diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
new file mode 100644
index 0000000..187e4a1
--- /dev/null
+++ b/drivers/pnp/interface.c
@@ -0,0 +1,469 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * interface.c - contains everything related to the user interface
+ *
+ * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+
+#include <linux/uaccess.h>
+
+#include "base.h"
+
+struct pnp_info_buffer {
+	char *buffer;		/* pointer to begin of buffer */
+	char *curr;		/* current position in buffer */
+	unsigned long size;	/* current size */
+	unsigned long len;	/* total length of buffer */
+	int stop;		/* stop flag */
+	int error;		/* error code */
+};
+
+typedef struct pnp_info_buffer pnp_info_buffer_t;
+
+static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
+{
+	va_list args;
+	int res;
+
+	if (buffer->stop || buffer->error)
+		return 0;
+	va_start(args, fmt);
+	res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
+	va_end(args);
+	if (buffer->size + res >= buffer->len) {
+		buffer->stop = 1;
+		return 0;
+	}
+	buffer->curr += res;
+	buffer->size += res;
+	return res;
+}
+
+static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
+			   struct pnp_port *port)
+{
+	pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
+		   "%i-bit address decoding\n", space,
+		   (unsigned long long) port->min,
+		   (unsigned long long) port->max,
+		   port->align ? ((unsigned long long) port->align - 1) : 0,
+		   (unsigned long long) port->size,
+		   port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
+}
+
+static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_irq *irq)
+{
+	int first = 1, i;
+
+	pnp_printf(buffer, "%sirq ", space);
+	for (i = 0; i < PNP_IRQ_NR; i++)
+		if (test_bit(i, irq->map.bits)) {
+			if (!first) {
+				pnp_printf(buffer, ",");
+			} else {
+				first = 0;
+			}
+			if (i == 2 || i == 9)
+				pnp_printf(buffer, "2/9");
+			else
+				pnp_printf(buffer, "%i", i);
+		}
+	if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+		pnp_printf(buffer, "<none>");
+	if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
+		pnp_printf(buffer, " High-Edge");
+	if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
+		pnp_printf(buffer, " Low-Edge");
+	if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
+		pnp_printf(buffer, " High-Level");
+	if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
+		pnp_printf(buffer, " Low-Level");
+	if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+		pnp_printf(buffer, " (optional)");
+	pnp_printf(buffer, "\n");
+}
+
+static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_dma *dma)
+{
+	int first = 1, i;
+	char *s;
+
+	pnp_printf(buffer, "%sdma ", space);
+	for (i = 0; i < 8; i++)
+		if (dma->map & (1 << i)) {
+			if (!first) {
+				pnp_printf(buffer, ",");
+			} else {
+				first = 0;
+			}
+			pnp_printf(buffer, "%i", i);
+		}
+	if (!dma->map)
+		pnp_printf(buffer, "<none>");
+	switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
+	case IORESOURCE_DMA_8BIT:
+		s = "8-bit";
+		break;
+	case IORESOURCE_DMA_8AND16BIT:
+		s = "8-bit&16-bit";
+		break;
+	default:
+		s = "16-bit";
+	}
+	pnp_printf(buffer, " %s", s);
+	if (dma->flags & IORESOURCE_DMA_MASTER)
+		pnp_printf(buffer, " master");
+	if (dma->flags & IORESOURCE_DMA_BYTE)
+		pnp_printf(buffer, " byte-count");
+	if (dma->flags & IORESOURCE_DMA_WORD)
+		pnp_printf(buffer, " word-count");
