layerscape: add ls1088ardb device support

LS1088A is an ARMv8 implementation combining eight ARM A53 processor
cores. The LS1088ARDB is an evaluatoin platform that supports the
LS1088A family SoCs.

Features summary:
- Eight 64-bit ARM v8 Cortex-A53 CPUs
- Data path acceleration architecture 2.0 (DPAA2)
- Ethernet interfaces
- QUADSPI flash, 3 PCIe, 2 USB, 1 SD, 2 DUARTs etc

Signed-off-by: Yutang Jiang <yutang.jiang@nxp.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-4.4/7185-staging-fsl-mc-fix-asymmetry-in-destroy-of-mc_io.patch b/target/linux/layerscape/patches-4.4/7185-staging-fsl-mc-fix-asymmetry-in-destroy-of-mc_io.patch
new file mode 100644
index 0000000000..b148c76068
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/7185-staging-fsl-mc-fix-asymmetry-in-destroy-of-mc_io.patch
@@ -0,0 +1,62 @@
+From 4e55a4c296d3a93c95320cdac0b8e72f3cfefb98 Mon Sep 17 00:00:00 2001
+From: Bharat Bhushan <Bharat.Bhushan@nxp.com>
+Date: Wed, 22 Jun 2016 16:40:48 -0500
+Subject: [PATCH 185/226] staging: fsl-mc: fix asymmetry in destroy of mc_io
+
+An mc_io represents a mapped MC portal.  Previously, an mc_io was
+created for the root dprc in fsl_mc_bus_probe() and for child dprcs
+in dprc_probe().  But the free of that data structure happened in the
+general bus remove callback.  This asymmetry resulted in some bugs due
+to unwanted destroys of mc_io object in some scenarios (e.g. vfio).
+
+Fix this bug by making things symmetric-- mc_io created in
+fsl_mc_bus_probe() is freed in fsl_mc_bus_remove().  The mc_io created
+in dprc_probe() is freed in dprc_remove().
+
+Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
+[Stuart: added check for root dprc and reworded commit message]
+Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/staging/fsl-mc/bus/dprc-driver.c |    5 +++++
+ drivers/staging/fsl-mc/bus/mc-bus.c      |    8 ++++----
+ 2 files changed, 9 insertions(+), 4 deletions(-)
+
+--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
++++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
+@@ -801,6 +801,11 @@ static int dprc_remove(struct fsl_mc_dev
+ 		dev_set_msi_domain(&mc_dev->dev, NULL);
+ 	}
+ 
++	if (!fsl_mc_is_root_dprc(&mc_dev->dev)) {
++		fsl_destroy_mc_io(mc_dev->mc_io);
++		mc_dev->mc_io = NULL;
++	}
++
+ 	dev_info(&mc_dev->dev, "DPRC device unbound from driver");
+ 	return 0;
+ }
+--- a/drivers/staging/fsl-mc/bus/mc-bus.c
++++ b/drivers/staging/fsl-mc/bus/mc-bus.c
+@@ -579,10 +579,6 @@ void fsl_mc_device_remove(struct fsl_mc_
+ 
+ 	if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) {
+ 		mc_bus = to_fsl_mc_bus(mc_dev);
+-		if (mc_dev->mc_io) {
+-			fsl_destroy_mc_io(mc_dev->mc_io);
+-			mc_dev->mc_io = NULL;
+-		}
+ 
+ 		if (fsl_mc_is_root_dprc(&mc_dev->dev)) {
+ 			if (atomic_read(&root_dprc_count) > 0)
+@@ -810,6 +806,10 @@ static int fsl_mc_bus_remove(struct plat
+ 		return -EINVAL;
+ 
+ 	fsl_mc_device_remove(mc->root_mc_bus_dev);
++
++	fsl_destroy_mc_io(mc->root_mc_bus_dev->mc_io);
++	mc->root_mc_bus_dev->mc_io = NULL;
++
+ 	dev_info(&pdev->dev, "Root MC bus device removed");
+ 	return 0;
+ }