From cde1f95f407a593ad6baf1b7b01daa2c6cbd34fd Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 6 Jun 2017 12:37:36 +0300
Subject: ACPI: Constify argument to acpi_device_is_present()

This will be needed in constifying the fwnode API.

The side effects the function had have been moved to the callers.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/device_pm.c | 4 +++-
 drivers/acpi/internal.h  | 2 +-
 drivers/acpi/scan.c      | 9 +++------
 3 files changed, 7 insertions(+), 8 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 993fd31394c8..e565ed329f11 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -261,8 +261,10 @@ int acpi_bus_init_power(struct acpi_device *device)
 		return -EINVAL;
 
 	device->power.state = ACPI_STATE_UNKNOWN;
-	if (!acpi_device_is_present(device))
+	if (!acpi_device_is_present(device)) {
+		device->flags.initialized = false;
 		return -ENXIO;
+	}
 
 	result = acpi_device_get_power(device, &state);
 	if (result)
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 66229ffa909b..73002402c461 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -111,7 +111,7 @@ int acpi_device_setup_files(struct acpi_device *dev);
 void acpi_device_remove_files(struct acpi_device *dev);
 void acpi_device_add_finalize(struct acpi_device *device);
 void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
-bool acpi_device_is_present(struct acpi_device *adev);
+bool acpi_device_is_present(const struct acpi_device *adev);
 bool acpi_device_is_battery(struct acpi_device *adev);
 bool acpi_device_is_first_physical_node(struct acpi_device *adev,
 					const struct device *dev);
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 3a10d7573477..c98f88b28948 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1567,13 +1567,9 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type,
 	return 0;
 }
 
-bool acpi_device_is_present(struct acpi_device *adev)
+bool acpi_device_is_present(const struct acpi_device *adev)
 {
-	if (adev->status.present || adev->status.functional)
-		return true;
-
-	adev->flags.initialized = false;
-	return false;
+	return adev->status.present || adev->status.functional;
 }
 
 static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
@@ -1831,6 +1827,7 @@ static void acpi_bus_attach(struct acpi_device *device)
 	acpi_bus_get_status(device);
 	/* Skip devices that are not present. */
 	if (!acpi_device_is_present(device)) {
+		device->flags.initialized = false;
 		acpi_device_clear_enumerated(device);
 		device->flags.power_manageable = 0;
 		return;
-- 
cgit v1.2.3


From 3708184afc77bb67709a67a35d9f367ebd32cbc4 Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 6 Jun 2017 12:37:37 +0300
Subject: device property: Move FW type specific functionality to FW specific
 files

The device and fwnode property API supports Devicetree, ACPI and pset
properties. The implementation of this functionality for each firmware
type was embedded in the fwnode property core. Move it out to firmware
type specific locations, making it easier to maintain.

Depends-on: ("of: Move OF property and graph API from base.c to property.c")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/property.c |  68 ++++++++++++++++
 drivers/acpi/scan.c     |   1 +
 drivers/base/property.c | 208 +++++++++++++++++++-----------------------------
 drivers/of/property.c   |  90 +++++++++++++++++++++
 include/linux/acpi.h    |   4 +
 include/linux/fwnode.h  |  54 +++++++++++++
 include/linux/of.h      |   2 +
 7 files changed, 302 insertions(+), 125 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 9364398204e9..14013f635db6 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -57,6 +57,7 @@ static bool acpi_nondev_subnode_extract(const union acpi_object *desc,
 
 	dn->name = link->package.elements[0].string.pointer;
 	dn->fwnode.type = FWNODE_ACPI_DATA;
+	dn->fwnode.ops = &acpi_fwnode_ops;
 	dn->parent = parent;
 	INIT_LIST_HEAD(&dn->data.subnodes);
 
