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>

1 files changed, 38 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/802-can-0008-can-flexcan-flexcan_irq_state-only-read-timestamp-if.patch b/target/linux/layerscape/patches-5.4/802-can-0008-can-flexcan-flexcan_irq_state-only-read-timestamp-if.patch
new file mode 100644
index 0000000000..bc84f5f907
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/802-can-0008-can-flexcan-flexcan_irq_state-only-read-timestamp-if.patch
@@ -0,0 +1,38 @@
+From 1a92e5a9109963e2491eec111b84b35b4e2adc8f Mon Sep 17 00:00:00 2001
+From: Marc Kleine-Budde <mkl@pengutronix.de>
+Date: Wed, 9 Oct 2019 15:15:37 +0200
+Subject: [PATCH] can: flexcan: flexcan_irq_state(): only read timestamp if
+ needed
+
+The function flexcan_irq_state() checks the controller for CAN state
+changes and pushes a skb with the new state and a timestamp into the
+rx-offload framework.
+
+This patch optimizes the function by only reading the timestamp, if a
+state change is detected.
+
+Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
+---
+ drivers/net/can/flexcan.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/can/flexcan.c
++++ b/drivers/net/can/flexcan.c
+@@ -744,8 +744,6 @@ static void flexcan_irq_state(struct net
+ 	u32 timestamp;
+ 	int err;
+ 
+-	timestamp = priv->read(&regs->timer) << 16;
+-
+ 	flt = reg_esr & FLEXCAN_ESR_FLT_CONF_MASK;
+ 	if (likely(flt == FLEXCAN_ESR_FLT_CONF_ACTIVE)) {
+ 		tx_state = unlikely(reg_esr & FLEXCAN_ESR_TX_WRN) ?
+@@ -765,6 +763,8 @@ static void flexcan_irq_state(struct net
+ 	if (likely(new_state == priv->can.state))
+ 		return;
+ 
++	timestamp = priv->read(&regs->timer) << 16;
++
+ 	skb = alloc_can_err_skb(dev, &cf);
+ 	if (unlikely(!skb))
+ 		return;