+	switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
+	case IORESOURCE_DMA_TYPEA:
+		s = "type-A";
+		break;
+	case IORESOURCE_DMA_TYPEB:
+		s = "type-B";
+		break;
+	case IORESOURCE_DMA_TYPEF:
+		s = "type-F";
+		break;
+	default:
+		s = "compatible";
+		break;
+	}
+	pnp_printf(buffer, " %s\n", s);
+}
+
+static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
+			  struct pnp_mem *mem)
+{
+	char *s;
+
+	pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
+		   space, (unsigned long long) mem->min,
+		   (unsigned long long) mem->max,
+		   (unsigned long long) mem->align,
+		   (unsigned long long) mem->size);
+	if (mem->flags & IORESOURCE_MEM_WRITEABLE)
+		pnp_printf(buffer, ", writeable");
+	if (mem->flags & IORESOURCE_MEM_CACHEABLE)
+		pnp_printf(buffer, ", cacheable");
+	if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
+		pnp_printf(buffer, ", range-length");
+	if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
+		pnp_printf(buffer, ", shadowable");
+	if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
+		pnp_printf(buffer, ", expansion ROM");
+	switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+	case IORESOURCE_MEM_8BIT:
+		s = "8-bit";
+		break;
+	case IORESOURCE_MEM_8AND16BIT:
+		s = "8-bit&16-bit";
+		break;
+	case IORESOURCE_MEM_32BIT:
+		s = "32-bit";
+		break;
+	default:
+		s = "16-bit";
+	}
+	pnp_printf(buffer, ", %s\n", s);
+}
+
+static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
+			     struct pnp_option *option)
+{
+	switch (option->type) {
+	case IORESOURCE_IO:
+		pnp_print_port(buffer, space, &option->u.port);
+		break;
+	case IORESOURCE_MEM:
+		pnp_print_mem(buffer, space, &option->u.mem);
+		break;
+	case IORESOURCE_IRQ:
+		pnp_print_irq(buffer, space, &option->u.irq);
+		break;
+	case IORESOURCE_DMA:
+		pnp_print_dma(buffer, space, &option->u.dma);
+		break;
+	}
+}
+
+static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	pnp_info_buffer_t *buffer;
+	struct pnp_option *option;
+	int ret, dep = 0, set = 0;
+	char *indent;
+
+	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->len = PAGE_SIZE;
+	buffer->buffer = buf;
+	buffer->curr = buffer->buffer;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (pnp_option_is_dependent(option)) {
+			indent = "  ";
+			if (!dep || pnp_option_set(option) != set) {
+				set = pnp_option_set(option);
+				dep = 1;
+				pnp_printf(buffer, "Dependent: %02i - "
+					   "Priority %s\n", set,
+					   pnp_option_priority_name(option));
+			}
+		} else {
+			dep = 0;
+			indent = "";
+		}
+		pnp_print_option(buffer, indent, option);
+	}
+
+	ret = (buffer->curr - buf);
+	kfree(buffer);
+	return ret;
+}
+static DEVICE_ATTR_RO(options);
+
+static ssize_t resources_show(struct device *dmdev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	pnp_info_buffer_t *buffer;
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+	int ret;
+
+	if (!dev)
+		return -EINVAL;
+
+	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->len = PAGE_SIZE;
+	buffer->buffer = buf;
+	buffer->curr = buffer->buffer;
+
+	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+
+		pnp_printf(buffer, pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
+			pnp_printf(buffer, " disabled\n");
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+		case IORESOURCE_BUS:
+			pnp_printf(buffer, " %#llx-%#llx%s\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end,
+				   res->flags & IORESOURCE_WINDOW ?
