openwrt/target/linux/layerscape/patches-5.4/819-uart-0006-tty-serial-fsl_lpuart-enable-loopback-mode.patch
Yangbo Lu cddd459140 layerscape: add patches-5.4
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
2020-05-07 12:53:06 +02:00

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
@@ -1464,6 +1464,14 @@ 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)