From cddd4591404fb4c53dc0b3c0b15b942cdbed4356 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Fri, 10 Apr 2020 10:47:05 +0800
Subject: 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>
---
 ...-serial-fsl_lpuart-add-modem-device-reset.patch | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 target/linux/layerscape/patches-5.4/819-uart-0002-tty-serial-fsl_lpuart-add-modem-device-reset.patch

(limited to 'target/linux/layerscape/patches-5.4/819-uart-0002-tty-serial-fsl_lpuart-add-modem-device-reset.patch')

diff --git a/target/linux/layerscape/patches-5.4/819-uart-0002-tty-serial-fsl_lpuart-add-modem-device-reset.patch b/target/linux/layerscape/patches-5.4/819-uart-0002-tty-serial-fsl_lpuart-add-modem-device-reset.patch
new file mode 100644
index 0000000000..37fd23d205
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/819-uart-0002-tty-serial-fsl_lpuart-add-modem-device-reset.patch
@@ -0,0 +1,40 @@
+From 5b05462e88dc87d83566d04dd196b4f3d9dc0eef Mon Sep 17 00:00:00 2001
+From: Fugang Duan <fugang.duan@nxp.com>
+Date: Mon, 28 Jan 2019 10:12:52 +0800
+Subject: [PATCH] tty: serial: fsl_lpuart: add modem device reset
+
+Add modem device reset, wthether to reset depend on dts configuration.
+
+Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
+---
+ drivers/tty/serial/fsl_lpuart.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+--- a/drivers/tty/serial/fsl_lpuart.c
++++ b/drivers/tty/serial/fsl_lpuart.c
+@@ -22,6 +22,7 @@
+ #include <linux/of_dma.h>
+ #include <linux/pm_domain.h>
+ #include <linux/pm_runtime.h>
++#include <linux/reset.h>
+ #include <linux/serial_core.h>
+ #include <linux/slab.h>
+ #include <linux/tty_flip.h>
+@@ -1544,8 +1545,17 @@ static void lpuart32_configure(struct lp
+ static int lpuart32_startup(struct uart_port *port)
+ {
+ 	struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
++	struct tty_port *tty_port = &sport->port.state->port;
+ 	unsigned long flags;
+ 	unsigned long temp;
++	int ret;
++
++	/* some modem may need reset */
++	if (!tty_port_suspended(tty_port)) {
++		ret = device_reset(sport->port.dev);
++		if (ret && ret != -ENOENT)
++			return ret;
++	}
+ 
+ 	/* determine FIFO size */
+ 	temp = lpuart32_read(&sport->port, UARTFIFO);
-- 
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