@@ -1119,3 +1120,70 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode,
 
 	return 0;
 }
+
+static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode,
+					 const char *propname)
+{
+	return !acpi_node_prop_get(fwnode, propname, NULL);
+}
+
+static int acpi_fwnode_property_read_int_array(struct fwnode_handle *fwnode,
+					       const char *propname,
+					       unsigned int elem_size,
+					       void *val, size_t nval)
+{
+	enum dev_prop_type type;
+
+	switch (elem_size) {
+	case sizeof(u8):
+		type = DEV_PROP_U8;
+		break;
+	case sizeof(u16):
+		type = DEV_PROP_U16;
+		break;
+	case sizeof(u32):
+		type = DEV_PROP_U32;
+		break;
+	case sizeof(u64):
+		type = DEV_PROP_U64;
+		break;
+	default:
+		return -ENXIO;
+	}
+
+	return acpi_node_prop_read(fwnode, propname, type, val, nval);
+}
+
+static int acpi_fwnode_property_read_string_array(struct fwnode_handle *fwnode,
+						  const char *propname,
+						  const char **val, size_t nval)
+{
+	return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
+				   val, nval);
+}
+
+static struct fwnode_handle *
+acpi_fwnode_get_named_child_node(struct fwnode_handle *fwnode,
+				 const char *childname)
+{
+	struct fwnode_handle *child;
+
+	/*
+	 * Find first matching named child node of this fwnode.
+	 * For ACPI this will be a data only sub-node.
+	 */
+	fwnode_for_each_child_node(fwnode, child)
+		if (acpi_data_node_match(child, childname))
+			return child;
+
+	return NULL;
+}
+
+const struct fwnode_operations acpi_fwnode_ops = {
+	.property_present = acpi_fwnode_property_present,
+	.property_read_int_array = acpi_fwnode_property_read_int_array,
+	.property_read_string_array = acpi_fwnode_property_read_string_array,
+	.get_parent = acpi_node_get_parent,
+	.get_next_child_node = acpi_get_next_subnode,
+	.get_named_child_node = acpi_fwnode_get_named_child_node,
+};
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index c98f88b28948..bc2a525c495f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1436,6 +1436,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
 	device->handle = handle;
 	device->parent = acpi_bus_get_parent(handle);
 	device->fwnode.type = FWNODE_ACPI;
+	device->fwnode.ops = &acpi_fwnode_ops;
 	acpi_set_device_status(device, sta);
 	acpi_device_get_busid(device);
 	acpi_set_pnp_ids(handle, &device->pnp, type);
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 149de311a10e..fee0705e40e9 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -187,6 +187,50 @@ struct fwnode_handle *dev_fwnode(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_fwnode);
 
+static bool pset_fwnode_property_present(struct fwnode_handle *fwnode,
+					 const char *propname)
+{
+	return !!pset_prop_get(to_pset_node(fwnode), propname);
+}
+
+static int pset_fwnode_read_int_array(struct fwnode_handle *fwnode,
+				      const char *propname,
+				      unsigned int elem_size, void *val,
+				      size_t nval)
+{
+	struct property_set *node = to_pset_node(fwnode);
+
+	if (!val)
+		return pset_prop_count_elems_of_size(node, propname, elem_size);
+
+	switch (elem_size) {
+	case sizeof(u8):
+		return pset_prop_read_u8_array(node, propname, val, nval);
+	case sizeof(u16):
+		return pset_prop_read_u16_array(node, propname, val, nval);
+	case sizeof(u32):
+		return pset_prop_read_u32_array(node, propname, val, nval);
+	case sizeof(u64):
+		return pset_prop_read_u64_array(node, propname, val, nval);
+	}
+
+	return -ENXIO;
+}
+
+static int pset_fwnode_property_read_string_array(struct fwnode_handle *fwnode,
+						  const char *propname,
+						  const char **val, size_t nval)
+{
+	return pset_prop_read_string_array(to_pset_node(fwnode), propname,
+					   val, nval);
+}
+
+static const struct fwnode_operations pset_fwnode_ops = {
+	.property_present = pset_fwnode_property_present,
+	.property_read_int_array = pset_fwnode_read_int_array,
+	.property_read_string_array = pset_fwnode_property_read_string_array,
+};
+
 /**
  * device_property_present - check if a property of a device is present
  * @dev: Device whose property is being checked
@@ -200,18 +244,6 @@ bool device_property_present(struct device *dev, const char *propname)
 }
 EXPORT_SYMBOL_GPL(device_property_present);
 
-static bool __fwnode_property_present(struct fwnode_handle *fwnode,
-				      const char *propname)
-{
-	if (is_of_node(fwnode))
-		return of_property_read_bool(to_of_node(fwnode), propname);
-	else if (is_acpi_node(fwnode))
-		return !acpi_node_prop_get(fwnode, propname, NULL);
-	else if (is_pset_node(fwnode))
-		return !!pset_prop_get(to_pset_node(fwnode), propname);
-	return false;
-}
-
 /**
  * fwnode_property_present - check if a property of a firmware node is present
  * @fwnode: Firmware node whose property to check
@@ -221,10 +253,11 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname)
 {
 	bool ret;
 
