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path: root/drivers/acpi/property.c
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Diffstat (limited to 'drivers/acpi/property.c')
-rw-r--r--drivers/acpi/property.c231
1 files changed, 141 insertions, 90 deletions
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 09b7974b6c62..c1c216163de3 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -19,21 +19,19 @@
#include "internal.h"
-static int acpi_data_get_property_array(struct acpi_device_data *data,
+static int acpi_data_get_property_array(const struct acpi_device_data *data,
const char *name,
acpi_object_type type,
const union acpi_object **obj);
-/* ACPI _DSD device properties UUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */
-static const u8 prp_uuid[16] = {
- 0x14, 0xd8, 0xff, 0xda, 0xba, 0x6e, 0x8c, 0x4d,
- 0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01
-};
-/* ACPI _DSD data subnodes UUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */
-static const u8 ads_uuid[16] = {
- 0xe6, 0xe3, 0xb8, 0xdb, 0x86, 0x58, 0xa6, 0x4b,
- 0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b
-};
+/* ACPI _DSD device properties GUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */
+static const guid_t prp_guid =
+ GUID_INIT(0xdaffd814, 0x6eba, 0x4d8c,
+ 0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01);
+/* ACPI _DSD data subnodes GUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */
+static const guid_t ads_guid =
+ GUID_INIT(0xdbb8e3e6, 0x5886, 0x4ba6,
+ 0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b);
static bool acpi_enumerate_nondev_subnodes(acpi_handle scope,
const union acpi_object *desc,
@@ -56,8 +54,7 @@ static bool acpi_nondev_subnode_extract(const union acpi_object *desc,
return false;
dn->name = link->package.elements[0].string.pointer;
- dn->fwnode.type = FWNODE_ACPI_DATA;
- dn->fwnode.ops = &acpi_fwnode_ops;
+ dn->fwnode.ops = &acpi_data_fwnode_ops;
dn->parent = parent;
INIT_LIST_HEAD(&dn->data.subnodes);
@@ -190,22 +187,23 @@ static bool acpi_enumerate_nondev_subnodes(acpi_handle scope,
{
int i;
- /* Look for the ACPI data subnodes UUID. */
+ /* Look for the ACPI data subnodes GUID. */
for (i = 0; i < desc->package.count; i += 2) {
- const union acpi_object *uuid, *links;
+ const union acpi_object *guid, *links;
- uuid = &desc->package.elements[i];
+ guid = &desc->package.elements[i];
links = &desc->package.elements[i + 1];
/*
- * The first element must be a UUID and the second one must be
+ * The first element must be a GUID and the second one must be
* a package.
*/
- if (uuid->type != ACPI_TYPE_BUFFER || uuid->buffer.length != 16
- || links->type != ACPI_TYPE_PACKAGE)
+ if (guid->type != ACPI_TYPE_BUFFER ||
+ guid->buffer.length != 16 ||
+ links->type != ACPI_TYPE_PACKAGE)
break;
- if (memcmp(uuid->buffer.pointer, ads_uuid, sizeof(ads_uuid)))
+ if (!guid_equal((guid_t *)guid->buffer.pointer, &ads_guid))
continue;
return acpi_add_nondev_subnodes(scope, links, &data->subnodes,
@@ -298,26 +296,27 @@ static bool acpi_extract_properties(const union acpi_object *desc,
if (desc->package.count % 2)
return false;
- /* Look for the device properties UUID. */
+ /* Look for the device properties GUID. */
for (i = 0; i < desc->package.count; i += 2) {
- const union acpi_object *uuid, *properties;
+ const union acpi_object *guid, *properties;
- uuid = &desc->package.elements[i];
+ guid = &desc->package.elements[i];
properties = &desc->package.elements[i + 1];
/*
- * The first element must be a UUID and the second one must be
+ * The first element must be a GUID and the second one must be
* a package.
*/
- if (uuid->type != ACPI_TYPE_BUFFER || uuid->buffer.length != 16
- || properties->type != ACPI_TYPE_PACKAGE)
+ if (guid->type != ACPI_TYPE_BUFFER ||
+ guid->buffer.length != 16 ||
+ properties->type != ACPI_TYPE_PACKAGE)
break;
- if (memcmp(uuid->buffer.pointer, prp_uuid, sizeof(prp_uuid)))
+ if (!guid_equal((guid_t *)guid->buffer.pointer, &prp_guid))
continue;
/*
- * We found the matching UUID. Now validate the format of the
+ * We found the matching GUID. Now validate the format of the
* package immediately following it.
