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, 63 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/809-jailhouse-0018-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch b/target/linux/layerscape/patches-5.4/809-jailhouse-0018-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch
new file mode 100644
index 0000000000..cb3ffcc323
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/809-jailhouse-0018-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch
@@ -0,0 +1,63 @@
+From 5192fa99f0d267eb7bd1c79e556430ea8911ae38 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Sun, 4 Mar 2018 13:50:24 +0100
+Subject: [PATCH] ivshmem-net: Refactor and comment ivshm_net_state_change
+
+This should make the state transitioning logic clearer. Also avoid the
+harmless but redundant netif_carrier_on/ivshm_net_run in RUN state.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+(cherry picked from commit 8539efe70fbdf4a0bea75a97c1628fbb38b6590b)
+---
+ drivers/net/ivshmem-net.c | 23 ++++++++++++++++++++---
+ 1 file changed, 20 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/ivshmem-net.c
++++ b/drivers/net/ivshmem-net.c
+@@ -575,14 +575,21 @@ static void ivshm_net_state_change(struc
+ 	struct net_device *ndev = in->napi.dev;
+ 	u32 rstate = readl(&in->ivshm_regs->rstate);
+ 
+-
+ 	switch (in->lstate) {
+ 	case IVSHM_NET_STATE_RESET:
++		/*
++		 * Wait for the remote to leave READY/RUN before transitioning
++		 * to INIT.
++		 */
+ 		if (rstate < IVSHM_NET_STATE_READY)
+ 			ivshm_net_set_state(in, IVSHM_NET_STATE_INIT);
+ 		break;
+ 
+ 	case IVSHM_NET_STATE_INIT:
++		/*
++		 * Wait for the remote to leave RESET before performing the
++		 * initialization and moving to READY.
++		 */
+ 		if (rstate > IVSHM_NET_STATE_RESET) {
+ 			ivshm_net_init_queues(ndev);
+ 			ivshm_net_set_state(in, IVSHM_NET_STATE_READY);
+@@ -594,11 +601,21 @@ static void ivshm_net_state_change(struc
+ 		break;
+ 
+ 	case IVSHM_NET_STATE_READY:
+-	case IVSHM_NET_STATE_RUN:
++		/*
++		 * Link is up and we are running once the remote is in READY or
++		 * RUN.
++		 */
+ 		if (rstate >= IVSHM_NET_STATE_READY) {
+ 			netif_carrier_on(ndev);
+ 			ivshm_net_run(ndev);
+-		} else if (rstate == IVSHM_NET_STATE_RESET) {
++			break;
++		}
++		/* fall through */
++	case IVSHM_NET_STATE_RUN:
++		/*
++		 * If the remote goes to RESET, we need to follow immediately.
++		 */
++		if (rstate == IVSHM_NET_STATE_RESET) {
+ 			netif_carrier_off(ndev);
+ 			ivshm_net_do_stop(ndev);
+ 		}