2b9d454099445b8bc3a4a6328761335ce4d Mon Sep 17 00:00:00 2001
From: Fugang Duan <fugang.duan@nxp.com>
Date: Wed, 11 Sep 2019 16:23:25 +0800
Subject: [PATCH] tty: serial: fsl_lpuart: enable loopback mode
Enable lpuart32 loopback mode.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
---
drivers/tty/serial/fsl_lpuart.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1477,6 +1477,14 @@ static void lpuart32_set_mctrl(struct ua
temp |= UARTMODIR_TXCTSE;
lpuart32_write(port, temp, UARTMODIR);
+
+ temp = lpuart32_read(port, UARTCTRL);
+ if (mctrl & TIOCM_LOOP)
+ temp |= UARTCTRL_LOOPS;
+ else
+ temp &= ~UARTCTRL_LOOPS;
+
+ lpuart32_write(port, temp, UARTCTRL);
}
static void lpuart_break_ctl(struct uart_port *port, int break_state)