17 files changed, 292 insertions, 90 deletions

diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index 1284138e42ab..4bf75597f732 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -102,7 +102,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
         pdevinfo.id = -1;
         pdevinfo.res = resources;
         pdevinfo.num_res = count;
-        pdevinfo.acpi_node.companion = adev;
+        pdevinfo.fwnode = acpi_fwnode_handle(adev);
         pdevinfo.dma_mask = DMA_BIT_MASK(32);
         pdev = platform_device_register_full(&pdevinfo);
         if (IS_ERR(pdev))
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index d9339b442a4e..a688aa243f6c 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -615,7 +615,7 @@ void acpi_dock_add(struct acpi_device *adev)
         memset(&pdevinfo, 0, sizeof(pdevinfo));
         pdevinfo.name = "dock";
         pdevinfo.id = dock_station_count;
-        pdevinfo.acpi_node.companion = adev;
+        pdevinfo.fwnode = acpi_fwnode_handle(adev);
         pdevinfo.data = &ds;
         pdevinfo.size_data = sizeof(ds);
         dd = platform_device_register_full(&pdevinfo);
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index f774c65ecb8b..39c485b0c25c 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -168,7 +168,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
         unsigned int node_id;
         int retval = -EINVAL;
 
-        if (ACPI_COMPANION(dev)) {
+        if (has_acpi_companion(dev)) {
                 if (acpi_dev) {
                         dev_warn(dev, "ACPI companion already set\n");
                         return -EINVAL;
@@ -220,7 +220,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
         list_add(&physical_node->node, physnode_list);
         acpi_dev->physical_node_count++;
 
-        if (!ACPI_COMPANION(dev))
+        if (!has_acpi_companion(dev))
                 ACPI_COMPANION_SET(dev, acpi_dev);
 
         acpi_physnode_link_name(physical_node_name, node_id);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 07304a3b9ee2..c7e2a9a70865 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -12,6 +12,7 @@
 
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/fwnode.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -2133,3 +2134,53 @@ define_dev_printk_level(dev_notice, KERN_NOTICE);
 define_dev_printk_level(_dev_info, KERN_INFO);
 
 #endif
+
+static inline bool fwnode_is_primary(struct fwnode_handle *fwnode)
+{
+        return fwnode && !IS_ERR(fwnode->secondary);
+}
+
+/**
+ * set_primary_fwnode - Change the primary firmware node of a given device.
+ * @dev: Device to handle.
+ * @fwnode: New primary firmware node of the device.
+ *
+ * Set the device's firmware node pointer to @fwnode, but if a secondary
+ * firmware node of the device is present, preserve it.
+ */
+void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
+{
+        if (fwnode) {
+                struct fwnode_handle *fn = dev->fwnode;
+
+                if (fwnode_is_primary(fn))
+                        fn = fn->secondary;
+
+                fwnode->secondary = fn;
+                dev->fwnode = fwnode;
+        } else {
+                dev->fwnode = fwnode_is_primary(dev->fwnode) ?
+                        dev->fwnode->secondary : NULL;
+        }
+}
+EXPORT_SYMBOL_GPL(set_primary_fwnode);
+
+/**
+ * set_secondary_fwnode - Change the secondary firmware node of a given device.
+ * @dev: Device to handle.
+ * @fwnode: New secondary firmware node of the device.
+ *
+ * If a primary firmware node of the device is present, set its secondary
+ * pointer to @fwnode.  Otherwise, set the device's firmware node pointer to
+ * @fwnode.
+ */
+void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
+{
+        if (fwnode)
+                fwnode->secondary = ERR_PTR(-ENODEV);
+
+        if (fwnode_is_primary(dev->fwnode))
+                dev->fwnode->secondary = fwnode;
+        else
+                dev->fwnode = fwnode;
+}
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 9421fed40905..17f0204fabef 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -454,7 +454,7 @@ struct platform_device *platform_device_register_full(
                 goto err_alloc;
 
         pdev->dev.parent = pdevinfo->parent;
-        ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion);
+        pdev->dev.fwnode = pdevinfo->fwnode;
 
         if (pdevinfo->dma_mask) {
                 /*
diff --git a/drivers/base/property.c b/drivers/base/property.c
index c45845874d4f..6a3f7d8af341 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -10,10 +10,102 @@
  * published by the Free Software Foundation.
  */
 
