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, 61 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch b/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch
new file mode 100644
index 0000000000..96897b5e2a
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0404-LF-457-ocelot-tsn-clean-preempt-interrupt-status.patch
@@ -0,0 +1,61 @@
+From 5d246e343440ee4915109dac66543d02d71ca900 Mon Sep 17 00:00:00 2001
+From: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
+Date: Tue, 11 Feb 2020 15:33:46 +0800
+Subject: [PATCH] LF-457: ocelot: tsn: clean preempt interrupt status
+
+The INTB interrupt is used both for 1588 interrupt and preemption status
+change interrupt on each port. So clean preempt status interrupt in IRQ
+handle function. Without handling it, driver may get interrupt storm.
+
+Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
+Reviewed-by: Po Liu <Po.Liu@nxp.com>
+---
+ drivers/net/dsa/ocelot/felix.c         |  5 +----
+ drivers/net/ethernet/mscc/ocelot_tsn.c | 14 ++++++++++++++
+ include/soc/mscc/ocelot.h              |  1 +
+ 3 files changed, 16 insertions(+), 4 deletions(-)
+
+--- a/drivers/net/dsa/ocelot/felix.c
++++ b/drivers/net/dsa/ocelot/felix.c
+@@ -688,12 +688,9 @@ static irqreturn_t felix_irq_handler(int
+ 
+ 	/* The INTB interrupt is used for both PTP TX timestamp interrupt
+ 	 * and preemption status change interrupt on each port.
+-	 *
+-	 * - Get txtstamp if have
+-	 * - TODO: handle preemption. Without handling it, driver may get
+-	 *   interrupt storm.
+ 	 */
+ 
++	ocelot_preempt_irq_clean(ocelot);
+ 	ocelot_get_txtstamp(ocelot);
+ 
+ 	return IRQ_HANDLED;
+--- a/drivers/net/ethernet/mscc/ocelot_tsn.c
++++ b/drivers/net/ethernet/mscc/ocelot_tsn.c
+@@ -1570,3 +1570,17 @@ int ocelot_dscp_set(struct ocelot *ocelo
+ 
+ 	return 0;
+ }
++
++void ocelot_preempt_irq_clean(struct ocelot *ocelot)
++{
++	struct ocelot_port *ocelot_port;
++	int port;
++	u32 val;
++
++	val = DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_ACTIVE_STICKY;
++	for (port = 0; port < ocelot->num_phys_ports; port++) {
++		ocelot_port = ocelot->ports[port];
++		ocelot_port_rmwl(ocelot_port, val, val,
++				 DEV_GMII_MM_STATISTICS_MM_STATUS);
++	}
++}
+--- a/include/soc/mscc/ocelot.h
++++ b/include/soc/mscc/ocelot.h
+@@ -592,4 +592,5 @@ int ocelot_rtag_parse_enable(struct ocel
+ int ocelot_dscp_set(struct ocelot *ocelot, int port,
+ 		    bool enable, const u8 dscp_ix,
+ 		    struct tsn_qos_switch_dscp_conf *c);
++void ocelot_preempt_irq_clean(struct ocelot *ocelot);
+ #endif