diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index f131ba9..0e5e339 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -60,6 +60,12 @@ config PCI_HOST_GENERIC
 	  Say Y here if you want to support a simple generic PCI host
 	  controller, such as the one emulated by kvmtool.
 
+config PCI_HOST_GENERIC_ACPI
+	bool "Generic ACPI PCI host controller"
+	depends on ACPI && ARCH_PCI_HOST_GENERIC_ACPI
+	help
+	  Say Y here if you want to support generic ACPI PCI host controller.
+
 config PCIE_SPEAR13XX
 	bool "STMicroelectronics SPEAr PCIe controller"
 	depends on ARCH_SPEAR13XX
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 9d4d3c6..9117894 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o
 obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o
 obj-$(CONFIG_PCI_RCAR_GEN2_PCIE) += pcie-rcar.o
 obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
+obj-$(CONFIG_PCI_HOST_GENERIC_ACPI) += pci-host-acpi.o
 obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spear13xx.o
 obj-$(CONFIG_PCI_KEYSTONE) += pci-keystone-dw.o pci-keystone.o
 obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
diff --git a/drivers/pci/host/pci-host-acpi.c b/drivers/pci/host/pci-host-acpi.c
new file mode 100644
index 0000000..29175f5
--- /dev/null
+++ b/drivers/pci/host/pci-host-acpi.c
@@ -0,0 +1,138 @@
+/*
+ * ACPI based generic PCI host controller driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (C) 2015 Semihalf
+ * Author: Tomasz Nowicki <tn@semihalf.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/ecam.h>
+#include <linux/of_address.h>
+#include <linux/pci.h>
+#include <linux/pci-acpi.h>
+
+static int pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	if (pci_dev_msi_enabled(dev))
+		return 0;
+
+	return acpi_pci_irq_enable(dev);
+}
+
+int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
+{
+	bridge->map_irq = pcibios_map_irq;
+	return 0;
+}
+
+static void pci_mcfg_release_info(struct acpi_pci_root_info *ci)
+{
+	pci_mmcfg_teardown_map(ci);
+	kfree(ci);
+}
+
+static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
+{
+	struct resource_entry *entry, *tmp;
+	int ret;
+
+	ret = acpi_pci_probe_root_resources(ci);
+	if (ret <= 0)
+		return ret;
+
+	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
+		struct resource *res = entry->res;
+
+		/*
+		 * TODO: need to move pci_register_io_range() function out
+		 * of drivers/of/address.c for both used by DT and ACPI
+		 */
+		if (res->flags & IORESOURCE_IO) {
+			resource_size_t cpu_addr = res->start + entry->offset;
+			resource_size_t pci_addr = res->start;
+			resource_size_t length = res->end - res->start;
+			unsigned long port;
+			int err;
+
+			err = pci_register_io_range(cpu_addr, length);
+			if (err) {
+				resource_list_destroy_entry(entry);
+				continue;
+			}
+
+			port = pci_address_to_pio(cpu_addr);
+			if (port == (unsigned long)-1) {
+				resource_list_destroy_entry(entry);
+				continue;
+			}
+
+			res->start = port;
+			res->end = port + length;
+			entry->offset = port - pci_addr;
+
+			if (pci_remap_iospace(res, cpu_addr) < 0)
+				resource_list_destroy_entry(entry);
+		}
+	}
+
+	return ret;
+}
+
+static struct acpi_pci_root_ops acpi_pci_root_ops = {
+	.init_info = pci_mmcfg_setup_map,
+	.release_info = pci_mcfg_release_info,
+	.prepare_resources = pci_acpi_root_prepare_resources,
+};
+
+/* Root bridge scanning */
+struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
+{
+	int node = acpi_get_node(root->device->handle);
+	int domain = root->segment;
+	int busnum = root->secondary.start;
+	struct acpi_pci_root_info *info;
+	struct pci_bus *bus;
+
+	if (domain && !pci_domains_supported) {
+		pr_warn("PCI %04x:%02x: multiple domains not supported.\n",
+			domain, busnum);
+		return NULL;
+	}
+
+	info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
+	if (!info) {
+		dev_err(&root->device->dev,
+			"pci_bus %04x:%02x: ignored (out of memory)\n",
+			domain, busnum);
+		return NULL;
+	}
+
+	acpi_pci_root_ops.pci_ops = pci_mcfg_get_ops(domain, busnum);
+	bus = acpi_pci_root_create(root, &acpi_pci_root_ops, info, root);
+
+	/* After the PCI-E bus has been walked and all devices discovered,
+	 * configure any settings of the fabric that might be necessary.
+	 */
+	if (bus) {
+		struct pci_bus *child;
+		pci_bus_size_bridges(bus);
+		pci_bus_assign_resources(bus);
+
+		list_for_each_entry(child, &bus->children, node)
+			pcie_bus_configure_settings(child);
+	}
+
+	return bus;
+}