-#include <linux/property.h>
-#include <linux/export.h>
 #include <linux/acpi.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
 #include <linux/of.h>
+#include <linux/property.h>
+
+/**
+ * device_add_property_set - Add a collection of properties to a device object.
+ * @dev: Device to add properties to.
+ * @pset: Collection of properties to add.
+ *
+ * Associate a collection of device properties represented by @pset with @dev
+ * as its secondary firmware node.
+ */
+void device_add_property_set(struct device *dev, struct property_set *pset)
+{
+        if (pset)
+                pset->fwnode.type = FWNODE_PDATA;
+
+        set_secondary_fwnode(dev, &pset->fwnode);
+}
+EXPORT_SYMBOL_GPL(device_add_property_set);
+
+static inline bool is_pset(struct fwnode_handle *fwnode)
+{
+        return fwnode && fwnode->type == FWNODE_PDATA;
+}
+
+static inline struct property_set *to_pset(struct fwnode_handle *fwnode)
+{
+        return is_pset(fwnode) ?
+                container_of(fwnode, struct property_set, fwnode) : NULL;
+}
+
+static struct property_entry *pset_prop_get(struct property_set *pset,
+                                            const char *name)
+{
+        struct property_entry *prop;
+
+        if (!pset || !pset->properties)
+                return NULL;
+
+        for (prop = pset->properties; prop->name; prop++)
+                if (!strcmp(name, prop->name))
+                        return prop;
+
+        return NULL;
+}
+
+static int pset_prop_read_array(struct property_set *pset, const char *name,
+                                enum dev_prop_type type, void *val, size_t nval)
+{
+        struct property_entry *prop;
+        unsigned int item_size;
+
+        prop = pset_prop_get(pset, name);
+        if (!prop)
+                return -ENODATA;
+
+        if (prop->type != type)
+                return -EPROTO;
+
+        if (!val)
+                return prop->nval;
+
+        if (prop->nval < nval)
+                return -EOVERFLOW;
+
+        switch (type) {
+        case DEV_PROP_U8:
+                item_size = sizeof(u8);
+                break;
+        case DEV_PROP_U16:
+                item_size = sizeof(u16);
+                break;
+        case DEV_PROP_U32:
+                item_size = sizeof(u32);
+                break;
+        case DEV_PROP_U64:
+                item_size = sizeof(u64);
+                break;
+        case DEV_PROP_STRING:
+                item_size = sizeof(const char *);
+                break;
+        default:
+                return -EINVAL;
+        }
+        memcpy(val, prop->value.raw_data, nval * item_size);
+        return 0;
+}
+
+static inline struct fwnode_handle *dev_fwnode(struct device *dev)
+{
+        return IS_ENABLED(CONFIG_OF) && dev->of_node ?
+                &dev->of_node->fwnode : dev->fwnode;
+}
 
 /**
  * device_property_present - check if a property of a device is present
@@ -24,10 +116,7 @@
  */
 bool device_property_present(struct device *dev, const char *propname)
 {
-        if (IS_ENABLED(CONFIG_OF) && dev->of_node)
-                return of_property_read_bool(dev->of_node, propname);
-
-        return !acpi_dev_prop_get(ACPI_COMPANION(dev), propname, NULL);
+        return fwnode_property_present(dev_fwnode(dev), propname);
 }
 EXPORT_SYMBOL_GPL(device_property_present);
 
@@ -43,32 +132,22 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
         else if (is_acpi_node(fwnode))
                 return !acpi_dev_prop_get(acpi_node(fwnode), propname, NULL);
 
-        return false;
+        return !!pset_prop_get(to_pset(fwnode), propname);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_present);
 