-	ret = __fwnode_property_present(fwnode, propname);
+	ret = fwnode_call_int_op(fwnode, property_present, propname);
 	if (ret == false && !IS_ERR_OR_NULL(fwnode) &&
 	    !IS_ERR_OR_NULL(fwnode->secondary))
-		ret = __fwnode_property_present(fwnode->secondary, propname);
+		ret = fwnode_call_int_op(fwnode->secondary, property_present,
+					 propname);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(fwnode_property_present);
@@ -398,42 +431,23 @@ int device_property_match_string(struct device *dev, const char *propname,
 }
 EXPORT_SYMBOL_GPL(device_property_match_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 PSET_PROP_READ_ARRAY(node, propname, type, val, nval)				\
-	(val) ? pset_prop_read_##type##_array((node), (propname), (val), (nval))	\
-	      : pset_prop_count_elems_of_size((node), (propname), sizeof(type))
-
-#define FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_)	\
-({											\
-	int _ret_;									\
-	if (is_of_node(_fwnode_))							\
-		_ret_ = OF_DEV_PROP_READ_ARRAY(to_of_node(_fwnode_), _propname_,	\
-					       _type_, _val_, _nval_);			\
-	else if (is_acpi_node(_fwnode_))						\
-		_ret_ = acpi_node_prop_read(_fwnode_, _propname_, _proptype_,		\
-					    _val_, _nval_);				\
-	else if (is_pset_node(_fwnode_)) 						\
-		_ret_ = PSET_PROP_READ_ARRAY(to_pset_node(_fwnode_), _propname_,	\
-					     _type_, _val_, _nval_);			\
-	else										\
-		_ret_ = -ENXIO;								\
-	_ret_;										\
-})
-
-#define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_)	\
-({											\
-	int _ret_;									\
-	_ret_ = FWNODE_PROP_READ(_fwnode_, _propname_, _type_, _proptype_,		\
-				 _val_, _nval_);					\
-	if (_ret_ == -EINVAL && !IS_ERR_OR_NULL(_fwnode_) &&				\
-	    !IS_ERR_OR_NULL(_fwnode_->secondary))					\
-		_ret_ = FWNODE_PROP_READ(_fwnode_->secondary, _propname_, _type_,	\
-				_proptype_, _val_, _nval_);				\
-	_ret_;										\
-})
+static int fwnode_property_read_int_array(struct fwnode_handle *fwnode,
+					  const char *propname,
+					  unsigned int elem_size, void *val,
+					  size_t nval)
+{
+	int ret;
+
+	ret = fwnode_call_int_op(fwnode, property_read_int_array, propname,
+				 elem_size, val, nval);
+	if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
+	    !IS_ERR_OR_NULL(fwnode->secondary))
+		ret = fwnode_call_int_op(
+			fwnode->secondary, property_read_int_array, propname,
+			elem_size, val, nval);
+
+	return ret;
+}
 
 /**
  * fwnode_property_read_u8_array - return a u8 array property of firmware node
@@ -456,8 +470,8 @@ EXPORT_SYMBOL_GPL(device_property_match_string);
 int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
 				  const char *propname, u8 *val, size_t nval)
 {
-	return FWNODE_PROP_READ_ARRAY(fwnode, propname, u8, DEV_PROP_U8,
-				      val, nval);
+	return fwnode_property_read_int_array(fwnode, propname, sizeof(u8),
+					      val, nval);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array);
 
@@ -482,8 +496,8 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array);
 int fwnode_property_read_u16_array(struct fwnode_handle *fwnode,
 				   const char *propname, u16 *val, size_t nval)
 {
-	return FWNODE_PROP_READ_ARRAY(fwnode, propname, u16, DEV_PROP_U16,
-				      val, nval);
+	return fwnode_property_read_int_array(fwnode, propname, sizeof(u16),
+					      val, nval);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array);
 
@@ -508,8 +522,8 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array);
 int fwnode_property_read_u32_array(struct fwnode_handle *fwnode,
 				   const char *propname, u32 *val, size_t nval)
 {
-	return FWNODE_PROP_READ_ARRAY(fwnode, propname, u32, DEV_PROP_U32,
-				      val, nval);
+	return fwnode_property_read_int_array(fwnode, propname, sizeof(u32),
+					      val, nval);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array);
 
@@ -534,29 +548,11 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array);
 int fwnode_property_read_u64_array(struct fwnode_handle *fwnode,
 				   const char *propname, u64 *val, size_t nval)
 {
-	return FWNODE_PROP_READ_ARRAY(fwnode, propname, u64, DEV_PROP_U64,
-				      val, nval);
+	return fwnode_property_read_int_array(fwnode, propname, sizeof(u64),
+					      val, nval);
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array);
 
-static int __fwnode_property_read_string_array(struct fwnode_handle *fwnode,
-					       const char *propname,
-					       const char **val, size_t nval)
-{
-	if (is_of_node(fwnode))
-		return val ?
-			of_property_read_string_array(to_of_node(fwnode),
-						      propname, val, nval) :
-			of_property_count_strings(to_of_node(fwnode), propname);
-	else if (is_acpi_node(fwnode))
-		return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
-					   val, nval);
-	else if (is_pset_node(fwnode))
-		return pset_prop_read_string_array(to_pset_node(fwnode),
-						   propname, val, nval);
-	return -ENXIO;
-}
-
 /**
  * fwnode_property_read_string_array - return string array property of a node
  * @fwnode: Firmware node to get the property of
@@ -581,11 +577,13 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
 {
 	int ret;
 
