diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile
index 1017def..f4a7f46 100644
--- a/drivers/acpi/arm64/Makefile
+++ b/drivers/acpi/arm64/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_ACPI_IORT) 	+= iort.o
 obj-$(CONFIG_ACPI_GTDT) 	+= gtdt.o
+obj-$(CONFIG_INDIRECT_PIO)	+= acpi_indirectio.o
diff --git a/drivers/acpi/arm64/acpi_indirectio.c b/drivers/acpi/arm64/acpi_indirectio.c
new file mode 100644
index 0000000..51a1b92
--- /dev/null
+++ b/drivers/acpi/arm64/acpi_indirectio.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 HiSilicon Limited, All Rights Reserved.
+ * Author: Gabriele Paoloni <gabriele.paoloni@huawei.com>
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
+ * Author: John Garry <john.garry@huawei.com>
+ *
+ * This file implements functunality to scan the ACPI namespace and config
+ * devices under "indirect IO" hosts. An "indirect IO" host allows child
+ * devices to use logical IO accesses when the host, itself, does not provide
+ * a transparent bridge. The device setup creates a per-child MFD with a
+ * logical port IO resource.
+ */
+
+#include <linux/acpi.h>
+#include <linux/logic_pio.h>
+#include <linux/mfd/core.h>
+#include <linux/platform_device.h>
+
+ACPI_MODULE_NAME("indirect IO");
+
+#define ACPI_INDIRECT_IO_NAME_LEN 255
+
+struct acpi_indirect_io_mfd_cell {
+	struct mfd_cell_acpi_match acpi_match;
+	char name[ACPI_INDIRECT_IO_NAME_LEN];
+	char pnpid[ACPI_INDIRECT_IO_NAME_LEN];
+};
+
+static int acpi_indirect_io_xlat_res(struct acpi_device *adev,
+				     struct acpi_device *host,
+				     struct resource *res)
+{
+	unsigned long sys_port;
+	resource_size_t len = res->end - res->start;
+
+	sys_port = logic_pio_trans_hwaddr(&host->fwnode, res->start, len);
+	if (sys_port == -1UL)
+		return -EFAULT;
+
+	res->start = sys_port;
+	res->end = sys_port + len;
+
+	return 0;
+}
+
+/*
+ * acpi_indirect_io_set_res - set the resources for a child device
+ * (MFD) of an "indirect IO" host.
+ * @child: the device node to be updated the I/O resource
+ * @hostdev: the device node associated with the "indirect IO" host
+ * @res: double pointer to be set to the address of translated resources
+ * @num_res: pointer to variable to hold the number of translated resources
+ *
+ * Returns 0 when successful, and a negative value for failure.
+ *
+ * For a given "indirect IO" host, each child device will have associated
+ * host-relevative address resource. This function will return the translated
+ * logical PIO addresses for each child devices resources.
+ */
+static int acpi_indirect_io_set_res(struct device *child,
+				    struct device *hostdev,
+				    const struct resource **res,
+				    int *num_res)
+{
+	struct acpi_device *adev;
+	struct acpi_device *host;
+	struct resource_entry *rentry;
+	LIST_HEAD(resource_list);
+	struct resource *resources;
+	int count;
+	int i;
+	int ret = -EIO;
+
+	if (!child || !hostdev)
+		return -EINVAL;
+
+	host = to_acpi_device(hostdev);
+	adev = to_acpi_device(child);
+
+	/* check the device state */
+	if (!adev->status.present) {
+		dev_info(child, "device is not present\n");
+		return 0;
+	}
+	/* whether the child had been enumerated? */
+	if (acpi_device_enumerated(adev)) {
+		dev_info(child, "had been enumerated\n");
+		return 0;
+	}
+
+	count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
+	if (count <= 0) {
+		dev_err(child, "failed to get resources\n");
+		return count ? count : -EIO;
+	}
+
+	resources = kcalloc(count, sizeof(*resources), GFP_KERNEL);
+	if (!resources) {
+		acpi_dev_free_resource_list(&resource_list);
+		return -ENOMEM;
+	}
+	count = 0;
+	list_for_each_entry(rentry, &resource_list, node)
+		resources[count++] = *rentry->res;
+
+	acpi_dev_free_resource_list(&resource_list);
+
+	/* translate the I/O resources */
+	for (i = 0; i < count; i++) {
+		if (!(resources[i].flags & IORESOURCE_IO))
+			continue;
+		ret = acpi_indirect_io_xlat_res(adev, host, &resources[i]);
+		if (ret) {
+			kfree(resources);
+			dev_err(child, "translate IO range failed(%d)\n", ret);
+			return ret;
+		}
+	}
+	*res = resources;
+	*num_res = count;
+
+	return ret;
+}
+
+/*
+ * acpi_indirect_io_setup - scan handler for "indirect IO" host.
+ * @adev: "indirect IO" host ACPI device pointer
+ * Returns 0 when successful, and a negative value for failure.
+ *
+ * Setup an "indirect IO" host by scanning all child devices, and
+ * create a per-device MFD with logical PIO translated IO resources.