-#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \
-        (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
-              : of_property_count_elems_of_size((node), (propname), sizeof(type))
-
-#define DEV_PROP_READ_ARRAY(_dev_, _propname_, _type_, _proptype_, _val_, _nval_) \
-        IS_ENABLED(CONFIG_OF) && _dev_->of_node ? \
-                (OF_DEV_PROP_READ_ARRAY(_dev_->of_node, _propname_, _type_, \
-                                        _val_, _nval_)) : \
-                acpi_dev_prop_read(ACPI_COMPANION(_dev_), _propname_, \
-                                   _proptype_, _val_, _nval_)
-
 /**
  * device_property_read_u8_array - return a u8 array property of a device
  * @dev: Device to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Function reads an array of u8 properties with @propname from the device
  * firmware description and stores them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -77,7 +156,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_present);
 int device_property_read_u8_array(struct device *dev, const char *propname,
                                   u8 *val, size_t nval)
 {
-        return DEV_PROP_READ_ARRAY(dev, propname, u8, DEV_PROP_U8, val, nval);
+        return fwnode_property_read_u8_array(dev_fwnode(dev), propname, val, nval);
 }
 EXPORT_SYMBOL_GPL(device_property_read_u8_array);
 
@@ -85,13 +164,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array);
  * device_property_read_u16_array - return a u16 array property of a device
  * @dev: Device to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Function reads an array of u16 properties with @propname from the device
  * firmware description and stores them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -100,7 +180,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array);
 int device_property_read_u16_array(struct device *dev, const char *propname,
                                    u16 *val, size_t nval)
 {
-        return DEV_PROP_READ_ARRAY(dev, propname, u16, DEV_PROP_U16, val, nval);
+        return fwnode_property_read_u16_array(dev_fwnode(dev), propname, val, nval);
 }
 EXPORT_SYMBOL_GPL(device_property_read_u16_array);
 
@@ -108,13 +188,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array);
  * device_property_read_u32_array - return a u32 array property of a device
  * @dev: Device to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Function reads an array of u32 properties with @propname from the device
  * firmware description and stores them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -123,7 +204,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array);
 int device_property_read_u32_array(struct device *dev, const char *propname,
                                    u32 *val, size_t nval)
 {
-        return DEV_PROP_READ_ARRAY(dev, propname, u32, DEV_PROP_U32, val, nval);
+        return fwnode_property_read_u32_array(dev_fwnode(dev), propname, val, nval);
 }
 EXPORT_SYMBOL_GPL(device_property_read_u32_array);
 
@@ -131,13 +212,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array);
  * device_property_read_u64_array - return a u64 array property of a device
  * @dev: Device to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Function reads an array of u64 properties with @propname from the device
  * firmware description and stores them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -146,7 +228,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array);
 int device_property_read_u64_array(struct device *dev, const char *propname,
                                    u64 *val, size_t nval)
 {
-        return DEV_PROP_READ_ARRAY(dev, propname, u64, DEV_PROP_U64, val, nval);
+        return fwnode_property_read_u64_array(dev_fwnode(dev), propname, val, nval);
 }
 EXPORT_SYMBOL_GPL(device_property_read_u64_array);
 
@@ -154,13 +236,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array);
  * device_property_read_string_array - return a string array property of device
  * @dev: Device to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Function reads an array of string properties with @propname from the device
  * firmware description and stores them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO or %-EILSEQ if the property is not an array of strings,
@@ -169,10 +252,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array);
 int device_property_read_string_array(struct device *dev, const char *propname,
                                       const char **val, size_t nval)
 {
-        return IS_ENABLED(CONFIG_OF) && dev->of_node ?
-                of_property_read_string_array(dev->of_node, propname, val, nval) :
-                acpi_dev_prop_read(ACPI_COMPANION(dev), propname,
-                                   DEV_PROP_STRING, val, nval);
+        return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval);
 }
 EXPORT_SYMBOL_GPL(device_property_read_string_array);
 
@@ -193,13 +273,14 @@ EXPORT_SYMBOL_GPL(device_property_read_string_array);
 int device_property_read_string(struct device *dev, const char *propname,
                                 const char **val)
 {
-        return IS_ENABLED(CONFIG_OF) && dev->of_node ?
-                of_property_read_string(dev->of_node, propname, val) :
-                acpi_dev_prop_read(ACPI_COMPANION(dev), propname,
-                                   DEV_PROP_STRING, val, 1);
+        return fwnode_property_read_string(dev_fwnode(dev), propname, val);
 }
 EXPORT_SYMBOL_GPL(device_property_read_string);
 