-	ret = __fwnode_property_read_string_array(fwnode, propname, val, nval);
+	ret = fwnode_call_int_op(fwnode, property_read_string_array, propname,
+				 val, nval);
 	if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
 	    !IS_ERR_OR_NULL(fwnode->secondary))
-		ret = __fwnode_property_read_string_array(fwnode->secondary,
-							  propname, val, nval);
+		ret = fwnode_call_int_op(fwnode->secondary,
+					 property_read_string_array, propname,
+					 val, nval);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(fwnode_property_read_string_array);
@@ -903,6 +901,7 @@ int device_add_properties(struct device *dev,
 		return PTR_ERR(p);
 
 	p->fwnode.type = FWNODE_PDATA;
+	p->fwnode.ops = &pset_fwnode_ops;
 	set_secondary_fwnode(dev, &p->fwnode);
 	return 0;
 }
@@ -938,19 +937,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_next_parent);
  */
 struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode)
 {
-	struct fwnode_handle *parent = NULL;
-
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
-
-		node = of_get_parent(to_of_node(fwnode));
-		if (node)
-			parent = &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		parent = acpi_node_get_parent(fwnode);
-	}
-
-	return parent;
+	return fwnode_call_ptr_op(fwnode, get_parent);
 }
 EXPORT_SYMBOL_GPL(fwnode_get_parent);
 
@@ -962,18 +949,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_parent);
 struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode,
 						 struct fwnode_handle *child)
 {
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
-
-		node = of_get_next_available_child(to_of_node(fwnode),
-						   to_of_node(child));
-		if (node)
-			return &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		return acpi_get_next_subnode(fwnode, child);
-	}
-
-	return NULL;
+	return fwnode_call_ptr_op(fwnode, get_next_child_node, child);
 }
 EXPORT_SYMBOL_GPL(fwnode_get_next_child_node);
 
@@ -1005,23 +981,7 @@ EXPORT_SYMBOL_GPL(device_get_next_child_node);
 struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode,
 						  const char *childname)
 {
-	struct fwnode_handle *child;
-
-	/*
-	 * Find first matching named child node of this fwnode.
-	 * For ACPI this will be a data only sub-node.
-	 */
-	fwnode_for_each_child_node(fwnode, child) {
-		if (is_of_node(child)) {
-			if (!of_node_cmp(to_of_node(child)->name, childname))
-				return child;
-		} else if (is_acpi_data_node(child)) {
-			if (acpi_data_node_match(child, childname))
-				return child;
-		}
-	}
-
-	return NULL;
+	return fwnode_call_ptr_op(fwnode, get_named_child_node, childname);
 }
 EXPORT_SYMBOL_GPL(fwnode_get_named_child_node);
 
@@ -1043,8 +1003,7 @@ EXPORT_SYMBOL_GPL(device_get_named_child_node);
  */
 void fwnode_handle_get(struct fwnode_handle *fwnode)
 {
-	if (is_of_node(fwnode))
-		of_node_get(to_of_node(fwnode));
+	fwnode_call_void_op(fwnode, get);
 }
 EXPORT_SYMBOL_GPL(fwnode_handle_get);
 
@@ -1058,8 +1017,7 @@ EXPORT_SYMBOL_GPL(fwnode_handle_get);
  */
 void fwnode_handle_put(struct fwnode_handle *fwnode)
 {
-	if (is_of_node(fwnode))
-		of_node_put(to_of_node(fwnode));
+	fwnode_call_void_op(fwnode, put);
 }
 EXPORT_SYMBOL_GPL(fwnode_handle_put);
 
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 457c313a8924..250859234fb0 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -764,3 +764,93 @@ struct device_node *of_graph_get_remote_node(const struct device_node *node,
 	return remote;
 }
 EXPORT_SYMBOL(of_graph_get_remote_node);
+
+static void of_fwnode_get(struct fwnode_handle *fwnode)
+{
+	of_node_get(to_of_node(fwnode));
+}
+
+static void of_fwnode_put(struct fwnode_handle *fwnode)
+{
+	of_node_put(to_of_node(fwnode));
+}
+
+static bool of_fwnode_property_present(struct fwnode_handle *fwnode,
+				       const char *propname)
+{
+	return of_property_read_bool(to_of_node(fwnode), propname);
+}
+
+static int of_fwnode_property_read_int_array(struct fwnode_handle *fwnode,
+					     const char *propname,
+					     unsigned int elem_size, void *val,
+					     size_t nval)
+{
+	struct device_node *node = to_of_node(fwnode);
+
+	if (!val)
+		return of_property_count_elems_of_size(node, propname,
+						       elem_size);
+
+	switch (elem_size) {
+	case sizeof(u8):
+		return of_property_read_u8_array(node, propname, val, nval);
+	case sizeof(u16):
+		return of_property_read_u16_array(node, propname, val, nval);
+	case sizeof(u32):
+		return of_property_read_u32_array(node, propname, val, nval);
+	case sizeof(u64):
+		return of_property_read_u64_array(node, propname, val, nval);
+	}
+
+	return -ENXIO;
+}
+
+static int of_fwnode_property_read_string_array(struct fwnode_handle *fwnode,
+						const char *propname,
+						const char **val, size_t nval)
+{
+	struct device_node *node = to_of_node(fwnode);
+
+	return val ?
+		of_property_read_string_array(node, propname, val, nval) :
+		of_property_count_strings(node, propname);
+}
+
+static struct fwnode_handle *of_fwnode_get_parent(struct fwnode_handle *fwnode)
+{
+	return of_fwnode_handle(of_get_parent(to_of_node(fwnode)));
+}
+
+static struct fwnode_handle *
+of_fwnode_get_next_child_node(struct fwnode_handle *fwnode,
+			      struct fwnode_handle *child)
+{
+	return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode),
+							    to_of_node(child)));
+}
+
+static struct fwnode_handle *
+of_fwnode_get_named_child_node(struct fwnode_handle *fwnode,
+			       const char *childname)
+{
+	struct device_node *node = to_of_node(fwnode);
+	struct device_node *child;
+
+	for_each_available_child_of_node(node, child)
+		if (!of_node_cmp(child->name, childname))
+			return of_fwnode_handle(child);
+
+	return NULL;
+}
+
+const struct fwnode_operations of_fwnode_ops = {
+	.get = of_fwnode_get,
+	.put = of_fwnode_put,
+	.property_present = of_fwnode_property_present,
+	.property_read_int_array = of_fwnode_property_read_int_array,
+	.property_read_string_array = of_fwnode_property_read_string_array,
+	.get_parent = of_fwnode_get_parent,
+	.get_next_child_node = of_fwnode_get_next_child_node,
+	.get_named_child_node = of_fwnode_get_named_child_node,
+};
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 137e4a3d89c5..b8f23c521b67 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -56,6 +56,9 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
 	acpi_fwnode_handle(adev) : NULL)
 #define ACPI_HANDLE(dev)		acpi_device_handle(ACPI_COMPANION(dev))
 