*/
if (!acpi_properties_format_valid(properties))
@@ -424,7 +423,7 @@ void acpi_free_properties(struct acpi_device *adev)
* %-EINVAL if the property doesn't exist,
* %-EPROTO if the property value type doesn't match @type.
*/
-static int acpi_data_get_property(struct acpi_device_data *data,
+static int acpi_data_get_property(const struct acpi_device_data *data,
const char *name, acpi_object_type type,
const union acpi_object **obj)
{
@@ -466,20 +465,21 @@ static int acpi_data_get_property(struct acpi_device_data *data,
* @type: Expected property type.
* @obj: Location to store the property value (if not %NULL).
*/
-int acpi_dev_get_property(struct acpi_device *adev, const char *name,
+int acpi_dev_get_property(const struct acpi_device *adev, const char *name,
acpi_object_type type, const union acpi_object **obj)
{
return adev ? acpi_data_get_property(&adev->data, name, type, obj) : -EINVAL;
}
EXPORT_SYMBOL_GPL(acpi_dev_get_property);
-static struct acpi_device_data *acpi_device_data_of_node(struct fwnode_handle *fwnode)
+static const struct acpi_device_data *
+acpi_device_data_of_node(const struct fwnode_handle *fwnode)
{
- if (fwnode->type == FWNODE_ACPI) {
- struct acpi_device *adev = to_acpi_device_node(fwnode);
+ if (is_acpi_device_node(fwnode)) {
+ const struct acpi_device *adev = to_acpi_device_node(fwnode);
return &adev->data;
- } else if (fwnode->type == FWNODE_ACPI_DATA) {
- struct acpi_data_node *dn = to_acpi_data_node(fwnode);
+ } else if (is_acpi_data_node(fwnode)) {
+ const struct acpi_data_node *dn = to_acpi_data_node(fwnode);
return &dn->data;
}
return NULL;
@@ -491,8 +491,8 @@ static struct acpi_device_data *acpi_device_data_of_node(struct fwnode_handle *f
* @propname: Name of the property.
* @valptr: Location to store a pointer to the property value (if not %NULL).
*/
-int acpi_node_prop_get(struct fwnode_handle *fwnode, const char *propname,
- void **valptr)
+int acpi_node_prop_get(const struct fwnode_handle *fwnode,
+ const char *propname, void **valptr)
{
return acpi_data_get_property(acpi_device_data_of_node(fwnode),
propname, ACPI_TYPE_ANY,
@@ -518,7 +518,7 @@ int acpi_node_prop_get(struct fwnode_handle *fwnode, const char *propname,
* %-EPROTO if the property is not a package or the type of its elements
* doesn't match @type.
*/
-static int acpi_data_get_property_array(struct acpi_device_data *data,
+static int acpi_data_get_property_array(const struct acpi_device_data *data,
const char *name,
acpi_object_type type,
const union acpi_object **obj)
@@ -578,13 +578,13 @@ static int acpi_data_get_property_array(struct acpi_device_data *data,
*
* Return: %0 on success, negative error code on failure.
*/
-int __acpi_node_get_property_reference(struct fwnode_handle *fwnode,
+int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
const char *propname, size_t index, size_t num_args,
struct acpi_reference_args *args)
{
const union acpi_object *element, *end;
const union acpi_object *obj;
- struct acpi_device_data *data;
+ const struct acpi_device_data *data;
struct acpi_device *device;
int ret, idx = 0;
@@ -680,7 +680,7 @@ int __acpi_node_get_property_reference(struct fwnode_handle *fwnode,
}
EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference);
-static int acpi_data_prop_read_single(struct acpi_device_data *data,
+static int acpi_data_prop_read_single(const struct acpi_device_data *data,
const char *propname,
enum dev_prop_type proptype, void *val)
{
@@ -819,7 +819,7 @@ static int acpi_copy_property_array_string(const union acpi_object *items,
return nval;
}
-static int acpi_data_prop_read(struct acpi_device_data *data,
+static int acpi_data_prop_read(const struct acpi_device_data *data,
const char *propname,
enum dev_prop_type proptype,
void *val, size_t nval)
@@ -873,7 +873,7 @@ static int acpi_data_prop_read(struct acpi_device_data *data,
return ret;
}
-int acpi_dev_prop_read(struct acpi_device *adev, const char *propname,
+int acpi_dev_prop_read(const struct acpi_device *adev, const char *propname,
enum dev_prop_type proptype, void *val, size_t nval)
{
return adev ? acpi_data_prop_read(&adev->data, propname, proptype, val, nval) : -EINVAL;
@@ -891,8 +891,9 @@ int acpi_dev_prop_read(struct acpi_device *adev, const char *propname,
* of the property. Otherwise, read at most @nval values to the array at the
* location pointed to by @val.