+#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \
+        (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
+              : of_property_count_elems_of_size((node), (propname), sizeof(type))
+
 #define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \
 ({ \
         int _ret_; \
@@ -210,7 +291,8 @@ EXPORT_SYMBOL_GPL(device_property_read_string);
                 _ret_ = acpi_dev_prop_read(acpi_node(_fwnode_), _propname_, \
                                            _proptype_, _val_, _nval_); \
         else \
-                _ret_ = -ENXIO; \
+                _ret_ = pset_prop_read_array(to_pset(_fwnode_), _propname_, \
+                                             _proptype_, _val_, _nval_); \
         _ret_; \
 })
 
@@ -218,13 +300,14 @@ EXPORT_SYMBOL_GPL(device_property_read_string);
  * fwnode_property_read_u8_array - return a u8 array property of firmware node
  * @fwnode: Firmware node to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Read an array of u8 properties with @propname from @fwnode and stores them to
  * @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -243,13 +326,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array);
  * fwnode_property_read_u16_array - return a u16 array property of firmware node
  * @fwnode: Firmware node to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Read an array of u16 properties with @propname from @fwnode and store them to
  * @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -268,13 +352,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array);
  * fwnode_property_read_u32_array - return a u32 array property of firmware node
  * @fwnode: Firmware node to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Read an array of u32 properties with @propname from @fwnode store them to
  * @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -293,13 +378,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array);
  * fwnode_property_read_u64_array - return a u64 array property firmware node
  * @fwnode: Firmware node to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Read an array of u64 properties with @propname from @fwnode and store them to
  * @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of numbers,
@@ -318,13 +404,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array);
  * fwnode_property_read_string_array - return string array property of a node
  * @fwnode: Firmware node to get the property of
  * @propname: Name of the property
- * @val: The values are stored here
+ * @val: The values are stored here or %NULL to return the number of values
  * @nval: Size of the @val array
  *
  * Read an string list property @propname from the given firmware node and store
  * them to @val if found.
  *
- * Return: %0 if the property was found (success),
+ * Return: number of values if @val was %NULL,
+ *         %0 if the property was found (success),
  *         %-EINVAL if given arguments are not valid,
  *         %-ENODATA if the property does not have a value,
  *         %-EPROTO if the property is not an array of strings,
@@ -336,13 +423,16 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
                                       size_t nval)
 {
         if (is_of_node(fwnode))
-                return of_property_read_string_array(of_node(fwnode), propname,
-                                                     val, nval);
+                return val ?
+                        of_property_read_string_array(of_node(fwnode), propname,
+                                                      val, nval) :
+                        of_property_count_strings(of_node(fwnode), propname);
         else if (is_acpi_node(fwnode))
                 return acpi_dev_prop_read(acpi_node(fwnode), propname,
                                           DEV_PROP_STRING, val, nval);
 
-        return -ENXIO;
+        return pset_prop_read_array(to_pset(fwnode), propname,
+                                    DEV_PROP_STRING, val, nval);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_string_array);
 
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 550a5eafbd38..ab892be26dc2 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -17,6 +17,8 @@
 
 enum of_gpio_flags;
 
+struct acpi_device;
+
 /**
  * struct acpi_gpio_info - ACPI GPIO specific information
  * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index c270f5f9a8f9..538d6910b550 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -166,7 +166,7 @@ static int dw_i2c_probe(struct platform_device *pdev)
         /* fast mode by default because of legacy reasons */
         clk_freq = 400000;
 
-        if (ACPI_COMPANION(&pdev->dev)) {
+        if (has_acpi_companion(&pdev->dev)) {
                 dw_i2c_acpi_configure(pdev);
         } else if (pdev->dev.of_node) {
                 of_property_read_u32(pdev->dev.of_node,
@@ -286,7 +286,7 @@ static int dw_i2c_remove(struct platform_device *pdev)
         pm_runtime_put(&pdev->dev);
         pm_runtime_disable(&pdev->dev);
 
-        if (ACPI_COMPANION(&pdev->dev))
+        if (has_acpi_companion(&pdev->dev))
                 dw_i2c_acpi_unconfigure(pdev);
 
         return 0;
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index edf274cabe81..c87c31387e2d 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -133,7 +133,7 @@ static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,
                 return AE_OK;
 
         memset(&info, 0, sizeof(info));
-        info.acpi_node.companion = adev;
+        info.fwnode = acpi_fwnode_handle(adev);
         info.irq = -1;
 