+
+extern const struct fwnode_operations acpi_fwnode_ops;
+
 static inline struct fwnode_handle *acpi_alloc_fwnode_static(void)
 {
 	struct fwnode_handle *fwnode;
@@ -65,6 +68,7 @@ static inline struct fwnode_handle *acpi_alloc_fwnode_static(void)
 		return NULL;
 
 	fwnode->type = FWNODE_ACPI_STATIC;
+	fwnode->ops = &acpi_fwnode_ops;
 
 	return fwnode;
 }
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 3dff2398a5f0..8f64b3ae9c57 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -12,6 +12,8 @@
 #ifndef _LINUX_FWNODE_H_
 #define _LINUX_FWNODE_H_
 
+#include <linux/types.h>
+
 enum fwnode_type {
 	FWNODE_INVALID = 0,
 	FWNODE_OF,
@@ -22,9 +24,12 @@ enum fwnode_type {
 	FWNODE_IRQCHIP
 };
 
+struct fwnode_operations;
+
 struct fwnode_handle {
 	enum fwnode_type type;
 	struct fwnode_handle *secondary;
+	const struct fwnode_operations *ops;
 };
 
 /**
@@ -39,4 +44,53 @@ struct fwnode_endpoint {
 	const struct fwnode_handle *local_fwnode;
 };
 
+/**
+ * struct fwnode_operations - Operations for fwnode interface
+ * @get: Get a reference to an fwnode.
+ * @put: Put a reference to an fwnode.
+ * @property_present: Return true if a property is present.
+ * @property_read_integer_array: Read an array of integer properties. Return
+ *				 zero on success, a negative error code
+ *				 otherwise.
+ * @property_read_string_array: Read an array of string properties. Return zero
+ *				on success, a negative error code otherwise.
+ * @get_parent: Return the parent of an fwnode.
+ * @get_next_child_node: Return the next child node in an iteration.
+ * @get_named_child_node: Return a child node with a given name.
+ */
+struct fwnode_operations {
+	void (*get)(struct fwnode_handle *fwnode);
+	void (*put)(struct fwnode_handle *fwnode);
+	bool (*property_present)(struct fwnode_handle *fwnode,
+				 const char *propname);
+	int (*property_read_int_array)(struct fwnode_handle *fwnode,
+				       const char *propname,
+				       unsigned int elem_size, void *val,
+				       size_t nval);
+	int (*property_read_string_array)(struct fwnode_handle *fwnode_handle,
+					  const char *propname,
+					  const char **val, size_t nval);
+	struct fwnode_handle *(*get_parent)(struct fwnode_handle *fwnode);
+	struct fwnode_handle *
+	(*get_next_child_node)(struct fwnode_handle *fwnode,
+			       struct fwnode_handle *child);
+	struct fwnode_handle *
+	(*get_named_child_node)(struct fwnode_handle *fwnode, const char *name);
+};
+
+#define fwnode_has_op(fwnode, op)				\
+	((fwnode) && (fwnode)->ops && (fwnode)->ops->op)
+#define fwnode_call_int_op(fwnode, op, ...)				\
+	(fwnode ? (fwnode_has_op(fwnode, op) ?				\
+		   (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : -ENXIO) : \
+	 -EINVAL)
+#define fwnode_call_ptr_op(fwnode, op, ...)		\
+	(fwnode_has_op(fwnode, op) ?			\
+	 (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL)
+#define fwnode_call_void_op(fwnode, op, ...)				\
+	do {								\
+		if (fwnode_has_op(fwnode, op))				\
+			(fwnode)->ops->op(fwnode, ## __VA_ARGS__);	\
+	} while (false)
+
 #endif
diff --git a/include/linux/of.h b/include/linux/of.h
index 29b7b738b509..cdbfa88c32cf 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -100,10 +100,12 @@ struct of_reconfig_data {
 