+					" window" : "");
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
+			break;
+		}
+	}
+
+	ret = (buffer->curr - buf);
+	kfree(buffer);
+	return ret;
+}
+
+static char *pnp_get_resource_value(char *buf,
+				    unsigned long type,
+				    resource_size_t *start,
+				    resource_size_t *end,
+				    unsigned long *flags)
+{
+	if (start)
+		*start = 0;
+	if (end)
+		*end = 0;
+	if (flags)
+		*flags = 0;
+
+	/* TBD: allow for disabled resources */
+
+	buf = skip_spaces(buf);
+	if (start) {
+		*start = simple_strtoull(buf, &buf, 0);
+		if (end) {
+			buf = skip_spaces(buf);
+			if (*buf == '-') {
+				buf = skip_spaces(buf + 1);
+				*end = simple_strtoull(buf, &buf, 0);
+			} else
+				*end = *start;
+		}
+	}
+
+	/* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
+
+	return buf;
+}
+
+static ssize_t resources_store(struct device *dmdev,
+			       struct device_attribute *attr, const char *ubuf,
+			       size_t count)
+{
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	char *buf = (void *)ubuf;
+	int retval = 0;
+
+	if (dev->status & PNP_ATTACHED) {
+		retval = -EBUSY;
+		dev_info(&dev->dev, "in use; can't configure\n");
+		goto done;
+	}
+
+	buf = skip_spaces(buf);
+	if (!strncasecmp(buf, "disable", 7)) {
+		retval = pnp_disable_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "activate", 8)) {
+		retval = pnp_activate_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "fill", 4)) {
+		if (dev->active)
+			goto done;
+		retval = pnp_auto_config_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "auto", 4)) {
+		if (dev->active)
+			goto done;
+		pnp_init_resources(dev);
+		retval = pnp_auto_config_dev(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "clear", 5)) {
+		if (dev->active)
+			goto done;
+		pnp_init_resources(dev);
+		goto done;
+	}
+	if (!strncasecmp(buf, "get", 3)) {
+		mutex_lock(&pnp_res_mutex);
+		if (pnp_can_read(dev))
+			dev->protocol->get(dev);
+		mutex_unlock(&pnp_res_mutex);
+		goto done;
+	}
+	if (!strncasecmp(buf, "set", 3)) {
+		resource_size_t start;
+		resource_size_t end;
+		unsigned long flags;
+
+		if (dev->active)
+			goto done;
+		buf += 3;
+		pnp_init_resources(dev);
+		mutex_lock(&pnp_res_mutex);
+		while (1) {
+			buf = skip_spaces(buf);
+			if (!strncasecmp(buf, "io", 2)) {
+				buf = pnp_get_resource_value(buf + 2,
+							     IORESOURCE_IO,
+							     &start, &end,
+							     &flags);
+				pnp_add_io_resource(dev, start, end, flags);
+			} else if (!strncasecmp(buf, "mem", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_MEM,
+							     &start, &end,
+							     &flags);
+				pnp_add_mem_resource(dev, start, end, flags);
+			} else if (!strncasecmp(buf, "irq", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_IRQ,
+							     &start, NULL,
+							     &flags);
+				pnp_add_irq_resource(dev, start, flags);
+			} else if (!strncasecmp(buf, "dma", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_DMA,
+							     &start, NULL,
+							     &flags);
+				pnp_add_dma_resource(dev, start, flags);
+			} else if (!strncasecmp(buf, "bus", 3)) {
+				buf = pnp_get_resource_value(buf + 3,
+							     IORESOURCE_BUS,
+							     &start, &end,
+							     NULL);
+				pnp_add_bus_resource(dev, start, end);
+			} else
+				break;
+		}
+		mutex_unlock(&pnp_res_mutex);
+		goto done;
+	}
+
+done:
+	if (retval < 0)
+		return retval;
+	return count;
+}
+static DEVICE_ATTR_RW(resources);
+
+static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,
+		       char *buf)
+{
+	char *str = buf;
+	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	struct pnp_id *pos = dev->id;
+
+	while (pos) {
+		str += sprintf(str, "%s\n", pos->id);
+		pos = pos->next;
+	}
+	return (str - buf);
+}
+static DEVICE_ATTR_RO(id);
+
+static struct attribute *pnp_dev_attrs[] = {
+	&dev_attr_resources.attr,
+	&dev_attr_options.attr,
+	&dev_attr_id.attr,
+	NULL,
+};
+
+static const struct attribute_group pnp_dev_group = {
+	.attrs = pnp_dev_attrs,
+};
+
+const struct attribute_group *pnp_dev_groups[] = {
+	&pnp_dev_group,
+	NULL,
+};