         INIT_LIST_HEAD(&resource_list);
@@ -971,7 +971,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
         client->dev.bus = &i2c_bus_type;
         client->dev.type = &i2c_client_type;
         client->dev.of_node = info->of_node;
-        ACPI_COMPANION_SET(&client->dev, info->acpi_node.companion);
+        client->dev.fwnode = info->fwnode;
 
         i2c_dev_set_name(adap, client);
         status = device_register(&client->dev);
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 2d1e05bdbb53..4fc1f8a7f98e 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -684,7 +684,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
         if (dev_is_pci(dev)) {
                 pdev = to_pci_dev(dev);
                 segment = pci_domain_nr(pdev->bus);
-        } else if (ACPI_COMPANION(dev))
+        } else if (has_acpi_companion(dev))
                 dev = &ACPI_COMPANION(dev)->dev;
 
         rcu_read_lock();
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index f8009d99190a..8de4fa90e8c4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -387,7 +387,8 @@ static inline bool is_acpi_node(struct fwnode_handle *fwnode)
 
 static inline struct acpi_device *acpi_node(struct fwnode_handle *fwnode)
 {
-        return fwnode ? container_of(fwnode, struct acpi_device, fwnode) : NULL;
+        return is_acpi_node(fwnode) ?
+                container_of(fwnode, struct acpi_device, fwnode) : NULL;
 }
 
 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 24c7aa8b1d20..dd12127f171c 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -53,10 +53,16 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
         return adev ? adev->handle : NULL;
 }
 
-#define ACPI_COMPANION(dev)             ((dev)->acpi_node.companion)
-#define ACPI_COMPANION_SET(dev, adev)   ACPI_COMPANION(dev) = (adev)
+#define ACPI_COMPANION(dev)             acpi_node((dev)->fwnode)
+#define ACPI_COMPANION_SET(dev, adev)   set_primary_fwnode(dev, (adev) ? \
+        acpi_fwnode_handle(adev) : NULL)
 #define ACPI_HANDLE(dev)                acpi_device_handle(ACPI_COMPANION(dev))
 
+static inline bool has_acpi_companion(struct device *dev)
+{
+        return is_acpi_node(dev->fwnode);
+}
+
 static inline void acpi_preset_companion(struct device *dev,
                                          struct acpi_device *parent, u64 addr)
 {
@@ -471,6 +477,11 @@ static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
         return NULL;
 }
 
+static inline bool has_acpi_companion(struct device *dev)
+{
+        return false;
+}
+
 static inline const char *acpi_dev_name(struct acpi_device *adev)
 {
         return NULL;
diff --git a/include/linux/device.h b/include/linux/device.h
index 0eb8ee2dc6d1..324d02add7b4 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -38,6 +38,7 @@ struct class;
 struct subsys_private;
 struct bus_type;
 struct device_node;
+struct fwnode_handle;
 struct iommu_ops;
 struct iommu_group;
 
@@ -650,14 +651,6 @@ struct device_dma_parameters {
         unsigned long segment_boundary_mask;
 };
 
-struct acpi_device;
-
-struct acpi_dev_node {
-#ifdef CONFIG_ACPI
-        struct acpi_device *companion;
-#endif
-};
-
 /**
  * struct device - The basic device structure
  * @parent:     The device's "parent" device, the device to which it is attached.
@@ -703,7 +696,7 @@ struct acpi_dev_node {
  * @cma_area:   Contiguous memory area for dma allocations
  * @archdata:   For arch-specific additions.
  * @of_node:    Associated device tree node.
- * @acpi_node:  Associated ACPI device node.
+ * @fwnode:     Associated device node supplied by platform firmware.
  * @devt:       For creating the sysfs "dev".
  * @id:         device instance
  * @devres_lock: Spinlock to protect the resource of the device.
@@ -779,7 +772,7 @@ struct device {
         struct dev_archdata     archdata;
 
         struct device_node      *of_node; /* associated device tree node */
-        struct acpi_dev_node    acpi_node; /* associated ACPI device node */
+        struct fwnode_handle    *fwnode; /* firmware device node */
 