 /* initialize a node */
 extern struct kobj_type of_node_ktype;
+extern const struct fwnode_operations of_fwnode_ops;
 static inline void of_node_init(struct device_node *node)
 {
 	kobject_init(&node->kobj, &of_node_ktype);
 	node->fwnode.type = FWNODE_OF;
+	node->fwnode.ops = &of_fwnode_ops;
 }
 
 /* true when node is initialized */
-- 
cgit v1.2.3


From 3b27d00e7b6d7c889d87fd00df600c495b968e30 Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 6 Jun 2017 12:37:38 +0300
Subject: device property: Move fwnode graph ops to firmware specific locations

Move firmware specific implementations of the fwnode graph operations to
firmware specific locations.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/property.c | 40 ++++++++++++++++++++++
 drivers/base/property.c | 91 +++++--------------------------------------------
 drivers/of/property.c   | 52 ++++++++++++++++++++++++++++
 include/linux/fwnode.h  | 14 ++++++++
 4 files changed, 114 insertions(+), 83 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 14013f635db6..a24ca61294eb 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1179,6 +1179,42 @@ acpi_fwnode_get_named_child_node(struct fwnode_handle *fwnode,
 	return NULL;
 }
 
+static struct fwnode_handle *
+acpi_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
+				    struct fwnode_handle *prev)
+{
+	struct fwnode_handle *endpoint;
+
+	endpoint = acpi_graph_get_next_endpoint(fwnode, prev);
+	if (IS_ERR(endpoint))
+		return NULL;
+
+	return endpoint;
+}
+
+static struct fwnode_handle *
+acpi_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
+{
+	struct fwnode_handle *endpoint = NULL;
+
+	acpi_graph_get_remote_endpoint(fwnode, NULL, NULL, &endpoint);
+
+	return endpoint;
+}
+
+static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
+					    struct fwnode_endpoint *endpoint)
+{
+	struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode);
+
+	endpoint->local_fwnode = fwnode;
+
+	fwnode_property_read_u32(port_fwnode, "port", &endpoint->port);
+	fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id);
+
+	return 0;
+}
+
 const struct fwnode_operations acpi_fwnode_ops = {
 	.property_present = acpi_fwnode_property_present,
 	.property_read_int_array = acpi_fwnode_property_read_int_array,
@@ -1186,4 +1222,8 @@ const struct fwnode_operations acpi_fwnode_ops = {
 	.get_parent = acpi_node_get_parent,
 	.get_next_child_node = acpi_get_next_subnode,
 	.get_named_child_node = acpi_fwnode_get_named_child_node,
+	.graph_get_next_endpoint = acpi_fwnode_graph_get_next_endpoint,
+	.graph_get_remote_endpoint = acpi_fwnode_graph_get_remote_endpoint,
+	.graph_get_port_parent = acpi_node_get_parent,
+	.graph_parse_endpoint = acpi_fwnode_graph_parse_endpoint,
 };
diff --git a/drivers/base/property.c b/drivers/base/property.c
index fee0705e40e9..e1a58ac8840e 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1156,24 +1156,7 @@ struct fwnode_handle *
 fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
 			       struct fwnode_handle *prev)
 {
-	struct fwnode_handle *endpoint = NULL;
-
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
-
-		node = of_graph_get_next_endpoint(to_of_node(fwnode),
-						  to_of_node(prev));
-
-		if (node)
-			endpoint = &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		endpoint = acpi_graph_get_next_endpoint(fwnode, prev);
-		if (IS_ERR(endpoint))
-			endpoint = NULL;
-	}
-
-	return endpoint;
-
+	return fwnode_call_ptr_op(fwnode, graph_get_next_endpoint, prev);
 }
 EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
 
@@ -1186,22 +1169,12 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
 struct fwnode_handle *
 fwnode_graph_get_remote_port_parent(struct fwnode_handle *fwnode)
 {
-	struct fwnode_handle *parent = NULL;
+	struct fwnode_handle *port, *parent;
 
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
+	port = fwnode_graph_get_remote_port(fwnode);
+	parent = fwnode_call_ptr_op(port, graph_get_port_parent);
 