*/
-int acpi_node_prop_read(struct fwnode_handle *fwnode, const char *propname,
- enum dev_prop_type proptype, void *val, size_t nval)
+int acpi_node_prop_read(const struct fwnode_handle *fwnode,
+ const char *propname, enum dev_prop_type proptype,
+ void *val, size_t nval)
{
return acpi_data_prop_read(acpi_device_data_of_node(fwnode),
propname, proptype, val, nval);
@@ -903,13 +904,15 @@ int acpi_node_prop_read(struct fwnode_handle *fwnode, const char *propname,
* @fwnode: Firmware node to find the next child node for.
* @child: Handle to one of the device's child nodes or a null handle.
*/
-struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode,
+struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode,
struct fwnode_handle *child)
{
- struct acpi_device *adev = to_acpi_device_node(fwnode);
- struct list_head *head, *next;
+ const struct acpi_device *adev = to_acpi_device_node(fwnode);
+ struct acpi_device *child_adev = NULL;
+ const struct list_head *head;
+ struct list_head *next;
- if (!child || child->type == FWNODE_ACPI) {
+ if (!child || is_acpi_device_node(child)) {
if (adev)
head = &adev->children;
else
@@ -919,26 +922,27 @@ struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode,
goto nondev;
if (child) {
- adev = to_acpi_device_node(child);
- next = adev->node.next;
+ child_adev = to_acpi_device_node(child);
+ next = child_adev->node.next;
if (next == head) {
child = NULL;
goto nondev;
}
- adev = list_entry(next, struct acpi_device, node);
+ child_adev = list_entry(next, struct acpi_device, node);
} else {
- adev = list_first_entry(head, struct acpi_device, node);
+ child_adev = list_first_entry(head, struct acpi_device,
+ node);
}
- return acpi_fwnode_handle(adev);
+ return acpi_fwnode_handle(child_adev);
}
nondev:
- if (!child || child->type == FWNODE_ACPI_DATA) {
- struct acpi_data_node *data = to_acpi_data_node(fwnode);
+ if (!child || is_acpi_data_node(child)) {
+ const struct acpi_data_node *data = to_acpi_data_node(fwnode);
struct acpi_data_node *dn;
- if (adev)
- head = &adev->data.subnodes;
+ if (child_adev)
+ head = &child_adev->data.subnodes;
else if (data)
head = &data->data.subnodes;
else
@@ -969,7 +973,7 @@ struct fwnode_handle *acpi_get_next_subnode(struct fwnode_handle *fwnode,
* Returns parent node of an ACPI device or data firmware node or %NULL if
* not available.
*/
-struct fwnode_handle *acpi_node_get_parent(struct fwnode_handle *fwnode)
+struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode)
{
if (is_acpi_data_node(fwnode)) {
/* All data nodes have parent pointer so just return that */
@@ -998,8 +1002,8 @@ struct fwnode_handle *acpi_node_get_parent(struct fwnode_handle *fwnode)
* %NULL if there is no next endpoint, ERR_PTR() in case of error. In case
* of success the next endpoint is returned.
*/
-struct fwnode_handle *acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode,
- struct fwnode_handle *prev)
+struct fwnode_handle *acpi_graph_get_next_endpoint(
+ const struct fwnode_handle *fwnode, struct fwnode_handle *prev)
{
struct fwnode_handle *port = NULL;
struct fwnode_handle *endpoint;
@@ -1046,7 +1050,8 @@ struct fwnode_handle *acpi_graph_get_next_endpoint(struct fwnode_handle *fwnode,
* the child node on success, NULL otherwise.
*/
static struct fwnode_handle *acpi_graph_get_child_prop_value(
- struct fwnode_handle *fwnode, const char *prop_name, unsigned int val)
+ const struct fwnode_handle *fwnode, const char *prop_name,
+ unsigned int val)
{
struct fwnode_handle *child;
@@ -1075,17 +1080,18 @@ static struct fwnode_handle *acpi_graph_get_child_prop_value(
* fields requested by the caller. Returns %0 in case of success and
* negative errno otherwise.