+ */
+static int acpi_indirect_io_setup(struct acpi_device *adev)
+{
+	struct platform_device *pdev;
+	struct mfd_cell *mfd_cells;
+	struct logic_pio_hwaddr *range;
+	struct acpi_device *child;
+	struct acpi_indirect_io_mfd_cell *acpi_indirect_io_mfd_cells;
+	int size, ret, count = 0, cell_num = 0;
+
+	range = kzalloc(sizeof(*range), GFP_KERNEL);
+	if (!range)
+		return -ENOMEM;
+	range->fwnode = &adev->fwnode;
+	range->flags = PIO_INDIRECT;
+	range->size = PIO_INDIRECT_SIZE;
+
+	ret = logic_pio_register_range(range);
+	if (ret)
+		goto free_range;
+
+	list_for_each_entry(child, &adev->children, node)
+		cell_num++;
+
+	/* allocate the mfd cell and companion acpi info, one per child */
+	size = sizeof(*mfd_cells) + sizeof(*acpi_indirect_io_mfd_cells);
+	mfd_cells = kcalloc(cell_num, size, GFP_KERNEL);
+	if (!mfd_cells) {
+		ret = -ENOMEM;
+		goto free_range;
+	}
+
+	acpi_indirect_io_mfd_cells = (struct acpi_indirect_io_mfd_cell *)
+					&mfd_cells[cell_num];
+	/* Only consider the children of the host */
+	list_for_each_entry(child, &adev->children, node) {
+		struct mfd_cell *mfd_cell = &mfd_cells[count];
+		struct acpi_indirect_io_mfd_cell *acpi_indirect_io_mfd_cell =
+					&acpi_indirect_io_mfd_cells[count];
+		const struct mfd_cell_acpi_match *acpi_match =
+					&acpi_indirect_io_mfd_cell->acpi_match;
+		char *name = &acpi_indirect_io_mfd_cell[count].name[0];
+		char *pnpid = &acpi_indirect_io_mfd_cell[count].pnpid[0];
+		struct mfd_cell_acpi_match match = {
+			.pnpid = pnpid,
+		};
+
+		snprintf(name, ACPI_INDIRECT_IO_NAME_LEN, "indirect-io-%s",
+			 acpi_device_hid(child));
+		snprintf(pnpid, ACPI_INDIRECT_IO_NAME_LEN, "%s",
+			 acpi_device_hid(child));
+
+		memcpy((void *)acpi_match, (void *)&match, sizeof(*acpi_match));
+		mfd_cell->name = name;
+		mfd_cell->acpi_match = acpi_match;
+
+		ret = acpi_indirect_io_set_res(&child->dev, &adev->dev,
+					       &mfd_cell->resources,
+					       &mfd_cell->num_resources);
+		if (ret) {
+			dev_err(&child->dev, "set resource failed (%d)\n", ret);
+			goto free_mfd_resources;
+		}
+		count++;
+	}
+
+	pdev = acpi_create_platform_device(adev, NULL);
+	if (IS_ERR_OR_NULL(pdev)) {
+		dev_err(&adev->dev, "create platform device for host failed\n");
+		ret = PTR_ERR(pdev);
+		goto free_mfd_resources;
+	}
+	acpi_device_set_enumerated(adev);
+
+	ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
+			      mfd_cells, cell_num, NULL, 0, NULL);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add mfd cells (%d)\n", ret);
+		goto free_mfd_resources;
+	}
+
+	return ret;
+
+free_mfd_resources:
+	while (cell_num--)
+		kfree(mfd_cells[cell_num].resources);
+	kfree(mfd_cells);
+free_range:
+	kfree(range);
+
+	return ret;
+}
+
+/* All the host devices which apply indirect-IO can be listed here. */
+static const struct acpi_device_id acpi_indirect_io_host_id[] = {
+	{}
+};
+
+static int acpi_indirect_io_attach(struct acpi_device *adev,
+				   const struct acpi_device_id *id)
+{
+	int ret = acpi_indirect_io_setup(adev);
+
+	if (ret < 0)
+		return ret;
+
+	return 1;
+}
+
+static struct acpi_scan_handler acpi_indirect_io_handler = {
+	.ids = acpi_indirect_io_host_id,
+	.attach = acpi_indirect_io_attach,
+};
+
+void __init acpi_indirect_io_scan_init(void)
+{
+	acpi_scan_add_handler(&acpi_indirect_io_handler);
+}
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 1d0a501..680f3cf 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -31,6 +31,11 @@
 void acpi_platform_init(void);
 void acpi_pnp_init(void);
 void acpi_int340x_thermal_init(void);
+#ifdef CONFIG_INDIRECT_PIO
+void acpi_indirect_io_scan_init(void);
+#else
+static inline void acpi_indirect_io_scan_init(void) {}
+#endif
 #ifdef CONFIG_ARM_AMBA
 void acpi_amba_init(void);
 #else
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 8e63d93..204da8a 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2155,6 +2155,7 @@ int __init acpi_scan_init(void)
 	acpi_amba_init();
 	acpi_watchdog_init();
 	acpi_init_lpit();
+	acpi_indirect_io_scan_init();
 
 	acpi_scan_add_handler(&generic_device_handler);
 