-		node = of_graph_get_remote_port_parent(to_of_node(fwnode));
-		if (node)
-			parent = &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		int ret;
-
-		ret = acpi_graph_get_remote_endpoint(fwnode, &parent, NULL,
-						     NULL);
-		if (ret)
-			return NULL;
-	}
+	fwnode_handle_put(port);
 
 	return parent;
 }
@@ -1215,23 +1188,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port_parent);
  */
 struct fwnode_handle *fwnode_graph_get_remote_port(struct fwnode_handle *fwnode)
 {
-	struct fwnode_handle *port = NULL;
-
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
-
-		node = of_graph_get_remote_port(to_of_node(fwnode));
-		if (node)
-			port = &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		int ret;
-
-		ret = acpi_graph_get_remote_endpoint(fwnode, NULL, &port, NULL);
-		if (ret)
-			return NULL;
-	}
-
-	return port;
+	return fwnode_get_next_parent(fwnode_graph_get_remote_endpoint(fwnode));
 }
 EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port);
 
@@ -1244,25 +1201,7 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_port);
 struct fwnode_handle *
 fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
 {
-	struct fwnode_handle *endpoint = NULL;
-
-	if (is_of_node(fwnode)) {
-		struct device_node *node;
-
-		node = of_parse_phandle(to_of_node(fwnode), "remote-endpoint",
-					0);
-		if (node)
-			endpoint = &node->fwnode;
-	} else if (is_acpi_node(fwnode)) {
-		int ret;
-
-		ret = acpi_graph_get_remote_endpoint(fwnode, NULL, NULL,
-						     &endpoint);
-		if (ret)
-			return NULL;
-	}
-
-	return endpoint;
+	return fwnode_call_ptr_op(fwnode, graph_get_remote_endpoint);
 }
 EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint);
 
@@ -1278,22 +1217,8 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint);
 int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
 				struct fwnode_endpoint *endpoint)
 {
-	struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode);
-
 	memset(endpoint, 0, sizeof(*endpoint));
 
-	endpoint->local_fwnode = fwnode;
-
-	if (is_acpi_node(port_fwnode)) {
-		fwnode_property_read_u32(port_fwnode, "port", &endpoint->port);
-		fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id);
-	} else {
-		fwnode_property_read_u32(port_fwnode, "reg", &endpoint->port);
-		fwnode_property_read_u32(fwnode, "reg", &endpoint->id);
-	}
-
-	fwnode_handle_put(port_fwnode);
-
-	return 0;
+	return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint);
 }
 EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 250859234fb0..e859e41e33f3 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -844,6 +844,54 @@ of_fwnode_get_named_child_node(struct fwnode_handle *fwnode,
 	return NULL;
 }
 
+static struct fwnode_handle *
+of_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
+				  struct fwnode_handle *prev)
+{
+	return of_fwnode_handle(of_graph_get_next_endpoint(to_of_node(fwnode),
+							   to_of_node(prev)));
+}
+
+static struct fwnode_handle *
+of_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
+{
+	return of_fwnode_handle(of_parse_phandle(to_of_node(fwnode),
+						 "remote-endpoint", 0));
+}
+
+static struct fwnode_handle *
+of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode)
+{
+	struct device_node *np;
+
+	/* Get the parent of the port */
+	np = of_get_next_parent(to_of_node(fwnode));
+	if (!np)
+		return NULL;
+
+	/* Is this the "ports" node? If not, it's the port parent. */
+	if (of_node_cmp(np->name, "ports"))
+		return of_fwnode_handle(np);
+
+	return of_fwnode_handle(of_get_next_parent(np));
+}
+
+static int of_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
+					  struct fwnode_endpoint *endpoint)
+{
+	struct device_node *node = to_of_node(fwnode);
+	struct device_node *port_node = of_get_parent(node);
+
+	endpoint->local_fwnode = fwnode;
+
+	of_property_read_u32(port_node, "reg", &endpoint->port);
+	of_property_read_u32(node, "reg", &endpoint->id);
+
+	of_node_put(port_node);
+
+	return 0;
+}
+
 const struct fwnode_operations of_fwnode_ops = {
 	.get = of_fwnode_get,
 	.put = of_fwnode_put,
@@ -853,4 +901,8 @@ const struct fwnode_operations of_fwnode_ops = {
 	.get_parent = of_fwnode_get_parent,
 	.get_next_child_node = of_fwnode_get_next_child_node,
 	.get_named_child_node = of_fwnode_get_named_child_node,
+	.graph_get_next_endpoint = of_fwnode_graph_get_next_endpoint,
+	.graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint,
+	.graph_get_port_parent = of_fwnode_graph_get_port_parent,
+	.graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
 };
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index 8f64b3ae9c57..e315d867d631 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -57,6 +57,11 @@ struct fwnode_endpoint {
  * @get_parent: Return the parent of an fwnode.
  * @get_next_child_node: Return the next child node in an iteration.
  * @get_named_child_node: Return a child node with a given name.
+ * @graph_get_next_endpoint: Return an endpoint node in an iteration.
+ * @graph_get_remote_endpoint: Return the remote endpoint node of a local
+ *			       endpoint node.
+ * @graph_get_port_parent: Return the parent node of a port node.
+ * @graph_parse_endpoint: Parse endpoint for port and endpoint id.
  */
 struct fwnode_operations {
 	void (*get)(struct fwnode_handle *fwnode);
@@ -76,6 +81,15 @@ struct fwnode_operations {
 			       struct fwnode_handle *child);
 	struct fwnode_handle *
 	(*get_named_child_node)(struct fwnode_handle *fwnode, const char *name);
+	struct fwnode_handle *
+	(*graph_get_next_endpoint)(struct fwnode_handle *fwnode,
+				   struct fwnode_handle *prev);
+	struct fwnode_handle *
+	(*graph_get_remote_endpoint)(struct fwnode_handle *fwnode);
+	struct fwnode_handle *
+	(*graph_get_port_parent)(struct fwnode_handle *fwnode);
+	int (*graph_parse_endpoint)(struct fwnode_handle *fwnode,
+				    struct fwnode_endpoint *endpoint);
 };
 