         dev_t                   devt;   /* dev_t, creates the sysfs "dev" */
         u32                     id;     /* device instance */
@@ -947,6 +940,9 @@ extern void unlock_device_hotplug(void);
 extern int lock_device_hotplug_sysfs(void);
 extern int device_offline(struct device *dev);
 extern int device_online(struct device *dev);
+extern void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
+extern void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode);
+
 /*
  * Root device objects for grouping under /sys/devices
  */
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
new file mode 100644
index 000000000000..0408545bce42
--- /dev/null
+++ b/include/linux/fwnode.h
@@ -0,0 +1,27 @@
+/*
+ * fwnode.h - Firmware device node object handle type definition.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * 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.
+ */
+
+#ifndef _LINUX_FWNODE_H_
+#define _LINUX_FWNODE_H_
+
+enum fwnode_type {
+        FWNODE_INVALID = 0,
+        FWNODE_OF,
+        FWNODE_ACPI,
+        FWNODE_PDATA,
+};
+
+struct fwnode_handle {
+        enum fwnode_type type;
+        struct fwnode_handle *secondary;
+};
+
+#endif
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index f17da50402a4..6d89575361a8 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -278,7 +278,7 @@ static inline int i2c_slave_event(struct i2c_client *client,
  * @platform_data: stored in i2c_client.dev.platform_data
  * @archdata: copied into i2c_client.dev.archdata
  * @of_node: pointer to OpenFirmware device node
- * @acpi_node: ACPI device node
+ * @fwnode: device node supplied by the platform firmware
  * @irq: stored in i2c_client.irq
  *
  * I2C doesn't actually support hardware probing, although controllers and
@@ -299,7 +299,7 @@ struct i2c_board_info {
         void            *platform_data;
         struct dev_archdata     *archdata;
         struct device_node *of_node;
-        struct acpi_dev_node acpi_node;
+        struct fwnode_handle *fwnode;
         int             irq;
 };
 
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index ae4882ca4a64..58f1e75ba105 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -59,7 +59,7 @@ extern int platform_add_devices(struct platform_device **, int);
 
 struct platform_device_info {
                 struct device *parent;
-                struct acpi_dev_node acpi_node;
+                struct fwnode_handle *fwnode;
 
                 const char *name;
                 int id;
diff --git a/include/linux/property.h b/include/linux/property.h
index a6a3d98bd7e9..de8bdf417a35 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -13,6 +13,7 @@
 #ifndef _LINUX_PROPERTY_H_
 #define _LINUX_PROPERTY_H_
 
+#include <linux/fwnode.h>
 #include <linux/types.h>
 
 struct device;
@@ -40,16 +41,6 @@ int device_property_read_string_array(struct device *dev, const char *propname,
 int device_property_read_string(struct device *dev, const char *propname,
                                 const char **val);
 
-enum fwnode_type {
-        FWNODE_INVALID = 0,
-        FWNODE_OF,
-        FWNODE_ACPI,
-};
-
-struct fwnode_handle {
-        enum fwnode_type type;
-};
-
 bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
 int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
                                   const char *propname, u8 *val,
@@ -140,4 +131,37 @@ static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
         return fwnode_property_read_u64_array(fwnode, propname, val, 1);
 }
 
+/**
+ * struct property_entry - "Built-in" device property representation.
+ * @name: Name of the property.
+ * @type: Type of the property.
+ * @nval: Number of items of type @type making up the value.
+ * @value: Value of the property (an array of @nval items of type @type).
+ */
+struct property_entry {
+        const char *name;
+        enum dev_prop_type type;
+        size_t nval;
+        union {
+                void *raw_data;
+                u8 *u8_data;
+                u16 *u16_data;
+                u32 *u32_data;
+                u64 *u64_data;
+                const char **str;
+        } value;
+};
+
+/**
+ * struct property_set - Collection of "built-in" device properties.
+ * @fwnode: Handle to be pointed to by the fwnode field of struct device.
+ * @properties: Array of properties terminated with a null entry.
+ */
+struct property_set {
+        struct fwnode_handle fwnode;
+        struct property_entry *properties;
+};
+
+void device_add_property_set(struct device *dev, struct property_set *pset);
+
 #endif /* _LINUX_PROPERTY_H_ */