*/
-int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode,
+int acpi_graph_get_remote_endpoint(const struct fwnode_handle *__fwnode,
struct fwnode_handle **parent,
struct fwnode_handle **port,
struct fwnode_handle **endpoint)
{
+ struct fwnode_handle *fwnode;
unsigned int port_nr, endpoint_nr;
struct acpi_reference_args args;
int ret;
memset(&args, 0, sizeof(args));
- ret = acpi_node_get_property_reference(fwnode, "remote-endpoint", 0,
+ ret = acpi_node_get_property_reference(__fwnode, "remote-endpoint", 0,
&args);
if (ret)
return ret;
@@ -1127,7 +1133,7 @@ int acpi_graph_get_remote_endpoint(struct fwnode_handle *fwnode,
return 0;
}
-static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode)
+static bool acpi_fwnode_device_is_available(const struct fwnode_handle *fwnode)
{
if (!is_acpi_device_node(fwnode))
return false;
@@ -1135,16 +1141,17 @@ static bool acpi_fwnode_device_is_available(struct fwnode_handle *fwnode)
return acpi_device_is_present(to_acpi_device_node(fwnode));
}
-static bool acpi_fwnode_property_present(struct fwnode_handle *fwnode,
+static bool acpi_fwnode_property_present(const 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)
+static int
+acpi_fwnode_property_read_int_array(const struct fwnode_handle *fwnode,
+ const char *propname,
+ unsigned int elem_size, void *val,
+ size_t nval)
{
enum dev_prop_type type;
@@ -1168,16 +1175,17 @@ static int acpi_fwnode_property_read_int_array(struct fwnode_handle *fwnode,
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)
+static int
+acpi_fwnode_property_read_string_array(const 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,
+acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
const char *childname)
{
struct fwnode_handle *child;
@@ -1193,8 +1201,34 @@ acpi_fwnode_get_named_child_node(struct fwnode_handle *fwnode,
return NULL;
}
+static int
+acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode,
+ const char *prop, const char *nargs_prop,
+ unsigned int args_count, unsigned int index,
+ struct fwnode_reference_args *args)
+{
+ struct acpi_reference_args acpi_args;
+ unsigned int i;
+ int ret;
+
+ ret = __acpi_node_get_property_reference(fwnode, prop, index,
+ args_count, &acpi_args);
+ if (ret < 0)
+ return ret;
+ if (!args)
+ return 0;
+
+ args->nargs = acpi_args.nargs;
+ args->fwnode = acpi_fwnode_handle(acpi_args.adev);
+
+ for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++)
+ args->args[i] = i < acpi_args.nargs ? acpi_args.args[i] : 0;
+
+ return 0;
+}
+
static struct fwnode_handle *
-acpi_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
+acpi_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode,
struct fwnode_handle *prev)
{
struct fwnode_handle *endpoint;
@@ -1207,7 +1241,7 @@ acpi_fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
}
static struct fwnode_handle *
-acpi_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
+acpi_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode)
{
struct fwnode_handle *endpoint = NULL;
@@ -1216,7 +1250,13 @@ acpi_fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode)
return endpoint;
}
-static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
+static struct fwnode_handle *
+acpi_fwnode_get_parent(struct fwnode_handle *fwnode)
+{
+ return acpi_node_get_parent(fwnode);
+}
+
+static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
struct fwnode_endpoint *endpoint)
{
struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode);
@@ -1229,16 +1269,27 @@ static int acpi_fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,
return 0;
}
-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,
- .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,
-};
+#define DECLARE_ACPI_FWNODE_OPS(ops) \
+ const struct fwnode_operations 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, \
+ .get_parent = acpi_node_get_parent, \
+ .get_next_child_node = acpi_get_next_subnode, \
+ .get_named_child_node = acpi_fwnode_get_named_child_node, \
+ .get_reference_args = acpi_fwnode_get_reference_args, \
+ .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_fwnode_get_parent, \
+ .graph_parse_endpoint = acpi_fwnode_graph_parse_endpoint, \
+ }; \
+ EXPORT_SYMBOL_GPL(ops)
+
+DECLARE_ACPI_FWNODE_OPS(acpi_device_fwnode_ops);
+DECLARE_ACPI_FWNODE_OPS(acpi_data_fwnode_ops);
+const struct fwnode_operations acpi_static_fwnode_ops;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 21:40:38 +0000