 #define fwnode_has_op(fwnode, op)				\
-- 
cgit v1.2.3


From 2294b3af05e9b3fe0b84a78971e709037bd7593c Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 6 Jun 2017 12:37:39 +0300
Subject: device property: Introduce fwnode_device_is_available()

Add fwnode_device_is_available() to tell whether the device corresponding
to a certain fwnode_handle is available for use.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/property.c  |  9 +++++++++
 drivers/base/property.c  | 10 ++++++++++
 drivers/of/property.c    |  6 ++++++
 include/linux/fwnode.h   |  1 +
 include/linux/property.h |  1 +
 5 files changed, 27 insertions(+)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index a24ca61294eb..917c789f953d 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1121,6 +1121,14 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode,
 	return 0;
 }
 
+static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode)
+{
+	if (!is_acpi_device_node(fwnode))
+		return false;
+
+	return acpi_device_is_present(to_acpi_device_node(fwnode));
+}
+
 static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode,
 					 const char *propname)
 {
@@ -1216,6 +1224,7 @@ static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
 }
 
 const struct fwnode_operations acpi_fwnode_ops = {
+	.device_is_available = acpi_fwnode_device_is_available,
 	.property_present = acpi_fwnode_property_present,
 	.property_read_int_array = acpi_fwnode_property_read_int_array,
 	.property_read_string_array = acpi_fwnode_property_read_string_array,
diff --git a/drivers/base/property.c b/drivers/base/property.c
index e1a58ac8840e..b979f8a2f4fb 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1021,6 +1021,16 @@ void fwnode_handle_put(struct fwnode_handle *fwnode)
 }
 EXPORT_SYMBOL_GPL(fwnode_handle_put);
 
+/**
+ * fwnode_device_is_available - check if a device is available for use
+ * @fwnode: Pointer to the fwnode of the device.
+ */
+bool fwnode_device_is_available(struct fwnode_handle *fwnode)
+{
+	return fwnode_call_int_op(fwnode, device_is_available);
+}
+EXPORT_SYMBOL_GPL(fwnode_device_is_available);
+
 /**
  * device_get_child_node_count - return the number of child nodes for device
  * @dev: Device to cound the child nodes for
diff --git a/drivers/of/property.c b/drivers/of/property.c
index e859e41e33f3..c96389b7c6b3 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -775,6 +775,11 @@ static void of_fwnode_put(struct fwnode_handle *fwnode)
 	of_node_put(to_of_node(fwnode));
 }
 
+static bool of_fwnode_device_is_available(struct fwnode_handle *fwnode)
+{
+	return of_device_is_available(to_of_node(fwnode));
+}
+
 static bool of_fwnode_property_present(struct fwnode_handle *fwnode,
 				       const char *propname)
 {
@@ -895,6 +900,7 @@ static int of_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
 const struct fwnode_operations of_fwnode_ops = {
 	.get = of_fwnode_get,
 	.put = of_fwnode_put,
+	.device_is_available = of_fwnode_device_is_available,
 	.property_present = of_fwnode_property_present,
 	.property_read_int_array = of_fwnode_property_read_int_array,
 	.property_read_string_array = of_fwnode_property_read_string_array,
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index e315d867d631..9ab375419189 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -66,6 +66,7 @@ struct fwnode_endpoint {
 struct fwnode_operations {
 	void (*get)(struct fwnode_handle *fwnode);
 	void (*put)(struct fwnode_handle *fwnode);
+	bool (*device_is_available)(struct fwnode_handle *fwnode);
 	bool (*property_present)(struct fwnode_handle *fwnode,
 				 const char *propname);
 	int (*property_read_int_array)(struct fwnode_handle *fwnode,
diff --git a/include/linux/property.h b/include/linux/property.h
index 2f482616a2f2..7be014af78ed 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -51,6 +51,7 @@ int device_property_read_string(struct device *dev, const char *propname,
 int device_property_match_string(struct device *dev,
 				 const char *propname, const char *string);
 
+bool fwnode_device_is_available(struct fwnode_handle *fwnode);
 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,
-- 
cgit v1.2.3