ACPI support is added in the fsl-mc driver. Driver will parse
MC DSDT table to extract memory and other resorces.

Interrupt (GIC ITS) information will be extracted from MADT table
by drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c.

IORT table will be parsed to configure DMA.

Signed-off-by: Makarand Pawagi <redacted>
---
 drivers/acpi/arm64/iort.c                   | 53 +++++++++++++++++++++
 drivers/bus/fsl-mc/dprc-driver.c            |  3 +-
 drivers/bus/fsl-mc/fsl-mc-bus.c             | 48 +++++++++++++------
 drivers/bus/fsl-mc/fsl-mc-msi.c             | 10 +++-
 drivers/bus/fsl-mc/fsl-mc-private.h         |  4 +-
 drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 71 ++++++++++++++++++++++++++++-
 include/linux/acpi_iort.h                   |  5 ++
 7 files changed, 174 insertions(+), 20 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 33f7198..beb9cd5 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c

@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/pci.h>
+#include <linux/fsl/mc.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 

@@ -622,6 +623,29 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
 }
 
 /**
+ * iort_get_fsl_mc_device_domain() - Find MSI domain related to a device
+ * @dev: The device.
+ * @mc_icid: ICID for the fsl_mc device.
+ *
+ * Returns: the MSI domain for this device, NULL otherwise
+ */
+struct irq_domain *iort_get_fsl_mc_device_domain(struct device *dev,
+							u32 mc_icid)
+{
+	struct fwnode_handle *handle;
+	int its_id;
+
+	if (iort_dev_find_its_id(dev, mc_icid, 0, &its_id))
+		return NULL;
+
+	handle = iort_find_domain_token(its_id);
+	if (!handle)
+		return NULL;
+
+	return irq_find_matching_fwnode(handle, DOMAIN_BUS_FSL_MC_MSI);
+}