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, 103 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-4.4/7150-staging-fsl-mc-set-MSI-domain-for-DPRC-objects.patch b/target/linux/layerscape/patches-4.4/7150-staging-fsl-mc-set-MSI-domain-for-DPRC-objects.patch
new file mode 100644
index 0000000000..0c69783ad9
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/7150-staging-fsl-mc-set-MSI-domain-for-DPRC-objects.patch
@@ -0,0 +1,103 @@
+From 15bfab2641c61fb50a876860e8909ab84d2b8701 Mon Sep 17 00:00:00 2001
+From: "J. German Rivera" <German.Rivera@freescale.com>
+Date: Wed, 6 Jan 2016 16:03:26 -0600
+Subject: [PATCH 150/226] staging: fsl-mc: set MSI domain for DPRC objects
+
+THE MSI domain associated with a root DPRC object is
+obtained form the device tree. Child DPRCs inherit
+the parent DPRC MSI domain.
+
+Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/staging/fsl-mc/bus/dprc-driver.c |   39 ++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
++++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
+@@ -13,6 +13,7 @@
+ #include "../include/mc-sys.h"
+ #include <linux/module.h>
+ #include <linux/slab.h>
++#include <linux/interrupt.h>
+ #include "dprc-cmd.h"
+ 
+ struct dprc_child_objs {
+@@ -398,11 +399,16 @@ static int dprc_probe(struct fsl_mc_devi
+ {
+ 	int error;
+ 	size_t region_size;
++	struct device *parent_dev = mc_dev->dev.parent;
+ 	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
++	bool msi_domain_set = false;
+ 
+ 	if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0))
+ 		return -EINVAL;
+ 
++	if (WARN_ON(dev_get_msi_domain(&mc_dev->dev)))
++		return -EINVAL;
++
+ 	if (!mc_dev->mc_io) {
+ 		/*
+ 		 * This is a child DPRC:
+@@ -421,6 +427,30 @@ static int dprc_probe(struct fsl_mc_devi
+ 					 &mc_dev->mc_io);
+ 		if (error < 0)
+ 			return error;
++		/*
++		 * Inherit parent MSI domain:
++		 */
++		dev_set_msi_domain(&mc_dev->dev,
++				   dev_get_msi_domain(parent_dev));
++		msi_domain_set = true;
++	} else {
++		/*
++		 * This is a root DPRC
++		 */
++		struct irq_domain *mc_msi_domain;
++
++		if (WARN_ON(parent_dev->bus == &fsl_mc_bus_type))
++			return -EINVAL;
++
++		error = fsl_mc_find_msi_domain(parent_dev,
++					       &mc_msi_domain);
++		if (error < 0) {
++			dev_warn(&mc_dev->dev,
++				 "WARNING: MC bus without interrupt support\n");
++		} else {
++			dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
++			msi_domain_set = true;
++		}
+ 	}
+ 
+ 	error = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
+@@ -446,6 +476,9 @@ error_cleanup_open:
+ 	(void)dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
+ 
+ error_cleanup_mc_io:
++	if (msi_domain_set)
++		dev_set_msi_domain(&mc_dev->dev, NULL);
++
+ 	fsl_destroy_mc_io(mc_dev->mc_io);
+ 	return error;
+ }
+@@ -463,6 +496,7 @@ error_cleanup_mc_io:
+ static int dprc_remove(struct fsl_mc_device *mc_dev)
+ {
+ 	int error;
++	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+ 
+ 	if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0))
+ 		return -EINVAL;
+@@ -475,6 +509,11 @@ static int dprc_remove(struct fsl_mc_dev
+ 	if (error < 0)
+ 		dev_err(&mc_dev->dev, "dprc_close() failed: %d\n", error);
+ 
++	if (dev_get_msi_domain(&mc_dev->dev)) {
++		fsl_mc_cleanup_irq_pool(mc_bus);
++		dev_set_msi_domain(&mc_dev->dev, NULL);
++	}
++
+ 	dev_info(&mc_dev->dev, "DPRC device unbound from driver");
+ 	return 0;
+ }